/*
* Copyright (C) 2016 Google, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SIMULATION_H
#define SIMULATION_H
#include <memory>
#include <random>
#include <vector>
#include <glm/glm.hpp>
#include "Meshes.h"
class Animation {
public:
Animation(unsigned rng_seed, float scale);
glm::mat4 transformation(float t);
private:
struct Data {
glm::vec3 axis;
float speed;
float scale;
glm::mat4 matrix;
};
std::mt19937 rng_;
std::uniform_real_distribution<float> dir_;
std::uniform_real_distribution<float> speed_;
Data current_;
};
class Curve;
class Path {
public:
Path(unsigned rng_seed);
glm::vec3 position(float t);
private:
struct Subpath {
glm::vec3 origin;
float start;
float end;
float now;
std::shared_ptr<Curve> curve;
};
void generate_subpath();
std::mt19937 rng_;
std::uniform_int_distribution<> type_;
std::uniform_real_distribution<float> duration_;
Subpath current_;
};
class Simulation {
public:
Simulation(int object_count);
struct Object {
Meshes::Type mesh;
glm::vec3 light_pos;
glm::vec3 light_color;
Animation animation;
Path path;
uint32_t frame_data_offset;
glm::mat4 model;
};
const std::vector<Object> &objects() const { return objects_; }
unsigned int rng_seed() { return random_dev_(); }
void set_frame_data_size(uint32_t size);
void update(float time, int begin, int end);
private:
std::random_device random_dev_;
std::vector<Object> objects_;
};
#endif // SIMULATION_H