float AngleBetween(Vector3 other)
{
Vector3 a = GetNormalized();
Vector3 b = other.GetNormalized();
float d = a.x * b.x + a.y * b.y + a.z * b.z;
return((float)Math.Acos(d));
}
public Vector3 ClosestPoint(Vector3 p)
{
Vector3 toPoint = p - center;
if (toPoint.MagnitudeSqr() > radius * radius)
{
toPoint = toPoint.GetNormalized() * radius;
}
return(center + toPoint);
}
float AngleBetween(Vector3 other)
{
// normalise the vectors
Vector3 a = GetNormalized();
Vector3 b = other.GetNormalized();
// calculate the dot product
float d = a.x * b.x + a.y * b.y + a.z * b.z;
// return the angle between them
return((float)Math.Acos(d));
}
