SLGLOculus.h

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/**
 * \file      SLOculus.h
 * \brief   Wrapper around Oculus Rift
 * \date      July 2014
 * \remarks   Please use clangformat to format the code. See more code style on
 *            https://github.com/cpvrlab/SLProject4/wiki/SLProject-Coding-Style
 * \authors   Marc Wacker, Roman Kuehne, Marcus Hudritsch
 * \copyright http://opensource.org/licenses/GPL-3.0
*/
 
#ifndef SLOCULUS_H
#define SLOCULUS_H
 
#include <SLCamera.h>
 
//-----------------------------------------------------------------------------
//! Distorted vertex used to draw in the Oculus frame buffer.
struct SLVertexOculus
{
    SLVec2f screenPosNDC;
    float   timeWarpFactor;
    float   vignetteFactor;
    SLVec2f tanEyeAnglesR;
    SLVec2f tanEyeAnglesG;
    SLVec2f tanEyeAnglesB;
};
 
typedef vector<SLVertexOculus> SLVVertexOculus;
 
//-----------------------------------------------------------------------------
//! Wrapper around Oculus Rift Devkit 2.
/*! This class is depricated since the lib_ovr from Oculus completely changed
The lib_ovr that connects the Oculus hardware was removed since it only worked
for devkit2 under windows.
*/
class SLGLOculus
{
public:
    SLGLOculus(SLstring shaderDir);
    ~SLGLOculus();
 
    void init();
 
    const SLQuat4f& orientation(SLEyeType eye);
    const SLVec3f&  position(SLEyeType eye);
 
    const SLVec3f& viewAdjust(SLEyeType eye);
    const SLMat4f& projection(SLEyeType eye);
    const SLMat4f& orthoProjection(SLEyeType eye);
 
    SLfloat resolutionScale() { return _resolutionScale; }
    void    renderResolution(SLint width, SLint height);
    void    beginFrame();
    void    renderDistortion(SLint          width,
                             SLint          height,
                             SLuint         tex,
                             const SLCol4f& background);
    // Setters
    void lowPersistance(SLbool val);
    void timeWarp(SLbool val);
    void positionTracking(SLbool val);
    void displaySleep(SLbool val);
 
    // Getters
    SLbool isConnected() { return _isConnected; }
    SLbool isCameraConnected() { return _isCameraConnected; }
    SLbool isPositionTracked() { return _isPositionTracked; }
 
    SLbool isPositionTrackingEnabled() { return _positionTrackingEnabled; }
    SLbool isLowPersistanceEnabled() { return _lowPersistanceEnabled; }
    SLbool isTimeWarpEnabled() { return _timeWarpEnabled; }
 
private:
    void dispose();
    void calculateHmdValues(); //!< recalculate HMD settings changed
 
    // SL variables that can be accessed via getters
    SLVec2i _outputRes;                    //!< output resolution used for ortho projection
 
    SLQuat4f        _orientation[2];       //!< eye orientation
    SLVec3f         _position[2];          //!< eye position
    SLMat4f         _projection[2];        //!< projection matrices for left and right eye
    SLMat4f         _orthoProjection[2];   //!< projection for 2d elements
    SLVec3f         _viewAdjust[2];        //!< view adjust vector
    SLGLVertexArray _distortionMeshVAO[2]; //!< distortion meshes for left and right eye
 
    SLfloat _resolutionScale;              //!< required resolution scale for a 1.0 min pixel density
 
    // distortion
    SLbool _usingDebugHmd;           //!< we're using a debug HMD
    SLbool _positionTrackingEnabled; //!< is position tracking enabled
    SLbool _lowPersistanceEnabled;   //!< low persistence rendering enabled
    SLbool _timeWarpEnabled;         //!< time warp correction enabled
    SLbool _displaySleep;            //!< is the display of the rift currently off
 
    SLbool _isConnected;             //!< is HMD connected
    SLbool _isCameraConnected;       //!< is position tracker camera connected
    SLbool _isPositionTracked;       //!< is the position tracked (false if out of range)
 
    SLVec2i _resolution;             //!< Resolution of the HMD
    SLVec2i _rtSize;                 //!< Required resolution for the render target
 
    SLbool _hmdSettingsChanged;      //!< settings need to be updated flag
 
    SLGLProgram* _stereoOculusDistProgram = nullptr;
 
    SLstring _shaderFileDir;
};
//-----------------------------------------------------------------------------
 
#endif