simulating forces

Read articles in the "Math and Physics" section of GameDev.

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Don''t listen to me. I''ve had too much coffee.

There should be three different types of vectors in your engine. Position vectors (an objects position relative to the origin), velocity vectors (the speed and direction of an object), and acceleration vectors (the rate at which the speed is changing). The acceleration vectors will update the velocity vectors, and the velocity vectors will update the position vectors. So, if you want your guy to fall, he will be at a certain position. The only force is gravity if he is standing still, which is applied as an acceleration vector (0,-9.8,0) in m/s or (0,-32.2,0) in ft/s, to the velocity of the guy. So he will accelerate downward and his downward velocity will increase, thereby changing his position downward more and more over time. To apply acceleration to velocity, just add the two vectors together and you get a new velocity. To apply velocity to position do the same. Of course, now you will need to add you own timing and collision detection routines, so read up! Later.

Maybe i didnt mention i use opengl, and i am wondering if applying grvity could be done by use of gltranslate function
so i move player down by a factor in vector?It is not quite clear but could i use a loop which just iterates gltranslate function in negative -y and send down to the pipeline to render it so it just appears as if he moves down on the screen.This is faking and simple and i am wondering if this is the way to do it?Thanks!!How do you do it?

Ripper