add random direction to blood test

src/game.c

@@ -386,16 +386,22 @@ INTERNAL PHYS_COLLISION_CALLBACK_FUNC_DEF(on_collision, array)
                     /* Create test blood */
                     /* TODO: Remove this */
                     {
-                        struct xform xf = XFORM_TRS(.t = point);
+                        struct xform xf = XFORM_TRS(.t = point, .r = sys_rand_f32(0, TAU));
                         struct entity *decal = entity_alloc(root);
                         decal->sprite = sprite_tag_from_path(STR("res/graphics/blood.ase"));
                         decal->sprite_tint = RGBA_32_F(1, 1, 1, 0.25f);
                         entity_set_xform(decal, xf);
 
+                        f32 perp_range = 0.5;
+                        struct v2 linear_velocity = v2_mul(normal, 0.5);
+                        linear_velocity = v2_add(linear_velocity, v2_mul(v2_perp(normal), sys_rand_f32(-perp_range, perp_range)));
+
                         f32 angular_velocity_range = 5;
+                        f32 angular_velocity = sys_rand_f32(-angular_velocity_range, angular_velocity_range);
+
                         entity_enable_prop(decal, ENTITY_PROP_PHYSICAL_KINEMATIC);
-                        entity_set_linear_velocity(decal, v2_mul(v2_norm(v2_neg(vrel)), 0.5f));
+                        entity_set_linear_velocity(decal, linear_velocity);
-                        entity_set_angular_velocity(decal, angular_velocity_range - (((f32)sys_rand_u32() / (f32)U32_MAX) * (angular_velocity_range * 2)));
+                        entity_set_angular_velocity(decal, angular_velocity);
 
                         decal->linear_damping = 5.0f;
                         decal->angular_damping = 5.0f;
@@ -1067,7 +1073,6 @@ INTERNAL void game_update(struct game_cmd_array game_cmds)
 
         ent->tracer_gradient_start = gradient_start;
         ent->tracer_gradient_end = gradient_end;
-
     }
 
     /* ========================== *

src/sys.h

@@ -447,6 +447,7 @@ u32 sys_num_logical_processors(void);
 void sys_exit(void);
 
 u32 sys_rand_u32(void);
+f32 sys_rand_f32(f32 range_start, f32 range_end);
 
 void sys_panic(struct string msg);
 

src/sys_win32.c

@@ -1872,6 +1872,11 @@ u32 sys_rand_u32(void)
     return v;
 }
 
+f32 sys_rand_f32(f32 range_start, f32 range_end)
+{
+    return ((f32)sys_rand_u32() / (f32)U32_MAX) * (range_end - range_start) + range_start;
+}
+
 void sys_panic(struct string msg)
 {
     ASSERT(false);

src/user.c

@@ -881,35 +881,6 @@ INTERNAL void user_update(void)
 
         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 tracer */
         if (entity_has_prop(ent, ENTITY_PROP_TRACER)) {
             struct v2 velocity = ent->tracer_start_velocity;
@@ -968,42 +939,6 @@ INTERNAL void user_update(void)
         /* Debug draw entity 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_DYNAMIC) || entity_has_prop(ent, ENTITY_PROP_PHYSICAL_KINEMATIC)) {
                 debug_draw_movement(ent);
@@ -1015,7 +950,6 @@ INTERNAL void user_update(void)
                 debug_draw_xform(xf, color_x, color_y);
             }
 
-#if 1
             /* 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);
@@ -1026,7 +960,6 @@ INTERNAL void user_update(void)
                 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));
             }
-#endif
 
 #if 0
             /* Draw slices */