I'm trying to use Newton for my car physics, but I'm having two big problems.

When I run the level I get a "crash in NewtonVehicleAddTyre" error before the level starts for each of the four tires.

Then when the level starts the tires stay in place and the body of the car falls through the floor. I'm using a model for the track the car drives on and I don't know if that has anything to do with it. Also, I've seen a lot of posts about the .cls file, but I don't know how to create it or where to find it.

Can anyone help?

Well, I found some code that gave me the .cls file (I'd tried the code in the Newton manual and it hadn't worked), but I still have the same problems, plus one.

Now I'm getting this error, which I'm guessing is related to the tire problem:
"Empty pointer in NewtonGetParentEntity: vehicleConst=temp_ent.myVehicleConstraint"

yes , thats because ur not setting up the car and tires properly . Once each tite and the car have their actions added , u need to group them together as follows , group all 4 tires togeter into 1 group , then click finish group. then select the tire group and group it with thr car.That should fix ur problem.

btw , if the model falls through the floor it's cuz ur using a model fot the track , if it was geometry the car would fall to the floor while the tires stayed in place but it wouldnt fall through it.

I'm having the same problems with the "crash in NewtonVehicleAddTyre". I did what you said but I still have problems. All I did was change cars in the car level. Is there some kind of bug? Or did we do somrthing wrong.

i've tried a couple of cars and all work fine , though I have had the NewtonVehicleAddTyre crash before too , usually it ends up the car and tires not being groupped up properly , or a tire not having it's action set , or that i didnt recompile the level , so try those things , check that every tire has the tire action , that the car model has it's proper action , that they're groupped correctly , and compile the level , close gamestudio , reopen it , and run the level , should work . For some reason sometimes if you dont restart gamestudio after recompiling after the tyre error u'll keep on getting it untill u restart the proggie.

Sorry, no luck. Would you like to test the car I'm using?

im having the same problem when i get through the errors i have wheels but no car body please help

I've posted the solution to the "crash in NewtonVehicleAddTyre" error in another thread.

You cannot use level blocks for the sky!
You have to use a model as a sky.
Not sure if using a map entity would work...
but it's worth a try.