private void drawPerpPoint(Device device, float x, float y, Color colorWithAlpha)
{
Line line = GraphicViewManager.Instance.ResourceManager.SnapLines[0];
int midWidth = 5;
line.Begin();
line.Draw(new Vector2[] { new Vector2(x - 2.0f * midWidth, y), new Vector2(x, y) }, colorWithAlpha);
line.Draw(new Vector2[] { new Vector2(x, y), new Vector2(x, y + 2.0f * midWidth) }, colorWithAlpha);
line.Draw(new Vector2[] { new Vector2(x - 2.0f * midWidth, y + 2.0f * midWidth), new Vector2(x + 1.5f * midWidth, y + 2.0f * midWidth) }, colorWithAlpha);
line.Draw(new Vector2[] { new Vector2(x - 2.0f * midWidth, y + 2.0f * midWidth), new Vector2(x - 2.0f * midWidth, y - 1.5f * midWidth) }, colorWithAlpha);
line.End();
}
