我正在学习OpenGL NeHe制作。当我来阅读第13课位图字体时，我遇到了一个问题。我使用glut编写我的代码。而我的PC系统是Windows7.I在Microsoft Visual Studio 2008上运行我的代码，但没有任何错误，但没有出现在窗口中。我不知道什么是错的。什么可能会导致这个问题普遍？我错过了一些设置？

这是我的代码：

#pragma comment(lib,"GLAUX.LIB")

#include

#include

#include

#include

#include

#include

HDC hDC = NULL;

GLuint base;//the first display list we create

GLfloat cnt1,cnt2;//move on the screen or set color

GLvoid buildFont() // Build Our Bitmap Font

{

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

"Times New Roman"); // Font Name

oldfont = (HFONT)SelectObject(hDC, font); // Selects The Font We Want

wglUseFontBitmaps(hDC, 32, 96, base); // Builds 96 Characters Starting At Character 32

SelectObject(hDC, oldfont); // Selects The Font We Want

DeleteObject(font); // Delete The Font

}

void killFont()

{

glDeleteLists(base,96);

}

void 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

{

printf("the string to print is NULL!\n");

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 - 32); // Sets The Base Character to 32

glCallLists(strlen(text), GL_UNSIGNED_BYTE, text); // Draws The Display List Text

glPopAttrib(); // Pops The Display List Bits

}

int init(GLvoid) // All Setup For OpenGL Goes Here

{

glShadeModel(GL_SMOOTH); // Enable Smooth Shading

glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // Black Background

glClearDepth(1.0f); // Depth Buffer Setup

glEnable(GL_DEPTH_TEST); // Enables Depth Testing

glDepthFunc(GL_LEQUAL); // The Type Of Depth Testing To Do

glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Really Nice Perspective Calculations

buildFont(); // Build The Font

return TRUE; // Initialization Went OK

}

void display() // 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 With NeHe - %7.2f", cnt1); // Print GL Text To The Screen

glutSwapBuffers();// Everything Went OK

}

void spinDisplay()

{

cnt1 += 0.051f;

cnt2 += 0.005f;

printf("cnt1: %f\n",cnt1);

printf("cnt2: %f\n",cnt2);

}

void reshape(int w,int h)

{

if (0 == h)

h = 1;

glViewport(0,0,(GLsizei)w,(GLsizei)h);

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

gluPerspective(60.0f,(GLfloat)w / (GLfloat)h,1,100);

glMatrixMode(GL_MODELVIEW);

glLoadIdentity();

}

int main(int argc,char** argv)

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);

glutInitWindowSize(600,600);

glutInitWindowPosition(100,100);

glutCreateWindow("Bitmap Fonts");

init();

glutDisplayFunc(display);

glutReshapeFunc(reshape);

glutIdleFunc(spinDisplay);

//glutKeyboardFunc(keyboard);

glutMainLoop();

killFont();

return 0;

}这是Visual Studio 2008的结果：