void RaycastCar::updateVehicle( btScalar step )
{
m_currentVehicleSpeedKmHour = btScalar(3.6f) * getRigidBody()->getLinearVelocity().length();
const btTransform & chassisTrans = getChassisWorldTransform();
btVector3 forwardW(chassisTrans.getBasis()[0][m_indexForwardAxis],
chassisTrans.getBasis()[1][m_indexForwardAxis],
chassisTrans.getBasis()[2][m_indexForwardAxis]);
if (forwardW.dot(getRigidBody()->getLinearVelocity()) < btScalar(0.0f))
m_currentVehicleSpeedKmHour *= btScalar(-1.0f);
for (int i = 0; i < getNumWheels(); i++)
{
updateWheelTransform(i, false);
btScalar depth;
depth = rayCast(m_wheelInfo[i]);
}
update_suspension(step);
update_engine(step);
update_forces(step);
apply_impulses(step);
}
int main(int argc, char *argv[])
{
int time;
char method[SCREEN_UPDATE_STR_LEN];
char fps_text[16];
if (argc > 1) {
if (strstr(argv[1], "help")) {
printf("Type \"kwestkingdom\" to play!\n");
exit(0);
}
}
if (!init_kwestkingdom()) {
return 1;
}
init_engine();
/**
* Reset the timers just before the game begins.
*/
reset_timer();
/**
* BEGIN MAIN LOOP
*/
while (!quitting) {
while (get_ticks() == 0) {
rest(1);
}
while (get_ticks() > 0) {
time = get_ticks();
/**
* UPDATE
*/
update_engine();
decrease_timer();
if (time <= get_ticks()) {
break;
}
}
/**
* DRAW
*/
paint_engine(grab_canvas());
/**
* Show FPS
*/
sprintf(fps_text, "FPS %d", get_fps());
show_text(grab_canvas(), fps_text, 10, 10, WHITE, BLACK);
/**
* Show the method of screen updating.
*/
find_screen_update_method(method);
show_text(
grab_canvas(),
method,
grab_tile_size() / 5, /* x */
grab_canvas_height() - (grab_tile_size() / 2), /* y */
WHITE,
BLACK
);
/**
* Show all of the new screen changes
*/
refresh_screen();
mark_frame_complete();
}
/**
* END MAIN LOOP
*/
/**
* Cleanup
*/
stop_engine();
stop_screen();
stop_resources();
check_memory();
return 0;
}
