iphone - Chipmunk for Cocos2D, Collision Detection - Best Practice? -

i'm using chipmunk physics , want collision detection find out when 2 cpbodies collide. i've got questions;

• could give me example of using cpcollpairfunc or cpspaceaddcollisionhandler ?
• i've seen around rectangle intersection; possible polygons?
• should use library (spacemanager or whatever) on top?

thank you!

f.

you need add following lines

shape->collision_type = kcollisiontypeparticle;
cpspaceaddcollisionhandler(space_, kcollisiontypeparticle, kcollisiontypeparticle, collisondetect, null, null, null, self);

kcollisiontypeparticle enum can define if there 2 types of different particles.

typedef enum {
     kcollisiontypeparticle,
     kcollisiontypeparticlenew
} collisiontype;

here collisondetect method need register as:

cpbool collisondetect(cparbiter *arb, struct cpspace *space, void *data) {
      *layer = ( *)data;
     [layer collisondetect:arb];
     return cptrue;
}

now here here handle rest of code

-(void)collisondetect:(cparbiter*)arb {

     nslog(@"collision detected");

}