#include "scene.h"
#include "glassert.h"
#include <glm/glm.hpp>
#include <glm/ext.hpp>
#include "camera.h"

Scene::Scene()
{

}

Scene::~Scene()
{
    for(Entity* e : entities)
        delete(e);
}

void Scene::addEntity(Mesh* mesh, Material* mat)
{
    entities.push_back(new Entity(NULL, mesh, mat));
}

void Scene::drawEntities()
{
    glm::mat4 viewMatrix = camera->getViewMatrix();
    glm::mat4 projectionMatrix = camera->getProjectionMatrix();
    for(Entity* e : entities)
    {
        glm::mat4 modelViewMatrix = viewMatrix * e->modelMatrix;
        glm::mat4 mvp = projectionMatrix * modelViewMatrix;
        Shader* shader = e->mat->getShader();
        shader->bind();
        e->mat->bindAttributes();
        shader->bindMatrix(shader->getLocation("viewMatrix"), viewMatrix);
        shader->bindMatrix(shader->getLocation("modelViewMatrix"), modelViewMatrix);
        shader->bindMatrix(shader->getLocation("MVP"), mvp);
        e->mesh->draw();
    }
}

void Scene::setCamera(Camera* myCamera)
{
    camera = myCamera;
}

Camera* Scene::getCamera()
{
    return camera;
}