power_play/src/user.c
2024-08-21 14:31:44 -05:00

1179 lines
43 KiB
C

#include "user.h"
#include "renderer.h"
#include "font.h"
#include "sprite.h"
#include "draw.h"
#include "intrinsics.h"
#include "app.h"
#include "game.h"
#include "asset_cache.h"
#include "string.h"
#include "scratch.h"
#include "math.h"
#include "sys.h"
#include "world.h"
#include "entity.h"
#include "mixer.h"
#include "atomic.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 blend_tick {
struct blend_tick *next;
struct blend_tick *prev;
struct world world;
};
GLOBAL struct {
struct atomic_i32 user_thread_shutdown;
struct sys_thread user_thread;
struct arena arena;
struct sys_window *window;
struct renderer_canvas *world_canvas;
struct renderer_canvas *viewport_bg_canvas;
struct renderer_canvas *viewport_canvas;
struct xform world_view;
struct blend_tick *head_free_blend_tick;
struct blend_tick *head_blend_tick;
struct world world;
struct bind_state bind_states[USER_BIND_KIND_COUNT];
b32 debug_camera;
b32 debug_camera_panning;
struct v2 debug_camera_pan_start;
b32 debug_draw;
/* User thread input */
struct sys_mutex sys_events_mutex;
struct arena sys_events_arena;
/* Per-frame */
f64 time;
f64 dt;
struct v2 screen_size;
struct v2 screen_cursor;
struct v2 viewport_screen_offset;
struct v2 viewport_size;
struct v2 viewport_center;
struct v2 viewport_cursor;
struct v2 world_cursor;
} G = { 0 }, 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_M1] = USER_BIND_KIND_FIRE,
/* Testing */
[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_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,
[SYS_BTN_CTRL] = USER_BIND_KIND_CTRL_TEST
};
/* ========================== *
* Startup
* ========================== */
INTERNAL APP_EXIT_CALLBACK_FUNC_DEF(user_shutdown);
INTERNAL SYS_THREAD_ENTRY_POINT_FUNC_DEF(user_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 game_startup_receipt *game_sr,
struct asset_cache_startup_receipt *asset_cache_sr,
struct mixer_startup_receipt *mixer_sr,
struct sys_window *window)
{
(UNUSED)work_sr;
(UNUSED)renderer_sr;
(UNUSED)font_sr;
(UNUSED)sprite_sr;
(UNUSED)draw_sr;
(UNUSED)game_sr;
(UNUSED)asset_cache_sr;
(UNUSED)mixer_sr;
G.arena = arena_alloc(GIGABYTE(64));
G.sys_events_mutex = sys_mutex_alloc();
G.sys_events_arena = arena_alloc(GIGABYTE(64));
world_alloc(&G.world);
G.world_canvas = renderer_canvas_alloc();
G.world_view = XFORM_TRS(.t = V2(0, 0), .r = 0, .s = V2(PIXELS_PER_UNIT, PIXELS_PER_UNIT));
G.viewport_bg_canvas = renderer_canvas_alloc();
G.viewport_canvas = renderer_canvas_alloc();
G.window = window;
sys_window_register_event_callback(G.window, &window_event_callback);
G.user_thread = sys_thread_alloc(&user_thread_entry_point, NULL, STR("[P1] User thread"));
app_register_exit_callback(&user_shutdown);
return (struct user_startup_receipt) { 0 };
}
INTERNAL APP_EXIT_CALLBACK_FUNC_DEF(user_shutdown)
{
__prof;
atomic_i32_eval_exchange(&G.user_thread_shutdown, true);
sys_thread_wait_release(&G.user_thread);
}
/* ========================== *
* Window -> user communication
* ========================== */
INTERNAL struct sys_event_array pop_sys_events(struct arena *arena)
{
struct sys_event_array array = { 0 };
struct sys_lock lock = sys_mutex_lock_e(&G.sys_events_mutex);
{
struct buffer events_buff = arena_to_buffer(&G.sys_events_arena);
arena_align(arena, alignof(struct sys_event));
array.events = (struct sys_event *)arena_push_array(arena, u8, events_buff.size);
array.count = events_buff.size / sizeof(struct sys_event);
MEMCPY(array.events, events_buff.data, events_buff.size);
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);
}
/* ========================== *
* Game -> user communication
