Hand model collision detection.

[Lotar]

Hi,

is it possible to detect collision between specific bone of the 5DT glove's hand model and some other objects ? When I try to apply collision mesh directly on a specific bone, it says that VizBone object has no attribute collideMesh. Is there some other way, then ?

[farshizzo]

You cannot perform collision on bones, only the entire avatar mesh. Are you trying to detect when the fingers touch something? If so, you can create an empty group node with a collision shape similar to the finger, then before performing collision detection you can manually place the group node at the current finger bone location. Either way, if you can describe what you are trying to accomplish I can provide you with some sample code.

[rubberpimple]

Hi farshizzo,

I'd love to see the code for this. I'm trying to do collision detection between a hand model and specific child nodes of a parent object. Did I read somewhere that I can only do collision detection on nodes that are children of viz.WORLD?

[Moh200jo]

Hi farshizzo,

I'd love to see the code for this. I'm trying to do collision detection between a hand model and specific child nodes of a parent object. Did I read somewhere that I can only do collision detection on nodes that are children of viz.WORLD?
Hi David,
Have you got the code of bone collision?
Thanks in advance.

[Jeff]

Here's (http://forum.worldviz.com/showthread.php?t=1635) the thread that has a response to this question

[Moh200jo]

I have tried with the following code; does not work
import viz

viz.go()

viz.add('tut_ground.wrl')
#Add the ground and an avatar.
avatar = viz.addAvatar( 'vcc_female.cfg' )
ball=viz.add('ball.wrl')
ball.setPosition(0,0.1,9)
ball.collideSphere()
ball.enable(viz.COLLIDE_NOTIFY)
walk=vizact.walkTo([0,0,8.99])
avatar.addAction(walk)
boneCollide = viz.addGroup()
boneCollide.collideBox([.5,.1,.5])
foot=avatar.getBone('Bip01 R Foot')
boneCollide.setPosition(foot.getPosition(viz.AVATA R_WORLD))
boneCollide.setQuat(foot.getQuat(viz.AVATAR_WORLD) )
nodes = viz.phys.intersectNode(boneCollide)
for n in nodes:
print 'bone collided with',n

[Jeff]

If you want to have collisions with the avatar's foot I think the code that Farshizzo posted in this (http://forum.worldviz.com/showthread.php?t=1492) thread will help. In that example a collision box is linked to an avatar's hand.