fixing client color check

src/core/utils.js

@@ -123,9 +123,12 @@ export function getPixelFromChunkOffset(
   return [x, y];
 }
 
-export function getCellInsideChunk(pixel: Cell): Cell {
+export function getCellInsideChunk(
+  canvasSize: number,
+  pixel: Cell,
+): Cell {
   // TODO assert is positive!
-  return pixel.map((x) => mod(x, TILE_SIZE));
+  return pixel.map((x) => mod(x + canvasSize / 2, TILE_SIZE));
 }
 
 export function screenToWorld(

src/ui/ChunkLoader2D.js

@@ -72,7 +72,7 @@ class ChunkLoader {
       return 0;
     }
     return chunk.getColorIndex(
-      getCellInsideChunk([x, y]),
+      getCellInsideChunk(canvasSize, [x, y]),
     );
   }