* ========================== */
INTERNAL struct blend_tick *blend_tick_alloc(void)
{
struct blend_tick *bt = NULL;
if (G.head_free_blend_tick) {
bt = G.head_free_blend_tick;
G.head_free_blend_tick = bt->next;
*bt = (struct blend_tick) {
.world = bt->world
};
} else {
bt = arena_push_zero(&G.arena, struct blend_tick);
world_alloc(&bt->world);
}
if (G.head_blend_tick) {
bt->next = G.head_blend_tick;
G.head_blend_tick->prev = bt;
}
G.head_blend_tick = bt;
return bt;
}
INTERNAL void blend_tick_release(struct blend_tick *bt)
{
struct blend_tick *next = bt->next;
struct blend_tick *prev = bt->prev;
/* Remove from list */
if (next) {
next->prev = prev;
}
if (prev) {
prev->next = next;
}
if (bt == G.head_blend_tick) {
G.head_blend_tick = next;
}
/* Add to free list */
bt->next = G.head_free_blend_tick;
bt->prev = NULL;
G.head_free_blend_tick = bt;
}
struct interp_ticks {
struct world *from_tick;
struct world *to_tick;
};
INTERNAL struct interp_ticks pull_ticks(f64 blend_time)
{
__prof;
/* Find newest stored tick */
struct world *newest_tick = NULL;
for (struct blend_tick *bt = G.head_blend_tick; bt; bt = bt->next) {
if (!newest_tick || bt->world.tick_id > newest_tick->tick_id) {
newest_tick = &bt->world;
}
}
/* Pull new tick from game thread if necessary */
if (!newest_tick || game_get_latest_tick_id() > newest_tick->tick_id) {
struct blend_tick *latest_bt = blend_tick_alloc();
newest_tick = &latest_bt->world;
game_get_latest_tick(newest_tick);
}
/* Find oldest tick */
struct world *oldest_tick = NULL;
for (struct blend_tick *bt = G.head_blend_tick; bt; bt = bt->next) {
if (!oldest_tick || bt->world.tick_id < oldest_tick->tick_id) {
oldest_tick = &bt->world;
}
}
/* Find closest ticks to blend time */
struct world *from_tick = oldest_tick;
struct world *to_tick = newest_tick;
for (struct blend_tick *bt = G.head_blend_tick; bt; bt = bt->next) {
f64 bt_time = sys_timestamp_seconds(bt->world.tick_ts);
if (bt_time < blend_time && bt_time > sys_timestamp_seconds(from_tick->tick_ts)) {
from_tick = &bt->world;
}
if (bt_time > blend_time && bt_time < sys_timestamp_seconds(to_tick->tick_ts)) {
to_tick = &bt->world;
}
}
/* Free any unused old ticks */
{
struct temp_arena scratch = scratch_begin_no_conflict();
struct blend_tick **bts_to_free = arena_dry_push(scratch.arena, struct blend_tick *);
u64 bts_to_free_count = 0;
for (struct blend_tick *bt = G.head_blend_tick; bt; bt = bt->next) {
f64 bt_time = sys_timestamp_seconds(bt->world.tick_ts);
if (bt_time < sys_timestamp_seconds(from_tick->tick_ts)) {
*arena_push(scratch.arena, struct blend_tick *) = bt;
++bts_to_free_count;
}
}
for (u64 i = 0; i < bts_to_free_count; ++i) {
blend_tick_release(bts_to_free[i]);
}
scratch_end(scratch);
}
return (struct interp_ticks) {
.from_tick = from_tick,
.to_tick = to_tick
};
}
/* ========================== *
* User -> game communication
* ========================== */
struct game_cmd_node {
struct game_cmd cmd;
struct game_cmd_node *next;
};
struct game_cmd_list {
struct game_cmd_node *first;
struct game_cmd_node *last;
};
INTERNAL void queue_game_cmd(struct arena *arena, struct game_cmd_list *list, struct game_cmd cmd)
{
struct game_cmd_node *node = arena_push_zero(arena, struct game_cmd_node);
node->cmd = cmd;
if (list->first) {
list->last->next = node;
} else {
list->first = node;
}
list->last = node;
}
INTERNAL void pubilsh_game_cmds(struct game_cmd_list *list)
{
struct temp_arena scratch = scratch_begin_no_conflict();
/* Construct array */
struct game_cmd_array array = { .cmds = arena_dry_push(scratch.arena, struct game_cmd) };
for (struct game_cmd_node *node = list->first; node; node = node->next) {
struct game_cmd *cmd = arena_push(scratch.arena, struct game_cmd);
