public static float3 point(ray r, float distance)
{
return(r.origin + distance * r.direction);
}
public static bool equal(ray r0, ray r1)
{
return(all(equal(r0.origin, r1.origin) & equal(r0.direction, r1.direction)));
}
public ray_d(ray r)
{
origin = r.origin;
direction = r.direction;
}