VBOByScreen.h

/********************************************************************/
/* Copyright (c) 2015 DG Technologies Inc. and Yuzi Mizuno          */
/* All rights reserved.                                             */
/********************************************************************/
#if !defined( __VBOBYSCREEN_H__)
#define __VBOBYSCREEN_H__

#include "mgGL/VBO.h"

class MGPosition;


class MG_DLL_DECLR mgVBOByScreen:public mgVBO{

public:

mgVBOByScreen(float z=-1.f):m_z(z){m_coordinateType = mgGLSL::NdcScreen;};
    
void convert2NormalizedWorld(
    const int xyS[2],   
    float& x,           
    float& y            
);
    
void convert2NormalizedWorld(
    float x0,   
    float y0,   
    float& x,   
    float& y    
);

float getHeight()const{return m_heightHalf*2.f;};
float getWidth()const{return m_widthHalf*2.f;};

void set_viewport(const int vport[4]);

//Set the ormalized device coordinates z value (in NDC) to control depth test.
void set_ZValue(float z){m_z=z;};

void Vertex(const int v[2]);
void Vertex(int x, int y);

void Vertex(const MGPosition& v);
void Vertex(float x, float y, float z=0.0f);
void Vertex3d(double x, double y, double z=0.0);
void Vertex2fv(const float v[2]);
void Vertex3fv(const float v[3]);
void Vertex2dv(const double v[2]);
void Vertex3dv(const double v[3]);

protected:

    float m_centerX, m_centerY;
    float m_widthHalf, m_heightHalf;
    float m_z;

};
 // end of DisplayHandling group
#endif //__VBOBYSCREEN_H__