# [SOLVED]Need help with making a joint

Gurrier

18-05-2010 17:31:16

I really need some help here, totally in the dark. It more a python know how problem.

This is the code for making a distanceJoint with PhysX:

```NxDistanceJointDesc distDesc; distDesc.actor[0] = actor0; distDesc.actor[1] = actor1; distDesc.localAnchor[0]=NxVec(0.0f,1.0f,0.0f); //point which is constrained on actor0 distDesc.localAnchor[1]=NxVec(1.0f,0.0f,0.0f); //point which is constrained in actor1 distDesc.maxDistance=10.0f; distDesc.minDistance=10.0f; distDesc.flags=NX_DJF_MIN_DISTANCE_ENABLED | NX_DJF_MAX_DISTANCE_ENABLED; //Enforce a fixed distance. NxDistanceJoint* distJoint=(NxDistanceJoint *)gScene->createJoint(distDesc); ```

This is what I made from it:
``` ##Make the joint distDesc = physx.NxDistanceJointDesc ##set up actors actors = actor0, actor1 distDesc.actor = actors ##setup the correct local anchor points anchors = anchor0, anchor1 distDesc.localAnchor = anchors ##setup the max and min distance distDesc.maxDistance = maxDist distDesc.minDistance = minDist distDesc.flags = physx.NX_DJF_MIN_DISTANCE_ENABLED | physx.NX_DJF_MAX_DISTANCE_ENABLED distJoint = self.gScene.createJoint(distDesc)```

Everything fills in oke but on the line "distJoint = self.gScene.createJoint(distDesc)" I get this error:
``` distJoint = self.gScene.createJoint(distDesc) Boost.Python.ArgumentError: Python argument types in NxScene.createJoint(NxScene, Boost.Python.class) did not match C++ signature: createJoint(struct NxScene_wrapper {lvalue}, class NxJointDesc) createJoint(class NxScene {lvalue}, class NxJointDesc jointDesc)```

If I then try to change:
``` distDesc = physx.NxDistanceJointDesc to distDesc = physx.NxDistanceJointDesc() ##note the () I get an error at distDesc.actor = actors AttributeError: can't set attribute ```

Some help would greatly be apreciated!

``` ##Make the joint distDesc = physx.NxDistanceJointDesc() ##set up actors actors = actor0, actor1 distDesc.actor[0] = actor0 distDesc.actor[1] = actor1 ##setup the correct local anchor points anchors = anchor0, anchor1 distDesc.localAnchor[0] = anchor0 distDesc.localAnchor[1] = anchor1 ##setup the max and min distance distDesc.maxDistance = maxDist distDesc.minDistance = minDist distDesc.flags = physx.NX_DJF_MIN_DISTANCE_ENABLED | physx.NX_DJF_MAX_DISTANCE_ENABLED if canCollide: distDesc.flags |= physx.NX_JF_COLLISION_ENABLED if visualize: distDesc.flags |= physx.NX_JF_VISUALIZATION distJoint = self.gScene.createJoint(distDesc)```