protected (bool, float, float, float) TestLocalIntersection(Ray localRay)
{
Tuple dirCrossE2 = localRay.Direction.Cross(E2);
float det = E1.Dot(dirCrossE2);
if (Abs(det) < Constants.floatEps)
{
return(false, 0, 0, 0);
}
float invDet = 1.0f / det;
Tuple p1ToOrigin = localRay.Origin - P1;
float u = invDet * p1ToOrigin.Dot(dirCrossE2);
if (u < 0 || u > 1)
{
return(false, 0, 0, 0);
}
Tuple originCrossE1 = p1ToOrigin.Cross(E1);
float v = invDet * localRay.Direction.Dot(originCrossE1);
if (v < 0 || (u + v) > 1)
{
return(false, 0, 0, 0);
}
float t = invDet * E2.Dot(originCrossE1);
return(true, t, u, v);
}
protected internal override IntersectionList LocalIntersect(Ray localRay)
{
Vector directionCrossE2 = localRay.Direction.Cross(E2);
double determinant = E1.Dot(directionCrossE2);
if (determinant.IsApproximatelyEqual(0))
{
return(IntersectionList.Empty);
}
double f = 1.0 / determinant;
Vector p1ToOrigin = localRay.Origin - P1;
double u = f * p1ToOrigin.Dot(directionCrossE2);
if (u < 0 || u > 1)
{
return(IntersectionList.Empty);
}
Vector originCrossE1 = p1ToOrigin.Cross(E1);
double v = f * localRay.Direction.Dot(originCrossE1);
if (v < 0 || u + v > 1)
{
return(IntersectionList.Empty);
}
double t = f * E2.Dot(originCrossE1);
return(new IntersectionList(new Intersection(t, this, u, v)));
}
protected override Intersections LocalIntersect(Ray ray)
{
var results = new Intersections();
var dirCrossE2 = ray.Direction.Cross(E2);
var det = E1.Dot(dirCrossE2);
if (Math.Abs(det) < MathHelper.Epsilon)
{
return(results);
}
var f = 1.0 / det;
var p1ToOrigin = new Vector(ray.Origin - P1);
var u = f * p1ToOrigin.Dot(dirCrossE2);
if ((u < 0) || (u > 1))
{
return(results);
}
var originCrossE1 = p1ToOrigin.Cross(E1);
var v = f * ray.Direction.Dot(originCrossE1);
if ((v < 0) || (u + v > 1))
{
return(results);
}
var t = f * E2.Dot(originCrossE1);
results.Add(new Intersection(t, this, u, v));
return(results);
}
