Real-Time Physics Simulation Forum

Hello everyone, I create a btPairCachingGhostObject object as sensor and a btRigidBody object. Then, I control the rigid body to move along X-axis (move 0.005m each time) until colliding with sensor. A illogical issue has been found: When the rigid body passes through the sensor from left to right, ...

Hello everyone, I have a strange problem: Why the thin "btBoxShapeBox" box cannot to be laid flat on the "btConvexHullShape" plane? The "btConvexHullShape" plane: btConvexHullShape* hull = new btConvexHullShape(); const btVector3 v1 = btVector3(0, 0.1, -2); hull->addPoi...

Don't set the margin of the convex hull to 0.0. Leave it at the default (which is 0.04m I think) and see if that makes your problem go away. My hypothesis is: you are allowing the box to actually penetrate the convex hull and the penetration resolution logic is kicking in. The penetration resolutio...

Hello everyone, I'm trying to create a curve conveyor which is used for convey the box. I adopt btConvexHullShape class to make the collision shape of conveyor suface. but it has one problem: the Box will shake when it drop onto the suface. It needs to be emphasized that the bottom of the box and th...

This example's description as follows: https://i.loli.net/2020/05/08/W14osT3JOU8kKvu.jpg Press W for wireframe. Press D to toggle auto-deactivation of the simulation. I try to press "W" to show wireframe. I found it works that the box can move normally. When the box stopped, I try to press...

Hello, I'm try to use contact callback and special friction mode, with a target velocity and direction to simulate a conveyor. Like this topic about " How to simulate a conveyor? ": https://pybullet.org/Bullet/phpBB3/viewtopic.php?f=9&t=6076 The following is my conveyor (Static RigidBo...

Hello everyone, I'm new to Bullet, I'm trying to move a box in kinematics. As far as I know, when in kinematics, I should move the box by the following method: btRigidBody->getMotionState()->setWorldTransform(const btTransform& worldTrans); instead of: btRigidBody->setLinearVelocity(const btVect...