Collision Problem on Vehicle Model-Skeleton Importing From Maya

[anonymous_user_0df12f74]

@;171624

Thank you for your answer, but we have already tried to get root collision to be realistic like, down-z position starts from car’s body, neither zero position nor wheel positions. I’m afraid its not the solution. The weird thing is that, Unreal only detects body(root) collision which means that box you mentioned. It does not recognize wheel collision “if we link wheels to the anim blueprint system”, otherwise collisions works perfectly, but as you can guess, vehicle does not move.

Yes that is normal, the wheel collision is not used, but you can’t have the main body box collision down that far, it just won’t work. What’s happening when you can’t move the vehicle is the body’s box collision is hitting the ground before the wheels do, not allowing the wheels to move. Here is my working vehicle setup (image 1), if I try and make the box come down to the ground like in the image above, the vehicle won’t move either.

Also in your video when you have a wheel collision cylinder selected, and the Z-axis is pointing in the direction that the Y-axis should be, with the Y-axis pointing downwards. Can you check the rotation of the wheel bones in maya (if you are using bones)? It looks like they are rotated by 90 degrees, try selecting a bone and switch over to rotation mode and check the values to ensure they are all 0.0,0.0,0.0 as has caused problems for others in the past. You can see the difference in the 2 images below, looking at the XYZ axis gizmo, it is pointing in the wrong direction. could also be caused by exporting an FBX with the “Y-Axis Up”, check in the fbx export options when you export from maya and ensure you have it set to “Z-Axis Up”.

Hope that helps

EDIT: I am also a 3dsMax user, don’t really know much when it comes to maya unfortunately so there could be something I am missing, but looking over what had said on Answerhub there must be something going on with X-Form as mentioned, either rotations are off or X_form transformations are causing an, sorry I am not sure how can be fixed in maya, hopefully a maya expert will be able to help here as well.