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power_play/src/user.c

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#include "user.h"
#include "sim.h"
#include "sim_ent.h"
#include "sim_step.h"
#include "renderer.h"
#include "font.h"
#include "sprite.h"
#include "draw.h"
#include "intrinsics.h"
#include "asset_cache.h"
#include "string.h"
#include "scratch.h"
#include "math.h"
#include "sys.h"
#include "mixer.h"
#include "atomic.h"
#include "collider.h"
#include "rand.h"
#include "log.h"
#include "sock.h"
#include "host.h"
#include "bitbuff.h"
#include "gstat.h"
#include "app.h"
struct bind_state {
b32 is_held; /* Is this bind held down this frame */
u32 num_presses; /* How many times was this bind pressed since last frame */
u32 num_presses_and_repeats; /* Same as `num_presses` but includes key repeats as well */
u32 num_releases; /* How many times was this bind released since last frame */
};
struct second_stat {
u64 last_second_start;
u64 last_second_end;
u64 last_second;
};
GLOBAL struct {
struct atomic_i32 user_thread_shutdown;
struct sys_thread user_thread;
struct atomic_i32 local_sim_thread_shutdown;
struct sys_thread local_sim_thread;
struct sim_ctx *local_sim_ctx;
struct arena arena;
struct sys_window *window;
struct string connect_address_str;
struct sim_client_store *user_client_store;
struct sim_client *user_unblended_client; /* Contains snapshots received from local sim */
struct sim_client *user_blended_client; /* Contains single snapshot from result of blending local sim snapshots */
struct sim_snapshot *ss_blended; /* Points to blended snapshot contained in blended client */
/* Usage stats */
i64 last_second_reset_ns;
struct second_stat net_bytes_read;
struct second_stat net_bytes_sent;
/* Render targets */
struct renderer_texture final_texture;
struct renderer_texture world_texture;
struct renderer_texture ui_texture;
struct renderer_texture backbuffer_texture;
struct renderer_cmd_buffer *world_cmd_buffer;
struct renderer_cmd_buffer *ui_cmd_buffer;
struct renderer_cmd_buffer *final_cmd_buffer;
struct renderer_cmd_buffer *backbuffer_cmd_buffer;
struct xform world_to_ui_xf;
struct bind_state bind_states[USER_BIND_KIND_COUNT];
struct sim_ent_id debug_following;
b32 debug_camera;
b32 debug_camera_panning;
struct v2 debug_camera_pan_start;
b32 debug_draw;
/* Window -> user */
struct sys_mutex sys_events_mutex;
struct arena sys_events_arena;
/* User -> local sim */
struct sys_mutex user_sim_cmd_mutex;
struct sim_control user_sim_cmd_control;
struct sim_ent_id user_hovered_ent;
u64 last_user_sim_cmd_gen;
u64 user_sim_cmd_gen;
/* Local sim -> user */
struct sys_mutex local_to_user_client_mutex;
struct sim_client_store *local_to_user_client_store;
struct sim_client *local_to_user_client;
i64 local_to_user_client_publish_dt_ns;
i64 local_to_user_client_publish_time_ns;
/* Rolling window of local sim -> user publish time deltas */
i64 last_local_to_user_snapshot_published_at_ns;
i64 average_local_to_user_snapshot_publish_dt_ns;
i64 local_sim_predicted_time_ns; /* Calculated from <last local sim to user pubilsh time> + <time since last local sim to user publish> */
i64 render_time_target_ns; /* Claculated from <local_sim_rpedicted_time_ns> - <render interp delay> */
i64 render_time_ns; /* Incremented at a constant rate based on average local to user publish delta, but snaps to render_time_target_ns if it gets too distant */
u64 local_sim_last_known_tick;
i64 local_sim_last_known_time_ns;
i64 real_dt_ns;
i64 real_time_ns;
/* Per-frame */
struct v2 screen_size;
struct v2 screen_cursor;
struct v2 ui_screen_offset;
struct v2 ui_size;
struct v2 ui_center;
struct v2 ui_cursor;
struct v2 world_cursor;
} G = ZI, DEBUG_ALIAS(G, G_user);
/* ========================== *
* Bind state
* ========================== */
/* TODO: Remove this */
GLOBAL READONLY enum user_bind_kind g_binds[SYS_BTN_COUNT] = {
[SYS_BTN_W] = USER_BIND_KIND_MOVE_UP,
[SYS_BTN_S] = USER_BIND_KIND_MOVE_DOWN,
[SYS_BTN_A] = USER_BIND_KIND_MOVE_LEFT,
[SYS_BTN_D] = USER_BIND_KIND_MOVE_RIGHT,
[SYS_BTN_ALT] = USER_BIND_KIND_WALK,
[SYS_BTN_M1] = USER_BIND_KIND_FIRE,
/* Testing */
[SYS_BTN_M4] = USER_BIND_KIND_TILE_TEST,
[SYS_BTN_M2] = USER_BIND_KIND_DEBUG_DRAG,
[SYS_BTN_C] = USER_BIND_KIND_DEBUG_CLEAR,
[SYS_BTN_V] = USER_BIND_KIND_DEBUG_SPAWN,
[SYS_BTN_N] = USER_BIND_KIND_DEBUG_STEP,
[SYS_BTN_Q] = USER_BIND_KIND_DEBUG_FOLLOW,
[SYS_BTN_F1] = USER_BIND_KIND_DEBUG_PAUSE,
[SYS_BTN_F2] = USER_BIND_KIND_DEBUG_CAMERA,
[SYS_BTN_F3] = USER_BIND_KIND_DEBUG_DRAW,
[SYS_BTN_F11] = USER_BIND_KIND_FULLSCREEN,
[SYS_BTN_MWHEELUP] = USER_BIND_KIND_ZOOM_IN,
[SYS_BTN_MWHEELDOWN] = USER_BIND_KIND_ZOOM_OUT,
[SYS_BTN_M3] = USER_BIND_KIND_PAN,
#if RTC
/* Debug */
[SYS_BTN_FORWARD_SLASH] = USER_BIND_KIND_RESET_COLLIDER_GJK_STEPS,
[SYS_BTN_COMMA] = USER_BIND_KIND_DECR_COLLIDER_GJK_STEPS,
[SYS_BTN_PERIOD] = USER_BIND_KIND_INCR_COLLIDER_GJK_STEPS
#endif
};
/* ========================== *
* Startup
* ========================== */
INTERNAL APP_EXIT_CALLBACK_FUNC_DEF(user_shutdown);
INTERNAL SYS_THREAD_ENTRY_POINT_FUNC_DEF(user_thread_entry_point, arg);
INTERNAL SYS_THREAD_ENTRY_POINT_FUNC_DEF(user_local_sim_thread_entry_point, arg);
INTERNAL SYS_WINDOW_EVENT_CALLBACK_FUNC_DEF(window_event_callback, event);
struct user_startup_receipt user_startup(struct work_startup_receipt *work_sr,
struct renderer_startup_receipt *renderer_sr,
struct font_startup_receipt *font_sr,
struct sprite_startup_receipt *sprite_sr,
struct draw_startup_receipt *draw_sr,
struct asset_cache_startup_receipt *asset_cache_sr,
struct sound_startup_receipt *sound_sr,
struct mixer_startup_receipt *mixer_sr,
struct phys_startup_receipt *phys_sr,
struct host_startup_receipt *host_sr,
struct sim_startup_receipt *sim_sr,
struct string connect_address_str,
struct sys_window *window)
{
(UNUSED)work_sr;
(UNUSED)renderer_sr;
(UNUSED)font_sr;
(UNUSED)sprite_sr;
(UNUSED)draw_sr;
(UNUSED)asset_cache_sr;
(UNUSED)sound_sr;
(UNUSED)mixer_sr;
(UNUSED)phys_sr;
(UNUSED)host_sr;
(UNUSED)sim_sr;
G.arena = arena_alloc(GIGABYTE(64));
G.real_time_ns = sys_time_ns();
/* TODO: Remove this */
G.connect_address_str = string_copy(&G.arena, connect_address_str);
/* Initialize average dt to a reasonable value */
G.average_local_to_user_snapshot_publish_dt_ns = NS_FROM_SECONDS(1) / SIM_TICKS_PER_SECOND;
/* Sys events */
G.sys_events_mutex = sys_mutex_alloc();
G.sys_events_arena = arena_alloc(GIGABYTE(64));
/* User blend clients */
G.user_client_store = sim_client_store_alloc();
G.user_unblended_client = sim_client_alloc(G.user_client_store);
G.user_blended_client = sim_client_alloc(G.user_client_store);
G.ss_blended = sim_snapshot_nil();
/* Local to user client */
G.local_to_user_client_mutex = sys_mutex_alloc();
G.local_to_user_client_store = sim_client_store_alloc();
G.local_to_user_client = sim_client_alloc(G.local_to_user_client_store);
/* User sim control */
G.user_sim_cmd_mutex = sys_mutex_alloc();
G.world_to_ui_xf = XFORM_IDENT;
G.world_cmd_buffer = renderer_cmd_buffer_alloc();
G.ui_cmd_buffer = renderer_cmd_buffer_alloc();
G.final_cmd_buffer = renderer_cmd_buffer_alloc();
G.backbuffer_cmd_buffer = renderer_cmd_buffer_alloc();
G.window = window;
sys_window_register_event_callback(G.window, &window_event_callback);
G.local_sim_thread = sys_thread_alloc(&user_local_sim_thread_entry_point, G.local_sim_ctx, LIT("[P8] Local sim thread"));
G.debug_draw = true;
G.user_thread = sys_thread_alloc(&user_thread_entry_point, NULL, LIT("[P9] User thread"));
app_register_exit_callback(&user_shutdown);
return (struct user_startup_receipt) { 0 };
}
INTERNAL APP_EXIT_CALLBACK_FUNC_DEF(user_shutdown)
{
__prof;
sys_window_unregister_event_callback(G.window, &window_event_callback);
atomic_i32_eval_exchange(&G.user_thread_shutdown, true);
sys_thread_wait_release(&G.user_thread);
#if 0
if (G.local_sim_ctx) {
atomic_i32_eval_exchange(&G.local_sim_thread_shutdown, true);
sys_thread_wait_release(&G.local_sim_thread);
sim_ctx_release(G.local_sim_ctx);
}
#else
atomic_i32_eval_exchange(&G.local_sim_thread_shutdown, true);
sys_thread_wait_release(&G.local_sim_thread);
#endif
}
/* ========================== *
* Window -> user communication
* ========================== */
INTERNAL struct sys_event_array pop_sys_events(struct arena *arena)
{
struct sys_event_array array = ZI;
struct sys_lock lock = sys_mutex_lock_e(&G.sys_events_mutex);
{
struct sys_event *src_events = (struct sys_event *)G.sys_events_arena.base;
array.count = G.sys_events_arena.pos / sizeof(*src_events);
array.events = arena_push_array(arena, struct sys_event, array.count);
MEMCPY(array.events, src_events, array.count * sizeof(*src_events));
arena_reset(&G.sys_events_arena);
}
sys_mutex_unlock(&lock);
return array;
}
INTERNAL SYS_WINDOW_EVENT_CALLBACK_FUNC_DEF(window_event_callback, event)
{
struct sys_lock lock = sys_mutex_lock_e(&G.sys_events_mutex);
{
*arena_push(&G.sys_events_arena, struct sys_event) = event;
}
sys_mutex_unlock(&lock);
}
/* ========================== *
* Debug draw
* ========================== */
/* TODO: remove this (testing) */
INTERNAL void debug_draw_xform(struct xform xf, u32 color_x, u32 color_y)
{
f32 thickness = 2.f;
f32 arrowhead_len = 15.f;
struct v2 pos = xform_mul_v2(G.world_to_ui_xf, xf.og);
struct v2 x_ray = xform_basis_mul_v2(G.world_to_ui_xf, xform_get_right(xf));
struct v2 y_ray = xform_basis_mul_v2(G.world_to_ui_xf, xform_get_up(xf));
f32 ray_scale = 1;
x_ray = v2_mul(x_ray, ray_scale);
y_ray = v2_mul(y_ray, ray_scale);
draw_arrow_ray(G.ui_cmd_buffer, pos, x_ray, thickness, arrowhead_len, color_x);
draw_arrow_ray(G.ui_cmd_buffer, pos, y_ray, thickness, arrowhead_len, color_y);
//u32 color_quad = RGBA_32_F(0, 1, 1, 0.3);
//struct quad quad = quad_from_rect(RECT(0, 0, 1, -1));
//quad = xform_mul_quad(xf, quad_scale(quad, 0.075f));
//draw_quad(G.ui_cmd_buffer, quad, color);
}
/* TODO: remove this (testing) */
INTERNAL void debug_draw_movement(struct sim_ent *ent)
{
f32 thickness = 2.f;
f32 arrow_len = 15.f;
u32 color_vel = RGBA_32_F(1, 0.5, 0, 1);
struct xform xf = sim_ent_get_xform(ent);
struct v2 velocity = ent->linear_velocity;
struct v2 pos = xform_mul_v2(G.world_to_ui_xf, xf.og);
struct v2 vel_ray = xform_basis_mul_v2(G.world_to_ui_xf, velocity);
if (v2_len(vel_ray) > 0.00001) {
