public abstract RtVector LocalNormalAt(RtPoint point, Intersection hit);
public override RtVector LocalNormalAt(RtPoint point, Intersection hit)
{
throw new System.NotImplementedException();
}
private void IntersectTrianle(TriangleGeometry triangleGeometry, IntersectionList intersections, Ray ray)
{
var vertex1 = _vertices[triangleGeometry.Vertex1 - 1];
var vertex2 = _vertices[triangleGeometry.Vertex2 - 1];
var vertex3 = _vertices[triangleGeometry.Vertex3 - 1];
var edge1 = vertex2 - vertex1;
var edge2 = vertex3 - vertex1;
var directionCrossEdge2 = ray.Direction.Cross(edge2);
var determinant = edge1.Dot(directionCrossEdge2);
if (Math.Abs(determinant) < DoubleExtensions.EPSILON)
{
return;
}
var f = 1.0 / determinant;
var point1ToOrigin = ray.Origin - vertex1;
var u = f * point1ToOrigin.Dot(directionCrossEdge2);
if (u < 0 || u > 1)
{
return;
}
var originCrossEdge1 = point1ToOrigin.Cross(edge1);
var v = f * ray.Direction.Dot(originCrossEdge1);
if (v < 0 || (u + v) > 1)
{
return;
}
var t = f * edge2.Dot(originCrossEdge1);
Triangle triangle;
if (_normals.Count > 0)
{
var normal1 = _normals[triangleGeometry.Normal1 - 1];
var normal2 = _normals[triangleGeometry.Normal2 - 1];
var normal3 = _normals[triangleGeometry.Normal3 - 1];
triangle = new Triangle(vertex1, vertex2, vertex3, normal1, normal2, normal3);
}
else
{
triangle = new Triangle(vertex1, vertex2, vertex3);
}
triangle.Parent = this;
triangle.InheritMaterial = true;
var intersection = new Intersection
{
Shape = triangle,
Time = t,
U = u,
V = v
};
intersections.Add(intersection);
}
public void Add(Intersection intersection)
{
_intersections.Add(intersection);
_sorted = false;
}
