Scene.cpp

#include "Scene.hpp"
#include "Medium.hpp"

bool Scene::IntersectPred(const Ray& ray, float max) const{
    return scene_bvh->IntersectPred(ray, max);
}

bool Scene::IntersectTr(Ray ray, SurfaceInteraction& interaction, glm::vec3& Tr, float max) const{
    Tr = { 1,1,1 };
    while(max > 0){
        bool hit = Intersect(ray, interaction, max);

        if(!hit){
            if(ray.medium)
                Tr *= ray.medium->Tr(ray, max);

            return false;
        }

        if(ray.medium)
            Tr *= ray.medium->Tr(ray, interaction.t);

        if(interaction.mat != nullptr)
            return true;
        ray = Ray(ray.at(interaction.t), ray.dir, ray.time, interaction.getMedium(ray.dir));
        max -= interaction.t;
    }
    return false;
}

bool Scene::Intersect(const Ray& ray, SurfaceInteraction& interaction, float max) const{
    return scene_bvh->Intersect(ray, interaction, max);
}

void Scene::Add(const std::shared_ptr<Primitive>& ptr){
    primitives.push_back(ptr);
}

std::vector<std::shared_ptr<Light>> Scene::GetLights() const{
    std::vector<std::shared_ptr<Light>> lights = scene_bvh->GetLights();
    lights.insert(lights.end(), infiniteLights.begin(), infiniteLights.end());
    return lights;
}


AABB Scene::BoundingBox() const{
    return scene_bvh->BoundingBox();
}

std::shared_ptr<Medium> Scene::GetMedium() const{
    return sceneMedium;
}

void Scene::SetMedium(const std::shared_ptr<Medium>& medium){
    sceneMedium = medium;
}