draw_arrow_ray(G.ui_cmd_buffer, pos, vel_ray, thickness, arrow_len, color_vel);
}
}
INTERNAL struct string get_ent_debug_text(struct arena *arena, struct sim_ent *ent)
{
struct temp_arena scratch = scratch_begin(arena);
struct sim_snapshot *ss = ent->ss;
const u8 hex[] = "0123456789abcdef";
struct string res = ZI;
res.text = arena_dry_push(arena, u8);
res.len += string_format(arena, LIT("[%F]"), FMT_UID(ent->id.uid)).len;
{
b32 transmitting = sim_ent_has_prop(ent, SIM_ENT_PROP_SYNC_SRC);
b32 receiving = sim_ent_has_prop(ent, SIM_ENT_PROP_SYNC_DST);
if (transmitting & receiving) {
res.len += string_copy(arena, LIT(" networked (sending & receiving)")).len;
} else if (transmitting) {
res.len += string_copy(arena, LIT(" networked (sending)")).len;
} else if (receiving) {
res.len += string_copy(arena, LIT(" networked (receiving)")).len;
} else {
res.len += string_copy(arena, LIT(" local")).len;
}
}
res.len += string_copy(arena, LIT("\n")).len;
res.len += string_format(arena, LIT("owner: [%F]\n"), FMT_UID(ent->owner.uid)).len;
res.len += string_copy(arena, LIT("\n")).len;
{
res.len += string_copy(arena, LIT("props: 0x")).len;
for (u64 chunk_index = ARRAY_COUNT(ent->props); chunk_index-- > 0;) {
u64 chunk = ent->props[chunk_index];
for (u64 part_index = 8; part_index-- > 0;) {
if ((chunk_index != (ARRAY_COUNT(ent->props) - 1)) || ((chunk_index * 64) + (part_index * 8)) <= SIM_ENT_PROP_COUNT) {
u8 part = (chunk >> (part_index * 8)) & 0xFF;
string_from_char(arena, hex[(part >> 4) & 0x0F]);
string_from_char(arena, hex[(part >> 0) & 0x0F]);
res.len += 2;
}
}
}
res.len += string_copy(arena, LIT("\n")).len;
}
if (!sim_ent_id_eq(ent->parent, SIM_ENT_ROOT_ID)) {
res.len += string_format(arena, LIT("parent: [%F]\n"), FMT_UID(ent->parent.uid)).len;
}
if (!sim_ent_id_is_nil(ent->next) || !sim_ent_id_is_nil(ent->prev)) {
res.len += string_format(arena, LIT("prev: [%F]\n"), FMT_UID(ent->prev.uid)).len;
res.len += string_format(arena, LIT("next: [%F]\n"), FMT_UID(ent->next.uid)).len;
}
res.len += string_copy(arena, LIT("\n")).len;
/* Pos */
struct xform xf = sim_ent_get_xform(ent);
struct v2 linear_velocity = ent->linear_velocity;
f32 angular_velocity = ent->angular_velocity;
res.len += string_format(arena, LIT("pos: (%F, %F)\n"), FMT_FLOAT_P(xf.og.x, 3), FMT_FLOAT_P(xf.og.y, 3)).len;
res.len += string_format(arena, LIT("linear velocity: (%F, %F)\n"), FMT_FLOAT_P(linear_velocity.x, 3), FMT_FLOAT_P(linear_velocity.y, 3)).len;
res.len += string_format(arena, LIT("angular velocity: %F\n"), FMT_FLOAT_P(angular_velocity, 3)).len;
/* Children */
if (!sim_ent_id_is_nil(ent->first) || !sim_ent_id_is_nil(ent->last)) {
struct sim_ent *child = sim_ent_from_id(ss, ent->first);
if (!sim_ent_id_eq(ent->first, ent->last) || !child->valid) {
res.len += string_format(arena, LIT("first child: [%F]\n"), FMT_UID(ent->first.uid)).len;
res.len += string_format(arena, LIT("last child: [%F]\n"), FMT_UID(ent->last.uid)).len;
}
while (child->valid) {
res.len += string_copy(arena, LIT("\n---------------------------------\n")).len;
res.len += string_copy(arena, LIT("CHILD\n")).len;
struct string child_text = get_ent_debug_text(scratch.arena, child);
res.len += string_indent(arena, child_text, 4).len;
child = sim_ent_from_id(ss, child->next);
}
}
scratch_end(scratch);
return res;
}
/* ========================== *
* Sort entities
* ========================== */
INTERNAL SORT_COMPARE_FUNC_DEF(ent_draw_order_cmp, arg_a, arg_b, udata)
{
(UNUSED)udata;
struct sim_ent *a = *(struct sim_ent **)arg_a;
struct sim_ent *b = *(struct sim_ent **)arg_b;
i32 res = 0;
if (res == 0) {
/* Sort by layer */
i32 a_cmp = a->layer;
i32 b_cmp = b->layer;
res = (a_cmp < b_cmp) - (a_cmp > b_cmp);
}
if (res == 0) {
/* Sort by sprite */
u64 a_cmp = a->sprite.hash;
u64 b_cmp = b->sprite.hash;
res = (a_cmp < b_cmp) - (a_cmp > b_cmp);
}
if (res == 0) {
/* Sort by activation */
u64 a_cmp = a->activation_tick;
u64 b_cmp = b->activation_tick;
res = (a_cmp < b_cmp) - (a_cmp > b_cmp);
}
return res;
}
/* ========================== *
* Update
* ========================== */
INTERNAL void user_update(void)
{
struct temp_arena scratch = scratch_begin_no_conflict();
/* ========================== *
* Begin frame
* ========================== */
G.real_dt_ns = sys_time_ns() - G.real_time_ns;
G.real_time_ns += G.real_dt_ns;
G.screen_size = sys_window_get_size(G.window);
struct sprite_scope *sprite_frame_scope = sprite_scope_begin();
/* ========================== *
* Pull latest local sim snapshot
* ========================== */
{
struct sys_lock lock = sys_mutex_lock_e(&G.local_to_user_client_mutex);
u64 old_last_tick = G.user_unblended_client->last_tick;
u64 last_tick = G.local_to_user_client->last_tick;
if (last_tick > old_last_tick) {
struct sim_snapshot *src = sim_snapshot_from_tick(G.local_to_user_client, last_tick);
sim_snapshot_alloc(G.user_unblended_client, src, src->tick);
G.last_local_to_user_snapshot_published_at_ns = G.local_to_user_client_publish_time_ns;
G.average_local_to_user_snapshot_publish_dt_ns -= G.average_local_to_user_snapshot_publish_dt_ns / 50;
G.average_local_to_user_snapshot_publish_dt_ns += G.local_to_user_client_publish_dt_ns / 50;
}
sys_mutex_unlock(&lock);
}
/* ========================== *
* Create user world from blended snapshots
* ========================== */
{
/* How along are we between sim ticks (0 = start of tick, 1 = end of tick) */
f64 tick_progress = 0;
i64 next_tick_expected_ns = G.last_local_to_user_snapshot_published_at_ns + G.average_local_to_user_snapshot_publish_dt_ns;
if (next_tick_expected_ns > G.last_local_to_user_snapshot_published_at_ns) {
tick_progress = (f64)(G.real_time_ns - G.last_local_to_user_snapshot_published_at_ns) / (f64)(next_tick_expected_ns - G.last_local_to_user_snapshot_published_at_ns);
}
/* Predict local sim time based on average snapshot publish dt. */
struct sim_snapshot *newest_snapshot = sim_snapshot_from_tick(G.user_unblended_client, G.user_unblended_client->last_tick);
G.local_sim_last_known_time_ns = newest_snapshot->sim_time_ns;
G.local_sim_last_known_tick = newest_snapshot->tick;
G.local_sim_predicted_time_ns = newest_snapshot->sim_time_ns + (newest_snapshot->sim_dt_ns * tick_progress);
#if USER_INTERP_ENABLED
/* Determine render time */
G.render_time_target_ns = G.local_sim_predicted_time_ns - (USER_INTERP_RATIO * G.average_local_to_user_snapshot_publish_dt_ns);
if (G.average_local_to_user_snapshot_publish_dt_ns > 0) {
/* Increment render time based on average publish dt */
f64 sim_publish_timescale = (f64)newest_snapshot->sim_dt_ns / (f64)G.average_local_to_user_snapshot_publish_dt_ns;
G.render_time_ns += G.real_dt_ns * sim_publish_timescale;
}
i64 render_time_target_diff_ns = G.render_time_target_ns - G.render_time_ns;
if (render_time_target_diff_ns > NS_FROM_SECONDS(0.010) || render_time_target_diff_ns < NS_FROM_SECONDS(-0.005)) {
/* Snap render time if it gets too out of sync with target render time */
G.render_time_ns = G.render_time_target_ns;
}
/* Get two snapshots nearest to render time */
struct sim_snapshot *left_snapshot = sim_snapshot_nil();
struct sim_snapshot *right_snapshot = newest_snapshot;
{
struct sim_snapshot *ss = sim_snapshot_from_tick(G.user_unblended_client, G.user_unblended_client->first_tick);
while (ss->valid) {
u64 next_tick = ss->next_tick;
i64 ss_time_ns = ss->sim_time_ns;
if (ss_time_ns < G.render_time_ns && ss_time_ns > left_snapshot->sim_time_ns) {
left_snapshot = ss;
}
if (ss_time_ns > G.render_time_ns && ss_time_ns < right_snapshot->sim_time_ns) {
right_snapshot = ss;
}
ss = sim_snapshot_from_tick(G.user_unblended_client, next_tick);
}
}
/* Create world from blended snapshots */
if (left_snapshot->valid && right_snapshot->valid) {
f64 blend = (f64)(G.render_time_ns - left_snapshot->sim_time_ns) / (f64)(right_snapshot->sim_time_ns - left_snapshot->sim_time_ns);
G.ss_blended = sim_snapshot_alloc_from_lerp(G.user_blended_client, left_snapshot, right_snapshot, blend);
} else if (left_snapshot->valid) {
G.ss_blended = sim_snapshot_alloc(G.user_blended_client, left_snapshot, left_snapshot->tick);
} else if (right_snapshot->valid) {
G.ss_blended = sim_snapshot_alloc(G.user_blended_client, right_snapshot, right_snapshot->tick);
}
#else
/* Interp disabled, just copy latest snapshot */
G.render_time_target_ns = newest_snapshot->sim_time_ns;
G.render_time_ns = newest_snapshot->sim_time_ns;
if (G.ss_blended->tick != newest_snapshot->tick) {
if (G.ss_blended->valid) {
sim_snapshot_release(G.ss_blended);
}
G.ss_blended = sim_snapshot_alloc(G.user_blended_client, newest_snapshot, newest_snapshot->tick);
}
#endif
/* Release unneeded unblended sim snapshots */
if (left_snapshot->tick > 0) {
sim_snapshot_release_ticks_in_range(G.user_unblended_client, 0, left_snapshot->tick - 1);
}
/* Release unneeded blended snapshots */
if (G.ss_blended->tick > 0) {
sim_snapshot_release_ticks_in_range(G.user_blended_client, 0, G.ss_blended->tick - 1);
sim_snapshot_release_ticks_in_range(G.user_blended_client, G.ss_blended->tick + 1, U64_MAX);
}
}
/* ========================== *
* Process sys events into user bind state
* ========================== */
{
struct sys_event_array events = pop_sys_events(scratch.arena);
/* Reset bind pressed / released states */
for (u32 i = 0; i < ARRAY_COUNT(G.bind_states); ++i) {
G.bind_states[i] = (struct bind_state) {
.is_held = G.bind_states[i].is_held
};
}
for (u64 ent_index = 0; ent_index < events.count; ++ent_index) {
struct sys_event *event = &events.events[ent_index];
if (event->kind == SYS_EVENT_KIND_QUIT) {
app_exit();
}
if (event->kind == SYS_EVENT_KIND_BUTTON_UP) {
#if DEVELOPER
/* Escape quit */
if (event->button == SYS_BTN_ESC) {
app_exit();
}
#endif
}
/* Update mouse pos */
if (event->kind == SYS_EVENT_KIND_CURSOR_MOVE) {
G.screen_cursor = event->cursor_position;
}
/* Update bind states */
if ((event->kind == SYS_EVENT_KIND_BUTTON_DOWN || event->kind == SYS_EVENT_KIND_BUTTON_UP)) {
enum sys_btn button = event->button;
button = button >= SYS_BTN_COUNT ? SYS_BTN_NONE : button;
enum user_bind_kind bind = g_binds[button];
if (bind) {
b32 pressed = event->kind == SYS_EVENT_KIND_BUTTON_DOWN;
#if 0
b32 out_of_bounds = button >= SYS_BTN_M1 && button <= SYS_BTN_M5 &&
(G.ui_cursor.x < 0 ||
G.ui_cursor.y < 0 ||
G.ui_cursor.x > G.ui_size.x ||
G.ui_cursor.y > G.ui_size.y);
