public override double GetHitPointDistance(Ray r)
{
double ret = RayPlane.GetHitPointRayPlaneDistance(r.Origin, r.Direction, Position, LookAt);
if (ret <= Constants.EPS)
{
return(double.PositiveInfinity);
}
return(ret);
}
/// <summary>
/// Evaluate one side of the cube for collision
/// </summary>
/// <param name="ray"></param>
/// <param name="normal"></param>
/// <param name="center"></param>
/// <returns></returns>
private double SideRayIntersectionDistance(Shapes.Ray ray, Vect3 normal, Vect3 center)
{
var distance = RayPlane.GetHitPointRayPlaneDistance(ray.Origin, ray.Direction, center, normal);
if (double.IsInfinity(distance))
{
return(distance);
}
var relativeHitPoint = (ray.Origin + (ray.Direction * distance)) - center;
if (relativeHitPoint.X <= _halfWidth && relativeHitPoint.Y <= _halfWidth && relativeHitPoint.Z <= _halfWidth)
{
return(distance);
}
return(double.PositiveInfinity);
}
