https://forums.autodesk.com/t5/maya-forum/bullet-rigid-set-overlapping-faces/m-p/8676849#M27874 <P>Answer for question 1 *(actually it was in the online doc <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P> <P>&nbsp;</P> <UL id="GUID-98B6B598-7D95-4E47-88A3-D44DF43C2624__UL_190D10BE0C7B4D0086CB53FEBE6D82A2" class="ul"> <LI id="GUID-98B6B598-7D95-4E47-88A3-D44DF43C2624__LI_B28C0A580A72463BB3E7D3EBC7C3E247" class="li">If your objects are touching or intersecting, set the<SPAN>&nbsp;</SPAN><A class="xref" title="Defines the size of the gap between Rigid objects for them to collide. The Collision Shape Margin acts like a buffer around each collision shape. Turning Collision Shape Margin on speeds the simulation up, as well as makes it more stable. Notes on Collision Shape Margin Behavior: The default setting for the Collision Shape Margin is 0.040, (equal to 4 centimeters), and any objects that touch will react the moment the solve is activated. If you use the Glue Shapes option, and your glued objects touch or intersect, set the Collision Shape Margin slider to 0.00 so you do not create an instant collision. Setting the Collision Shape Marginto 0.00 reduces the margin to nothing and the solver is aware that the pieces will automatically collide. By default, Bullet uses a small collision margin for collision shapes to improve the performance and reliability of the collision detection. We recommend that you do not modify the default Collision Shape Margin of 0.040, as if you use a positive value, the zero margin might introduce problems. Depending on which collision shapes you use, the collision margin has a different meaning. Generally, the Collision Shape Margin expands the object, creating a small gap. To compensate for this gap creation, some shapes subtract the margin from the object's actual size. For example, the Bullet Box collision shape subtracts the collision margin from the half extents, where the Sphere collision shape uses its entire radius as the collision margin so that no gap occurs. (There is no need to override the Collision Shape Margin for spheres and it is not recommended.) For convex hulls, cylinders and cones, the margin is added to the extents of the object, so a gap occurs unless you adjust the graphics mesh or collision size." href="http://help.autodesk.com/view/MAYAUL/2018/ENU/?guid=GUID-87E77F42-187C-405A-B8AE-F2E3B96BFDFF#GUID-87E77F42-187C-405A-B8AE-F2E3B96BFDFF__GUID-B9367B7A-D7B3-427C-8481-34566B8C63E3" data-url="http://help.autodesk.com/cloudhelp/2018/ENU/Maya-SimulationEffects/files/GUID-87E77F42-187C-405A-B8AE-F2E3B96BFDFF.htm#GUID-87E77F42-187C-405A-B8AE-F2E3B96BFDFF__GUID-B9367B7A-D7B3-427C-8481-34566B8C63E3" target="_blank">Collision Shape Margin</A><SPAN>&nbsp;</SPAN>slider to 0 so they do not automatically collide at the start of the solve.</LI> </UL> Fri, 22 Mar 2019 12:26:04 GMT moiamy 2019-03-22T12:26:04Z https://forums.autodesk.com/t5/maya-forum/bullet-rigid-set-overlapping-faces/m-p/8676819#M27873 <P>Hello guys</P> <P>&nbsp;</P> <P>2 questions :</P> <P>&nbsp;</P> <P>1. Is there a way to setup the threshold for a Bullet Rigid Set, so that it won't collide internally in case of 2 overlapping faces ? (I have no result with the glue parameter or by fixing the collision shape type to whatever options)</P> <P>&nbsp;</P> <P>2. Besides I don't understant why at the end of the animation,&nbsp; the face pointed toward Y is not affected by the gravity. Any idea ?</P> <P>&nbsp;</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="bullet02.jpg" style="width: 400px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/617105i9135F53289490AE1/image-size/medium?v=v2&amp;px=400" role="button" title="bullet02.jpg" alt="bullet02.jpg" /></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="bullet03.jpg" style="width: 400px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/617106i639EEC26F1131504/image-size/medium?v=v2&amp;px=400" role="button" title="bullet03.jpg" alt="bullet03.jpg" /></span></P> <P>&nbsp;</P> Fri, 22 Mar 2019 12:13:29 GMT https://forums.autodesk.com/t5/maya-forum/bullet-rigid-set-overlapping-faces/m-p/8676819#M27873 moiamy 2019-03-22T12:13:29Z https://forums.autodesk.com/t5/maya-forum/bullet-rigid-set-overlapping-faces/m-p/8676849#M27874 <P>Answer for question 1 *(actually it was in the online doc <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P> <P>&nbsp;</P> <UL id="GUID-98B6B598-7D95-4E47-88A3-D44DF43C2624__UL_190D10BE0C7B4D0086CB53FEBE6D82A2" class="ul"> <LI id="GUID-98B6B598-7D95-4E47-88A3-D44DF43C2624__LI_B28C0A580A72463BB3E7D3EBC7C3E247" class="li">If your objects are touching or intersecting, set the<SPAN>&nbsp;</SPAN><A class="xref" title="Defines the size of the gap between Rigid objects for them to collide. The Collision Shape Margin acts like a buffer around each collision shape. Turning Collision Shape Margin on speeds the simulation up, as well as makes it more stable. Notes on Collision Shape Margin Behavior: The default setting for the Collision Shape Margin is 0.040, (equal to 4 centimeters), and any objects that touch will react the moment the solve is activated. If you use the Glue Shapes option, and your glued objects touch or intersect, set the Collision Shape Margin slider to 0.00 so you do not create an instant collision. Setting the Collision Shape Marginto 0.00 reduces the margin to nothing and the solver is aware that the pieces will automatically collide. By default, Bullet uses a small collision margin for collision shapes to improve the performance and reliability of the collision detection. We recommend that you do not modify the default Collision Shape Margin of 0.040, as if you use a positive value, the zero margin might introduce problems. Depending on which collision shapes you use, the collision margin has a different meaning. Generally, the Collision Shape Margin expands the object, creating a small gap. To compensate for this gap creation, some shapes subtract the margin from the object's actual size. For example, the Bullet Box collision shape subtracts the collision margin from the half extents, where the Sphere collision shape uses its entire radius as the collision margin so that no gap occurs. (There is no need to override the Collision Shape Margin for spheres and it is not recommended.) For convex hulls, cylinders and cones, the margin is added to the extents of the object, so a gap occurs unless you adjust the graphics mesh or collision size." href="http://help.autodesk.com/view/MAYAUL/2018/ENU/?guid=GUID-87E77F42-187C-405A-B8AE-F2E3B96BFDFF#GUID-87E77F42-187C-405A-B8AE-F2E3B96BFDFF__GUID-B9367B7A-D7B3-427C-8481-34566B8C63E3" data-url="http://help.autodesk.com/cloudhelp/2018/ENU/Maya-SimulationEffects/files/GUID-87E77F42-187C-405A-B8AE-F2E3B96BFDFF.htm#GUID-87E77F42-187C-405A-B8AE-F2E3B96BFDFF__GUID-B9367B7A-D7B3-427C-8481-34566B8C63E3" target="_blank">Collision Shape Margin</A><SPAN>&nbsp;</SPAN>slider to 0 so they do not automatically collide at the start of the solve.</LI> </UL> Fri, 22 Mar 2019 12:26:04 GMT https://forums.autodesk.com/t5/maya-forum/bullet-rigid-set-overlapping-faces/m-p/8676849#M27874 moiamy 2019-03-22T12:26:04Z