#else
b32 out_of_bounds = false;
#endif
G.bind_states[bind].is_held = pressed && !out_of_bounds;
if (pressed) {
if (!out_of_bounds) {
++G.bind_states[bind].num_presses_and_repeats;
if (!event->is_repeat) {
++G.bind_states[bind].num_presses;
}
}
} else {
++G.bind_states[bind].num_releases;
}
}
}
}
}
/* ========================== *
* Find local entities
* ========================== */
struct sim_ent *local_player = sim_ent_from_id(G.ss_blended, G.ss_blended->local_player);
struct sim_ent *local_control = sim_ent_from_id(G.ss_blended, local_player->player_control_ent);
struct sim_ent *local_camera = sim_ent_from_id(G.ss_blended, local_player->player_camera_ent);
/* ========================== *
* Find hovered entity
* ========================== */
struct sim_ent *hovered_ent = sim_ent_nil();
{
struct xform mouse_xf = xform_from_pos(G.world_cursor);
struct collider_shape mouse_shape = ZI;
mouse_shape.points[0] = V2(0, 0);
mouse_shape.count = 1;
mouse_shape.radius = 0.01;
for (u64 ent_index = 0; ent_index < G.ss_blended->num_ents_reserved; ++ent_index) {
struct sim_ent *ent = &G.ss_blended->ents[ent_index];
if (!sim_ent_is_valid_and_active(ent)) continue;
if (!ent->is_top) continue;
struct collider_shape ent_collider = ent->local_collider;
if (ent_collider.count > 0) {
/* TODO: Can just use boolean GJK */
struct xform ent_xf = sim_ent_get_xform(ent);
struct collider_collision_points_result res = collider_collision_points(&ent_collider, &mouse_shape, ent_xf, mouse_xf);
if (res.num_points > 0) {
hovered_ent = ent;
break;
}
}
}
}
/* ========================== *
* Update user state from binds
* ========================== */
/* Test fullscreen */
{
struct bind_state state = G.bind_states[USER_BIND_KIND_FULLSCREEN];
if (state.num_presses) {
struct sys_window_settings settings = sys_window_get_settings(G.window);
settings.flags ^= SYS_WINDOW_SETTINGS_FLAG_FULLSCREEN;
sys_window_update_settings(G.window, &settings);
}
}
if (G.bind_states[USER_BIND_KIND_DEBUG_DRAW].num_presses > 0) {
G.debug_draw = !G.debug_draw;
}
if (G.bind_states[USER_BIND_KIND_DEBUG_CAMERA].num_presses > 0) {
G.debug_camera = !G.debug_camera;
}
{
if (G.bind_states[USER_BIND_KIND_DEBUG_FOLLOW].num_presses > 0) {
if (sim_ent_id_is_nil(G.debug_following)) {
G.debug_following = hovered_ent->id;
} else {
G.debug_following = SIM_ENT_NIL_ID;
}
}
if (!sim_ent_id_is_nil(G.debug_following)) {
struct sim_ent *follow_ent = sim_ent_from_id(G.ss_blended, G.debug_following);
struct sim_ent *follow_camera = sim_ent_nil();
for (u64 i = 0; i < G.ss_blended->num_ents_reserved; ++i) {
struct sim_ent *ent = &G.ss_blended->ents[i];
struct sim_ent *ent_camera_follow = sim_ent_from_id(G.ss_blended, ent->camera_follow);
if (ent_camera_follow->valid && ent_camera_follow == follow_ent) {
follow_camera = ent;
break;
}
}
if (follow_camera->valid) {
local_camera = follow_camera;
} else {
G.debug_following = SIM_ENT_NIL_ID;
}
}
}
/* ========================== *
* Apply shake
* ========================== */
for (u64 ent_index = 0; ent_index < G.ss_blended->num_ents_reserved; ++ent_index) {
struct sim_ent *ent = &G.ss_blended->ents[ent_index];
if (!sim_ent_is_valid_and_active(ent)) continue;
/* How much time between camera shakes */
i64 frequency_ns = NS_FROM_SECONDS(0.01f);
f32 shake = ent->shake;
if (shake > 0) {
u64 angle_seed0 = ent->id.uid.lo + (u64)(G.ss_blended->sim_time_ns / frequency_ns);
u64 angle_seed1 = angle_seed0 + 1;
f32 angle0 = rand_f64_from_seed(angle_seed0, 0, TAU);
f32 angle1 = rand_f64_from_seed(angle_seed1, 0, TAU);
struct v2 vec0 = v2_with_len(v2_from_angle(angle0), shake);
/* NOTE: vec1 not completely accurate since shake can change between frames, it's just a prediction */
struct v2 vec1 = v2_with_len(v2_from_angle(angle1), shake);
/* TODO: Cubic interp? */
f32 blend = (f32)(G.ss_blended->sim_time_ns % frequency_ns) / (f32)frequency_ns;
struct v2 vec = v2_lerp(vec0, vec1, blend);
struct xform xf = sim_ent_get_xform(ent);
xf.og = v2_add(xf.og, v2_mul(vec, shake));
sim_ent_set_xform(ent, xf);
}
}
/* ========================== *
* Update ui from camera
* ========================== */
/* Calculate ui dimensions */
if (G.debug_camera) {
G.ui_size = G.screen_size;
G.ui_screen_offset = V2(0, 0);
} else {
/* Determine ui size by camera & window dimensions */
f32 aspect_ratio = 1.0;
{
struct xform quad_xf = xform_mul(sim_ent_get_xform(local_camera), local_camera->camera_quad_xform);
struct v2 camera_size = xform_get_scale(quad_xf);
if (!v2_is_zero(camera_size)) {
aspect_ratio = camera_size.x / camera_size.y;
}
}
f32 width = G.screen_size.x;
f32 height = G.screen_size.y;
if (width / height > aspect_ratio) {
width = height * aspect_ratio;
} else {
height = math_ceil(width / aspect_ratio);
}
G.ui_size = V2(width, height);
/* Center ui in window */
f32 x = 0;
f32 y = 0;
x = math_round(G.screen_size.x / 2 - width / 2);
y = math_round(G.screen_size.y / 2 - height / 2);
G.ui_screen_offset = V2(x, y);
}
G.ui_center = v2_mul(G.ui_size, 0.5);
G.ui_cursor = v2_sub(G.screen_cursor, G.ui_screen_offset);
/* ========================== *
* Update view from camera
* ========================== */
if (G.debug_camera) {
G.world_to_ui_xf = xform_basis_with_rotation_world(G.world_to_ui_xf, 0);
struct v2 world_cursor = xform_invert_mul_v2(G.world_to_ui_xf, G.ui_cursor);
/* Pan view */
if (G.bind_states[USER_BIND_KIND_PAN].is_held) {
if (!G.debug_camera_panning) {
G.debug_camera_pan_start = world_cursor;
G.debug_camera_panning = true;
}
struct v2 offset = v2_neg(v2_sub(G.debug_camera_pan_start, world_cursor));
G.world_to_ui_xf = xform_translated(G.world_to_ui_xf, offset);
world_cursor = xform_invert_mul_v2(G.world_to_ui_xf, G.ui_cursor);
G.debug_camera_pan_start = world_cursor;
} else {
G.debug_camera_panning = false;
}
/* Zoom view */
i32 input_zooms = G.bind_states[USER_BIND_KIND_ZOOM_IN].num_presses - G.bind_states[USER_BIND_KIND_ZOOM_OUT].num_presses;
if (input_zooms != 0) {
/* Zoom to cursor */
f32 zoom_rate = 2;
f32 zoom = math_pow(zoom_rate, input_zooms);
G.world_to_ui_xf = xform_translated(G.world_to_ui_xf, world_cursor);
G.world_to_ui_xf = xform_scaled(G.world_to_ui_xf, V2(zoom, zoom));
G.world_to_ui_xf = xform_translated(G.world_to_ui_xf, v2_neg(world_cursor));
}
} else {
struct xform xf = sim_ent_get_xform(local_camera);
struct v2 center = xf.og;
f32 rot = xform_get_rotation(xf);
/* Scale view into viewport based on camera size */
struct v2 size = G.ui_size;
{
struct xform quad_xf = xform_mul(xf, local_camera->camera_quad_xform);
struct v2 camera_size = xform_get_scale(quad_xf);
if (!v2_is_zero(camera_size)) {
size = v2_div_v2(size, camera_size);
}
}
f32 scale_ui = min_f32(size.x, size.y);
struct trs trs = TRS(.t = v2_sub(G.ui_center, center), .r = rot, .s = V2(scale_ui, scale_ui));
struct v2 pivot = center;
G.world_to_ui_xf = XFORM_IDENT;
G.world_to_ui_xf = xform_translated(G.world_to_ui_xf, pivot);
G.world_to_ui_xf = xform_translated(G.world_to_ui_xf, trs.t);
G.world_to_ui_xf = xform_rotated(G.world_to_ui_xf, trs.r);
G.world_to_ui_xf = xform_scaled(G.world_to_ui_xf, trs.s);
G.world_to_ui_xf = xform_translated(G.world_to_ui_xf, v2_neg(pivot));
}
G.world_cursor = xform_invert_mul_v2(G.world_to_ui_xf, G.ui_cursor);
/* ========================== *
* Update listener from view
* ========================== */
{
struct v2 up = V2(0, -1);
struct v2 listener_pos = xform_invert_mul_v2(G.world_to_ui_xf, G.ui_center);
struct v2 listener_dir = v2_norm(xform_basis_invert_mul_v2(G.world_to_ui_xf, up));
mixer_set_listener(listener_pos, listener_dir);
}
/* ========================== *
* Draw test grid
* ========================== */
{
f32 thickness = 2;
u32 color = RGBA_32(0x3f, 0x3f, 0x3f, 0xFF);
struct v2 offset = v2_neg(xform_mul_v2(G.world_to_ui_xf, V2(0, 0)));
f32 spacing = xform_get_scale(G.world_to_ui_xf).x;
struct v2 pos = xform_invert_mul_v2(G.world_to_ui_xf, V2(0, 0));
struct v2 size = xform_basis_invert_mul_v2(G.world_to_ui_xf, G.ui_size);
draw_grid(G.world_cmd_buffer, RECT_FROM_V2(pos, size), color, thickness, spacing, offset);
}
#if 0
/* ========================== *
* Alloc / release tile cache entries
* ========================== */
/* Alloc entries from new sim chunks */
for (u64 ent_index = 0; ent_index < G.ss_blended->num_ents_reserved; ++ent_index) {
struct sim_ent *chunk_ent = &G.ss_blended->ents[ent_index];
if (sim_ent_is_valid_and_active(chunk_ent) && sim_ent_has_prop(chunk_ent, SIM_ENT_PROP_TILE_CHUNK)) {
struct user_tile_cache_entry *entry = user_tile_cache_entry_from_chunk_pos(chunk_ent->tile_chunk_pos);
if (!entry->valid) {
entry = user_tile_cache_entry_alloc(chunk_ent->tile_chunk_pos);
}
}
}
/* Release entries with invalid sim chunks */
for (u64 entry_index = 0; entry_index < G.tile_cache.num_reserved_entries; ++entry_index) {
struct tile_cache_entry *entry = &G.tile_cache.entries[entry_index];
if (entry->valid) {
struct sim_ent *chunk_ent = sim_ent_from_chunk_pos(entry->pos);
if (!chunk_ent->valid) {
user_tile_cache_entry_release(entry);
}
}
}
/* ========================== *
* Draw dirty tile cache entries
* ========================== */
for (u64 entry_index = 0; entry_index < G.tile_cache.num_reserved_entries; ++entry_index) {
struct tile_cache_entry *entry = &G.tile_cache.entries[entry_index];
if (entry->valid) {
struct v2i32 chunk_pos = entry->pos;
struct sim_ent *chunk_ent = sim_ent_from_chunk_pos(chunk_pos);
if (entry->applied_dirty_gen != chunk_ent->dirty_gen) {
entry->applied_dirty_gen = chunk_ent->dirty_gen;
/* TODO: Autotiling */
struct string data = sim_ent_get_chunk_tile_data(chunk_ent);
u64 tile_count = data.len;
if (tile_count == SIM_TILES_PER_CHUNK_SQRT * SIM_TILES_PER_CHUNK_SQRT) {
for (u64 y_in_chunk = 0; y_in_chunk < SIM_TILES_PER_CHUNK_SQRT; ++y_in_chunk) {
for (u64 x_in_chunk = 0; x_in_chunk < SIM_TILES_PER_CHUNK_SQRT; ++x_in_chunk) {
}
}
} else {
/* TODO: Clear gpu buffer if it exists */
}
}
}
}
#if 0
for (u64 entry_index = 0; entry_index < G.tile_cache.num_reserved_entries; ++entry_index) {
struct tile_cache_entry *entry = &G.tile_cache.entries[entry_index];
if (entry->valid) {
struct v2i32 chunk_pos = entry->pos;
struct sim_ent *chunk_ent = sim_ent_from_chunk_pos(chunk_pos);
if (entry->applied_dirty_gen != chunk_ent->dirty_gen) {
entry->applied_dirty_gen = chunk_ent->dirty_gen;