*cmd = node->cmd;
++array.count;
}
/* Push array to game thread */
if (array.count > 0) {
game_push_cmds(array);
}
scratch_end(scratch);
}
/* ========================== *
* Update
* ========================== */
/* TODO: remove this (testing) */
INTERNAL void debug_draw_xform(struct xform xf)
{
f32 thickness = 2.f;
f32 arrowhead_len = 15.f;
u32 color = RGBA_32_F(0, 1, 1, 0.3);
u32 color_x = RGBA_32_F(1, 0, 0, 0.3);
u32 color_y = RGBA_32_F(0, 1, 0, 0.3);
struct v2 pos = xform_mul_v2(G.world_view, xf.og);
struct v2 x_ray = xform_basis_mul_v2(G.world_view, xform_get_right(xf));
struct v2 y_ray = xform_basis_mul_v2(G.world_view, xform_get_up(xf));
f32 ray_scale = 1;
x_ray = v2_mul(x_ray, ray_scale);
y_ray = v2_mul(y_ray, ray_scale);
struct quad quad = quad_from_rect(RECT(0, 0, 1, -1));
quad = quad_mul_xform(quad_scale(quad, 0.075f), xf);
draw_solid_arrow_ray(G.viewport_canvas, pos, x_ray, thickness, arrowhead_len, color_x);
draw_solid_arrow_ray(G.viewport_canvas, pos, y_ray, thickness, arrowhead_len, color_y);
draw_solid_quad(G.viewport_canvas, quad, color);
}
/* TODO: remove this (testing) */
INTERNAL void debug_draw_movement(struct entity *ent)
{
f32 thickness = 2.f;
f32 arrow_len = 15.f;
u32 color_vel = RGBA_32_F(1, 0.5, 0, 1);
struct xform xf = entity_get_xform(ent);
struct v2 velocity = v2_div(v2_sub(xf.og, ent->verlet_xform.og), G.world.dt);
struct v2 pos = xform_mul_v2(G.world_view, xf.og);
struct v2 vel_ray = xform_basis_mul_v2(G.world_view, velocity);
draw_solid_arrow_ray(G.viewport_canvas, pos, vel_ray, thickness, arrow_len, color_vel);
}
INTERNAL void user_update(void)
{
struct temp_arena scratch = scratch_begin_no_conflict();
/* ========================== *
* Begin frame
* ========================== */
f64 cur_time = sys_timestamp_seconds(sys_timestamp());
G.dt = max_f64(0.0, cur_time - G.time);
G.time += G.dt;
G.screen_size = sys_window_get_size(G.window);
struct entity_store *store = G.world.entity_store;
struct sprite_scope *sprite_frame_scope = sprite_scope_begin();
struct game_cmd_list cmd_list = { 0 };
/* ========================== *
* Produce interpolated tick
* ========================== */
b32 tick_is_first_frame = false;
{
__profscope(produce_interpolated_tick);
#if USER_INTERP_ENABLED
f64 blend_time_offset = (1.0 / GAME_FPS) * USER_INTERP_OFFSET_TICK_RATIO;
f64 blend_time = G.time > blend_time_offset ? G.time - blend_time_offset : 0;
/* Pull ticks */
struct interp_ticks interp_ticks = pull_ticks(blend_time);
struct world *t0 = interp_ticks.from_tick;
struct world *t1 = interp_ticks.to_tick;
tick_is_first_frame = (t0->tick_id == 0 || t1->tick_id == 0);
f32 tick_blend = 0;
{
f64 t0_time = sys_timestamp_seconds(t0->tick_ts);
f64 t1_time = sys_timestamp_seconds(t1->tick_ts);
if (t1_time > t0_time) {
tick_blend = (f32)((blend_time - t0_time) / (t1_time - t0_time));
}
tick_blend = clamp_f32(tick_blend, 0.0f, 1.0f);
}
world_copy_replace(&G.world, t0);
/* Blend world globals */
G.world.time = math_lerp64(t0->time, t1->time, (f64)tick_blend);
G.world.dt = math_lerp64(t0->dt, t1->dt, (f64)tick_blend);
/* Blend entities */
u64 num_entities = min_u64(t0->entity_store->reserved, t1->entity_store->reserved);
{
__profscope(tick_blending);
for (u64 i = 0; i < num_entities; ++i) {
struct entity *e = &store->entities[i];
struct entity *e0 = &t0->entity_store->entities[i];
struct entity *e1 = &t1->entity_store->entities[i];
ASSERT(!e->valid || e->cached_global_xform_dirty == false); /* Game thread should have cached all global xforms before publishing */
if (e0->valid && e1->valid
&& entity_has_prop(e0, ENTITY_PROP_ACTIVE) && entity_has_prop(e1, ENTITY_PROP_ACTIVE)
