Can a shape have it's own gravity.

[nickhomme]

Is it possible for have an object/shape to have its own gravity. It would basically be like a planet where when things float by the planet it would start to draw them closer depending on the distance between the object and the planet.

[slembcke]

Not trivially, but you can calculate your own forces each frame or use integration callbacks to calculate gravity on the fly. Check out the Planet demo that comes with Chipmunk.

[jason_rogers]

this might be a silly idea but if you want a simple physical pull towards your planet you could use a dampend spring constraint between your planet and your object and remove the constraint if the object gets to far.

not the cleanest solution for a game that depends on the gravity on the long run but maybe less tedious than calculating gravity on the flight ^^

[slembcke]

While that would sort of work, it wouldn't produce a very gravity like force. Gravity gets weaker the farther away you get, springs get stronger.