/* Retreive surrounding chunk info since we're auto-tiling
* [TL] [T] [TR]
* [L ] X [R ]
* [BL] [B] [BR]
*/
struct v2i32 chunk_pos_tl = V2I32(chunk_pos.x - 1, chunk_pos.y - 1);
struct v2i32 chunk_pos_t = V2I32(chunk_pos.x, chunk_pos.y - 1);
struct v2i32 chunk_pos_tr = V2I32(chunk_pos.x + 1, chunk_pos.y - 1);
struct v2i32 chunk_pos_l = V2I32(chunk_pos.x - 1, chunk_pos.y);
struct v2i32 chunk_pos_r = V2I32(chunk_pos.x + 1, chunk_pos.y);
struct v2i32 chunk_pos_bl = V2I32(chunk_pos.x - 1, chunk_pos.y + 1);
struct v2i32 chunk_pos_b = V2I32(chunk_pos.x, chunk_pos.y + 1);
struct v2i32 chunk_pos_br = V2I32(chunk_pos.x + 1, chunk_pos.y + 1);
struct sim_ent *chunk_ent_tl = sim_ent_from_chunk_pos(chunk_pos_tl);
struct sim_ent *chunk_ent_t = sim_ent_from_chunk_pos(chunk_pos_t);
struct sim_ent *chunk_ent_tr = sim_ent_from_chunk_pos(chunk_pos_tr);
struct sim_ent *chunk_ent_l = sim_ent_from_chunk_pos(chunk_pos_l);
struct sim_ent *chunk_ent_r = sim_ent_from_chunk_pos(chunk_pos_r);
struct sim_ent *chunk_ent_bl = sim_ent_from_chunk_pos(chunk_pos_bl);
struct sim_ent *chunk_ent_b = sim_ent_from_chunk_pos(chunk_pos_b);
struct sim_ent *chunk_ent_br = sim_ent_from_chunk_pos(chunk_pos_br);
struct string data = sim_ent_get_chunk_tile_data(chunk_ent);
//for (u64 x = 0; x <
}
}
}
#endif
#endif
/* ========================== *
* Sort drawable entities
* ========================== */
struct sim_ent **sorted = arena_dry_push(scratch.arena, struct sim_ent *);
u64 sorted_count = 0;
{
/* Copy valid entities */
{
__profscope(copy_sprites_for_sorting);
for (u64 ent_index = 0; ent_index < G.ss_blended->num_ents_reserved; ++ent_index) {
struct sim_ent *ent = &G.ss_blended->ents[ent_index];
if (sim_ent_is_valid_and_active(ent)) {
*arena_push(scratch.arena, struct sim_ent *) = ent;
++sorted_count;
}
}
}
/* Sort */
{
__profscope(sort_sprites);
merge_sort(sorted, sorted_count, sizeof(*sorted), ent_draw_order_cmp, NULL);
}
}
/* ========================== *
* Draw entities
* ========================== */
{
__profscope(draw_entities);
for (u64 sorted_index = 0; sorted_index < sorted_count; ++sorted_index) {
struct sim_ent *ent = sorted[sorted_index];
if (!sim_ent_is_valid_and_active(ent)) continue;
//if (sprite_tag_is_nil(ent->sprite)) continue;
struct sprite_tag sprite = ent->sprite;
struct sim_ent *parent = sim_ent_from_id(G.ss_blended, ent->parent);
struct xform xf = sim_ent_get_xform(ent);
struct xform parent_xf = sim_ent_get_xform(parent);
b32 skip_debug_draw = !G.debug_camera && ent == local_camera;
b32 skip_debug_draw_transform = sim_ent_has_prop(ent, SIM_ENT_PROP_CAMERA);
skip_debug_draw_transform = true;
struct xform sprite_xform = xf;
/* Draw tracer */
if (sim_ent_has_prop(ent, SIM_ENT_PROP_TRACER)) {
struct v2 velocity = ent->tracer_start_velocity;
struct v2 a = ent->tracer_start;
struct v2 b = xf.og;
struct v2 c = ent->tracer_gradient_start;
struct v2 d = ent->tracer_gradient_end;
struct v2 vcd = v2_sub(d, c);
struct v2 vca = v2_sub(a, c);
struct v2 vdb = v2_sub(b, d);
struct v2 vdc = v2_neg(vcd);
f32 opacity_a = 1;
f32 opacity_b = 1;
if (v2_len_sq(vcd) != 0) {
if (v2_dot(velocity, vca) <= 0) {
a = c;
opacity_a = 0;
} else {
opacity_a = v2_dot(vcd, vca) / v2_len_sq(vcd);
}
opacity_a = clamp_f32(opacity_a, 0, 1);
opacity_b = clamp_f32(1.f - (v2_dot(vdc, vdb) / v2_len_sq(vdc)), 0, 1);
}
f32 thickness = 0.01f;
u32 color_start = RGBA_32_F(1, 0.5, 0, opacity_a);
u32 color_end = RGBA_32_F(1, 0.8, 0.4, opacity_b);
if (opacity_b > 0.99f) {
draw_circle(G.world_cmd_buffer, b, thickness / 2, color_end, 20);
}
draw_gradient_line(G.world_cmd_buffer, a, b, thickness, color_start, color_end);
}
/* Draw sprite */
//if ((false)) {
if (!sprite_tag_is_nil(sprite)) {
/* Calculate sprite xform */
sprite_xform = xform_mul(xf, ent->sprite_local_xform);
/* Async load */
struct sprite_sheet *sheet = sprite_sheet_from_tag_async(sprite_frame_scope, sprite);
struct sprite_texture *texture = sprite_texture_from_tag_async(sprite_frame_scope, sprite);
(UNUSED)texture;
/* TODO: Fade in placeholder if texture isn't loaded */
if (sheet->loaded) {
struct sprite_sheet_frame frame = sprite_sheet_get_frame(sheet, ent->animation_frame);
struct quad quad = xform_mul_quad(sprite_xform, QUAD_UNIT_SQUARE_CENTERED);
struct draw_texture_params params = DRAW_TEXTURE_PARAMS(.sprite = sprite, .tint = ent->sprite_tint, .clip = frame.clip);
draw_quad_texture(G.world_cmd_buffer, params, quad);
}
}
/* Debug draw entity info */
if (G.debug_draw && !skip_debug_draw) {
struct temp_arena temp = arena_temp_begin(scratch.arena);
if (sim_ent_has_prop(ent, SIM_ENT_PROP_PHYSICAL_DYNAMIC) || sim_ent_has_prop(ent, SIM_ENT_PROP_PHYSICAL_KINEMATIC)) {
debug_draw_movement(ent);
}
/* Draw xform */
if (!skip_debug_draw_transform) {
u32 color_x = RGBA_32_F(1, 0, 0, 0.5);
u32 color_y = RGBA_32_F(0, 1, 0, 0.5);
debug_draw_xform(xf, color_x, color_y);
}
/* Draw AABB */
if (ent->local_collider.count > 0) {
struct aabb aabb = collider_aabb_from_collider(&ent->local_collider, xf);
f32 thickness = 1;
u32 color = RGBA_32_F(1, 0, 1, 0.5);
struct quad quad = quad_from_aabb(aabb);
quad = xform_mul_quad(G.world_to_ui_xf, quad);
draw_quad_line(G.ui_cmd_buffer, quad, thickness, color);
}
/* Draw focus arrow */
if (ent == local_control || sim_ent_id_eq(ent->id, G.debug_following)) {
struct sprite_sheet *sheet = sprite_sheet_from_tag_async(sprite_frame_scope, ent->sprite);
struct sprite_sheet_slice slice = sprite_sheet_get_slice(sheet, LIT("attach.wep"), ent->animation_frame);
struct v2 start = xform_mul_v2(sprite_xform, slice.center);
start = xform_mul_v2(G.world_to_ui_xf, start);
struct v2 end = v2_add(xf.og, ent->control.focus);
end = xform_mul_v2(G.world_to_ui_xf, end);
draw_arrow_line(G.ui_cmd_buffer, start, end, 3, 10, RGBA_32_F(1, 1, 1, 0.5));
}
#if 0
/* Draw slices */
if (!sprite_tag_is_nil(ent->sprite)) {
struct sprite_sheet *sheet = sprite_sheet_from_tag_async(sprite_frame_scope, sprite);
u32 quad_color = RGBA_32_F(1, 0, 0.5, 1);
u32 point_color = RGBA_32_F(1, 0, 0, 1);
u32 ray_color = RGBA_32_F(1, 0, 0.5, 1);
if (colliding) {
quad_color = RGBA_32_F(1, 1, 1, 1);
}
for (u64 i = 0; i < sheet->slice_groups_count; ++i) {
struct sprite_sheet_slice_group *group = &sheet->slice_groups[i];
if (string_ends_with(group->name, LIT(".ray"))) continue;
for (u32 j = 0; j < group->per_frame_count; ++j) {
struct sprite_sheet_slice slice = group->frame_slices[(ent->animation_frame * group->per_frame_count) + j];
struct v2 center = xform_mul_v2(sprite_xform, slice.center);
center = xform_mul_v2(G.world_to_ui_xf, center);
if (!slice.has_ray) {
struct quad quad = quad_from_rect(slice.rect);
quad = xform_mul_quad(sprite_xform, quad);
quad = xform_mul_quad(G.world_to_ui_xf, quad);
draw_quad_line(G.ui_cmd_buffer, quad, 2, quad_color);
}
draw_circle(G.ui_cmd_buffer, center, 3, point_color, 20);
if (slice.has_ray) {
struct v2 ray = xform_basis_mul_v2(sprite_xform, slice.dir);
ray = xform_basis_mul_v2(G.world_to_ui_xf, ray);
ray = v2_with_len(ray, 25);
draw_arrow_ray(G.ui_cmd_buffer, center, ray, 2, 10, ray_color);
}
}
}
}
#endif
/* Draw collider */
if (sim_ent_has_prop(ent, SIM_ENT_PROP_PHYSICAL_DYNAMIC)) {
struct collider_shape collider = ent->local_collider;
u32 color = RGBA_32_F(1, 1, 0, 0.5);
f32 thickness = 2;
{
/* Draw collider using support points */
u32 detail = 32;
draw_collider_line(G.ui_cmd_buffer, G.world_to_ui_xf, collider, xf, thickness, color, detail);
}
{
/* Draw collider shape points */
for (u32 i = 0; i < collider.count; ++i) {
struct v2 p = xform_mul_v2(xform_mul(G.world_to_ui_xf, xf), collider.points[i]);
draw_circle(G.ui_cmd_buffer, p, 3, COLOR_BLUE, 10);
}
}
if (collider.count == 1 && collider.radius > 0) {
/* Draw upwards line for circle */
struct v2 start = xf.og;
struct v2 end = collider_get_support_point(&collider, xf, v2_neg(xf.by)).p;
start = xform_mul_v2(G.world_to_ui_xf, start);
end = xform_mul_v2(G.world_to_ui_xf, end);
draw_line(G.ui_cmd_buffer, start, end, thickness, color);
}
#if 0
/* Draw support point at focus dir */
{
struct v2 p = collider_support_point(&collider, xf, ent->control.focus);
p = xform_mul_v2(G.world_to_ui_xf, p);
draw_circle(G.ui_cmd_buffer, p, 3, COLOR_RED, 10);
}
#endif
}
/* Draw contact constraint */
if (sim_ent_has_prop(ent, SIM_ENT_PROP_CONTACT_CONSTRAINT)) {
struct phys_contact_constraint *data = &ent->contact_constraint_data;
struct sim_ent *e0 = sim_ent_from_id(G.ss_blended, data->e0);
struct sim_ent *e1 = sim_ent_from_id(G.ss_blended, data->e1);
(UNUSED)e0;
(UNUSED)e1;
#if 1
#if DEVELOPER
/* Draw contact points */
{
f32 radius = 5;
for (u32 i = 0; i < data->num_points; ++i) {
struct phys_contact_point point = data->points[i];
struct v2 dbg_pt = point.dbg_pt;
/* Draw point */
{
//u32 color = contact.persisted ? RGBA_32_F(1, 1, 0, 0.50) : RGBA_32_F(1, 0, 0, 0.50);
u32 color = RGBA_32_F(1, 1, 0, 0.50);
//struct v2 point = xform_mul_v2(e0_xf, contact.p0_local);
//struct v2 point = contact.p0_initial_world;
draw_circle(G.ui_cmd_buffer, xform_mul_v2(G.world_to_ui_xf, dbg_pt), radius, color, 10);
}
/* Draw normal */
{
u32 color = COLOR_WHITE;
f32 len = 0.1f;
f32 arrow_thickness = 2;
f32 arrow_height = 5;
struct v2 start = xform_mul_v2(G.world_to_ui_xf, dbg_pt);
struct v2 end = xform_mul_v2(G.world_to_ui_xf, v2_add(dbg_pt, v2_mul(v2_norm(data->normal), len)));
draw_arrow_line(G.ui_cmd_buffer, start, end, arrow_thickness, arrow_height, color);
}
#if 0
/* Draw contact info */
{
struct font *disp_font = font_load_async(LIT("res/fonts/fixedsys.ttf"), 12.0f);
if (disp_font) {
f32 offset_px = 10;
struct string fmt = LIT(
"e0 index: %F\n"
"e1 index: %F\n"
"id: 0x%F\n"
"impulse (n): %F\n"
"impulse (t): %F\n"
"separation: %F\n"
"normal: (%F, %F)\n"
"num contacts: %F"
);
struct string text = string_format(temp.arena, fmt,
FMT_UINT(e0->handle.idx),
FMT_UINT(e1->handle.idx),
FMT_HEX(point.id),
FMT_FLOAT_P(point.normal_impulse, 3),
FMT_FLOAT_P(point.tangent_impulse, 3),
FMT_FLOAT_P(point.starting_separation, 6),
FMT_FLOAT_P(data->normal.x, 6), FMT_FLOAT_P(data->normal.y, 6),
FMT_UINT(data->num_points));
draw_text(G.ui_cmd_buffer, disp_font, v2_add(v2_round(xform_mul_v2(G.world_to_ui_xf, dbg_pt)), V2(0, offset_px)), text);
}
}
#endif
}
}
#endif
}
/* Draw collision debug */
#if COLLIDER_DEBUG
if (sim_ent_has_prop(ent, SIM_ENT_PROP_COLLISION_DEBUG)) {
