Added SpriteBatch:attachAttribute(attributename, mesh), which lets SpriteBatches use per-vertex information from a vertex attribute in a Mesh when drawing.

Each sprite in a SpriteBatch has 4 vertices in the following order: top-left, bottom-left, top-right, bottom-right. The index returned by SpriteBatch:add (and used by SpriteBatch:set) can be multiplied by 4 to determine the first vertex in a specific sprite.

src/modules/graphics/opengl/wrap_SpriteBatch.h

@@ -43,6 +43,7 @@ int w_SpriteBatch_getColor(lua_State *L);
 int w_SpriteBatch_getCount(lua_State *L);
 int w_SpriteBatch_setBufferSize(lua_State *L);
 int w_SpriteBatch_getBufferSize(lua_State *L);
+int w_SpriteBatch_attachAttribute(lua_State *L);
 
 extern "C" int luaopen_spritebatch(lua_State *L);