Initial implementatin of barycentric coordinates

src/main.c

@@ -21,19 +21,21 @@ int main(void) {
   }
 
   Colour bg = {.r = 42, .g = 45, .b = 52, .a = 255};
+  Colour teal = {.r = 14, .g = 156, .b = 208, .a = 255};
   Colour orange = {.r = 242, .g = 100, .b = 48, .a = 255};
   Image img = {.width = 1200, .height = 1200};
   if (!init_image(arena, &img)) {
     return TINY_EXIT_IMAGE_INIT_FAILED;
   }
 
-  Model model = load_obj_file(arena, "resources/head.obj");
+  Model model = load_obj_file(arena, "resources/triangle.obj");
   if (IS_NULL_MODEL(model)) {
     return TINY_EXIT_MODEL_LOAD_FAILED;
   }
 
   clear_image(&img, bg);
-  render_model(&model, &img, orange, RENDER_TYPE_FILLED);
+  render_model(&model, &img, teal, RENDER_TYPE_FILLED);
+  render_model(&model, &img, orange, RENDER_TYPE_WIREFRAME);
   save_image(&img, "result.pam");
 
   wapp_mem_arena_destroy(&arena);