[Plib-users] ssg bounce?

[Simon <sim...@ho...>]

Hi, you were right about type casting.  That was a big part of getting =
ssg
to work with Builder.  Now I'm working on the theory side of things.  I =
want
to recreate this test scene I found a while ago.  It involves dice =
falling
onto some stairs and then bouncing down them, colliding with each other
also.  I've kind of merged the save and load demo with the dynamics demo =
and
I was hoping that someone could clear some things up for me.

=20

Currently I'm using a single dice with a stair model.  These are both
declared as ssgTransform's.  I then declare a couple more objects as
ssgParticles.  I link the two particle objects with a spring dampener =
and
then update the dice and stair objects using updateSMD().  Basically it
works the same as the dynamics demo except I've set it to work with a =
single
dice and not an array of 10.

=20

At the moment the dice just falls and bounces near the top of the =
stairs,
where does the spring reside?  Is it applied from the top most point of =
the
object or does it surround the whole object.  Do I even need a spring to =
get
the dice to fall down the stairs, I thought originally that I would test
face collisions and then work out bounce vectors from that.=20

=20

I've read the online ssg documentation and plowed through all the demos. =
 I
think my brain is just having trouble grasping some basic principles =
here,
can someone please give me an overview of where I should look to achieve =
my
test scene.

=20

Thanks

-simon=20