如何移动与另一个b2body相连的我的一个b2body

Question

i am very new to cocos2d ,i have started working with rope physics.i am using vrope class for creating ropes.i have implemented one rope attached with one polygon shaped b2body ,now i have fixed one end of my rope on top of the screen and one end with my polygon shaped dynamic b2body , it looks like it's hanging in air.now what i want is by applying some force on my b2body(dynamic body) , i want it falling down from top to bottom means i want to move my this body1 which is attached with rope towards ground along with that rope , i am trying like this :applying force on my b2body :

in my update() method :

   body1->ApplyForce(b2Vec2(0.0 , 9.8 * body1->GetMass()*100 ), body1->GetWorldCenter());

but ,somehow this not working .

i searched a lot on this but still i don't find anything which can help me for this . it would be appreciated if any kind of help.

Answer 1

If you want to make the body fall along with the rope. Then before you apply some force to that body1, instead of attaching a static body at other end, attach the body with very small dynamic body. In this way the body1 will fall down along with the rope