ray operator *(const tmat &l, ray r)
{
r.origin = transformPt(l, r.origin);
r.direction = transformVec(l, r.direction);
return r;
}
Vector Instance::getRandomPoint(Vector n,double t)
{
auto m = makeMatrices(t);
auto n_ = transformVec(m.second, n);
n_.normalize();
auto p = i->getRandomPoint(n_,t);
return transformLoc(m.first, p);
}
std::pair<boost::optional<double>,HitRecord> Instance::hit(Ray r)
{
auto m = makeMatrices(r.time);
Ray tr;
tr.time = r.time;
tr.depth = r.depth;
tr.origin = transformLoc(m.second, r.origin);
tr.direction = transformVec(m.second, r.direction);
tr.direction.normalize();
auto hit = i->hit(tr);
if(hit.first)
{
hit.second.r = r;
hit.second.at = transformLoc(m.first, hit.second.at);
hit.second.n = transformVec(m.first, hit.second.n);
hit.second.n.normalize();
hit.first = (hit.second.at - r.origin).length();
}
return hit;
}