[Noob][Ruby] Discrepency between shape and drawing

[gdurelle]

Hello,

I'm discovering Chipmunk under Ruby, using it with Gosu.

And have a little problem in here : http://github.com/gdurelle/RPong where I try to create a very simple pong game to learn Chipmunk.

The Paddles drawn are not actually the shape they got, meaning the ball bouce on it but on the extremities it has a strange behaviour.
Above the top of it, it bounces when should continue.
In its bottom part, it go through it when it should bounce.

I described the problem here : http://github.com/gdurelle/RPong/issues/1

Any idea ?

[slembcke]

Are you making the paddle as a static shape by chance? If you move a static shape, the collision detection data won't be automatically updated unless you call one of the cpSpaceReindex shape functions.

[gdurelle]

Not sure to known what it means in fact...
I tried to add

Code: Select all

@space.rehash_static()

in my update method, but it did not change anything...

My Paddle is moving when I press arrow keys.
I add it to the space through :

Code: Select all

@space.add_body(left_body)
@space.add_shape(left_shape)

I currently not fully understand the differences between Shape and Body so, and the good Vector use with them, so please be patient

I documented myself with existing code for the gosu tutorial move to chipmunk and this : http://beoran.github.com/chipmunk/#BB rdoc.

I must have missed some things...

[gdurelle]

anyone ?