#include "InfinitePlane.h"
#include "RenderObject.h"
#include <iostream>

raytry::InfinitePlane::InfinitePlane() : zLevel{0.0f}, normalVec{0.0, 0.0, 1.0} {}

raytry::InfinitePlane::InfinitePlane(float zLevel, QVector3D normalVec) : zLevel{zLevel}, normalVec{normalVec} {}

std::optional<float> raytry::InfinitePlane::intersects(const Ray &ray) const {
    auto normalDotDir = QVector3D::dotProduct(normalVec, ray.directionVec);
    if (qFuzzyIsNull(normalDotDir)) {
        return std::nullopt;
    }
    auto t = (-QVector3D::dotProduct(normalVec, ray.originVec) - zLevel) / normalDotDir;
    if (t < RenderObject::nearCrop) {
        return std::nullopt;
    } else {
        return std::make_optional<float>(t);
    }
}

raytry::RenderMaterial raytry::InfinitePlane::material() const {
    return {{240, 240, 240}};
}

QVector3D raytry::InfinitePlane::calculateNormal(QVector3D hitpoint) const {
    return normalVec;
}