|
public AddTriangleStrip ( IList |
||
| stripPositions | IList |
/// The points of the triangle strip. /// |
| stripNormals | IList |
/// The normal vectors of the triangle strip. /// |
| stripTextureCoordinates | IList |
/// The texture coordinates of the triangle strip. /// |
| return | void | |
/// <summary>
/// Do the tessellation and return the <see cref="MeshGeometry3D"/>.
/// </summary>
/// <returns>A triangular mesh geometry.</returns>
protected override MeshGeometry3D Tessellate()
{
var pts = new List<Point3D>();
var right = Vector3D.CrossProduct(this.UpVector, this.Normal);
for (int i = 0; i < this.ThetaDiv; i++)
{
double angle = this.StartAngle + ((this.EndAngle - this.StartAngle) * i / (this.ThetaDiv - 1));
double angleRad = angle / 180 * Math.PI;
var dir = (right * Math.Cos(angleRad)) + (this.UpVector * Math.Sin(angleRad));
pts.Add(this.Center + (dir * this.InnerRadius));
pts.Add(this.Center + (dir * this.OuterRadius));
}
var b = new MeshBuilder(false, false);
b.AddTriangleStrip(pts);
return b.ToMesh();
}
