| public ProjectToSurface ( Vector3D p ) : Vector3D | ||
| p | Vector3D | |
| Résultat | Vector3D | |
/// <summary>
/// Calculates the point of our simplex that is at the middle of an edge.
/// </summary>
private static Vector3D MidEdgePointBall(int p, int q, int r)
{
// We need the mid-radius, but we have to do the calculation
// with our Euclidean simplex mirrors (to avoid infinities that happen in the formulas).
Circle3D edge = HoneycombEdgeUHS(p, q, r);
if (edge.Radius == 0)
{
return(edge.Center);
}
Geometry cellGeometry = Geometry2D.GetGeometry(p, q);
switch (cellGeometry)
{
case Geometry.Spherical:
{
Sphere sphereInBall = H3Models.UHSToBall(new Sphere()
{
Center = edge.Center, Radius = edge.Radius
});
Vector3D mid = sphereInBall.ProjectToSurface(new Vector3D()); // Project origin to sphere.
return(mid);
}
case Geometry.Euclidean:
{
Vector3D mid = H3Models.UHSToBall(edge.Center + new Vector3D(0, 0, edge.Radius));
return(mid);
}
case Geometry.Hyperbolic:
{
throw new System.NotImplementedException();
}
}
throw new System.ArgumentException();
}
/// <summary>
/// Given a geodesic sphere, find the point closest to the origin.
/// </summary>
public static Vector3D ClosestToOrigin( Sphere s )
{
return s.ProjectToSurface( new Vector3D() );
}
