/// <summary>Creates a plane from 3 points that are directly on that plane.</summary>
/// <param name="pointOnPlane1">First point on the plane.</param>
/// <param name="pointOnPlane2">Second point on the plane.</param>
/// <param name="pointOnPlane3">Third point on the plane.</param>
public Plane(Vec3 pointOnPlane1, Vec3 pointOnPlane2, Vec3 pointOnPlane3)
{
Vec3 dir1 = pointOnPlane2 - pointOnPlane1;
Vec3 dir2 = pointOnPlane2 - pointOnPlane3;
normal = Vec3.Cross(dir1, dir2);
d = -Vec3.Dot(pointOnPlane2, normal);
}
