i used AppForkLiftDemo code sample to make a big world with a car ;in first time it's work perfectly and no problem.
but if i change groundShape box size from 50 to 5000 like this code :
btCollisionShape* groundShape = new btBoxShape(btVector3(5000,3,5000)); // i need to make a big ground so i set value's from btVector3(50,3,50) to btVector3(5000,3,5000)
when run application i see the car vehicle drop on the ground but not move when i press up key ! Please Try it your self ! (open AppForkLiftDemo sample and just change ground shape size from (50,3,50) to (5000,3,5000) ) !!
i need to make terrain with btBoxShape no want to use triangles mesh to collision.
how to solve this problem ????Thank you for help.