Using bone.lookat for bones other than head

[omidbrb]

Hi,

Thanks for the example code. I added 60 degrees to the roll and now it looks better. I did the same experiment with left upper arm, and I had to make a different correction to make it right.

My impression is that the lookat function makes the joint to look at a certain direction and the bone connected to the joint is not in 0 degrees relative to the joint. Am I right? Is it a way to find the exact corrections for each bone?


The code below is the modified code:

import viz
import vizact
viz.go()

viz.add('tut_ground.wrl')

#Create animating ball
ball = viz.add('white_ball.wrl')
ball.add(vizact.sequence(vizact.goto(1,1.3,2.5),vizact.goto(3,1.3,2.5),viz.FOREVER))

#Create male avatar
avatar1 = viz.add('vcc_male.cfg',pos=(-2,0,3),euler=(180,0,0))
avatar1.state(1)
head1 = avatar1.getBone('Bip01 Head')
head1.lock()

#Create female avatar
avatar2 = viz.add('vcc_female.cfg',pos=(2,0,3),euler=(180,0,0))
avatar2.state(1)
head2 = avatar2.getBone('Bip01 Head')
forearm = avatar2.getBone('Bip01 R Forearm')
arm = avatar2.getBone('Bip01 L UpperArm')

head2.lock()

def UpdateAvatarHead():
	"""Update avatars to look at ball position"""
	pos = ball.getPosition()
	
	head1.lookat(pos,0,viz.AVATAR_WORLD)
	head2.lookat(pos,0,viz.AVATAR_WORLD)
	
	forearm.lookat(pos,0,viz.AVATAR_WORLD)
	ori = forearm.getEuler(viz.AVATAR_WORLD)
	forearm.setEuler([ori[0] - 90, ori[1], ori[2]+60], viz.AVATAR_WORLD)

	arm.lookat(pos,0,viz.AVATAR_WORLD)
	ori = arm.getEuler(viz.AVATAR_WORLD)
	arm.setEuler([ori[0]+120, ori[1]+60, ori[2]+30], viz.AVATAR_WORLD)


vizact.ontimer(0,UpdateAvatarHead)

viz.MainView.move(2,0,-5)