Balls stik in a wall or just fly throw

Game Mechanics
#1

Hi,
I wrote this little Joode test but it looks litle bit strange!!!
The balls stick in the right wall ??? If I make the wall of 1f width than some balls just fly throw and other stik in . The right wall works perfekt for me!
What did I wrong ???
or didn’t I ?

I’m using the SVN source from Joode and Xith.
thx for every kind of Help!!

TestJoode.java is the Physik Class
XithVisibleJoodeTest.java Makes a 800x600 Canvas and display the balls and walls in it

http://www.clemix.de/projekte/files/wrongballs.jpg/image

#2

Looks like the plane-normal is pointing in the wrong direction?

#3

That was what im thinking too. but i did a 180° rotation to the right wall but the same Result accurs.

Now i tried it with Boxes and Capsules (dont know the right plural) and the result looks very greate!

Only the Spheres stik in the wall?. :’(
They stik also in other geoms hmm…

http://img.clemix.de/joode.JPG

#4

Also funny is if i take a Capsule with length =0 it works too ::slight_smile:

#5

so it seems there’s a problem with sphere collision detection ? it’s strange, cause it seems to me it’s the easiest to do… Well, until t_larkworthy come by again you can always use Capsules with 0 length, as you said.

#6

Well, actually, it is because this collider only tells you the depth of collision, you have to take the info and move the sphere out of the object it collided with in your collision manager.

try this:


Vector3 norm = new Vector3(cj.contact.normal);
norm.scale(cj.contact.depth);

cj.contact.g1.pos.add(norm.m[0], norm.m[1], norm.m[2]);

before the call to cj.attach(cj.contact.g1.body, cj.contact.g2.body);

#7

I have managed to replicate this bug in 2D. Smaller stepsizes, or bigger geometries is the lame work around :confused: