private void UpdateRotationHandlePosition()
{
GraphicalUiElement singleSelectedObject = null;
if (selectedObjects.Count == 1)
{
singleSelectedObject = selectedObjects[0];
}
if (singleSelectedObject == null)
{
// hide the rotation handles
rotationHandle.Visible = false;
}
else
{
rotationHandle.Visible = true;
// right side
const float minimumOffset = 24;
float xOffset = 0;
if (singleSelectedObject.XOrigin == HorizontalAlignment.Left)
{
xOffset = singleSelectedObject.GetAbsoluteWidth() + minimumOffset;
}
else if (singleSelectedObject.XOrigin == HorizontalAlignment.Center)
{
xOffset = singleSelectedObject.GetAbsoluteWidth() / 2.0f + minimumOffset;
}
else if (singleSelectedObject.XOrigin == HorizontalAlignment.Right)
{
xOffset = minimumOffset;
}
var offset = new Vector2(
xOffset,
0);
MathFunctions.RotateVector(
ref offset, -MathHelper.ToRadians(singleSelectedObject.GetAbsoluteRotation()));
rotationHandle.X = singleSelectedObject.AbsoluteX + offset.X;
// consider the Y
rotationHandle.Y = singleSelectedObject.AbsoluteY + offset.Y;
rotationHandle.Radius = 8 / Renderer.Self.Camera.Zoom;
}
}
private static void GetSelectedAbsoluteXAndY(GraphicalUiElement asGue, bool parentFlips, out float selectedObjectX, out float selectedObjectY)
{
selectedObjectX = asGue.AbsoluteX;
selectedObjectY = asGue.AbsoluteY;
if (parentFlips)
{
var rotationMatrix = asGue.GetAbsoluteRotationMatrix();
Vector3 offset = new Vector3(asGue.GetAbsoluteWidth(), 0, 0);
offset = Vector3.Transform(offset, rotationMatrix);
selectedObjectX += offset.X;
selectedObjectY += offset.Y;
}
}
