New to library and having some trouble

[the pizza boy]

I have a small circle that falls. I want it to hit a static shape below it, but it falls right through the static shape. Here's the relevant parts of my code:

Code: Select all

    cpInitChipmunk();
    
    cpSpace* World = cpSpaceNew();
    World->gravity = cpv(0,-1);
    
    cpBody* body;
    cpShape* shape;
    cpBody* staticbody = cpBodyNew(INFINITY, INFINITY);

    body = cpBodyNew(0.1,0);
    body->p = cpv(50,-50);
    shape = cpCircleShapeNew(body, 8, cpvzero);
    cpSpaceAddBody(World, body);
    cpSpaceAddShape(World, shape);
    
    shape = cpCircleShapeNew(staticbody, 32, cpv(50,-100));
    cpSpaceAddStaticShape(World, shape);

I am just using a static circle to quickly test it.

[slembcke]

Just a guess, but you are setting the moment of inertia to 0. That's going to cause all sorts of weird behavior.

If you don't want the object to rotate, set it to infinity. Otherwise use cpMomentForCircle(). If you really understand what the moment of inertia is for you can calculate and set it yourself, but guessing a number always leads to frustration.

[the pizza boy]

Thanks, that worked fine. This library is great!