成员变量区：
GLuint base;
GLfloat cnt1;
GLfloat cnt2;
成员函数区：
GLvoid COpenGLDemoView::glPrint(const char *fmt, ) // Custom GL "Print" Routine
{
char text[256]; // Holds Our String
va_list ap; // Pointer To List Of Arguments
if (fmt == NULL) // If There's No Text
return; // Do Nothing
va_start(ap, fmt); // Parses The String For Variables
vsprintf(text, fmt, ap); // And Converts Symbols To Actual Numbers
va_end(ap); // Results Are Stored In Text
glPushAttrib(GL_LIST_BIT); // Pushes The Display List Bits
glListBase(base); // Sets The Base Character to 32
glCallLists(strlen(text), GL_UNSIGNED_BYTE, text); // Draws The Display List Text
glPopAttrib(); // Pops The Display List Bits
}
GLvoid COpenGLDemoView::BuildFont(GLvoid)
{
HFONT font; // Windows Font ID
HFONT oldfont; // Used For Good House Keeping
base = glGenLists(96); // Storage For 96 Characters
font = CreateFont( -24, // Height Of Font
0, // Width Of Font
0, // Angle Of Escapement
0, // Orientation Angle
FW_BOLD, // Font Weight
FALSE, // Italic
FALSE, // Underline
FALSE, // Strikeout
ANSI_CHARSET, // Character Set Identifier
OUT_TT_PRECIS, // Output Precision
CLIP_DEFAULT_PRECIS, // Clipping Precision
ANTIALIASED_QUALITY, // Output Quality
FF_DONTCARE|DEFAULT_PITCH, // Family And Pitch
"Courier New"); // Font Name
HDC hDC = ::GetDC(this->m_hWnd);
oldfont = (HFONT)SelectObject(hDC, font); // Selects The Font We Want
wglUseFontBitmaps(hDC, 0, 255, base); // Builds 96 Characters Starting At Character 32
SelectObject(hDC, oldfont); // Selects The Font We Want
DeleteObject(font); // Delete The Font
}
GLvoid COpenGLDemoView::KillFont(GLvoid)
{
glDeleteLists(base,96);
}
GLvoid COpenGLDemoView::KillFont(GLvoid)
{
glDeleteLists(base,96);
}
int COpenGLDemoView::DrawGLScene()
{// Here's Where We Do All The Drawing
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear Screen And Depth Buffer
glLoadIdentity(); // Reset The Current Modelview Matrix
glTranslatef(0.0f,0.0f,-1.0f); // Move One Unit Into The Screen
// Pulsing Colors Based On Text Position
glColor3f(1.0f*float(cos(cnt1)),1.0f*float(sin(cnt2)),1.0f-0.5f*float(cos(cnt1+cnt2)));
// Position The Text On The Screen
glRasterPos2f(-0.45f+0.05f*float(cos(cnt1)), 0.32f*float(sin(cnt2)));
glPrint("Active OpenGL Text - %7.2f", cnt1); // Print GL Text To The Screen
cnt1+=0.051f; // Increase The First Counter
cnt2+=0.005f; // Increase The First Counter
return TRUE; // Everything Went OK
// Everything Went OK
}
本文转自Phinecos(洞庭散人)博客园博客，原文链接：http://www.cnblogs.com/phinecos/archive/2007/08/24/868838.html，如需转载请自行联系原作者
