Use alignas for zbuffer

Daft-Freak · Aug 4, 2023 · 04a37cb · 04a37cb
1 parent 51b551c
commit 04a37cb
Showing 1 changed file with 12 additions and 2 deletions.
diff --git a/engine/render_rasterize.cpp b/engine/render_rasterize.cpp
@@ -8,7 +8,7 @@
 
 uint8_t shader_override = 0;
 
-static int16_t zbuffer[SCREEN_WIDTH * SCREEN_HEIGHT] __attribute__ ((aligned (4))) = { };
+alignas(4) static int16_t zbuffer[SCREEN_WIDTH * SCREEN_HEIGHT] = { };
 
 color_t sky;
 
@@ -153,8 +153,18 @@ void RASTERIZE_SECTION render_rasterize(uint32_t num_triangle, color_t *fb) {
 
         //precalculate area of triangle for later to find barycentric coordinates
         int32_t area = (x3 - x1) * (y2 - y1) - (y3 - y1) * (x2 - x1);
+
+        //if(area == 0) area = 1;
 
         //inverse Z coordinates
+        /*int32_t zi1 = triangle_list_current[current_triangle].vertex1.z;
+        int32_t zi2 = triangle_list_current[current_triangle].vertex2.z;
+        int32_t zi3 = triangle_list_current[current_triangle].vertex3.z;
+
+        zi1 = zi1 == 0 ? INT32_MAX : ((FIXED_POINT_FACTOR * FIXED_POINT_FACTOR) / zi1);
+        zi2 = zi2 == 0 ? INT32_MAX : ((FIXED_POINT_FACTOR * FIXED_POINT_FACTOR) / zi2);
+        zi3 = zi3 == 0 ? INT32_MAX : ((FIXED_POINT_FACTOR * FIXED_POINT_FACTOR) / zi3);
+        */
         int32_t zi1 = ((FIXED_POINT_FACTOR * FIXED_POINT_FACTOR) / triangle_list_current[current_triangle].vertex1.z);
         int32_t zi2 = ((FIXED_POINT_FACTOR * FIXED_POINT_FACTOR) / triangle_list_current[current_triangle].vertex2.z);
         int32_t zi3 = ((FIXED_POINT_FACTOR * FIXED_POINT_FACTOR) / triangle_list_current[current_triangle].vertex3.z);
@@ -199,7 +209,7 @@ void RASTERIZE_SECTION render_rasterize(uint32_t num_triangle, color_t *fb) {
 
                 int32_t w1 = (FIXED_POINT_FACTOR * edge1) / area;
                 int32_t w2 = (FIXED_POINT_FACTOR * edge2) / area;
-                int32_t w3 = (FIXED_POINT_FACTOR * edge3) / area;
+                int32_t w3 = /*FIXED_POINT_FACTOR - (w1 + w2);*/(FIXED_POINT_FACTOR * edge3) / area;
 
                 //interpolated Z coordinate
                 int32_t z = ((FIXED_POINT_FACTOR * FIXED_POINT_FACTOR * FIXED_POINT_FACTOR) / (w1 * zi1 + w2 * zi2 + w3 * zi3));