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I multiply the mouse movement by a given number to get camera rotation of a desired speed. But it only works at 60 FPS. When I don't limit the frame rate I get around 350 FPS and the camera rotation is significantly too slow.

In my calculation, I already consider the frame time.

rotateCamera(ivec2 deltaMouse, float deltaTime, float sensitivity)
{
    // apply multipliers
    deltaMouse *= deltaTime;
    deltaMouse *= sensitivity;

    // rotate camera by deltaMouse
    // ...
}

Is this approach wrong? Why isn't the mouse movement independent from the frame rate in my code? How to achieve that?

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1 Answer 1

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Where's deltaMouse coming from? If the API you're using is giving you translation units like pixels or centimeters, you shouldn't scale by deltaTime. Moving your mouse 1 cm should rotate the camera by, say, 15 degrees, regardless of how many frames or how long it took to move that 1 cm.

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  • \$\begingroup\$ I do not use a high level API. However, your answer is correct. The rotation shouldn't depend on the time at all. \$\endgroup\$
    – danijar
    May 12, 2013 at 11:27

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