#pragma once

#include "blitz/common/Vector.h"
#include <memory>
#include <vector>

namespace blitz {

namespace shader {
class BulletShader;
}  // namespace shader


namespace render {

struct Trail {
	Vec3f m_From;
	Vec3f m_To;
	float m_Decay;
};


class BulletRenderer {
  private:
	std::vector<Trail> m_Trails;
	std::unique_ptr<shader::BulletShader> m_Shader;
	unsigned int m_Vbo;

  public:
	BulletRenderer();
	~BulletRenderer();

	void AddBullet(const Vec3f& origin, const Vec3f& direction);
	void Update(float delta);
	void Render();

	void UpdateShader(const Mat4f& proj, const Mat4f& trans) const;
};

}  // namespace render
}  // namespace blitz