add chunk offset to rendering

1 files changed, 11 insertions, 2 deletions

diff --git a/src/tiled.h b/src/tiled.h
index c3d0950..de469be 100644
--- a/src/tiled.h
+++ b/src/tiled.h
@@ -5,13 +5,22 @@
 #define SCREEN_W 1280
 #define SCREEN_H 720
 
+#define RENDER_DISTANCE 16
+
 typedef struct Tiled {
     TiledMap tiledMap;
     float zoom;
+    
+    // main viewport offset
     Vector2 offset;
 
+    // offset passed to shader for rendering
+    Vector2 renderOffset;
+    // offset used to calculate which chunks to render
+    int chunkOffset[2];
+
     int atlasSize[2];
-    int mapSize[2];
+    int renderArea[2];
 
     Texture2D atlasTexture;
 
@@ -23,7 +32,7 @@ typedef struct Tiled {
     int offsetLoc;
 
     int atlasSizeLoc;
-    int mapSizeLoc;
+    int renderAreaLoc;
 
     int atlasTextureLoc;
     int tilemapTextureLoc;