weird rigging request.. scissors

[Da_elf]

Ok this is weird one but i want scissors to walk on the tips of their blades. im used to normal legs. not straight things light this in a kinda hobble im the one usually figuring out some rigging stuff here but this one has me baffled. my brain must not be working today

[Da_elf]

DOH! never mind. figured it out. so simple

[Da_elf]

doh. never mind again. that didnt work out as i thought it would grrrrrr

[lukx]

here you go:sc.zip

will this work for you?

[Da_elf]

im on 2009. the file doesnt open

[lukx]

sorry from 2011 the lowest I can save is 2010

1. Create a point helper - add an 'Attribute Holder' modifier
2. Open the Parameters Editor dialogue (Animation -> Parameter Editor) and add a new spinner with range 0 to 90
3. Right click one half of your scissors and wire its appropriate rotation channel to the spinner value on the point helper.
4. In the Parameter Wiring box set the direction to go from the spinner value to the scissor rotation value. In the expression box under the scissor side, add "degtorad" (without the quotes) before the name of the spinner. Click connect.
5. Repeat steps 3 and 4 for the other half of the scissors only this time add a "-" before the degtorad in the expression box.
6. Select the point helper and change the value on the spinner, the scissor halves should rotate in opposite directions.

[Da_elf]

but that doesnt make them walk? thats only good for making them open and close

[joconnell]

if you're talking about the walk on the tips of the scissors, make a bone from one tip to the other with an end bone. Make an ik solver from the bone to the end bone. Parent your scissors to the long bone object, then animate the main bone and the ik solver to make it walk along.

http://joconnell.com/forums/scissors-Desktop.mov

[MoonDoggie]

That animation made me laugh. It's really cute looking.

[joconnell]

It's a bit like the walk you do when someone rings your house phone when you were on the loo.

[Da_elf]

how do i do it so my IK goal doesnt move away from the end bone? most i co do is align it back after i get the pose i need
my problem is when i move the main bone the end bone slides out of possition

[rivoli]

http://joconnell.com/forums/scissors-Desktop.mov

this is brilliant, I really wasn't expecting a walk like that.. but it works perfectly

[joconnell]

Kind of depends really, you either cheat and do it manually, make some sort of stretchy system that'll make the main bone follow the length of the ik and constrain one blade to the tip bone, or do some sort of script controller that'll limit the range of movement of the ik solver to a radius of the bone. Really you should have switchable pivots for this type of thing but that's reeeeealy complicated to do

[Da_elf]

ah ha!. no need to cheat. figured it out. Started with what you had but then went on my own tangent and turned out perfectly. once again here is another ELF tutorial with some help from joconnell. enjoy all

http://www.elfpro3d.com/Misc/rigged_scissors.avi
(xvid codec)

[joconnell]

Good and sneaky - like it