inverted panning directions

src/main/java/de/hft/stuttgart/citygml/viewer/Camera.java

@@ -116,7 +116,7 @@ public class Camera {
 		Vector2f dir = new Vector2f(res.x, res.y);
 		dir.normalize();
 		Vector2f yDrag = new Vector2f();
-		dir.mul((float) -dragDiffY * 0.5f, yDrag);
+		dir.mul((float) dragDiffY * 0.5f, yDrag);
 
 		// handle diffY
 		centerPos.add(yDrag.x, yDrag.y, 0);
@@ -126,7 +126,7 @@ public class Camera {
 		float temp = dir.x;
 		dir.x = dir.y;
 		dir.y = -temp;
-		dir.mul((float) dragDiffX * 0.5f);
+		dir.mul((float) -dragDiffX * 0.5f);
 
 		centerPos.add(dir.x, dir.y, 0);
 		eyePos.add(dir.x, dir.y, 0);