&& e0->handle.gen == e1->handle.gen
&& e0->continuity_gen == e1->continuity_gen) {
e->local_xform = xform_lerp(e0->local_xform, e1->local_xform, tick_blend);
e->cached_global_xform = xform_lerp(e0->cached_global_xform, e1->cached_global_xform, tick_blend);
e->verlet_xform = xform_lerp(e0->verlet_xform, e1->verlet_xform, tick_blend);
e->control_move_force = math_lerp(e0->control_move_force, e1->control_move_force, tick_blend);
e->control.move = v2_lerp(e0->control.move, e1->control.move, tick_blend);
e->control.focus = v2_lerp(e0->control.focus, e1->control.focus, tick_blend);
e->sprite_local_xform = xform_lerp(e0->sprite_local_xform, e1->sprite_local_xform, tick_blend);
e->animation_time_in_frame = math_lerp64(e0->animation_time_in_frame, e1->animation_time_in_frame, (f64)tick_blend);
e->animation_frame = (u32)math_round_to_int(math_lerp(e0->animation_frame, e1->animation_frame, tick_blend));
e->camera_quad_xform = xform_lerp(e0->camera_quad_xform, e1->camera_quad_xform, tick_blend);
e->camera_xform_target = xform_lerp(e0->camera_xform_target, e1->camera_xform_target, tick_blend);
}
}
}
#else
struct interp_ticks interp_ticks = pull_ticks(G.time);
world_copy_replace(&G.world, interp_ticks.to_tick);
tick_is_first_frame = G.world.tick_id == 0;
#endif
}
/* ========================== *
* Find important entities
* ========================== */
struct entity *active_camera;
{
enum entity_prop props[] = { ENTITY_PROP_CAMERA, ENTITY_PROP_CAMERA_ACTIVE };
active_camera = entity_find_first_match_all(store, (struct entity_prop_array) { .count = ARRAY_COUNT(props), .props = props });
}
/* ========================== *
* Read sys events
* ========================== */
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 entity_index = 0; entity_index < events.count; ++entity_index) {
struct sys_event *event = &events.events[entity_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;
b32 out_of_bounds = button >= SYS_BTN_M1 && button <= SYS_BTN_M5 &&
(G.viewport_cursor.x < 0 ||
G.viewport_cursor.y < 0 ||
G.viewport_cursor.x > G.viewport_size.x ||
G.viewport_cursor.y > G.viewport_size.y);
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;
}
}
}
}
/* ========================== *
* Debug commands
* ========================== */
/* 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);
}
}
/* Test clear world */
{
struct bind_state state = G.bind_states[USER_BIND_KIND_DEBUG_CLEAR];
if (state.num_presses) {
queue_game_cmd(scratch.arena, &cmd_list, (struct game_cmd) {
.kind = GAME_CMD_KIND_CLEAR_ALL
});
}
}
/* Test pause */
{
struct bind_state state = G.bind_states[USER_BIND_KIND_DEBUG_PAUSE];
if (state.num_presses) {
queue_game_cmd(scratch.arena, &cmd_list, (struct game_cmd) {
.kind = GAME_CMD_KIND_PAUSE
});
}
}
/* Test step */
{
struct bind_state state = G.bind_states[USER_BIND_KIND_DEBUG_STEP];
for (u32 i = 0; i < state.num_presses_and_repeats; ++i) {
queue_game_cmd(scratch.arena, &cmd_list, (struct game_cmd) {
.kind = GAME_CMD_KIND_STEP
});
}
}
/* Test spawn */
{
struct bind_state state = G.bind_states[USER_BIND_KIND_DEBUG_SPAWN];
if (state.num_presses) {
queue_game_cmd(scratch.arena, &cmd_list, (struct game_cmd) {
.kind = GAME_CMD_KIND_SPAWN_TEST
});
}
}
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;
}
/* ========================== *
* Update viewport
* ========================== */
/* Calculate screen viewport dimensions */
if (G.debug_camera) {
G.viewport_size = G.screen_size;
G.viewport_screen_offset = V2(0, 0);
} else {
/* Determine viewport size by camera & window dimensions */
f32 aspect_ratio = 1.0;
{
struct xform quad_xf = xform_mul(entity_get_xform(active_camera), active_camera->camera_quad_xform);
