void CreateGeometry()
{
double r = Diameter / 2;
double l = HeadLength * Diameter;
// arrowhead
var pc = new PointCollection();
pc.Add(new Point(-l, r));
pc.Add(new Point(-l, r * 2));
pc.Add(new Point(0, 0));
var headBuilder = new MeshBuilder();
headBuilder.AddRevolvedGeometry(pc, new Point3D(0, 0, 0), new Vector3D(0, 0, 1), ThetaDiv);
_head = headBuilder.ToMesh();
_head.Freeze();
// body
pc = new PointCollection();
pc.Add(new Point(0, 0));
pc.Add(new Point(0, r));
pc.Add(new Point(1, r));
var bodyBuilder = new MeshBuilder();
bodyBuilder.AddRevolvedGeometry(pc, new Point3D(0, 0, 0), new Vector3D(0, 0, 1), ThetaDiv);
_body = bodyBuilder.ToMesh();
_body.Freeze();
}
void CreateGeometry()
{
double r = Diameter / 2;
var pc = new PointCollection();
pc.Add(new Point(0, 0));
pc.Add(new Point(0, r));
pc.Add(new Point(1, r));
pc.Add(new Point(1, 0));
var builder = new MeshBuilder();
builder.AddRevolvedGeometry(pc, new Point3D(0, 0, 0), new Vector3D(0, 0, 1), ThetaDiv);
_tube= builder.ToMesh();
_tube.Freeze();
}