i am working on a car racing game and want to know what script should i use to calculate acceleration of the players car.

In im script im using an if/else statement:

if (my.car_speed < (my.max_speed * time))
{
my.car_speed += 1 * time; // increase the speed of the car
}
else //
{
my.car_speed -= 0.5 * time; // decrease the speed of the car
}

i have Max_speed defined as skill23 and car_speed defined as skill27. but i keep getting a syntrex error. can anyone help or give me a better script to use.

thanks alot

-Marc

If I understand you correctly, you want to calculate the acceleration rate rather than speed or the force that pushes the car..

A tip, in a function,
set temp to the current speed of the car...
Then, in the next frame, set whatever variable you use as "acceleration speed" like this.

accell = (current_speed - temp) * time_step;


The goal is to compare how many units the mph/kph has increase in each from relative from the previous frame.

If frame 1 you're going 50 mph and in the next from you're going 55, you've accelerated at a rate of 5 mph per frame (which is actualy pretty fast!).

Another thing is you have to multiply the result by time_step or any difference in the framerate will render the results inaccurate.

It might be something like this.
////////////////////////////////////////////
var speedmph;
var accell_rate;

(c-script style example)
function calc_accell_speed()
{
while(1)
{
temp = speedmph; //OR YOUR speed variable
wait(1);
accell_rate = (speedmph - temp) * time_step;
//// acceleration is mph in current frame MINUS mph in the previous from - compensated by timestep.


}
}
///////////////////////////////////////////