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View Full Version : Node Based Stretch Limbs, Need some assist


BoomRat
08-13-2005, 10:30 PM
OK, I'm trying to work out a node based stretch limb system that has an Off/On option.

Here's what I've got so far for an arm:

Joints:

shoulder --> elbow --> wrist
shoulder_IK --> elbow_IK --> wrist_IK
shoulder_FK --> elbow_FK --> wrist_FK


Additional tools:

arm_ctrl with Use IK attribute and Stretch Off/On attribute

armDist: Distance tool with locators parented to shoulder and arm_ctrl


Nodes: (--> denotes connection)

armDist.distance --> armDistMultiplyDivide.input1X with .input2X set to 12 (12 is the non-stretched length of the arm)

armDistMultiplyDivide.outputX --> armDistClamp.inputR (minR is 1, maxR is 3)

armDistClamp.outputR --> shoulder_IK.scaleX
armDistClamp.outputR --> elbow_IK.scaleX

This works, believe me.


So I have a blend node setup that control the rotation and scaleX of the shoulder and elbow and can swap between the FK joints and the IK joints. What I would like is to have an off/on setup that would allow me to turn off the stretch. I've tried a condition node but didn't get to far with it. Any body got an idea?

Morganism
08-14-2005, 03:05 AM
well, without really digging into how you have your stretch setup, you can usually turn stuff on and off with a multDoubleLinear node somewhere that's hooked up to a 0 to 1 attribute. Whatever other attribute you run through there will be multiplied by 0 or 1, effectively turning it on or off.

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08-14-2005, 03:05 AM
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