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implemented rolling friction, using a contact constraint. Useful to get rolling spheres to rest, even on a slightly sloped plane.

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See http://www.youtube.com/watch?v=RV7sBAsKu4M and Bullet/Demos/RollingFrictionDemo
Fixes in FractureDemo (mouse picking constraint needs to be removed, otherwise constraint solver crashes/asserts)
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erwin.coumans
2012-09-15 06:52:17 +00:00
parent 54744b6ab9
commit 7eebb79ced
14 changed files with 263 additions and 44 deletions
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2
src/BulletCollision/NarrowPhaseCollision/btManifoldPoint.h
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@@ -64,6 +64,7 @@ class btManifoldPoint
m_normalWorldOnB( normal ),
m_distance1( distance ),
m_combinedFriction(btScalar(0.)),
m_combinedRollingFriction(btScalar(0.)),
m_combinedRestitution(btScalar(0.)),
m_userPersistentData(0),
m_lateralFrictionInitialized(false),
@@ -90,6 +91,7 @@ class btManifoldPoint
btScalar m_distance1;
btScalar m_combinedFriction;
btScalar m_combinedRollingFriction;
btScalar m_combinedRestitution;
//BP mod, store contact triangles.