fix uvs in billboards

apps/demos/scenery/scenes/ingame.c

@@ -24,7 +24,7 @@ static void process_fly_mode(State *state) {
     SceneIngame *scn = (SceneIngame *)state->scene;
 
     DrawCameraFromPrincipalAxesResult dir_and_up =
-        draw_camera_from_principal_axes(scn->pos, (float)M_PI_2 * 0.8f, scn->roll, scn->pitch, scn->yaw);
+        draw_camera_from_principal_axes(scn->pos, scn->roll, scn->pitch, scn->yaw, (float)M_PI_2 * 0.8f, 1);
 
     const Vec3 right = m_vec_norm(m_vec_cross(dir_and_up.direction, dir_and_up.up));
     const float speed = 0.04f; /* TODO: put this in a better place */
@@ -81,7 +81,7 @@ static void process_ground_mode(State *state) {
     SceneIngame *scn = (SceneIngame *)state->scene;
 
     DrawCameraFromPrincipalAxesResult dir_and_up =
-        draw_camera_from_principal_axes(scn->pos, (float)M_PI_2 * 0.8f, scn->roll, scn->pitch, scn->yaw);
+        draw_camera_from_principal_axes(scn->pos, scn->roll, scn->pitch, scn->yaw, (float)M_PI_2 * 0.8f, 1);
 
     dir_and_up.direction.y = 0;
     dir_and_up.direction = vec3_norm(dir_and_up.direction);

src/rendering/twn_billboards.c

@@ -81,10 +81,10 @@ void finally_draw_billboard_batch(struct MeshBatch const *batch,
     const float xr = srcrect.x / dims.w;
     const float yr = srcrect.y / dims.h;
 
-    const Vec2 uv0 = { xr + wr, yr      };
-    const Vec2 uv1 = { xr + wr, yr + hr };
-    const Vec2 uv2 = { xr,      yr + hr };
-    const Vec2 uv3 = { xr,      yr      };
+    const Vec2 uv0 = { xr,           yr      };
+    const Vec2 uv1 = { xr,           yr + hr };
+    const Vec2 uv2 = { xr + wr,      yr + hr };
+    const Vec2 uv3 = { xr + wr,      yr      };
 
     for (size_t batch_n = 0; batch_n <= (primitives_len - 1) / QUAD_ELEMENT_BUFFER_LENGTH; batch_n++) {
 

src/rendering/twn_draw.c

@@ -500,7 +500,7 @@ void clear_draw_buffer(void) {
             .clear_color = true,
             .clear_depth = true,
             .clear_stencil = true,
-            .color = (Color) { 230, 230, 230, 1 }
+            .color = ctx.background_color,
         }
     };
 

src/twn_engine_context_c.h

@@ -73,6 +73,8 @@ typedef struct EngineContext {
     SDL_Window *window;
     uint32_t window_id;
 
+    Color background_color;
+
     bool is_running;
     bool window_size_has_changed;
     bool resync_flag;

src/twn_loop.c

@@ -510,6 +510,41 @@ static bool initialize(void) {
     ctx.window_dims.x = (float)ctx.base_render_width;
     ctx.window_dims.y = (float)ctx.base_render_height;
 
+    ctx.background_color = (Color){ 230, 230, 230, 255 };
+
+    toml_array_t *datum_background_color = toml_array_in(game, "background_color");
+    if (datum_background_color) do {
+        toml_datum_t datum_background_color_red = toml_int_at(datum_background_color, 0);
+        if (!datum_background_color_red.ok || datum_background_color_red.u.i < 0 || datum_background_color_red.u.i >= 256) {
+            log_warn("Invalid value for red channel of game.background_color");
+            break;
+        }
+        toml_datum_t datum_background_color_green = toml_int_at(datum_background_color, 1);
+        if (!datum_background_color_green.ok || datum_background_color_green.u.i < 0 || datum_background_color_green.u.i >= 256) {
+            log_warn("Invalid value for green channel of game.background_color");
+            break;
+        }
+        toml_datum_t datum_background_color_blue = toml_int_at(datum_background_color, 2);
+        if (!datum_background_color_blue.ok || datum_background_color_blue.u.i < 0 || datum_background_color_blue.u.i >= 256) {
+            log_warn("Invalid value for blue channel of game.background_color");
+            break;
+        }
+        toml_datum_t datum_background_color_alpha = toml_int_at(datum_background_color, 3);
+        if (!datum_background_color_alpha.ok || datum_background_color_alpha.u.i < 0 || datum_background_color_alpha.u.i >= 256) {
+            log_warn("Invalid value for alpha channel of game.background_color");
+            break;
+        }
+        ctx.background_color = (Color){
+            (uint8_t)datum_background_color_red.u.i,
+            (uint8_t)datum_background_color_green.u.i,
+            (uint8_t)datum_background_color_blue.u.i,
+            (uint8_t)datum_background_color_alpha.u.i,
+        };
+    } while (0);
+
+    ctx.game.resolution.x = (float)ctx.base_render_width;
+    ctx.game.resolution.y = (float)ctx.base_render_height;
+
     /* add a watcher for immediate updates on window size */
     SDL_AddEventWatch(event_callback, NULL);