绘制直线虚线点划线
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#include
static GLsizei iMode=1;
int winWidth=400,winHeight=300;
void Initial(void)
{
glClearColor(1.0f,1.0f,1.0f,1.0f);
}
void ChangeSize(int w,int h)
{
winWidth=w;
winHeight=h;
glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0.0,winWidth,0.0,winHeight); }
void Display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0f,0.0f,0.0f);
if(iMode==1)
{
glBegin(GL_LINES);
glVertex2i(110,50);
glVertex2i(150,250);
glEnd();
}
if(iMode==2)
{
glEnable(GL_LINE_STIPPLE);
glLineStipple(2,0X00FF);
glBegin(GL_LINES);
glVertex2i(110,50);
glVertex2i(150,250);
glEnd();
}
if(iMode==3)
{
glEnable(GL_LINE_STIPPLE);
glLineStipple(2,0X087F);
glBegin(GL_LINES);
glVertex2i(110,50);
glVertex2i(150,250);
glEnd();
}
glutSwapBuffers();
}
void ProcessMenu(int value)//菜单函数
{
iMode=value;
glutPostRedisplay();
}
int main(int argc,char*argv[])
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB);
glutInitWindowSize(400,300);
glutInitWindowPosition(100,100);
glutCreateWindow("绘制实线、虚线、点划线");
glutCreateMenu(ProcessMenu);//菜单注册函数
glutAddMenuEntry("绘制直线",1);
glutAddMenuEntry("绘制虚线",2);
glutAddMenuEntry("绘制点划线",3);
glutAttachMenu(GLUT_RIGHT_BUTTON);//右键点开菜单栏
glutDisplayFunc(Display);
glutReshapeFunc(ChangeSize);
Initial();
glutMainLoop();
return 0;
}