glCamera.h

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/*
 * Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
 *
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 * Software is furnished to do so, subject to the following conditions:
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 * The above copyright notice and this permission notice shall be included in
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#ifndef __GL_CAMERA_H__
#define __GL_CAMERA_H__
 
 
#include <stdint.h>
#include <stdio.h>
 
 
class glCamera
{
public:
        enum CameraMode
        {
                LookAt,         
                YawPitchRoll,   
                Ortho           
        };
        
        static glCamera* Create( CameraMode mode, int registerEvents=0 );
 
        static glCamera* Create( int registerEvents=0 );
 
        ~glCamera();
        
        void Activate();
 
        void Activate( CameraMode mode );
 
        void Deactivate();
 
        inline CameraMode GetCameraMode() const                                         { return mMode; }
 
        inline void SetCameraMode( CameraMode mode )                                    { mMode = mode; }
 
        inline void SetFOV( float fov )                                                 { mFoV = fov; }
 
        inline void SetClippingPlane( float near, float far )                   { mNear = near; mFar = far; }
 
        inline void SetNear( float near )                                                       { mNear = near; }
 
        inline void SetFar( float far )                                                 { mFar = far; }
 
        inline void SetEye( float x, float y, float z )                         { mEye[0] = x; mEye[1] = y; mEye[2] = z; }
 
        inline void SetLookAt( float x, float y, float z )                      { mLookAt[0] = x; mLookAt[1] = y; mLookAt[2] = z; }
 
        inline void SetRotation( float yaw, float pitch, float roll )   { mRotation[0] = pitch; mRotation[1] = yaw; mRotation[2] = roll; }
 
        inline void SetYaw( float yaw )                                                 { mRotation[1] = yaw; }
 
        inline void SetPitch( float pitch )                                             { mRotation[0] = pitch; }
 
        inline void SetRoll( float roll )                                                       { mRotation[2] = roll; }
 
        inline void SetMovementSpeed( float speed )                                     { mMovementSpeed = speed; }
 
        inline void SetMovementEnabled( bool enabled )                          { mMovementEnabled = enabled; }
 
        void StoreDefaults();
 
        void Reset();
 
        void RegisterEvents( uint32_t display=0 );
        
private:
        glCamera( CameraMode mode );
 
        bool mouseInViewport() const;
 
        bool onEventLookAt( uint16_t msg, int a, int b );
        bool onEventYawPitchRoll( uint16_t msg, int a, int b );
 
        static bool onEvent( uint16_t msg, int a, int b, void* user );
 
        CameraMode mMode;
 
        float mNear;
        float mFar;
        float mFoV;
 
        float mEye[3];          // camera location
        float mRotation[3];     // pitch/yaw/roll euler angles
        float mLookAt[3];       // look-at point
        float mUp[3];           // up direction
 
        float mDefaultEye[3];
        float mDefaultRotation[3];
        float mDefaultLookAt[3];
 
        float mPrevModelView[16];
        float mPrevProjection[16];
 
        float mMovementSpeed;
        bool  mMovementEnabled;
        
        void* mDisplay;
        int   mViewport[4];
        bool  mMouseActive;
};
 
#endif