@Override
public Vec normalAt(Point3D intersection, Ray ray) {
for (Triangle tri : mesh) {
if (tri.intersectTri(intersection, ray)) {
Vec v1 = new Vec(tri.getP1(), tri.getP0());
Vec v2 = new Vec(tri.getP2(), tri.getP0());
return Vec.crossProd(v1, v2);
}
}
return null;
}
@Override
public Hit nearestIntersection(Ray ray) {
double minDistance = Double.POSITIVE_INFINITY;
Object3D nearestTri = null;
Point3D nearestIntersection = null;
for (Triangle tri : mesh) {
Point3D intersectionPoint = tri.planeIntersection(ray);
if (intersectionPoint != null) {
double length = new Vec(intersectionPoint, ray.origin).length();
length = length / ray.direction.length();
if (length < minDistance && tri.intersectTri(intersectionPoint, ray)) {
minDistance = length;
nearestTri = tri;
nearestIntersection = intersectionPoint;
}
}
}
return new Hit(nearestIntersection, nearestTri, minDistance);
}
