CODEWITHSUNDEEP
c++openglrenderingfullscreenantialiasing
BlackBox
BlackBox

Reputation: 2233

OpenGL fullscreen rendering

I'm currently coding a game in openGL and I've got to a stage where I'm in first person mode controlling the "camera" with W & S, and rotating with the mouse.

For some reason, when I'm in windowed mode, the speeds at which I move and rotate seems MUCH faster than the speeds I get when In fullscreen, but that's not my main issue. (*1)

As a result of the above, I decided to restrict the game to fullscreen.

My level is a cube where each side is a different RGB colour and when I move my mouse very quickly, the corners of the level turn very blocky until I slow down. (*2)

Anyone got any idea what's going on for either the questions (*1, *2).

I tried to screenshot it for you guys, but it looks normal in the screenshot.

Upvotes: 2

Views: 777

Answers (1)

genpfault
genpfault

Reputation: 52082

Measure your frame times with glutGet(GLUT_ELAPSED_TIME):

void displayCallback()
{
    int start = glutGet(GLUT_ELAPSED_TIME);
    drawFrame();
    glutSwapBuffers();
    int end = glutGet(GLUT_ELAPSED_TIME);
    cout << "Frame time: " << (end-start) << "ms" << endl;
}

If they're around 16-17ms you most likely have some vsync. Managing vsync is system-dependent, both in access method and reliability :(

Your best bet is frame-rate independence, so you do the Right Thing no matter how fast/slow you're running.

Upvotes: 2

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