iphone - Chipmunk Physics: cpSpaceShapeQuery -


how cpspaceshapequery function work? can not find doc it.

andrea

yeah... never got around documenting that... sorry. create body , shape (neither needs added space) , use query other query functions.

this code snippet makes copy of body , shape on stack , simulates out it's first predicted collision point drawing path goes.

    cpbody body = *(originalbody);   cppolyshape shape = *((cppolyshape *)originalshape); shape.shape.body = &body;  cpfloat dt = 1.0f/60.0f; cpvect gravity = space->gravity;  int count = 0; for(int i=0; i<300; i++){     cpbodyupdateposition(&body, dt);     cpbodyupdatevelocity(&body, gravity, 1.0f, dt);      if(cpspaceshapequery(space, (cpshape *)&shape, null, null)){         quads[count%maxquads] = quad(body.p, body.rot, cgrectmake(0, 2*32, 64, 64), tsize);         count++;          break;     }      if(i%10==0){         quads[count%maxquads] = quad(body.p, body.rot, rect, tsize);         count++;     } }

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