我使用OpenGL的glLineStipple（）函数来绘制一条虚线。一切都是正确的，但没有虚线显示在输出屏幕上。输出屏幕完全空白。
下面是我的代码：

#include <Windows.h>
#include <GL\glew.h>
#include <GL\glut.h>
#include <GL\freeglut.h>

void myInit()
{
    glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
}
void Display()
{
    glClear(GL_COLOR_BUFFER_BIT);
    glEnable(GL_LINE_STIPPLE);
    glLineStipple(1, 0x00FF); // Pattern: 0x00FF, Factor: 1
    glBegin(GL_LINES);
    glVertex2f(-0.5f, 0.0f);
    glVertex2f(0.5f, 0.0f);
    glEnd();
    glDisable(GL_LINE_STIPPLE);
    glFlush();
}
int main(int argc, char** argv)
{
    glutInit(&argc, argv);//Initialize the GLUT Library
    glutInitDisplayMode(GLUT_SINGLE);
    glutInitWindowSize(700, 500);
    glutInitWindowPosition(0, 0);
    glutCreateWindow("LineStipple");
    myInit();
    glutDisplayFunc(Display);//Callback Function
    glutMainLoop();
    return 0;
}