public bool Intersects(Triangle3 triangle)
{
var v0 = triangle.point2 - triangle.point1;
var v1 = triangle.point3 - triangle.point1;
var v2 = this - triangle.point1;
float dot00 = v0.Dot();
float dot01 = v0.Dot(v1);
float dot02 = v0.Dot(v2);
float dot11 = v1.Dot();
float dot12 = v1.Dot(v2);
float invDenom = 1 / ((dot00 * dot11) - (dot01 * dot01));
float u = ((dot11 * dot02) - (dot01 * dot12)) * invDenom;
float v = ((dot00 * dot12) - (dot01 * dot02)) * invDenom;
return((u > 0) && (v > 0) && ((u + v) < 1));
}
public bool IntersectTriangle(Triangle3 triangle, out Vec3 intersectionPoint)
{
return(IntersectTriangle(triangle, triangle.Normal(), out intersectionPoint));
}
public bool IntersectTriangle(Triangle3 triangle, Vec3 triangleNormal, out Vec3 intersectionPoint)
{
return(IntersectTriangle(triangle.point1, triangle.point2, triangle.point3, triangleNormal, out intersectionPoint));
}
public bool WithinTriangle(Triangle3 triangle)
{
return(WithinTriangle(triangle.point1, triangle.point2, triangle.point3));
}