game speed?

Based on your description, it sounds like you aren''t using time-based motion. In order to make things appear to move at a consistent rate on computers of varying speed, you''ll need a timing mechanism that can calculate what fraction of a second has elapsed since the last frame, then multiply this by the velocity/acceleration/torque/whatever per second to get the delta.

As an example, 2D linear motion:

float timeStep;
...
float velX = 20.0f; // desired speed of object in units/second
float velY = 25.0f;
...
object.X += (velX * timeStep);
object.Y += (velY * timeStep);

where timeStep is a variable you set each frame, according to your timer, that represents the part of a second this frame has taken (e.g. 20 milliseconds is 0.02 seconds; if each frame consistently takes 0.02 seconds, your framerate will be 50 FPS).

In short, you store your velocity as "units per real unit of time" instead of "units applied instantaneously per game tick", leading to something like

velocity = distance/time;
velocity * delta_time = delta_distance;

Later,
ZE.



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