#include "scene/scene.h"
#include "shader/mirrorshader.h"

MirrorShader::MirrorShader() = default;

Color MirrorShader::shade(Scene const &scene, Ray const &ray) const {
    if (ray.getRemainingBounces() <= 0) {
        return {0, 0, 0};
    }

    Vector3d newDirection = ray.direction - 2 * dotProduct(ray.normal, ray.direction) * ray.normal;

    Ray mirroredRay = Ray(ray.origin + ray.length * ray.direction, newDirection);
    mirroredRay.setRemainingBounces(ray.getRemainingBounces() - 1);

    return scene.traceRay(mirroredRay);
}