support multiple columns

1 files changed, 13 insertions, 2 deletions

diff --git a/Scripts/DataDecoder.cs b/Scripts/DataDecoder.cs
index b71f963..ddef18c 100644
--- a/Scripts/DataDecoder.cs
+++ b/Scripts/DataDecoder.cs
@@ -171,12 +171,23 @@ public class DataDecoder : UdonSharpBehaviour
 
   private Color32 GetTileRGB(int tileIdx)
   {
-    int tileY = tileIdx * tileSize;
+    // Calculate which column and position within column this tile is in
+    int tilesPerColumn = readHeight / tileSize;
+    int column = tileIdx / tilesPerColumn;
+    int tileInColumn = tileIdx % tilesPerColumn;
+
+    // Calculate Y position (vertical position within column)
+    int tileY = tileInColumn * tileSize;
     int centerY = tileY + tileSize / 2;
 
+    // Calculate X position (horizontal position based on column)
+    int tileX = column * tileSize;
+    int centerX = tileX + tileSize / 2;
+
     if (centerY >= readHeight) return new Color32();
+    if (centerX >= readWidth) return new Color32();
 
-    int localX = tileSize / 2;
+    int localX = centerX;
     int localY = readHeight - 1 - centerY;
     int index = localY * readWidth + localX;