Assert with Joints

[liuqiangNetease]

assert(island->getNbJoints() > 0);

when one Scene has three bodys: a HingeJoint(connect two righidbody) and a righidbody without HingeJoint.

[DanielChappuis]

Hello,

Thanks for reporting this. Can you please let me know in which file you have this assert ?
Do you have a full stack trace with the assert ?

[liuqiangNetease]

solvePositionConstraints(reactphysics3d::Island*)
DynamicsWorld::solvePositionCorrection()
DynamicsWorld::update(float)

[liuqiangNetease]

hello,
the bug is 100% appear, when scene has three bodies. a HingeJoint(connect two righidbody) and a righidbody without HingeJoint.

[DanielChappuis]

Can you post here the code you use to create the bodies, the joints and to add them into the world ?

[liuqiangNetease]

ok, add codes below( test begin, end) in JointsScene::JointsScene(). constructor function.

// Create the dynamics world for the physics simulation
mPhysicsWorld = new rp3d::DynamicsWorld(gravity, worldSettings);

      //test crash by lq begin
      Box* cube = new Box(BOX_SIZE, BOX_MASS, getDynamicsWorld(), mMeshFolderPath);

      // Change the material properties of the rigid body
      rp3d::Material& material = cube->getRigidBody()->getMaterial();
      material.setBounciness(rp3d::decimal(0.4));
      //end

// Create the Ball-and-Socket joint
createBallAndSocketJoints();

[DanielChappuis]

I have pushed the fix63 branch with a fix for this issue. Can you please test this branch on your side and let me know if it is fixed on your side ?

[liuqiangNetease]

thank u, it works.

[DanielChappuis]

I have merged the fix into the "master" branch. Thanks a lot for reporting this issue.