flickering fixed !

apps/testgame/scenes/ingame.c

@@ -77,8 +77,8 @@ static void ingame_tick(struct state *state) {
 
     set_camera(&cam);
 
-    for (int y = 64; --y;)
-        for (int x = 64; --x;) {
+    for (int y = 64; y--;)
+        for (int x = 64; x--;) {
             float d0 = sample_perlin_2d((t_fvec2){x, y}, 0.2, 5) * 8 - 6;
             float d1 = sample_perlin_2d((t_fvec2){x + 1, y}, 0.2, 5) * 8 - 6;
             float d2 = sample_perlin_2d((t_fvec2){x + 1, y - 1}, 0.2, 5) * 8 - 6;

src/main.c

@@ -162,10 +162,10 @@ static void main_loop(void) {
 
             ctx.frame_accumulator -= ctx.desired_frametime;
             ctx.tick_count = (ctx.tick_count % ULLONG_MAX) + 1;
+
+            render();
         }
     }
-
-    render();
 }
 
 

src/rendering.c

@@ -121,7 +121,7 @@ static void render_space(void) {
     glActiveTexture(GL_TEXTURE0);
 
     /* solid white, no modulation */
-    glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
+    glColor4ub(255, 255, 255, 255);
 
     for (size_t i = 0; i < hmlenu(ctx.uncolored_mesh_batches); ++i) {
         draw_uncolored_space_traingle_batch(&ctx.uncolored_mesh_batches[i].value,

src/rendering/internal_api.h

@@ -57,6 +57,7 @@ union uncolored_space_triangle {
         t_fvec2 uv2; /* in pixels */
     } primitive;
 
+    /* TODO: have it packed? */
     /* structure that is passed in opengl vertex array */
     struct uncolored_space_triangle_payload {
         t_fvec3 v0;

src/rendering/triangles.h

@@ -67,8 +67,6 @@ static void draw_uncolored_space_traingle_batch(struct mesh_batch *batch,
         const t_frect srcrect = textures_get_srcrect(&ctx.texture_cache, texture_key);
         const t_frect dims    = textures_get_dims(&ctx.texture_cache, texture_key);
 
-        /* TODO: fast path for uvs mapped directly on srcrect corners? */
-
         const float wr = srcrect.w / dims.w;
         const float hr = srcrect.h / dims.h;
         const float xr = srcrect.x / dims.w;
@@ -107,7 +105,7 @@ static void draw_uncolored_space_traingle_batch(struct mesh_batch *batch,
                       (void *)offsetof(struct uncolored_space_triangle_payload, uv0));
 
     /* commit for drawing */
-    glDrawArrays(GL_TRIANGLES, 0, 3 * (int)primitives_len);
+    glDrawArrays(GL_TRIANGLES, 0, 3 * (GLint)primitives_len);
 
     glDisableClientState(GL_TEXTURE_COORD_ARRAY);
     glDisableClientState(GL_VERTEX_ARRAY);