Ok,
In the previous mail, i tried to solve the bad
skinning problem. :-)
For the bad position problem here is the point
:
I assume that you move the creature skeleton with a
code like:
Skeleton->setPos
(LastSnapedOnTheGroundPosition);
It works with the GNU because it is not skinned to
a skeleton and the GNU local origine is 1 meter under the object. So the GNU
floats perfectly.
In the case of a skeleton, setPos() sets the world
position of the root bone. (here, it is "Bip01"). The root bone is snap
on the landscape and your creature is half into the ground. It is the animation
that will give the delta Z position above the ground.
In Ryzom, we make the following
things:
- Evaluate the next world position of the
creature
- Snap it on the ground
- Evaluate the current animation time (ie where the
animation must by played)
- Get the matrix of the root bone from the current
animation (evalute the "pos" and the "rotquat" tracks and build a
matrix)
- Translate the matrix with your snaped world
position (if need be, rotate it)
- Set the final skeleton world matrix.
(Skeleton->setMatrix (finalRootBoneWorldMatrix))
If you have animated your creature with its feet
snaped on z=0, the "pos" track should return a decent Z value (>0, in fact
the same than in 3dsmax).
I hope this helps.
Hld.
----- Original Message -----
Sent: Thursday, February 19, 2004 4:34
PM
Subject: Re: [Nel] animation
problem
ok if the shape and skeleton are in the same
position
no matter where that is they appear half
underground
and (facing forwards in max ) appear facing left
in game
even tho GNU is facing right way and happily
floating above the
ground
----- Original Message -----
Sent: Thursday, February 19, 2004 3:06
PM
Subject: Re: [Nel] animation
problem
moving the shape without the physique modifier
then pasting the physique modifier back on
worked
i am about 0.0001" off but it doesnt notice
visually
which i can cope with
strange tho if i clicked VIEW SCENE in 3ds max
it
animated fine its only when i export that the
shapes
position comes into play.
wouldnt it be a good idea to have a node
option
that took its worldspace position instead of
object space?
----- Original Message -----
Sent: Thursday, February 19, 2004
2:47 PM
Subject: Re: [Nel] animation
problem
hi cyril :)
if i disable the physique modifier he drops
back to 0,0,0
so that maybe the issue...
ill try moving him and let you know how it
goes :)
incidentally do you know how to resize an
object in 3ds
i cant seem to do more than rescale its world
space interpretation
----- Original Message -----
Sent: Thursday, February 19, 2004
10:23 AM
Subject: Re: [Nel] animation
problem
Oops, forget the previous
message..
Hi Andi,
> after loading into our game i notice
that after adding the skeleton our monster is half under the
floor
> and facing the wrong
way...
This is a classic issue, in max, when you create your biped, it
looks at the -Y axis to face the front view.
> same issue his tail went crazy and im
sure he enjoyed it but was pretty unbecomming even for a horny little
monster
Can you check this points before we go further:
The skin shape vertices are exported in world
space (it's a special case). At run time, vertices are moved back in
bone local space using the inverted "figure mode" bone world matrix and
then transformed in word space using the "current" bone world matrix. It
means that :
- whatever you may
change on your skeleton (position, posture, orientation, size) you have
to reexport the skin model.
- you have to be sure
that your skin shape, with physique modifier disabled, matchs the
skeleton in figure mode.
- the skin shape and the
skeleton have to be exported in figure mode.
I hope your monster will get back on form
:-)
Hld.
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