4.Texture

4.1 Texture として使用する BMP ファイルを用意

tiger.bmp

cow.bmp

4.2 XXXView.h に以下のメンバー変数追加

    CDC*    m_pDC ;     // Device Context 
    HGLRC   m_GLRC  ;   // OpenGL Rendering Context

    GLfloat m_rAngle ;  // Rotation angle

    AUX_RGBImageRec*  m_pRGBImage ; // RGB image area pointer

4.3 OnCreate を以下のように変更

int CXXXView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CView::OnCreate(lpCreateStruct) == -1)
            return -1;

    m_pDC = new CClientDC(this) ;             // Get device context
    SetDCPixelFormat(m_pDC->m_hDC) ;          // Set OpenGL pixel format
    m_GLRC = wglCreateContext (m_pDC->m_hDC); // Create rendering context
    wglMakeCurrent (m_pDC->m_hDC, m_GLRC);    // Current context set
    InitGL() ;                                // Initalize OpenGL
                                              // DIB Image load
    m_pRGBImage = auxDIBImageLoad("tiger.bmp"); // Tiger BMP
    //m_pRGBImage = auxDIBImageLoad("cow.bmp"); // Cow   BMP
                                                // Texture setup
    TexGL(m_pRGBImage->sizeX, m_pRGBImage->sizeY, m_pRGBImage->data) ;	

    return 0;
}

4.4 OnDestroy を以下のように変更

void CXXXView::OnDestroy() 
{
    CView::OnDestroy();

    free( m_pRGBImage->data) ;   // free DIB image area
    free( m_pRGBImage );

    wglMakeCurrent (NULL, NULL); // free current context
    wglDeleteContext (m_GLRC);   // Delete rendering context
    delete m_pDC ;               // Release device context	
}

4.5 TexGL

GLint TexGL(GLsizei width, GLsizei height, const GLvoid *pixels)
{
    glNewList(2, GL_COMPILE) ;

        glPixelStorei(GL_UNPACK_ALIGNMENT, 1) ;

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S    , GL_REPEAT) ;
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T    , GL_REPEAT) ;
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR) ;
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR) ;

        glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE) ;

        glTexImage2D(GL_TEXTURE_2D, 0, 3, width, height,
                      0, GL_RGB, GL_UNSIGNED_BYTE,pixels) ;

    glEndList() ;

    return(0) ;
}

4.6 DrawGL を以下のように変更

GLint DrawGL(GLfloat rAngle)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) ;

    glMatrixMode(GL_MODELVIEW) ;
    glLoadIdentity() ;
    glTranslated(0.0, 0.0, -3.0) ;

    glRotatef(rAngle, 0.0f, 1.0f, 0.0f) ;

    glEnable(GL_TEXTURE_2D ) ;
    glCallList(2) ;    // Texture 

    glEnable(GL_NORMALIZE) ;
    glEnable(GL_AUTO_NORMAL) ;
        auxSolidTeapot(1.0) ;
    glDisable(GL_AUTO_NORMAL) ;
    glDisable(GL_NORMALIZE) ;
    glDisable(GL_TEXTURE_2D ) ;

    return(0) ;
}

4.7 Build and Execute