i'm working on vehicle physics in OpenGL, and all seems well, except for one problem. the glTranslatef(); function dosn't seem to be working. at all. either that, or theres somthing wrong with the physics code itself which is very, very possible.

vehicle.cpp (most of it. dosn't show includes and variable declarations):

Code:

void vphys::setup(float engine, float mass, float pos[2], float sdir[2])
{
vd.epower = engine;
vd.m = mass;
//vd.p[2] = pos[2];
vd.dir[2] = sdir[2];
}
void vphys::mainroutine()
{
//traction
vd.tractionF[0] = vd.dir[0]*vd.epower;
vd.tractionF[1] = vd.dir[1]*vd.epower;
//drag
vd.speed = sqrt(vd.v[0]*vd.v[0]+vd.v[1]*vd.v[1]);
vd.dragF[0] = -dragC*vd.v[0]*vd.speed;
vd.dragF[1] = -dragC*vd.v[1]*vd.speed;
//roll resistance
vd.rrF[0] = -rrC*vd.v[0];
vd.rrF[1] = -rrC*vd.v[1];
//total longtitudinal force
float longF[2];
longF[0] = vd.tractionF[0]+vd.dragF[0]+vd.rrF[0];
longF[1] = vd.tractionF[1]+vd.dragF[1]+vd.rrF[1];
//acceleration
vd.a[0] = longF[0]/vd.m;
vd.a[1] = longF[1]/vd.m;
//velocity
vd.v[0] = vd.v[0]+dt*vd.a[0];
vd.v[1] = vd.v[1]+dt*vd.a[1];
//final position
vd.p[0] = vd.p[0]+dt*vd.v[0];
vd.p[1] = vd.p[1]+dt*vd.v[1];
glTranslatef(0, 0, vd.p[1]);
}

from my render(); function:

Code:

glScalef(0.01, 0.01, 0.01);
_peVphys->setup(900, 1000, startposition, startdirection);
_peVphys->mainroutine();
pModel->draw();

I really have no idea whats wrong. Although I havn't coded in 3.5 weeks, so i'm a little rusty. (more than I was to begin with :P).

-psychopath