Constraints in bullet

[eskimo456]

Hi there sorry if this is in the wrong part of the forum.

I am trying to allow two seperate components to be able to snap together and connect using a slider.

I have several objects that fall with gravity and are able to collide and react to each other. I cant work out how to get them to join together using a slider. I have not been able to find much information on the subject.

I am setting up a joint using

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sliderTest = new btSliderConstraint(*classTest.rigidBody2,*classTest.rigidBody3,classTest.transformation2,classTest.transformation3,true);

I have to rigidbodies and two seperate transformations, the objects are currently next to each other.

I then add the constraint to the world using

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initilisePhysics.dynamicsWorld->addConstraint(sliderTest,true);

If I load the program all the objects dont render as there x,y,z position is infinitly small. If I remove the line then everything will fall and collide correctly. Do the rigid bodies require some additional parameters? Or do I need to set up some additional parameters for it to work?

Many thanks