Trouble with truck tires
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I am having problems with a truck I created, the tires seem to go half way through the floor, I tried adjusting the gravity values and the floor is set to static mesh, and I can't seem to find the problem. This only seems to affect the front tires (the ones that steer). I downloaded a couple of examples from the 3D warehouse and they don't seem to have this problem. I'm thinking it might have something to do with uneven weight distribution, but I'm not sure. By the way it's an 18 wheeler, with a trailer attached. Any help on this matter would be appreciated. Thanks.
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@rayl said:
I am having problems with a truck I created, the tires seem to go half way through the floor, I tried adjusting the gravity values and the floor is set to static mesh, and I can't seem to find the problem. This only seems to affect the front tires (the ones that steer). I downloaded a couple of examples from the 3D warehouse and they don't seem to have this problem. I'm thinking it might have something to do with uneven weight distribution, but I'm not sure. By the way it's an 18 wheeler, with a trailer attached. Any help on this matter would be appreciated. Thanks.
Sounds like the tires are either the wrong shape or maybe they have flipped/scaled elements.
-Try setting the shape of the tires to "sphere" or "convexhull". If that doesn't work explode and regroup the tire.If you post the model I can tell you exactly.
Chris
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I tried to upload the file but it surpasses the file size, so I tried removing part by part trying to lower the size to 512kb, and when I reached the limit allowed it just happens to be that the problem goes away. I'm going to assume it has to do with the amount of weight applied to the front end.
If that's the problem, is there any way to add additional accessories or additions without adding weight to the main frame?
I included a file with 3 pictures showing the problem. Thanks again.
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@rayl said:
I tried to upload the file but it surpasses the file size, so I tried removing part by part trying to lower the size to 512kb, and when I reached the limit allowed it just happens to be that the problem goes away. I'm going to assume it has to do with the amount of weight applied to the front end.
If that's the problem, is there any way to add additional accessories or additions without adding weight to the main frame?
I included a file with 3 pictures showing the problem. Thanks again.
Looking a the pictures it might be a weight issue. You could set some of the objects in the group to ignore. That way they don't weight anything. But they wont collide either.
Try this: the big box in the back of the cab. Mark it ignore and then rebuild the shape of it as a hollow box. 5 or six thin boxes, one for the front,back,top and each side. That should make it weigh a lot less.
You might also want to make sure that everything is shaped the way you expect. Select all, right click, select Debug->readback collision geometry. Then press play. You should see what the physics engine believes is the shape of everything. Are there any surprises?
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Thank you, that solved the problem. Most of the parts were components, so I did as you said and exploded all of them and made them one single group, then set it to ignore. I'll just keep the bumper as a solid and maybe add some invisible walls on the sides and rear to add some collision.
About readback collision geometry, how would you fix that if I ever came across such a problem? With the first model that I had that problem when I turned readback collision geometry on and noticed the wiremesh was not consistent with the actual tire model, it seemed to be floating a bit higher than the tire itself. Would it be a matter of just exploding and re-grouping the model in question?
Thanks once more for the time you've taken to help and for developing such a great program for Sketch Up users. I am enjoying it very much.
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@rayl said:
About readback collision geometry, how would you fix that if I ever came across such a problem? With the first model that I had that problem when I turned readback collision geometry on and noticed the wiremesh was not consistent with the actual tire model, it seemed to be floating a bit higher than the tire itself. Would it be a matter of just exploding and re-grouping the model in question?
Yes, That is the easiest way to fix that problem.
@rayl said:
Thanks once more for the time you've taken to help and for developing such a great program for Sketch Up users. I am enjoying it very much.
Your welcome.
Chris
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