jakerupert Posted July 1, 2009 Share Posted July 1, 2009 I would like to constrain a wheels bone to rotate on the x-axis like the roll of the rollhandle of the bone of a steering wheel, but am lost on how to set this up. ( see attached picture ) Any hints anybody? Quote Link to comment Share on other sites More sharing options...
Paul Forwood Posted July 1, 2009 Share Posted July 1, 2009 Probably the simplest way to do it is to use a pose: 1) Create a new pose for your vehicles steering that runs from -100 to +100. 2) At +100 turn your wheels to maximum right turn 3) At -100 turn your wheels to maximum left turn 4) In your choreography or Action use the steering pose to control the position of the vehicle's wheels. Alternatively you could have a small bone at the pivot point of the front wheels which orients-like the steering wheel and make the existing wheel bones children of these small "steering bones". Quote Link to comment Share on other sites More sharing options...
jakerupert Posted July 1, 2009 Author Share Posted July 1, 2009 Thanks a lot Paul, both methods worked like a charm. I enclose pictures of the second solution with the steering bones rolling like the steeringwheel bone, which has the advantage, that the steeringaction is actually steeringwheel driven like in real live. Next I want to add the turning of the tyres. Maybe you could help me on this as well. Is there a possibility that the turning speed of the tyres adopts automatically to the speed of the car? SteeringA.bmp SteeringB.bmp Quote Link to comment Share on other sites More sharing options...
Paul Forwood Posted July 1, 2009 Share Posted July 1, 2009 If you will be constraining the wheels to a path you can use " Has Stride Length" otherwise it is a case of using expressions or just winging it. I am far too inexperienced with expressions to be able to give you any guidance though. Quote Link to comment Share on other sites More sharing options...
R Reynolds Posted July 1, 2009 Share Posted July 1, 2009 You might find this useful as well. Vehicle Bones Quote Link to comment Share on other sites More sharing options...
jakerupert Posted July 4, 2009 Author Share Posted July 4, 2009 So now I implemented a constrained steering, which is working allright in the pose. Next I added some wheelturn , quaternion rotate, two turns (720`degree ) on 40 frames. -Does the wheelturn look o.k.? (It seems to be, but I am kind of unsure looking at my realtime wireframe represantation) -Can I change the speed of the wheelturn somehow, without being constrained to a path and without an expression? Next I added some steering action with my poseslider. I can see the keyframes, but the steering is simply not moving. -Any hints, what can cause this? I enclose the prj for investigation carrawtest.mov carrawtest.zip Quote Link to comment Share on other sites More sharing options...
mtpeak2 Posted July 4, 2009 Share Posted July 4, 2009 Your project is asking for a chor file. The action only consists of the tire rotation, no steering. Quote Link to comment Share on other sites More sharing options...
3DArtZ Posted July 4, 2009 Share Posted July 4, 2009 without thinking too much about this yet, Im thinking I would have 2 bones or 1 bone 1 null for each wheele. Say, the null is the parent. It turns with the steering wheele, if you are using expressions to drive this behaviour. And the bone would handle the wheele spinning. that way you can keep the rotations and math seperate. Mike Fitz www.3dartz.com Quote Link to comment Share on other sites More sharing options...
jakerupert Posted July 5, 2009 Author Share Posted July 5, 2009 -Seems I have found the culprit. The chorrange somehow is misteriously set to 4442 , so that the animation in the steering only would show up very, very late. I dont know , what causes this, each time I correct the setting to 80 and restart AM the chorrange is set back to 4442 again. Any ideas anybody? ( Also , can I lock it somehow, that I go accidentally to minus keyframes? ) The zoom to fit doesn`t really seem to do the expected for me in that window..... Quote Link to comment Share on other sites More sharing options...
jakerupert Posted July 5, 2009 Author Share Posted July 5, 2009 Managed to get it to work, though the setting of the chorrange doesn`t get saved, even when I saved it under different names. Maybe I am overlooking something really simple here. Added two pathes and let the car jump from one to the other. carrawtestB1.mov Quote Link to comment Share on other sites More sharing options...
mtpeak2 Posted July 5, 2009 Share Posted July 5, 2009 Check the chor range in every action and chor action of every model. Quote Link to comment Share on other sites More sharing options...
jakerupert Posted July 6, 2009 Author Share Posted July 6, 2009 Thanks a lot It was also changed in the path and camera chor actions properties. Again I would have been lost without this excellent forum and your help. I also noticed that you can lock the chor range there, so that you cant change that anymore unvoluntarily. A similar lock for the timeline, that you cant go to minus keys would be great... Quote Link to comment Share on other sites More sharing options...
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