通常这会是这样的:
glutAddMenuEntry("-", <opid>);
但它不起作用。在 Google 上查找后,我找不到太多关于此的信息,也许使用 GLUT 是不可能的?我发现了几个例子,例如:
glutAddMenuEntry("-", 0);
或者
glutAddMenuEntry("-", -1);
但都没有工作...
#include <math.h>
#include <GL/glut.h>
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
void changeSize(int w, int h) {
if(h == 0) h = 1;
float ratio = 1.0 * w / h;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glViewport(0, 0, w, h);
gluPerspective(45.0f, ratio, 1.0f, 1000.0f);
glMatrixMode(GL_MODELVIEW);
}
void renderScene(void) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
gluLookAt(
0.0, 0.0, 5.0,
0.0, 0.0, 0.0,
0.0f, 1.0f, 0.0f
);
glutWireTeapot(1.0);
glutSwapBuffers();
}
void processMenuEvents(int option) {
}
void main(int argc, char **argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowPosition(
(glutGet(GLUT_SCREEN_WIDTH) - WINDOW_WIDTH) / 2,
(glutGet(GLUT_SCREEN_HEIGHT) - WINDOW_HEIGHT) / 2
);
glutInitWindowSize(WINDOW_WIDTH, WINDOW_HEIGHT);
glutCreateWindow("Camera Demo");
glutDisplayFunc(renderScene);
glutReshapeFunc(changeSize);
glutCreateMenu(processMenuEvents);
glutAddMenuEntry("OPTION 1", 1);
glutAddMenuEntry("-", -1);
glutAddMenuEntry("OPTION 2", 2);
glutAttachMenu(GLUT_RIGHT_BUTTON);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glutMainLoop();
}
我看不到 Windows 对其他项目所做的分隔符,而是将菜单项标签视为破折号。