struct v2 camera_size = xform_get_scale(quad_xf);
if (!v2_eq(camera_size, V2(0, 0))) {
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.viewport_size = V2(width, height);
/* Center viewport 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.viewport_screen_offset = V2(x, y);
}
G.viewport_center = v2_mul(G.viewport_size, 0.5);
G.viewport_cursor = v2_sub(G.screen_cursor, G.viewport_screen_offset);
/* ========================== *
* Update view
* ========================== */
if (G.debug_camera) {
G.world_view = xform_with_rotation(G.world_view, 0);
/* Pan view */
if (G.bind_states[USER_BIND_KIND_PAN].is_held) {
if (!G.debug_camera_panning) {
G.debug_camera_pan_start = xform_invert_mul_v2(G.world_view, G.viewport_cursor);
}
G.debug_camera_panning = true;
struct v2 offset = v2_sub(G.debug_camera_pan_start, xform_invert_mul_v2(G.world_view, G.viewport_cursor));
G.world_view = xform_translate(G.world_view, v2_neg(offset));
G.debug_camera_pan_start = xform_invert_mul_v2(G.world_view, G.viewport_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);
struct v2 world_cursor = xform_invert_mul_v2(G.world_view, G.viewport_cursor);
G.world_view = xform_translate(G.world_view, world_cursor);
G.world_view = xform_scale(G.world_view, V2(zoom, zoom));
G.world_view = xform_translate(G.world_view, v2_neg(world_cursor));
}
} else {
struct xform xf = entity_get_xform(active_camera);
struct v2 center = xf.og;
f32 rot = xform_get_rotation(xf);
/* Scale view into viewport based on camera size */
struct v2 size = G.viewport_size;
{
struct xform quad_xf = xform_mul(xf, active_camera->camera_quad_xform);
struct v2 camera_size = xform_get_scale(quad_xf);
if (!v2_eq(camera_size, V2(0, 0))) {
size = v2_div_v2(size, camera_size);
}
}
f32 scale = min_f32(size.x, size.y);
struct trs trs = TRS(
.t = v2_sub(G.viewport_center, center),
.r = rot,
.s = V2(scale, scale)
);
struct v2 pivot = center;
G.world_view = XFORM_IDENT;
G.world_view = xform_translate(G.world_view, pivot);
G.world_view = xform_trs_pivot_rs(G.world_view, trs, pivot);
}
G.world_cursor = xform_invert_mul_v2(G.world_view, G.viewport_cursor);
/* ========================== *
* Update listener
* ========================== */
{
struct v2 up = V2(0, -1);
struct v2 listener_pos = xform_invert_mul_v2(G.world_view, G.viewport_center);
struct v2 listener_dir = v2_norm(xform_basis_invert_mul_v2(G.world_view, up));
mixer_set_listener(listener_pos, listener_dir);
}
/* ========================== *
* Draw test BG
* ========================== */
{
u32 color = RGBA_32_F(0.2f, 0.2f, 0.2f, 1.f);
draw_solid_rect(G.viewport_bg_canvas, RECT(0, 0, G.viewport_size.x, G.viewport_size.y), color);
}
/* ========================== *
* Draw test grid
* ========================== */
{
f32 thickness = 3.f;
u32 color = RGBA_32(0x3f, 0x3f, 0x3f, 0xFF);
u32 x_color = RGBA_32(0x3f, 0, 0, 0xFF);
u32 y_color = RGBA_32(0, 0x3f, 0, 0xFF);
i64 startx = -10;
i64 starty = -10;
i64 rows = 20;
i64 cols = 20;
/* Draw column lines */
struct v2 col_ray = xform_basis_mul_v2(G.world_view, V2(0, rows));
for (i64 col = starty; col <= (starty + cols); ++col) {
u32 line_color = color;
if (col == 0) {
line_color = y_color;
}
struct v2 pos = xform_mul_v2(G.world_view, V2(col, starty));
draw_solid_ray(G.viewport_bg_canvas, pos, col_ray, thickness, line_color);
}
struct v2 row_ray = xform_basis_mul_v2(G.world_view, V2(cols, 0));
for (i64 row = startx; row <= (startx + rows); ++row) {
u32 line_color = color;
if (row == 0) {
line_color = x_color;
}
struct v2 pos = xform_mul_v2(G.world_view, V2(startx, row));
draw_solid_ray(G.viewport_bg_canvas, pos, row_ray, thickness, line_color);
}
}
/* ---------------------------------------------------------------------- */