struct phys_collision_debug *data = &ent->collision_debug_data;
struct collider_collision_points_result collider_res = data->res;
struct sim_ent *e0 = sim_ent_from_id(G.ss_blended, data->e0);
struct sim_ent *e1 = sim_ent_from_id(G.ss_blended, data->e1);
struct collider_shape e0_collider = e0->local_collider;
struct collider_shape e1_collider = e1->local_collider;
(UNUSED)e0_collider;
(UNUSED)e1_collider;
/* Draw closest points */
#if 0
{
f32 radius = 4;
u32 color = RGBA_32_F(1, 1, 0, 0.5);
struct v2 a = xform_mul_v2(G.world_to_ui_xf, data->closest0);
struct v2 b = xform_mul_v2(G.world_to_ui_xf, data->closest1);
draw_circle(G.ui_cmd_buffer, a, radius, color, 10);
draw_circle(G.ui_cmd_buffer, b, radius, color, 10);
}
#endif
/* Draw clipping */
{
f32 thickness = 2;
f32 radius = 4;
u32 color_line = RGBA_32_F(1, 0, 1, 0.25);
u32 color_a = RGBA_32_F(1, 0, 0, 0.25);
u32 color_b = RGBA_32_F(0, 1, 0, 0.25);
u32 color_line_clipped = RGBA_32_F(1, 0, 1, 1);
u32 color_a_clipped = RGBA_32_F(1, 0, 0, 1);
u32 color_b_clipped = RGBA_32_F(0, 1, 0, 1);
{
struct v2 a = xform_mul_v2(G.world_to_ui_xf, collider_res.a0);
struct v2 b = xform_mul_v2(G.world_to_ui_xf, collider_res.b0);
draw_line(G.ui_cmd_buffer, a, b, thickness, color_line);
draw_circle(G.ui_cmd_buffer, a, radius, color_a, 10);
draw_circle(G.ui_cmd_buffer, b, radius, color_b, 10);
struct v2 a_clipped = xform_mul_v2(G.world_to_ui_xf, collider_res.a0_clipped);
struct v2 b_clipped = xform_mul_v2(G.world_to_ui_xf, collider_res.b0_clipped);
draw_line(G.ui_cmd_buffer, a_clipped, b_clipped, thickness, color_line_clipped);
draw_circle(G.ui_cmd_buffer, a_clipped, radius, color_a_clipped, 10);
draw_circle(G.ui_cmd_buffer, b_clipped, radius, color_b_clipped, 10);
}
{
struct v2 a = xform_mul_v2(G.world_to_ui_xf, collider_res.a1);
struct v2 b = xform_mul_v2(G.world_to_ui_xf, collider_res.b1);
draw_line(G.ui_cmd_buffer, a, b, thickness, color_line);
draw_circle(G.ui_cmd_buffer, a, radius, color_a, 10);
draw_circle(G.ui_cmd_buffer, b, radius, color_b, 10);
struct v2 a_clipped = xform_mul_v2(G.world_to_ui_xf, collider_res.a1_clipped);
struct v2 b_clipped = xform_mul_v2(G.world_to_ui_xf, collider_res.b1_clipped);
draw_line(G.ui_cmd_buffer, a_clipped, b_clipped, thickness, color_line_clipped);
draw_circle(G.ui_cmd_buffer, a_clipped, radius, color_a_clipped, 10);
draw_circle(G.ui_cmd_buffer, b_clipped, radius, color_b_clipped, 10);
}
}
#if COLLIDER_DEBUG_DETAILED_DRAW_MENKOWSKI
struct xform e0_xf = data->xf0;
struct xform e1_xf = data->xf1;
#if 0
/* Only draw points with large separation */
b32 should_draw = false;
for (u32 i = 0; i < data->num_points; ++i) {
if (data->points[i].starting_separation < -0.1) {
should_draw = true;
break;
}
}
#else
b32 should_draw = true;
#endif
if (should_draw) {
#if 0
/* Test info */
{
struct font *disp_font = font_load_async(LIT("res/fonts/fixedsys.ttf"), 12.0f);
if (disp_font) {
f32 offset_px = 10;
struct string fmt = LIT(
"e0 pos: (%F, %F)\n"
"e0 rot: %F\n"
"e1 pos: (%F, %F)\n"
"e1 rot: %F\n"
);
struct string text = string_format(temp.arena, fmt,
FMT_FLOAT_P(e0_xf.og.x, 24), FMT_FLOAT_P(e0_xf.og.y, 24),
FMT_FLOAT_P(xform_get_rotation(e0_xf), 24),
FMT_FLOAT_P(e1_xf.og.x, 24), FMT_FLOAT_P(e1_xf.og.y, 24),
FMT_FLOAT_P(xform_get_rotation(e1_xf), 24));
draw_text(G.ui_cmd_buffer, disp_font, v2_add(v2_round(xform_mul_v2(G.world_to_ui_xf, V2(0, 0))), V2(0, offset_px)), text);
}
}
#endif
/* Draw menkowski */
{
u32 color = collider_res.solved ? RGBA_32_F(0, 0, 0.25, 1) : RGBA_32_F(0, 0.25, 0.25, 1);
f32 thickness = 2;
u32 detail = 512;
(UNUSED)thickness;
struct v2_array m = menkowski(temp.arena, &e0_collider, &e1_collider, e0_xf, e1_xf, detail);
for (u64 i = 0; i < m.count; ++i) m.points[i] = xform_mul_v2(G.world_to_ui_xf, m.points[i]);
draw_poly_line(G.ui_cmd_buffer, m, true, thickness, color);
//draw_poly(G.ui_cmd_buffer, m, color);
}
/* Draw cloud */
{
u32 color = RGBA_32_F(1, 1, 1, 1);
f32 radius = 2;
struct v2_array m = cloud(temp.arena, &e0_collider, &e1_collider, e0_xf, e1_xf);
for (u64 i = 0; i < m.count; ++i) {
struct v2 p = xform_mul_v2(G.world_to_ui_xf, m.points[i]);
draw_circle(G.ui_cmd_buffer, p, radius, color, 10);
}
}
/* Draw normal */
{
u32 color = COLOR_WHITE;
f32 len = 0.1f;
f32 arrow_thickness = 2;
f32 arrow_height = 5;
struct v2 start = xform_mul_v2(G.world_to_ui_xf, V2(0, 0));
struct v2 end = xform_mul_v2(G.world_to_ui_xf, v2_mul(v2_norm(collider_res.normal), len));
draw_arrow_line(G.ui_cmd_buffer, start, end, arrow_thickness, arrow_height, color);
}
/* Draw prototype */
{
f32 thickness = 2;
u32 color = RGBA_32_F(1, 1, 1, 0.25);
struct v2_array m = {
.points = collider_res.prototype.points,
.count = collider_res.prototype.len
};
for (u64 i = 0; i < m.count; ++i) m.points[i] = xform_mul_v2(G.world_to_ui_xf, m.points[i]);
draw_poly_line(G.ui_cmd_buffer, m, true, thickness, color);
for (u64 i = 0; i < m.count; ++i) draw_circle(G.ui_cmd_buffer, m.points[i], 10, color, 10);
}
/* Draw simplex */
{
f32 thickness = 2;
u32 line_color = COLOR_YELLOW;
u32 color_first = RGBA_32_F(1, 0, 0, 0.75);
u32 color_second = RGBA_32_F(0, 1, 0, 0.75);
u32 color_third = RGBA_32_F(0, 0, 1, 0.75);
struct collider_menkowski_simplex simplex = collider_res.simplex;
struct v2 simplex_points[] = { simplex.a.p, simplex.b.p, simplex.c.p };
for (u64 i = 0; i < ARRAY_COUNT(simplex_points); ++i) simplex_points[i] = xform_mul_v2(G.world_to_ui_xf, simplex_points[i]);
struct v2_array simplex_array = { .count = simplex.len, .points = simplex_points };
if (simplex.len >= 1) {
u32 color = simplex.len == 1 ? color_first : (simplex.len == 2 ? color_second : color_third);
draw_circle(G.ui_cmd_buffer, simplex_array.points[0], thickness * 3, color, 10);
}
if (simplex.len >= 2) {
u32 color = simplex.len == 2 ? color_first : color_second;
draw_circle(G.ui_cmd_buffer, simplex_array.points[1], thickness * 3, color, 10);
}
if (simplex.len >= 3) {
u32 color = color_first;
draw_circle(G.ui_cmd_buffer, simplex_array.points[2], thickness * 3, color, 10);
}
if (simplex.len >= 2) {
draw_poly_line(G.ui_cmd_buffer, simplex_array, simplex.len > 2, thickness, line_color);
}
}
}
#endif
}
#endif
#endif
/* Draw hierarchy */
if (sim_ent_has_prop(parent, SIM_ENT_PROP_ACTIVE) && !parent->is_root) {
u32 color = RGBA_32_F(0.6, 0.6, 1, 0.75);
f32 thickness = 2;
f32 arrow_height = 15;
struct v2 start = xform_mul_v2(G.world_to_ui_xf, xf.og);
struct v2 end = xform_mul_v2(G.world_to_ui_xf, parent_xf.og);
draw_arrow_line(G.ui_cmd_buffer, start, end, thickness, arrow_height, color);
}
/* Draw camera rect */
if (sim_ent_has_prop(ent, SIM_ENT_PROP_CAMERA)) {
u32 color = ent == local_camera ? RGBA_32_F(1, 1, 1, 0.5) : RGBA_32_F(0, 0.75, 0, 0.5);
f32 thickness = 3;
struct xform quad_xf = xform_mul(xf, ent->camera_quad_xform);
struct quad quad = xform_mul_quad(quad_xf, QUAD_UNIT_SQUARE_CENTERED);
quad = xform_mul_quad(G.world_to_ui_xf, quad);
draw_quad_line(G.ui_cmd_buffer, quad, thickness, color);
}
arena_temp_end(temp);
}
}
}
/* Draw crosshair or show cursor */
if (!G.debug_camera) {
__profscope(draw_crosshair);
struct v2 crosshair_pos = G.ui_cursor;
u32 tint = RGBA_32_F(1, 1, 1, 1);
struct sprite_tag crosshair_tag = sprite_tag_from_path(LIT("res/graphics/crosshair.ase"));
struct sprite_texture *t = sprite_texture_from_tag_async(sprite_frame_scope, crosshair_tag);
struct v2 size = V2(t->width, t->height);
struct xform xf = XFORM_TRS(.t = crosshair_pos, .s = size);
struct quad quad = xform_mul_quad(xf, QUAD_UNIT_SQUARE_CENTERED);
draw_quad_texture(G.ui_cmd_buffer, DRAW_TEXTURE_PARAMS(.sprite = crosshair_tag, .tint = tint), quad);
struct rect cursor_clip = RECT_FROM_V2(G.ui_screen_offset, G.ui_size);
cursor_clip.pos = v2_add(cursor_clip.pos, v2_mul(size, 0.5f));
cursor_clip.pos = v2_add(cursor_clip.pos, V2(1, 1));
cursor_clip.size = v2_sub(cursor_clip.size, size);
sys_window_cursor_hide(G.window);
sys_window_cursor_enable_clip(G.window, cursor_clip);
} else {
__profscope(update_window_cursor);
sys_window_cursor_disable_clip(G.window);
sys_window_cursor_show(G.window);
}
/* ========================== *
* Create user sim cmd
* ========================== */
{
/* Queue player move cmd */
f32 move_speed = 1.0f;
if (G.bind_states[USER_BIND_KIND_WALK].is_held) {
//const f32 walk_ratio = 0.25f;
const f32 walk_ratio = 0.05f;
move_speed *= walk_ratio;
}
struct v2 input_move_dir = ZI;
{
for (enum user_bind_kind bind = 0; bind < (i32)ARRAY_COUNT(G.bind_states); ++bind) {
struct bind_state state = G.bind_states[bind];
if (!state.is_held && state.num_presses <= 0) {
continue;
}
switch (bind) {
/* Movement */
case USER_BIND_KIND_MOVE_UP:
{
input_move_dir.y -= 1;
} break;
case USER_BIND_KIND_MOVE_DOWN:
{
input_move_dir.y += 1;
} break;
case USER_BIND_KIND_MOVE_LEFT:
{
input_move_dir.x -= 1;
} break;
case USER_BIND_KIND_MOVE_RIGHT:
{
input_move_dir.x += 1;
} break;
default: break;
}
}
input_move_dir = xform_basis_invert_mul_v2(G.world_to_ui_xf, input_move_dir); /* Make move dir relative to world view */
input_move_dir = v2_mul(v2_norm(input_move_dir), move_speed);
}
struct v2 input_aim_dir = v2_sub(G.world_cursor, sim_ent_get_xform(local_control).og);
/* Queue player control cmd */
{
struct sim_control control = ZI;
control.move = input_move_dir;
control.focus = input_aim_dir;
struct bind_state fire_state = G.bind_states[USER_BIND_KIND_FIRE];
struct bind_state drag_state = G.bind_states[USER_BIND_KIND_DEBUG_DRAG];
struct bind_state clear_state = G.bind_states[USER_BIND_KIND_DEBUG_CLEAR];
struct bind_state pause_state = G.bind_states[USER_BIND_KIND_DEBUG_PAUSE];
struct bind_state step_state = G.bind_states[USER_BIND_KIND_DEBUG_STEP];
struct bind_state spawn_state = G.bind_states[USER_BIND_KIND_DEBUG_SPAWN];
struct bind_state tile_state = G.bind_states[USER_BIND_KIND_TILE_TEST];
if (fire_state.num_presses || fire_state.is_held) {
control.flags |= SIM_CONTROL_FLAG_FIRE;
}
if (drag_state.num_presses || drag_state.is_held) {
control.flags |= SIM_CONTROL_FLAG_DRAG;
}
if (clear_state.num_presses) {
control.flags |= SIM_CONTROL_FLAG_CLEAR_ALL;
}
if (pause_state.num_presses) {
control.flags |= SIM_CONTROL_FLAG_PAUSE;
}
if (step_state.num_presses) {
control.flags |= SIM_CONTROL_FLAG_STEP;
}
if (spawn_state.num_presses) {
control.flags |= SIM_CONTROL_FLAG_SPAWN_TEST;
}
if (tile_state.num_presses) {
