move headers to separate directory

include/worldgen.h

@@ -0,0 +1,27 @@
+#ifndef H_WORLDGEN
+#define H_WORLDGEN
+
+#include <stdint.h>
+
+// For best performance, CHUNK_SIZE should be a power of 2
+#define CHUNK_SIZE 8
+// Terrain low point - should start a bit below sea level for rivers/lakes
+#define TERRAIN_BASE_HEIGHT 60
+// Center point of cave generation
+#define CAVE_BASE_DEPTH 24
+
+typedef struct {
+  short x;
+  short z;
+  uint32_t hash;
+} ChunkAnchor;
+
+uint32_t getChunkHash (short x, short z);
+int getHeightAt (int rx, int rz, int _x, int _z, uint32_t chunk_hash);
+uint8_t getTerrainAt (int x, int y, int z, ChunkAnchor anchor);
+uint8_t getBlockAt (int x, int y, int z);
+
+extern uint8_t chunk_section[4096];
+void buildChunkSection (int x, int y, int z);
+
+#endif