/* ---------------------------------------------------------------------- */
/* ========================== *
* Draw entities
* ========================== */
for (u64 entity_index = 0; entity_index < store->reserved; ++entity_index) {
__profscope(user_entity_iter);
struct entity *ent = &store->entities[entity_index];
if (!(ent->valid && entity_has_prop(ent, ENTITY_PROP_ACTIVE))) continue;
if (sprite_tag_is_nil(ent->sprite)) continue;
struct sprite_tag sprite = ent->sprite;
struct entity *parent = entity_from_handle(store, ent->parent);
struct xform xf = entity_get_xform(ent);
struct xform parent_xf = entity_get_xform(parent);
b32 skip_debug_draw = !G.debug_camera && ent == active_camera;
b32 skip_debug_draw_transform = entity_has_prop(ent, ENTITY_PROP_CAMERA);
struct xform sprite_xform = xf;
/* Draw bullet trail */
#if 0
if (entity_has_prop(ent, ENTITY_PROP_BULLET)) {
f32 max_len = 0.75;
f32 thickness = 0.0025;
u32 color = RGBA_32_F(1, 1, 1, 1);
struct v2 end = xf.og;
struct v2 start;
struct entity *src = entity_from_handle(store, ent->bullet_src);
if (src->valid) {
start = xform_mul_v2(src->sprite_local_xform, sprite_sheet_get_slice(sprite_sheet_from_tag_await(sprite_frame_scope, src->sprite), STR("out"), src->animation_frame).center);
start = xform_mul_v2(entity_get_xform(src), start);
} else {
start = v2_sub(end, v2_div(ent->velocity, 50));
}
struct v2 rel = v2_sub(start, end);
if (v2_len(rel) > max_len) {
rel = v2_mul(v2_norm(rel), max_len);
start = v2_add(end, rel);
}
draw_solid_line(G.world_canvas, start, end, thickness, color);
}
#endif
/* Draw sprite */
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 = quad_mul_xform(QUAD_UNIT_SQUARE_CENTERED, sprite_xform);
struct draw_sprite_params params = DRAW_SPRITE_PARAMS(.sprite = sprite, .tint = ent->sprite_tint, .clip = frame.clip);
draw_sprite_quad(G.world_canvas, params, quad);
}
}
/* Debug draw info */
if (G.debug_draw && !skip_debug_draw) {
struct temp_arena temp = arena_temp_begin(scratch.arena);
#if 0
struct font *disp_font = font_load_async(STR("res/fonts/fixedsys.ttf"), 12.0f);
if (disp_font) {
struct xform xf = ent->xform_world;
struct trs trs = trs_from_xform(xf);
struct v2 velocity = ent->velocity;
struct v2 acceleration = ent->acceleration;
f32 offset = 1;
struct v2 pos = v2_add(xf.og, v2_mul(V2(0, -1), offset));
pos = xform_mul_v2(G.world_view, pos);
pos = v2_round(pos);
struct string disp_name = ent->sprite_name;
struct string fmt = STR(
"sprite name: \"%F\"\n"
"pos: (%F, %F)\n"
"scale: (%F, %F)\n"
"rot: %F\n"
"velocity: (%F, %F)\n"
"acceleration: (%F, %F)\n"
);
struct string text = string_format(temp.arena, fmt,
FMT_STR(disp_name),
FMT_FLOAT((f64)trs.t.x), FMT_FLOAT((f64)trs.t.y),
FMT_FLOAT((f64)trs.s.x), FMT_FLOAT((f64)trs.s.y),
FMT_FLOAT((f64)trs.r),
FMT_FLOAT((f64)velocity.x), FMT_FLOAT((f64)velocity.y),
FMT_FLOAT((f64)acceleration.x), FMT_FLOAT((f64)acceleration.y)
);
draw_text(G.viewport_canvas, disp_font, pos, text);
}
#endif
if (entity_has_prop(ent, ENTITY_PROP_PHYSICAL)) {
debug_draw_movement(ent);
}
if (!skip_debug_draw_transform) {
debug_draw_xform(xf);
}
/* Draw focus arrow */
if (entity_has_prop(ent, ENTITY_PROP_PLAYER_CONTROLLED)) {
struct sprite_sheet *sheet = sprite_sheet_from_tag_async(sprite_frame_scope, ent->sprite);
struct sprite_sheet_slice slice = sprite_sheet_get_slice(sheet, STR("attach.wep"), ent->animation_frame);
struct v2 start = xform_mul_v2(sprite_xform, slice.center);
start = xform_mul_v2(G.world_view, start);
struct v2 end = v2_add(xf.og, ent->control.focus);
end = xform_mul_v2(G.world_view, end);
draw_solid_arrow_line(G.viewport_canvas, start, end, 3, 10, RGBA_32_F(1, 1, 1, 0.5));