control.flags |= SIM_CONTROL_FLAG_TILE_TEST;
}
/* Set user sim control */
{
struct sys_lock lock = sys_mutex_lock_e(&G.user_sim_cmd_mutex);
/* Reset flags */
if (G.user_sim_cmd_gen != G.last_user_sim_cmd_gen) {
G.user_sim_cmd_control.flags = 0;
G.last_user_sim_cmd_gen = G.user_sim_cmd_gen;
}
u32 old_flags = G.user_sim_cmd_control.flags;
G.user_sim_cmd_control = control;
G.user_sim_cmd_control.flags |= old_flags;
G.user_hovered_ent = hovered_ent->id;
sys_mutex_unlock(&lock);
}
}
#if COLLIDER_DEBUG
/* Gjk steps */
{
i64 new_steps = collider_debug_steps;
new_steps += G.bind_states[USER_BIND_KIND_INCR_COLLIDER_GJK_STEPS].num_presses_and_repeats;
new_steps -= G.bind_states[USER_BIND_KIND_DECR_COLLIDER_GJK_STEPS].num_presses_and_repeats;
if (G.bind_states[USER_BIND_KIND_RESET_COLLIDER_GJK_STEPS].num_presses_and_repeats > 0) new_steps = 0;
collider_debug_steps = (u32)clamp_i64(new_steps, 0, U32_MAX);
}
#endif
}
{
/* Update network usage stats */
i64 stat_now_ns = sys_time_ns();
G.net_bytes_read.last_second_end = gstat_get(GSTAT_SOCK_BYTES_RECEIVED);
G.net_bytes_sent.last_second_end = gstat_get(GSTAT_SOCK_BYTES_SENT);
if (stat_now_ns - G.last_second_reset_ns > NS_FROM_SECONDS(1)) {
G.last_second_reset_ns = stat_now_ns;
G.net_bytes_read.last_second = G.net_bytes_read.last_second_end - G.net_bytes_read.last_second_start;
G.net_bytes_sent.last_second = G.net_bytes_sent.last_second_end - G.net_bytes_sent.last_second_start;
G.net_bytes_read.last_second_start = G.net_bytes_read.last_second_end;
G.net_bytes_sent.last_second_start = G.net_bytes_sent.last_second_end;
}
}
/* ========================== *
* Draw ent debug info
* ========================== */
if (G.debug_draw && hovered_ent->valid) {
struct sim_ent *ent = hovered_ent;
struct v2 pos = v2_add(G.ui_cursor, V2(15, 15));
struct font *font = font_load_async(LIT("res/fonts/fixedsys.ttf"), 12.0f);
if (font) {
struct temp_arena temp = arena_temp_begin(scratch.arena);
struct string dbg_text = ZI;
dbg_text.text = arena_dry_push(temp.arena, u8);
dbg_text.len += get_ent_debug_text(temp.arena, ent).len;
draw_text(G.ui_cmd_buffer, font, pos, dbg_text);
arena_temp_end(temp);
}
}
/* ========================== *
* Draw global debug info
* ========================== */
if (G.debug_draw) {
f32 spacing = 20;
struct v2 pos = V2(10, 8);
struct font *font = font_load_async(LIT("res/fonts/fixedsys.ttf"), 12.0f);
if (font) {
struct temp_arena temp = arena_temp_begin(scratch.arena);
#if BITBUFF_DEBUG
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("(bitbuff debug enabled)")));
pos.y += spacing;
#endif
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("blended world entities: %F/%F"), FMT_UINT(G.ss_blended->num_ents_allocated), FMT_UINT(G.ss_blended->num_ents_reserved)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("blended world tick: %F"), FMT_UINT(G.ss_blended->tick)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("blended world time: %F"), FMT_FLOAT_P(SECONDS_FROM_NS(G.ss_blended->sim_time_ns), 3)));
pos.y += spacing;
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("average local sim publish dt: %F"), FMT_FLOAT_P(SECONDS_FROM_NS(G.average_local_to_user_snapshot_publish_dt_ns), 3)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("local sim last known tick: %F"), FMT_UINT(G.local_sim_last_known_tick)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("local sim last known time: %F"), FMT_FLOAT_P(SECONDS_FROM_NS(G.local_sim_last_known_time_ns), 3)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("local sim predicted time: %F"), FMT_FLOAT_P(SECONDS_FROM_NS(G.local_sim_predicted_time_ns), 3)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("render time target: %F"), FMT_FLOAT_P(SECONDS_FROM_NS(G.render_time_target_ns), 3)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("render time: %F"), FMT_FLOAT_P(SECONDS_FROM_NS(G.render_time_ns), 3)));
pos.y += spacing;
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("local player: [%F]"), FMT_UID(local_player->id.uid)));
pos.y += spacing;
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("Network read: %F mbit/s"), FMT_FLOAT_P((f64)G.net_bytes_read.last_second * 8 / 1000 / 1000, 3)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("Network write: %F mbit/s"), FMT_FLOAT_P((f64)G.net_bytes_sent.last_second * 8 / 1000 / 1000, 3)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("Ping (real): %F ms"), FMT_FLOAT_P(SECONDS_FROM_NS(local_player->player_last_rtt_ns) * 1000, 3)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("Ping (average): %F ms"), FMT_FLOAT_P(local_player->player_average_rtt_seconds * 1000, 3)));
pos.y += spacing;
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("Memory usage: %F MiB"), FMT_FLOAT_P((f64)gstat_get(GSTAT_MEMORY_COMMITTED) / 1024 / 1024, 3)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("Virtual memory usage: %F TiB"), FMT_FLOAT_P((f64)gstat_get(GSTAT_MEMORY_RESERVED) / 1024 / 1024 / 1024 / 1024, 3)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("Arenas allocated: %F"), FMT_UINT(gstat_get(GSTAT_NUM_ARENAS))));
pos.y += spacing;
pos.y += spacing;
#if 0
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("screen_size: (%F, %F)"), FMT_FLOAT((f64)G.screen_size.x), FMT_FLOAT((f64)G.screen_size.y)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("screen_cursor: (%F, %F)"), FMT_FLOAT((f64)G.screen_cursor.x), FMT_FLOAT((f64)G.screen_cursor.y)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("ui_screen_offset: (%F, %F)"), FMT_FLOAT((f64)G.ui_screen_offset.x), FMT_FLOAT((f64)G.ui_screen_offset.y)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("ui_size: (%F, %F)"), FMT_FLOAT((f64)G.ui_size.x), FMT_FLOAT((f64)G.ui_size.y)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("ui_center: (%F, %F)"), FMT_FLOAT((f64)G.ui_center.x), FMT_FLOAT((f64)G.ui_center.y)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("ui_cursor: (%F, %F)"), FMT_FLOAT((f64)G.ui_cursor.x), FMT_FLOAT((f64)G.ui_cursor.y)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("world_to_ui_xf.og: (%F, %F)"), FMT_FLOAT((f64)G.world_to_ui_xf.og.x), FMT_FLOAT((f64)G.world_to_ui_xf.og.y)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("world_to_ui_xf rotation: %F"), FMT_FLOAT((f64)xform_get_rotation(G.world_to_ui_xf))));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("world_to_ui_xf scale: (%F, %F)"), FMT_FLOAT((f64)xform_get_scale(G.world_to_ui_xf).x), FMT_FLOAT((f64)xform_get_scale(G.world_to_ui_xf).x)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("world_cursor: (%F, %F)"), FMT_FLOAT((f64)G.world_cursor.x), FMT_FLOAT((f64)G.world_cursor.y)));
pos.y += spacing;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("debug_camera: %F"), FMT_STR(G.debug_camera ? LIT("true") : LIT("false"))));
pos.y += spacing;
struct v2 player_linear_vel = sim_ent_find_first_match_one(store, SIM_ENT_PROP_PLAYER_CONTROLLED)->linear_velocity;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("player linear velocity: (%F, %F)"), FMT_FLOAT_P((f64)player_linear_vel.x, 12), FMT_FLOAT_P((f64)player_linear_vel.y, 12)));
pos.y += spacing;
f32 player_angular_vel = sim_ent_find_first_match_one(store, SIM_ENT_PROP_PLAYER_CONTROLLED)->angular_velocity;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("player angular velocity: %F"), FMT_FLOAT_P((f64)player_angular_vel, 12)));
pos.y += spacing;
struct v2 player_pos = sim_ent_get_xform(sim_ent_find_first_match_one(store, SIM_ENT_PROP_PLAYER_CONTROLLED)).og;
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("player pos: (%F, %F)"), FMT_FLOAT_P((f64)player_pos.x, 12), FMT_FLOAT_P((f64)player_pos.y, 12)));
pos.y += spacing;
#endif
#if COLLIDER_DEBUG
draw_text(G.ui_cmd_buffer, font, pos, string_format(temp.arena, LIT("collider gjk steps: %F"), FMT_UINT(collider_debug_steps)));
pos.y += spacing;
#endif
arena_temp_end(temp);
}
}
/* ========================== *
* Render
* ========================== */
{
__profscope(render);
struct rect ui_viewport = RECT_FROM_V2(V2(0, 0), G.ui_size);
struct rect backbuffer_viewport = RECT_FROM_V2(V2(0, 0), G.screen_size);
/* Allocate render textures */
struct v2i32 ui_resolution = v2_round_to_int(ui_viewport.size);
struct v2i32 backbuffer_resolution = v2_round_to_int(backbuffer_viewport.size);
struct v2i32 world_resolution = ui_resolution;
{
/* World texture */
if (!G.world_texture.handle || !v2i32_eq(renderer_texture_get_size(G.world_texture), world_resolution)) {
if (G.world_texture.handle) {
renderer_texture_release(G.world_texture);
}
G.world_texture = renderer_texture_alloc(RENDERER_TEXTURE_FORMAT_R8G8B8A8_UNORM, RENDERER_TEXTURE_FLAG_TARGET, world_resolution, NULL);
}
/* Ui texture */
if (!G.ui_texture.handle || !v2i32_eq(renderer_texture_get_size(G.ui_texture), ui_resolution)) {
if (G.ui_texture.handle) {
renderer_texture_release(G.ui_texture);
}
G.ui_texture = renderer_texture_alloc(RENDERER_TEXTURE_FORMAT_R8G8B8A8_UNORM, RENDERER_TEXTURE_FLAG_TARGET, ui_resolution, NULL);
}
/* Final texture */
if (!G.final_texture.handle || !v2i32_eq(renderer_texture_get_size(G.final_texture), ui_resolution)) {
if (G.final_texture.handle) {
renderer_texture_release(G.final_texture);
}
G.final_texture = renderer_texture_alloc(RENDERER_TEXTURE_FORMAT_R8G8B8A8_UNORM, RENDERER_TEXTURE_FLAG_TARGET, ui_resolution, NULL);
}
/* Backbuffer texture */
if (!G.backbuffer_texture.handle || !v2i32_eq(renderer_texture_get_size(G.backbuffer_texture), backbuffer_resolution)) {
G.backbuffer_texture = renderer_backbuffer_recreate(backbuffer_resolution);
}
}
/* Combine render textures w/ quad draw cmds */
{
/* Draw world texture to final */
{
struct draw_texture_params params = DRAW_TEXTURE_PARAMS(.texture = G.world_texture);
struct quad quad = quad_from_rect(RECT_FROM_V2(V2(0, 0), V2_FROM_V2I32(ui_resolution)));
draw_quad_texture(G.final_cmd_buffer, params, quad);
}
/* Draw ui texture to final */
{
struct draw_texture_params params = DRAW_TEXTURE_PARAMS(.texture = G.ui_texture);
struct quad quad = quad_from_rect(RECT_FROM_V2(V2(0, 0), V2_FROM_V2I32(ui_resolution)));
draw_quad_texture(G.final_cmd_buffer, params, quad);
}
/* Draw final texture to backbuffer */
{
struct draw_texture_params params = DRAW_TEXTURE_PARAMS(.texture = G.final_texture);
struct quad quad = quad_from_rect(RECT_FROM_V2(G.ui_screen_offset, V2_FROM_V2I32(G.ui_size)));
