Quick and dirty terrain texture editing

terrain/Terrain+Editing.cs

@@ -84,6 +84,25 @@ public partial class Terrain
 			NotifyPropertyListChanged();
 		}
 
+		if ((ev is InputEventMouseButton { ButtonIndex: var wheel2, Pressed: var pressed2, CtrlPressed: true })
+		 && (wheel2 is MouseButton.WheelUp or MouseButton.WheelDown) && (_selection != null))
+		{
+			GetViewport().SetInputAsHandled();
+			if (!pressed2) return;
+
+			var amount = (wheel2 == MouseButton.WheelUp) ? 1 : -1;
+			var selection = TileRegion.From(_selection.Value);
+
+			foreach (var pos in selection.GetAllTiles()) {
+				var tile = GetTile(pos);
+				tile.TexturePrimary = PosMod(tile.TexturePrimary + amount, 4);
+				SetTile(pos, tile);
+			}
+
+			UpdateMeshAndShape();
+			NotifyPropertyListChanged();
+		}
+
 		if (ev is InputEventMouseMotion)
 			_unhandledMotion = true;
 	}