}
/* Draw slices */
if (!sprite_tag_is_nil(ent->sprite)) {
struct sprite_sheet *sheet = sprite_sheet_from_tag_async(sprite_frame_scope, sprite);
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, STR(".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_view, center);
if (!slice.has_ray) {
struct quad quad = quad_from_rect(slice.rect);
quad = quad_mul_xform(quad, sprite_xform);
quad = quad_mul_xform(quad, G.world_view);
draw_solid_quad_line(G.viewport_canvas, quad, 2, RGBA_32_F(1, 0, 0.5, 1));
}
draw_solid_circle(G.viewport_canvas, center, 3, RGBA_32_F(1, 0, 0, 1), 20);
if (slice.has_ray) {
struct v2 ray = xform_basis_mul_v2(sprite_xform, slice.dir);
ray = xform_basis_mul_v2(G.world_view, ray);
ray = v2_mul(v2_norm(ray), 25);
draw_solid_arrow_ray(G.viewport_canvas, center, ray, 2, 10, RGBA_32_F(1, 0, 0.5, 1));
}
}
}
}
/* Draw hierarchy */
if (entity_has_prop(parent, ENTITY_PROP_ACTIVE) && !parent->is_root) {
u32 color = RGBA_32_F(0.6, 0.6, 1, 0.75);
f32 thickness = 5;
f32 arrow_height = 15;
struct v2 start = xform_mul_v2(G.world_view, xf.og);
struct v2 end = xform_mul_v2(G.world_view, parent_xf.og);
draw_solid_arrow_line(G.viewport_canvas, start, end, thickness, arrow_height, color);
}
/* Draw camera rect */
if (entity_has_prop(ent, ENTITY_PROP_CAMERA)) {
u32 color = ent == active_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 = quad_mul_xform(QUAD_UNIT_SQUARE_CENTERED, quad_xf);
quad = quad_mul_xform(quad, G.world_view);
draw_solid_quad_line(G.viewport_canvas, quad, thickness, color);
}
arena_temp_end(temp);
}
}
/* Draw crosshair or show cursor */
if (!G.debug_camera) {
struct v2 crosshair_pos = G.viewport_cursor;
u32 tint = RGBA_32_F(1, 1, 1, 1);
struct sprite_tag crosshair_tag = sprite_tag_from_path(STR("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 = quad_mul_xform(QUAD_UNIT_SQUARE_CENTERED, xf);
draw_sprite_quad(G.viewport_canvas, DRAW_SPRITE_PARAMS(.sprite = crosshair_tag, .tint = tint), quad);
struct rect cursor_clip = RECT_FROM_V2(G.viewport_screen_offset, G.viewport_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 {
sys_window_cursor_disable_clip(G.window);
sys_window_cursor_show(G.window);
}
/* ========================== *
* Construct player control cmd
* ========================== */
{
/* Queue player move cmd */
struct v2 input_move_dir = { 0 };
{
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_view, input_move_dir); /* Make move dir relative to world view */
input_move_dir = v2_norm(input_move_dir);
}
struct v2 input_aim_pos = G.world_cursor;
if (!G.debug_camera) {
queue_game_cmd(scratch.arena, &cmd_list, (struct game_cmd) {
.kind = GAME_CMD_KIND_PLAYER_MOVE,
.move_dir = input_move_dir,
.aim_pos = input_aim_pos
});
/* Queue player fire cmd */
queue_game_cmd(scratch.arena, &cmd_list, (struct game_cmd) {
.kind = GAME_CMD_KIND_PLAYER_FIRE,
.state = (G.bind_states[USER_BIND_KIND_FIRE].num_presses > 0 || G.bind_states[USER_BIND_KIND_FIRE].is_held) ? GAME_CMD_STATE_START : GAME_CMD_STATE_STOP
});
}
}
/* ---------------------------------------------------------------------- */
/* ---------------------------------------------------------------------- */
/* Debug draw info */
if (G.debug_draw) {
f32 spacing = 20;
struct v2 pos = V2(10, 8);
struct font *font = font_load_async(STR("res/fonts/fixedsys.ttf"), 12.0f);
if (font) {
struct temp_arena temp = arena_temp_begin(scratch.arena);
