fix btCapsuleShape (X,Y,Z) margin issue fix uninitialized variables in TinyRenderer: m_hasLightDistance, m_hasLightAmbientCoeff, m_hasLightDiffuseCoeff, m_hasLightSpecularCoeff pybullet/shared memory API 'getClosestPoints' / b3InitClosestDistanceQuery, only report contacts equal/smaller distance than given