Update chunk rendering, improve chunk loading

- On world_init, LOAD_CHUNK amount of chunks are preloaded
- Chunks are loaded around the player's current chunk, in a square
  shape. The size of the shape is controlled by CHUNK_DISTANCE
- Allow chunks struct to be independent of a position. We load a chunk
  TO a position in the world chunk grid (x, y). This allows us to "wrap"
  chunks, so we have an endless world, but we are really just wrapping
  around

1 files changed, 4 insertions, 3 deletions

diff --git a/src/world.h b/src/world.h
index c65a1d0..ec0328b 100644
--- a/src/world.h
+++ b/src/world.h
@@ -1,8 +1,8 @@
 #pragma once
 #include "chunk.h"
 #include <stdint.h>
-#define WORLD_LENGTH 32
-#define WORLD_WIDTH 32
+#define WORLD_LENGTH 6
+#define WORLD_WIDTH 6
 
 struct world {
     struct chunk* chunks[WORLD_WIDTH][WORLD_LENGTH];
@@ -11,4 +11,5 @@ struct world {
 
 int world_init(int32_t seed, struct world** world);
 int world_save(int32_t seed);
-int world_get_chunk(struct world* world, vec2 coord, struct chunk** chunk);
+int world_get_chunk(struct world* world, int coord[2], struct chunk** chunk);
+void world_get_chunk_real_coord(struct world* world, vec2 coord, int out[2]);