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("time: %F"), FMT_FLOAT((f64)G.time)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("world time: %F"), FMT_FLOAT((f64)G.world.time)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("entities: %F/%F"), FMT_UINT(G.world.entity_store->allocated), FMT_UINT(G.world.entity_store->reserved)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("screen_size: (%F, %F)"), FMT_FLOAT((f64)G.screen_size.x), FMT_FLOAT((f64)G.screen_size.y)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("screen_cursor: (%F, %F)"), FMT_FLOAT((f64)G.screen_cursor.x), FMT_FLOAT((f64)G.screen_cursor.y)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("viewport_screen_offset: (%F, %F)"), FMT_FLOAT((f64)G.viewport_screen_offset.x), FMT_FLOAT((f64)G.viewport_screen_offset.y)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("viewport_size: (%F, %F)"), FMT_FLOAT((f64)G.viewport_size.x), FMT_FLOAT((f64)G.viewport_size.y)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("viewport_center: (%F, %F)"), FMT_FLOAT((f64)G.viewport_center.x), FMT_FLOAT((f64)G.viewport_center.y)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("viewport_cursor: (%F, %F)"), FMT_FLOAT((f64)G.viewport_cursor.x), FMT_FLOAT((f64)G.viewport_cursor.y)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("world_view.og: (%F, %F)"), FMT_FLOAT((f64)G.world_view.og.x), FMT_FLOAT((f64)G.world_view.og.y)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("world_view rotation: %F"), FMT_FLOAT((f64)xform_get_rotation(G.world_view))));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("world_view scale: (%F, %F)"), FMT_FLOAT((f64)xform_get_scale(G.world_view).x), FMT_FLOAT((f64)xform_get_scale(G.world_view).x)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("world_cursor: (%F, %F)"), FMT_FLOAT((f64)G.world_cursor.x), FMT_FLOAT((f64)G.world_cursor.y)));
pos.y += spacing;
draw_text(G.viewport_canvas, font, pos, string_format(temp.arena, STR("debug_camera: %F"), FMT_STR(G.debug_camera ? STR("true") : STR("false"))));
pos.y += spacing;
arena_temp_end(temp);
}
}
/* Push game cmds */
pubilsh_game_cmds(&cmd_list);
/* ========================== *
* Present
* ========================== */
/* Send canvases to GPU */
renderer_canvas_send_to_gpu(G.viewport_bg_canvas);
renderer_canvas_send_to_gpu(G.world_canvas);
renderer_canvas_send_to_gpu(G.viewport_canvas);
/* Set canvas views before presenting */
renderer_canvas_set_view(G.viewport_bg_canvas, XFORM_IDENT);
renderer_canvas_set_view(G.world_canvas, G.world_view);
renderer_canvas_set_view(G.viewport_canvas, XFORM_IDENT);
/* Present */
i32 vsync = VSYNC_ENABLED;
struct renderer_canvas **canvases = arena_dry_push(scratch.arena, struct renderer_canvas *);
u64 canvases_count = 0;
{
/* Viewport background canvas */
*arena_push(scratch.arena, struct renderer_canvas *) = G.viewport_bg_canvas;
++canvases_count;
/* World canvas */
if (!tick_is_first_frame) {
/* Only render world if not on first frame */
*arena_push(scratch.arena, struct renderer_canvas *) = G.world_canvas;
++canvases_count;
}
/* Viewport canvas */
*arena_push(scratch.arena, struct renderer_canvas *) = G.viewport_canvas;
++canvases_count;
}
renderer_canvas_present(canvases, canvases_count, G.screen_size, RECT_FROM_V2(G.viewport_screen_offset, G.viewport_size), vsync, sprite_frame_scope);
/* ========================== *
* End frame cache scopes
* ========================== */
sprite_scope_end(sprite_frame_scope);
scratch_end(scratch);
}
/* ========================== *
* User thread entry point
* ========================== */
INTERNAL SYS_THREAD_ENTRY_POINT_FUNC_DEF(user_thread_entry_point, arg)
{
(UNUSED)arg;
sys_timestamp_t last_frame_ts = 0;
f64 target_dt = USER_FRAME_LIMIT > (0) ? (1.0 / USER_FRAME_LIMIT) : 0;
while (!atomic_i32_eval(&G.user_thread_shutdown)) {
__profscope(user_update_w_sleep);
sleep_frame(last_frame_ts, target_dt);
last_frame_ts = sys_timestamp();
user_update();
}
}