Rework chunk rendering to get a 100x performance boost!

- Switching to semi-chunk mesh rendering just 100x the framerate, it was
  running at around 100fps for 3 CHUNK_DISTANCE, and pushing it above
  would make it drop to 30. Now it runs at 9000 frames per second with
  CHUNK_DISTANCE of 8, probably can push it even more

- What is bizarre is this is just from the reduction in draw calls,
  I still need to implement face culling for invisible blocks (simple)
  and frustrum culling (using AABB) or maybe octrees

- Block is way way more simplifed, it's just metadata about a coordinate
  in the chunk block array

- All rendering and mesh generation code is handled by chunks. There is
  a VAO, single VBO and EBO for each chunk. The data buffer is loaded
  into the GPU with a chunk_load, and it stays like that until it is
  loaded again. chunk_load is called if we move chunks, in
  engine_update. Here we unload existing chunks, then load the new ones

1 files changed, 2 insertions, 2 deletions

diff --git a/src/engine.h b/src/engine.h
index e7ffdaa..567d9a5 100644
--- a/src/engine.h
+++ b/src/engine.h
@@ -9,7 +9,7 @@
 // We want a square around curr_chunk, and a side of the square will be 1
 // (center chunk) + 2 * CHUNK_DISTANCE (either side of center)
 // loaded chunks = (1 + CHUNK_DISTANCE * 2)^2
-#define CHUNK_DISTANCE 3
+#define CHUNK_DISTANCE 5
 
 struct engine {
     struct window* window;
@@ -31,7 +31,7 @@ int engine_init(struct engine* engine);
 
 /**
  * Take all objects in the engine, apply the shader pipeline and draw on the window
- * Apply block, chunk and camera updates as well. This is the main game loop
+ * Apply chunk and camera updates as well. This is the main game loop
  *
  * @param engine The target engine
  */