draw_quad_texture(G.backbuffer_cmd_buffer, params, quad);
}
}
/* Send cmd buffers to GPU */
renderer_cmd_buffer_send_to_gpu(G.world_cmd_buffer);
renderer_cmd_buffer_send_to_gpu(G.ui_cmd_buffer);
renderer_cmd_buffer_send_to_gpu(G.final_cmd_buffer);
renderer_cmd_buffer_send_to_gpu(G.backbuffer_cmd_buffer);
/* Execute render cmds */
{
/* Clear textures */
renderer_texture_clear(G.world_texture, RGBA_32_F(0.2f, 0.2f, 0.2f, 1.f));
renderer_texture_clear(G.ui_texture, RGBA_32_F(0, 0, 0, 0));
renderer_texture_clear(G.final_texture, RGBA_32_F(0, 0, 0, 0));
renderer_texture_clear(G.backbuffer_texture, RGBA_32_F(0, 0, 0, 1));
/* Render to world texture */
renderer_texture_render(G.world_texture, G.world_cmd_buffer, G.world_to_ui_xf, ui_viewport, sprite_frame_scope);
/* Render to UI texture */
renderer_texture_render(G.ui_texture, G.ui_cmd_buffer, XFORM_IDENT, ui_viewport, sprite_frame_scope);
/* Render to final texture */
renderer_texture_render(G.final_texture, G.final_cmd_buffer, XFORM_IDENT, ui_viewport, sprite_frame_scope);
/* Render to backbuffer */
renderer_texture_render(G.backbuffer_texture, G.backbuffer_cmd_buffer, XFORM_IDENT, backbuffer_viewport, sprite_frame_scope);
}
/* Present */
renderer_backbuffer_present(VSYNC_ENABLED);
}
/* ========================== *
* End frame cache scopes
* ========================== */
sprite_scope_end(sprite_frame_scope);
scratch_end(scratch);
}
/* ========================== *
* User thread
* ========================== */
INTERNAL SYS_THREAD_ENTRY_POINT_FUNC_DEF(user_thread_entry_point, arg)
{
(UNUSED)arg;
i64 last_frame_ns = 0;
i64 target_dt_ns = NS_FROM_SECONDS(USER_FPS_LIMIT > (0) ? (1.0 / USER_FPS_LIMIT) : 0);
while (!atomic_i32_eval(&G.user_thread_shutdown)) {
__profscope(user_update_w_sleep);
sleep_frame(last_frame_ns, target_dt_ns);
last_frame_ns = sys_time_ns();
user_update();
}
}
/* ========================== *
* Local sim thread
* ========================== */
INTERNAL void generate_user_input_cmds(struct sim_client *user_input_client, u64 tick)
{
struct sim_snapshot *prev_user_input_ss = sim_snapshot_from_tick(user_input_client, user_input_client->last_tick);
struct sim_snapshot *user_input_ss = sim_snapshot_alloc(user_input_client, prev_user_input_ss, tick);
struct sim_ent *user_input_root = sim_ent_from_id(user_input_ss, SIM_ENT_ROOT_ID);
/* Find / create local control cmd ent */
struct sim_ent *control_cmd = sim_ent_find_first_match_one(user_input_ss, SIM_ENT_PROP_CMD);
if (!control_cmd->valid) {
control_cmd = sim_ent_alloc_sync_src(user_input_root);
control_cmd->cmd_kind = SIM_CMD_KIND_CONTROL;
control_cmd->predictor = user_input_client->player_id;
sim_ent_enable_prop(control_cmd, SIM_ENT_PROP_CMD);
sim_ent_activate(control_cmd, user_input_ss->tick);
}
{
struct sys_lock lock = sys_mutex_lock_e(&G.user_sim_cmd_mutex);
/* Update control cmd */
{
control_cmd->cmd_control = G.user_sim_cmd_control;
control_cmd->cmd_control_hovered_ent = G.user_hovered_ent;
}
#if 0
/* Create chat cmd */
if (G.user_sim_cmd_chat.len > 0) {
struct sim_ent *chat_cmd = sim_ent_alloc_sync_src(user_input_root);
chat_cmd->cmd_kind = SIM_CMD_KIND_CHAT;
//chat_cmd->chat_msg = ZI
}
#endif
++G.user_sim_cmd_gen;
sys_mutex_unlock(&lock);
}
}
struct sim_ss_decode_node {
struct sim_client *client;
u64 tick;
u64 base_tick;
struct string tmp_encoded;
struct sim_ss_decode_node *next;
};
struct sim_decode_queue {
struct sim_ss_decode_node *first;
struct sim_ss_decode_node *last;
};
INTERNAL SYS_THREAD_ENTRY_POINT_FUNC_DEF(user_local_sim_thread_entry_point, arg)
{
#if 0
struct host_listen_address local_listen_addr = host_listen_address_from_local_name(LIT("LOCAL_SIM"));
struct host_listen_address net_listen_addr = host_listen_address_from_net_port(12345);
//struct host *host = host_alloc();
/* TODO: Host system should allocate & copy string stored in local_listen_addr */
//host_listen(host, local_listen_addr);
//host_listen(host, net_listen_addr);
#endif
(UNUSED)arg;
b32 is_master = false;
struct host *host;
if (G.connect_address_str.len > 0) {
host = host_alloc(0);
struct sock_address addr = sock_address_from_string(G.connect_address_str);
host_queue_connect_to_address(host, addr);
} else {
host = host_alloc(12345);
is_master = true;
}
struct bitbuff msg_writer_bb = bitbuff_alloc(GIGABYTE(64));
struct bitbuff snapshot_writer_bb = bitbuff_alloc(GIGABYTE(64));
struct sim_accel accel = sim_accel_alloc();
struct sim_client_store *store = sim_client_store_alloc();
struct sim_client *user_input_client = sim_client_alloc(store); /* Stores snapshots containing commands to be published to local client */
struct sim_client *local_client = sim_client_alloc(store); /* Stores snapshots produced locally */
struct sim_client *publish_client = sim_client_alloc(store); /* Stores versions of local snapshots that will be published to remote sims */
struct sim_client *master_client = sim_client_nil(); /* Stores snapshots received from master */
struct sim_client *master_blended_client = sim_client_nil(); /* Stores interpolated master snapshots */
b32 initialized_from_master = false;
i64 master_blend_time_ns = 0;
i64 average_master_receive_dt_ns = 0;
i64 last_tick_from_master_received_at_ns = 0;
i64 last_publish_to_user_ns = 0;
i64 real_time_ns = 0;
i64 real_dt_ns = 0;
i64 step_dt_ns = NS_FROM_SECONDS(1) / SIM_TICKS_PER_SECOND;
f64 compute_timescale = 1.0;
while (!atomic_i32_eval(&G.local_sim_thread_shutdown)) {
__profscope(local_sim_loop);
struct temp_arena scratch = scratch_begin_no_conflict();
{
__profscope(local_sim_sleep);
sleep_frame(real_time_ns, step_dt_ns * compute_timescale);
}
real_dt_ns = sys_time_ns() - real_time_ns;
real_time_ns += real_dt_ns;
struct host_event_list host_events = host_update_begin(scratch.arena, host);
/* Read net messages */
struct sim_decode_queue queue = ZI;
{
for (struct host_event *event = host_events.first; event; event = event->next) {
struct host_channel_id channel_id = event->channel_id;
struct sim_client *client = sim_client_from_channel_id(store, channel_id);
switch (event->kind) {
case HOST_EVENT_KIND_CHANNEL_OPENED:
{
if (!client->valid) {
if (is_master) {
/* Create remote client */
client = sim_client_alloc(store);
sim_client_set_channel_id(client, channel_id);
} else {
/* Create master client */
if (!master_client->valid) {
client = sim_client_alloc(store);
sim_client_set_channel_id(client, channel_id);
master_client = client;
master_blended_client = sim_client_alloc(store);
} else {
/* We already have a master client */
ASSERT(false);
}
}
}
} break;
case HOST_EVENT_KIND_MSG:
{
if (client->valid) {
struct bitbuff msg_bb = bitbuff_from_string(event->msg);
struct bitbuff_reader msg_br = br_from_bitbuff(&msg_bb);
u64 ack = br_read_uv(&msg_br);
u64 double_ack = br_read_uv(&msg_br);
if (ack > client->ack) {
client->ack = ack;
}
if (double_ack > client->double_ack) {
client->double_ack = double_ack;
}
/* Read & queue incoming snapshots for decoding */
u64 tmp_encoded_len = br_read_uv(&msg_br);
while (tmp_encoded_len > 0) {
u8 *tmp_encoded_bytes = br_read_bytes_raw(&msg_br, tmp_encoded_len);
if (!tmp_encoded_bytes) break;
struct bitbuff decoder_bb = bitbuff_from_string(STRING(tmp_encoded_len, tmp_encoded_bytes));
struct bitbuff_reader decoder_br = br_from_bitbuff(&decoder_bb);
u64 base_tick = br_read_uv(&decoder_br);
u64 tick = br_read_uv(&decoder_br);
struct string tmp_encoded = ZI;
tmp_encoded.len = br_num_bytes_left(&decoder_br);
tmp_encoded.text = br_read_bytes_raw(&decoder_br, tmp_encoded.len);
if (!tmp_encoded.text) tmp_encoded.len = 0;
struct sim_snapshot *base_ss = sim_snapshot_from_tick(client, base_tick);
if (base_ss->tick == base_tick) {
if (is_master) {
/* Queue incoming slave client snapshot for decoding */
//b32 should_decode = tick == client->highest_received_tick + 1 || client->highest_received_tick == 0;
b32 should_decode = tick > client->highest_received_tick;
if (should_decode) {
struct sim_ss_decode_node *node = arena_push_zero(scratch.arena, struct sim_ss_decode_node);
node->client = client;
node->tick = tick;
node->base_tick = base_tick;
node->tmp_encoded = tmp_encoded;
if (queue.last) {
queue.last->next = node;
} else {
queue.first = node;
}
queue.last = node;
if (tick > client->highest_received_tick) {
client->highest_received_tick = tick;
}
}
} else {
/* Decode incoming master client snapshots for decoding (only the newest one) */
b32 should_decode = client == master_client && tick > client->highest_received_tick;
if (should_decode) {
struct sim_ss_decode_node *node = queue.first ? queue.first : arena_push_zero(scratch.arena, struct sim_ss_decode_node);
node->client = client;
node->tick = tick;
node->base_tick = base_tick;
node->tmp_encoded = tmp_encoded;
queue.first = node;
queue.last = node;
if (tick > client->highest_received_tick) {
client->highest_received_tick = tick;
if (average_master_receive_dt_ns == 0) {
average_master_receive_dt_ns = NS_FROM_SECONDS(1) / SIM_TICKS_PER_SECOND;
} else {
average_master_receive_dt_ns -= average_master_receive_dt_ns / 50;
average_master_receive_dt_ns += (real_time_ns - last_tick_from_master_received_at_ns) / 50;
}
last_tick_from_master_received_at_ns = real_time_ns;
}
}
}
} else {
/* We do not have the tick that the incoming delta is based from */
ASSERT(false);
}
tmp_encoded_len = br_read_uv(&msg_br);
}
}
} break;
default: break;
}
}
}
/* Decode incoming snapshots */
for (struct sim_ss_decode_node *n = queue.first; n; n = n->next) {
struct sim_client *client = n->client;
u64 base_tick = n->base_tick;
u64 tick = n->tick;
struct sim_snapshot *base_ss = sim_snapshot_from_tick(client, base_tick);
if (base_ss->tick == base_tick) {
struct bitbuff bb = bitbuff_from_string(n->tmp_encoded);
struct bitbuff_reader br = br_from_bitbuff(&bb);
/* Alloc & decode snapshot */
struct sim_snapshot *ss = sim_snapshot_alloc(client, base_ss, tick);
sim_snapshot_decode(&br, ss);
/* Assume all incoming ents want to be sync srcs */
for (u64 i = 0; i < ss->num_ents_reserved; ++i) {
struct sim_ent *ent = &ss->ents[i];
if (ent->valid && sim_ent_has_prop(ent, SIM_ENT_PROP_SYNC_DST)) {
sim_ent_disable_prop(ent, SIM_ENT_PROP_SYNC_DST);
sim_ent_enable_prop(ent, SIM_ENT_PROP_SYNC_SRC);
}
}
} else {
/* We do not have the tick that the incoming delta is based from.
