Plane.cpp

#include "Object.hpp"

Plane::Plane(const Material& mat, const Vector& center, const Vector& color, const Vector& rotation) :
    Object (mat, 0, center, color, rotation)
{
    type = 0;
}

Vector Plane::color(const Vector& hit) const {
    if (((int) hit.x_ % 50 > 25 || (int) hit.x_ % 50 > -25) ^
        ((int) hit.z_ % 50 > 25 || (int) hit.z_ % 50 > -25))
        return {0.1, 0.1, 0.1};

    return color_;
}

VectorPair Plane::trace(const Ray& ray, Vector* norm) const {
    *norm = rotation_ * sign((ray.start_ - center_) ^ rotation_);

    double D = -center_ ^ *norm, den = ray.dir_ ^ *norm;
    
    if (den < 0) {
        double dist = -(D + (ray.start_ ^ *norm)) / den;

        Vector hit = ray.start_ + ray.dir_ * dist;

        return {hit, hit}; //???
    }

    return {NULLVEC, NULLVEC};
}