CameraOffAxis.H

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//========================================================================
// MinVR
// Platform:    Any
// API version: 1.0
//------------------------------------------------------------------------
// The MIT License (MIT)
//
// Copyright (c) 2013 Regents of the University of Minnesota
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//========================================================================

#ifndef CAMERAOFFAXIS_H
#define CAMERAOFFAXIS_H

#include <glm/glm.hpp>
#include <glm/gtc/matrix_access.hpp>
#include "MVRCore/AbstractCamera.H"
#include "MVRCore/StringUtils.H"

namespace MinVR {

class CameraOffAxis : public AbstractCamera
{
public:
        CameraOffAxis(glm::vec3 topLeft, glm::vec3 topRight, glm::vec3 botLeft, glm::vec3 botRight,
                                  glm::mat4 initialHeadFrame, double interOcularDistance, double nearClipDist, double farClipDist);

        virtual ~CameraOffAxis();

        virtual void updateHeadTrackingFrame(glm::mat4 newHeadFrame);

        virtual void applyProjectionAndCameraMatrices();

        virtual void applyProjectionAndCameraMatricesForLeftEye();

        virtual void applyProjectionAndCameraMatricesForRightEye();

        virtual void setObjectToWorldMatrix(glm::mat4 obj2World);

        glm::mat4 getLeftEyeFrame();

        glm::mat4 getRightEyeFrame();

protected:

        glm::vec3 _topLeft;
        glm::vec3 _topRight;
        glm::vec3 _botLeft;
        glm::vec3 _botRight;
        glm::mat4 _headFrame;
        double _iod;
        double _nearClip;
        double _farClip;
        double _halfWidth;
        double _halfHeight;
        glm::mat4 _room2tile;

        glm::mat4 _projection;
        glm::mat4 _projectionLeft;
        glm::mat4 _projectionRight;
        glm::mat4 _view;
        glm::mat4 _viewLeft;
        glm::mat4 _viewRight;
        glm::mat4 _object2World;

        glm::mat4 _currentViewMatrix;

        virtual void applyProjectionAndCameraMatrices(const glm::mat4& projectionMat, const glm::mat4& viewMat);
        glm::mat4 invertYMat();
        glm::mat4 perspectiveProjection(double left, double right, double bottom, double top, double nearval, double farval, float upDirection = -1.0);

};

} //end namespace
#endif