* This decode should never have been queued in the first place. */
ASSERT(false);
}
}
if (!is_master && !initialized_from_master) {
if (master_client->valid && master_client->last_tick > 0) {
initialized_from_master = true;
} else {
goto skip_step;
}
}
/* Update networked clients */
u64 oldest_client_ack = 0;
for (u64 i = 0; i < store->num_clients_reserved; ++i) {
struct sim_client *client = &store->clients[i];
if (client->valid && client != local_client && client != publish_client && client != user_input_client && client != master_client) {
client->last_rtt_ns = host_get_channel_last_rtt_ns(host, client->channel_id);
/* Release unneeded received snapshots */
/* TDOO: Cap how many client snapshots we're willing to retain */
if (client->double_ack > 0) {
u64 keep_tick = min_u64(client->double_ack, local_client->last_tick);
if (keep_tick > 0) {
sim_snapshot_release_ticks_in_range(client, 0, keep_tick - 1);
}
}
if (client->ack < oldest_client_ack || oldest_client_ack == 0) {
oldest_client_ack = client->ack;
}
}
}
/* Release unneeded published snapshots */
{
u64 keep_tick = oldest_client_ack;
if (keep_tick == 0 && publish_client->last_tick > 0) {
keep_tick = publish_client->last_tick - 1;
}
if (keep_tick > 0) {
--keep_tick;
}
sim_snapshot_release_ticks_in_range(publish_client, 0, keep_tick);
}
/* Release old local snapshots */
{
u64 keep_range = 50;
if (local_client->last_tick > keep_range) {
u64 keep_tick = local_client->last_tick - keep_range;
sim_snapshot_release_ticks_in_range(local_client, 0, keep_tick);
}
}
/* Release unneeded user input snapshots */
sim_snapshot_release_ticks_in_range(user_input_client, 0, local_client->first_tick - 1);
if (is_master) {
/* Step master */
struct sim_step_ctx ctx = ZI;
ctx.is_master = is_master;
ctx.sim_dt_ns = step_dt_ns;
ctx.accel = &accel;
ctx.user_input_client = user_input_client;
ctx.master_client = master_client;
ctx.publish_client = publish_client;
struct sim_snapshot *prev_world = sim_snapshot_from_tick(local_client, local_client->last_tick);
ctx.world = sim_snapshot_alloc(local_client, prev_world, local_client->last_tick + 1);
generate_user_input_cmds(user_input_client, local_client->last_tick + 1);
sim_step(&ctx);
} else if (master_client->valid) {
/* Step client */
/* TODO: Eventually determine master tick based on a delay to allow for jitter and also interpolation so we can lower snapshot publish frequency */
b32 master_ss_is_blended = false;
struct sim_snapshot *master_ss = sim_snapshot_nil();
{
/* How along are we between master sim ticks (0 = start of tick, 1 = end of tick) */
f64 tick_progress = 0;
i64 next_tick_expected_ns = last_tick_from_master_received_at_ns + average_master_receive_dt_ns;
if (next_tick_expected_ns > last_tick_from_master_received_at_ns) {
tick_progress = (f64)(real_time_ns - last_tick_from_master_received_at_ns) / (f64)(next_tick_expected_ns - last_tick_from_master_received_at_ns);
}
/* Predict master sim time based on average snapshot publish dt. */
struct sim_snapshot *newest_snapshot = sim_snapshot_from_tick(master_client, master_client->last_tick);
i64 master_sim_predicted_time_ns = newest_snapshot->sim_time_ns + (newest_snapshot->sim_dt_ns * tick_progress);
/* Determine blend time */
i64 master_blend_time_target_ns = master_sim_predicted_time_ns - (SIM_CLIENT_INTERP_RATIO * average_master_receive_dt_ns);
if (average_master_receive_dt_ns > 0) {
master_blend_time_ns += real_dt_ns;
}
i64 blend_time_target_diff_ns = master_blend_time_target_ns - master_blend_time_ns;
if (blend_time_target_diff_ns > NS_FROM_SECONDS(0.100) || blend_time_target_diff_ns < NS_FROM_SECONDS(-0.100)) {
/* Snap blend time if it gets too far from target blend time */
master_blend_time_ns = master_blend_time_target_ns;
}
u64 master_blend_tick = master_blend_time_ns / newest_snapshot->sim_dt_ns;
/* Get snapshot nearest to master blend time */
/* TODO: Blend */
struct sim_snapshot *left_snapshot = sim_snapshot_nil();
struct sim_snapshot *right_snapshot = newest_snapshot;
{
struct sim_snapshot *ss = sim_snapshot_from_tick(master_client, master_client->first_tick);
while (ss->valid) {
u64 next_tick = ss->next_tick;
i64 ss_time_ns = ss->sim_time_ns;
if (ss_time_ns < master_blend_time_ns && ss_time_ns > left_snapshot->sim_time_ns) {
left_snapshot = ss;
}
if (ss_time_ns > master_blend_time_ns && ss_time_ns < right_snapshot->sim_time_ns) {
right_snapshot = ss;
}
ss = sim_snapshot_from_tick(master_client, next_tick);
}
}
/* Create world from blended master snapshots */
f64 blend = 0;
if (left_snapshot->valid && right_snapshot->valid && right_snapshot->tick > left_snapshot->tick) {
blend = (f64)(master_blend_tick - left_snapshot->tick) / (f64)(right_snapshot->tick - left_snapshot->tick);
f64 epsilon = 0.001;
if (blend < epsilon) {
master_ss_is_blended = false;
master_ss = left_snapshot;
} else if (blend > 1 - epsilon) {
master_ss_is_blended = false;
master_ss = right_snapshot;
} else {
master_ss_is_blended = true;
master_ss = sim_snapshot_alloc_from_lerp(master_blended_client, left_snapshot, right_snapshot, blend);
/* Release unneeded blended master snapshots */
if (master_ss->tick > 0) {
sim_snapshot_release_ticks_in_range(master_blended_client, 0, master_ss->tick - 1);
sim_snapshot_release_ticks_in_range(master_blended_client, master_ss->tick + 1, U64_MAX);
}
}
} else {
master_ss_is_blended = false;
master_ss = left_snapshot->valid ? left_snapshot : right_snapshot;
}
/* Release unneeded master snapshots */
u64 keep_master_tick = min_u64(left_snapshot->tick, master_client->double_ack);
if (keep_master_tick > 0) {
sim_snapshot_release_ticks_in_range(master_client, 0, keep_master_tick - 1);
}
#if 0
DEBUGBREAKABLE;
logf_debug("*************************************************");
logf_debug("local_client->last_tick: %F", FMT_UINT(local_client->last_tick));
logf_debug("master_sim_predicted_time_ns: %F", FMT_SINT(master_sim_predicted_time_ns));
logf_debug("tick_progress: %F", FMT_FLOAT(tick_progress));
logf_debug("sim_publish_timescale: %F", FMT_FLOAT(sim_publish_timescale));
logf_debug("last_tick_from_master_received_at_ns: %F", FMT_SINT(last_tick_from_master_received_at_ns));
logf_debug("average_master_receive_dt_ns: %F", FMT_SINT(average_master_receive_dt_ns));
logf_debug("next_tick_expected_ns: %F", FMT_SINT(next_tick_expected_ns));
logf_debug("master_blend_time_target_ns: %F", FMT_SINT(master_blend_time_target_ns));
logf_debug("blend_time_target_diff_ns: %F", FMT_SINT(blend_time_target_diff_ns));
logf_debug("master_blend_time_ns: %F", FMT_SINT(master_blend_time_ns));
logf_debug("left_snapshot->tick: %F", FMT_UINT(left_snapshot->tick));
logf_debug("right_snapshot->tick: %F", FMT_UINT(right_snapshot->tick));
logf_debug("master_ss->tick: %F", FMT_UINT(master_ss->tick));
#endif
}
if (master_ss->valid) {
struct sim_ent *master_player = sim_ent_find_first_match_one(master_ss, SIM_ENT_PROP_PLAYER_IS_MASTER);
/* Update ent id from master */
{
user_input_client->player_id = master_ss->local_player;
local_client->player_id = master_ss->local_player;
}
/* Check for misprediction */
u64 mispredicted_tick = 0;
if (!master_ss_is_blended) {
/* TODO: Actually check for misprediction rather than triggering mispredict any time a new master snapshot is received */
mispredicted_tick = master_ss->tick;
}
u64 step_base_tick = local_client->last_tick;
u64 step_end_tick = step_base_tick + 1;
if (mispredicted_tick > 0) {
step_base_tick = mispredicted_tick;
if (step_end_tick <= step_base_tick) {
step_end_tick = step_base_tick + 1;
}
}
/* We want to simulate the ahead of the server to predict client input.
* How many ticks ahead we want to simulate is a balance between added latency and the server not receiving our inputs on time.
* We can take the server's ack - server's tick to determine how many cmds of ours the server has buffered.
*
* If this buffer gets too low (because we are lagging behind or the connection is unstable), meaning the server is not getting our input on time:
* - Shorten local compute rate to increase the rate at which we predict ahead & produce cmds, until the server's ack indicates a buffer size within desired range.
*
* If this buffer gets too large (because the client predicts too far ahead), meaning unneeded latency is being introduced:
* - Dilate local compute rate to decrease the rate at which we predict ahead & produce cmds until the server's ack indicates a buffer size within desired range.
*/
{
i64 cmds_ahead_on_master = (i64)master_client->ack - (i64)master_client->last_tick;
if (cmds_ahead_on_master < -3 || cmds_ahead_on_master > 10) {
/* Cmds are too far from master time, snap step end tick */
i64 rtt_ns = master_client->last_rtt_ns;
f64 rtt_tick_ratio = (f64)(rtt_ns + (step_dt_ns - 1)) / (f64)step_dt_ns;
i64 num_predict_ticks = math_round_to_int64(rtt_tick_ratio) + 5;
step_end_tick = master_client->last_tick + num_predict_ticks;
compute_timescale = 1.1;
} else if (cmds_ahead_on_master > 2) {
/* Slow down simulation to dial back how far ahead we are predicting and bring local sim time closer to master sim time */
compute_timescale = 1.1;
} else if (cmds_ahead_on_master < 1) {
/* Speed up simulation rate predict more ticks and give master more inputs to work with */
compute_timescale = 0.9;
} else {
/* Server's cmd buffer is in a healthy range */
compute_timescale = 1;
}
}
/* Sync master with local base tick */
struct sim_snapshot *base_ss = sim_snapshot_from_tick(local_client, step_base_tick);
if (mispredicted_tick) {
if (base_ss->valid) {
sim_snapshot_sync_ents(base_ss, master_ss, master_player->id, 0);
} else {
base_ss = sim_snapshot_alloc(local_client, master_ss, step_base_tick);
}
}
/* Release any existing ticks that are about to be simulated */
sim_snapshot_release_ticks_in_range(local_client, step_base_tick + 1, U64_MAX);
/* Step */
generate_user_input_cmds(user_input_client, step_end_tick);
{
struct sim_step_ctx ctx = ZI;
ctx.is_master = is_master;
ctx.sim_dt_ns = step_dt_ns;
ctx.accel = &accel;
ctx.user_input_client = user_input_client;
ctx.master_client = master_client;
ctx.publish_client = publish_client;
u64 step_tick = step_base_tick + 1;
struct sim_snapshot *prev_ss = base_ss;
while (step_tick <= step_end_tick) {
ctx.world = sim_snapshot_alloc(local_client, prev_ss, step_tick);
if (!mispredicted_tick && step_tick == step_end_tick) {
sim_snapshot_sync_ents(ctx.world, master_ss, master_player->id, SIM_SYNC_FLAG_NOSYNC_PREDICTABLES);
}
sim_step(&ctx);
prev_ss = ctx.world;
++step_tick;
}
}
}
}
/* Publish snapshot to remote clients */
for (u64 i = 0; i < store->num_clients_reserved; ++i) {
struct sim_client *client = &store->clients[i];
if (client->valid && client != user_input_client && client != local_client && client != publish_client) {
struct bitbuff_writer msg_bw = bw_from_bitbuff(&msg_writer_bb);
bw_write_uv(&msg_bw, client->highest_received_tick); /* ack */
bw_write_uv(&msg_bw, client->ack); /* double ack */
struct sim_snapshot *base_ss = sim_snapshot_from_tick(publish_client, client->ack);
struct sim_snapshot *publish_ss;
if (client == master_client) {
/* If sending to master, start sending all snapshots since last ack */
publish_ss = sim_snapshot_from_closest_tick_gte(publish_client, base_ss->tick + 1);
} else {
/* If sending to slave, only send latest snapshot */
publish_ss = sim_snapshot_from_tick(publish_client, publish_client->last_tick);
}
while (publish_ss->valid) {
struct bitbuff_writer snapshot_bw = bw_from_bitbuff(&snapshot_writer_bb);
struct string tmp_snapshot_encoded = ZI;
{
bw_write_uv(&snapshot_bw, base_ss->tick);
bw_write_uv(&snapshot_bw, publish_ss->tick);
sim_snapshot_encode(&snapshot_bw, client, base_ss, publish_ss);
tmp_snapshot_encoded.len = bw_num_bytes_written(&snapshot_bw);
tmp_snapshot_encoded.text = bw_get_written_raw(&snapshot_bw);
}
bw_write_uv(&msg_bw, tmp_snapshot_encoded.len);
bw_write_bytes(&msg_bw, tmp_snapshot_encoded);
publish_ss = sim_snapshot_from_tick(publish_client, publish_ss->tick + 1);
}
bw_write_uv(&msg_bw, 0);
struct string encoded = ZI;
encoded.len = bw_num_bytes_written(&msg_bw);
encoded.text = bw_get_written_raw(&msg_bw);
host_queue_write(host, client->channel_id, encoded, 0);
}
}
/* Copy local snapshot to user client */
{
struct sim_snapshot *local_ss = sim_snapshot_from_tick(local_client, local_client->last_tick);
if (local_ss->valid) {
/* TODO: Double buffer */
struct sys_lock lock = sys_mutex_lock_e(&G.local_to_user_client_mutex);
sim_snapshot_alloc(G.local_to_user_client, local_ss, local_ss->tick);
i64 publish_ns = sys_time_ns();
G.local_to_user_client_publish_dt_ns = publish_ns - last_publish_to_user_ns;
G.local_to_user_client_publish_time_ns = publish_ns;
last_publish_to_user_ns = publish_ns;
sim_snapshot_release_ticks_in_range(G.local_to_user_client, 0, local_ss->tick - 1);
sys_mutex_unlock(&lock);
}
}
skip_step:
/* Send host messages */
host_update_end(host);
__profframe("Local sim");
scratch_end(scratch);
}
sim_client_store_release(store);
sim_accel_release(&accel);
bitbuff_release(&snapshot_writer_bb);
bitbuff_release(&msg_writer_bb);
host_release(host);
}
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