cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   hvilela
   Member

   Hello guys,

   I would like to have two objects working as one. To achieve that, I tried to create a prismatic joint with the same value for lower and upper translation.
   It work fine till the moment that strong forces are applied on the objects. One moves just a little bit in relation to the other, but as I said, I would like then working as one.

   b2PrismaticJointDef jointDef;
   b2Vec2 worldAxis(1.0f, 0.0f);
   jointDef.Initialize(body1, body2, body1->GetWorldCenter(), worldAxis);
   jointDef.lowerTranslation = 0.0f;
   jointDef.upperTranslation = 0.0f;
   jointDef.enableLimit = true;
   world->CreateJoint(&jointDef);

   Anybody can help me?

   Posted 1 year ago #
2. 

   hvilela
   Member

   Noboby has the same problem? Just add some joints in a chain and it'll happen.

   Posted 1 year ago #
3. 

   xcrunner509
   Member

   Why dont you just use a distance joint?

   Posted 1 year ago #
4. 

   Questor
   Member

   hvilela,

   A couple of choices:

   1) If you always want the two objects to be connected and move together then create multiple fixtures for the one body might be the way to go.
   2) If you need to break apart the objects eventually, you could use a weld joint instead.

   As xcrunner509 mentioned, you could use a distance joint, but you would probably have to use several as one would still allow for pivoting, etc. From what I can gather from your message a weld joint would probably be the best way to go, but I am pretty sure the objects would have to overlap at the weld joint location.

   Hope this helps,
   Q

   Posted 1 year ago #

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