www.pudn.com > OpenGLDemoshow.zip > Camera.cpp

#include "stdafx.h" 
#include "Camera.h" 
 
void MyMatrixMult(float* V1,float* V2,float* V3) 
{ 
	 
	glPushMatrix(); 
	glLoadMatrixf(V1); 
	glMultMatrixf(V2); 
	glGetFloatv(GL_MODELVIEW_MATRIX,V3); 
	glPopMatrix(); 
 
} 
CTransferMatrix::CTransferMatrix() 
{ 
	MyIdentity(); 
} 
 
void CTransferMatrix::MyIdentity() 
{    
	int i; 
	for(i=0;i<16;i++)         
	    Matrix[i]=0.0; 
	for(i=0;i<16;i+=5)        
	    Matrix[i]=1.0; 
} 
 
void CTransferMatrix::Load(float* M) 
{ 
	for(int i=0;i<16;i++)     
	    Matrix[i]=M[i]; 
} 
 
 
CScene::CScene() 
{ 
} 
void CScene::RotateRoundAxis(float r,int axis) 
{	glPushMatrix(); 
	glLoadMatrixf(m_TransferMatrix.Matrix); 
	if(axis==AXIS_X) 
	   glRotatef(r,1,0,0); 
	if(axis==AXIS_Y) 
           glRotatef(r,0,1,0); 	 
	if(axis==AXIS_Z) 
	   glRotatef(r,0,0,1);  
        float m_newMatrix[16]; 
	glGetFloatv(GL_MODELVIEW_MATRIX,m_newMatrix); 
	m_TransferMatrix.Load(m_newMatrix); 
	glPopMatrix(); 
} 
 
void CScene::Apply() 
{ 
	glMultMatrixf(m_TransferMatrix.Matrix); 
} 
 
 
 
void CCamera::RotateRoundAxis(float r,int axis) 
{ 
 
 
	glPushMatrix(); 
 
	glLoadMatrixf(m_TransferMatrix.Matrix); 
 
	if(axis==AXIS_X) 
	   glRotatef(r,1,0,0); 
 
	if(axis==AXIS_Y) 
       glRotatef(r,0,1,0); 	 
	 
	if(axis==AXIS_Z) 
	   glRotatef(r,0,0,1);  
   
    float m_newMatrix[16]; 
 
	glGetFloatv(GL_MODELVIEW_MATRIX,m_newMatrix); 
 
	m_TransferMatrix.Load(m_newMatrix); 
 
	glPopMatrix(); 
} 
 
 
CCamera::CCamera() 
{ 
} 
 
void CCamera::Offset(float x,float y,float z) 
{ 
    
	glPushMatrix(); 
	glLoadIdentity(); 
	glTranslatef(x,y,z); 
	float m_tempMatrix[16]; 
	float m_newMatrix[16]; 
	glGetFloatv(GL_MODELVIEW_MATRIX,m_newMatrix); 
     
	MyMatrixMult(m_newMatrix,m_TransferMatrix.Matrix,m_newMatrix); 
	m_TransferMatrix.Load(m_newMatrix); 
	glPopMatrix(); 
} 
 
 
void CCamera::Apply() 
{ 
	glMultMatrixf(m_TransferMatrix.Matrix); 
}