Fixed flipped polygons not being clockwise.

vchelaru · Dec 23, 2023 · 5126172 · 5126172
1 parent a51ee7c
commit 5126172
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/...nes/FlatRedBallAddOns/FlatRedBall.TileGraphics/FlatRedBall.TileGraphics/LayeredTileMap.cs b/...nes/FlatRedBallAddOns/FlatRedBall.TileGraphics/FlatRedBall.TileGraphics/LayeredTileMap.cs
@@ -858,14 +858,23 @@ private static void ApplyFlip(uint idWithFlip, Polygon cloned)
                     cloned.SetPoint(i, point);
                 }
             }
+            // If we flip, it needs to be made clockwise, but if we flip 2x, it automatically reverts
+            // back to being clockwise
+            var shouldMakeClockwise = false;
             if (flipHorizontally)
             {
+                shouldMakeClockwise = !shouldMakeClockwise;
                 cloned.FlipRelativePointsHorizontally();
             }
             if (flipVertically)
             {
+                shouldMakeClockwise = !shouldMakeClockwise;
                 cloned.FlipRelativePointsVertically();
             }
+            if (shouldMakeClockwise)
+            {
+                cloned.InvertPointOrder();
+            }
         }
 
         private static Polygon AddPolygonCloneAtXY(MapLayer layer, float tileDimension, Polygon polygon, uint[] tiles, long tilesetTileGid, int index,