public static void AddDiamond(this GraphicsPath graphicsPath, RectangleF rect)
{
PointF p1 = new PointF(rect.X + rect.Width / 2.0f, rect.Y);
PointF p2 = new PointF(rect.X + rect.Width, rect.Y + rect.Height / 2.0f);
PointF p3 = new PointF(rect.X + rect.Width / 2.0f, rect.Y + rect.Height);
PointF p4 = new PointF(rect.X, rect.Y + rect.Height / 2.0f);
graphicsPath.AddPolygon(new PointF[] { p1, p2, p3, p4 });
}
public static void AddPolygon(this GraphicsPath graphicsPath, RectangleF rect, int sideCount)
{
PointF[] points = new PointF[sideCount];
float a = 0;
for (int i = 0; i < sideCount; i++)
{
points[i] = new PointF(rect.X + ((rect.Width / 2.0f) * (float)Math.Cos(a)) + rect.Width / 2.0f,
rect.Y + ((rect.Height / 2.0f) * (float)Math.Sin(a)) + rect.Height / 2.0f);
a += (float)Math.PI * 2.0f / sideCount;
}
graphicsPath.AddPolygon(points);
}
public static void AddTriangle(this GraphicsPath graphicsPath, RectangleF rect, TriangleAngle angle = TriangleAngle.Top)
{
PointF p1, p2, p3;
switch (angle)
{
default:
case TriangleAngle.Top:
p1 = new PointF(rect.X + rect.Width / 2.0f, rect.Y);
p2 = new PointF(rect.X, rect.Y + rect.Height);
p3 = new PointF(rect.X + rect.Width, rect.Y + rect.Height);
break;
case TriangleAngle.Right:
p1 = new PointF(rect.X + rect.Width, rect.Y + rect.Height / 2.0f);
p2 = new PointF(rect.X, rect.Y);
p3 = new PointF(rect.X, rect.Y + rect.Height);
break;
case TriangleAngle.Bottom:
p1 = new PointF(rect.X + rect.Width / 2.0f, rect.Y + rect.Height);
p2 = new PointF(rect.X + rect.Width, rect.Y);
p3 = new PointF(rect.X, rect.Y);
break;
case TriangleAngle.Left:
p1 = new PointF(rect.X, rect.Y + rect.Height / 2.0f);
p2 = new PointF(rect.X + rect.Width, rect.Y + rect.Height);
p3 = new PointF(rect.X + rect.Width, rect.Y);
break;
}
graphicsPath.AddPolygon(new PointF[] { p1, p2, p3 });
}
