#ifndef Magnum_SceneGraph_Camera3D_hpp
#define Magnum_SceneGraph_Camera3D_hpp
/*
    Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz>

    This file is part of Magnum.

    Magnum is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License version 3
    only, as published by the Free Software Foundation.

    Magnum is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU Lesser General Public License version 3 for more details.
*/

/** @file
 * @brief @ref compilation-speedup-hpp "Template implementation" for Camera3D.h
 */

#include "AbstractCamera.hpp"
#include "Camera3D.h"

using namespace std;

namespace Magnum { namespace SceneGraph {

template<class T> Camera3D<T>* Camera3D<T>::setOrthographic(const Math::Vector2<T>& size, T near, T far) {
    _near = near;
    _far = far;

    Math::Vector2<T> xyScale = T(2.0)/size;
    T zScale = T(2.0)/(near-far);

    AbstractCamera<3, T>::rawProjectionMatrix = Math::Matrix4<T>(
        xyScale.x(),    T(0.0),         T(0.0),         T(0.0),
        T(0.0),         xyScale.y(),    T(0.0),         T(0.0),
        T(0.0),         T(0.0),         zScale,         T(0.0),
        T(0.0),         T(0.0),         near*zScale-1,  T(1.0)
    );

    AbstractCamera<3, T>::fixAspectRatio();
    return this;
}

template<class T> Camera3D<T>* Camera3D<T>::setPerspective(T fov, T near, T far) {
    _near = near;
    _far = far;

    T xyScale = T(1.0)/tan(fov/2); /* == near/size */
    T zScale = T(1.0)/(near-far);

    AbstractCamera<3, T>::rawProjectionMatrix = Matrix4(
        xyScale,    T(0.0),     T(0.0),                 T(0.0),
        T(0.0),     xyScale,    T(0.0),                 T(0.0),
        T(0.0),     T(0.0),     (far+near)*zScale,      T(-1.0),
        T(0.0),     T(0.0),     (2*far*near)*zScale,    T(0.0)
    );

    AbstractCamera<3, T>::fixAspectRatio();
    return this;
}

}}

#endif