added renderer, improved various things

- Added renderer to unify frame buffers
- Added FrameBuffer class as a parent for frame buffers' classes
- Improved formatting in Makefile.am
- Added const modifier in Matrix4's methods

1 files changed, 2 insertions, 2 deletions

diff --git a/src/o3d/vertex_data.h b/src/o3d/vertex_data.h
index dda881b..ec5fa25 100644
--- a/src/o3d/vertex_data.h
+++ b/src/o3d/vertex_data.h
@@ -5,8 +5,8 @@ namespace engine::o3d {
 
 class VertexData {
     public:
-        static VertexData lerp(VertexData& vd1, VertexData& vd2, float s);
-        static VertexData bilerp(VertexData& vd1, VertexData& vd2, VertexData& vd3, float s, float t);
+        static VertexData lerp(const VertexData& vd1, const VertexData& vd2, float s);
+        static VertexData bilerp(const VertexData& vd1, const VertexData& vd2, const VertexData& vd3, float s, float t);
 
         VertexData();
 };