OpenGL 中的画中画导致闪烁
我正在尝试为显示汽车的图形程序设置画中画样式“地图”显示。 (仅在较小的视口中再次显示顶部视图。)但是,第二个视口似乎闪烁。我认为我这样做是正确的,但我可能没有正确地理解这一点。
void display(void) {
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
// Set Perspective
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(fov, aspect, near, far);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glViewport(0, 0, 500, 500);
// Lighting follows Camera if inserted here.
//Set Camera
calculateCamera();
gluLookAt(eyeX + carPosX, eyeY + carPosY, eyeZ + carPosZ, cX + carPosX,
cY + carPosY, cZ + carPosZ, 0, 1, 0);
displayEnvironment();
glClear(GL_DEPTH_BUFFER_BIT);
// Set Perspective
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(fov, aspect, near, far);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glViewport(0,0,150,150);
gluLookAt(0, 140, 0,0, 0, 0, 1, 0, 0);
displayEnvironment();
}
I am trying to set up a Picture in picture style "map" display for a graphics program that displays a car. (Just shows the view from top again in a smaller view port.) However, the second viewport seems to flicker. I thought I was doing this correctly, but I may be not conceptualizing this correctly.
void display(void) {
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
// Set Perspective
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(fov, aspect, near, far);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glViewport(0, 0, 500, 500);
// Lighting follows Camera if inserted here.
//Set Camera
calculateCamera();
gluLookAt(eyeX + carPosX, eyeY + carPosY, eyeZ + carPosZ, cX + carPosX,
cY + carPosY, cZ + carPosZ, 0, 1, 0);
displayEnvironment();
glClear(GL_DEPTH_BUFFER_BIT);
// Set Perspective
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(fov, aspect, near, far);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glViewport(0,0,150,150);
gluLookAt(0, 140, 0,0, 0, 0, 1, 0, 0);
displayEnvironment();
}
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你在哪里/什么时候交换缓冲区?也许您没有等待渲染完成?
Where/when are you swapping buffers? Maybe you're not waiting for the render to finish?