#pragma once

#include "Camera.h"

#include <glm/glm.hpp>

using namespace glm;

class Camera3D : public Camera
{
public:
	Camera3D(
		float fov_y,
		float aspect_ratio,
		float znear,
		float zfar,
		const vec3& position,
		const vec3& forward = vec3(0.0f, 0.0f, 1.0f),
		const vec3& up = vec3(0.0f, 1.0f, 0.0f),
		const vec3& right = vec3(0.0f) // Zero for auto-calculated
	);

	void update_frustum(float fov_y, float aspect_ratio, float znear, float zfar);
	void update_position(const vec3& position);
	// Updates the orientation based on three vectors.
	// If right is equal to zero it is calculated with glm::cross(forward, up).
	// Then the true up is calculated with glm::cross(right, forward)
	void update_orientation(const vec3& forward = vec3(0.0f, 0.0f, 1.0f), const vec3& up = vec3(0.0f, 1.0f, 0.0f), const vec3& right = vec3(0.0f));
	// Directly sets the forward, up, and right values.
	void direct_update_orientation(const vec3& forward, const vec3& up, const vec3& right);

	void translate(const vec3& translation);
	void rotate(const vec3& axis, float angle);

	void prerender();

	const vec3& get_position() const { return m_position; }
	vec3 get_forward() const { return vec3(m_forward); }
	vec3 get_up() const { return vec3(m_up); }
	vec3 get_right() const { return vec3(m_right); }

private:
	vec3 m_position;
	vec4 m_forward;
	vec4 m_up;
	vec4 m_right;
};