pin position to parented rotating object

[Steve Sierra]

Hi Alex,

I’m not sure I’m understanding your case completely, but I think you should try only parenting the higher nulls (those that are on the thighs) and then parenting the lower nulls to the upper nulls.

Does that help ?
😉

[Alexander Weil]

Sorry, i tried my best to give you a overview of my case but im no native speaker :-/

when i change my parenting, my complete rig wont work

[Steve Sierra]

Hi,

How about if you don’t parent the upper nulls, but add an expression to their positions and rotations linking them to the thighs ?

I’m supposing you want the upper nulls to rotate and stay in place while the lower nulls follow the upper legs ?

Don’t worry about the language, I’m no native reader either ????

Cheers

[Alexander Weil]

the rig works without the nulls, i just added them to get some data for my Corner Pin effect to close the gap between the Thighs so it looks like a dress. but i dont get any X,Y-Data for the Corner Pin because the Thights rotate and the nulls that are parented to the Thighs get the date somehow from the changing rotation

[Steve Sierra]

are you using shape layers ? solids with masks ? image files ?

I think you will have to use pythagorus to translate the thigh rotation to the corner pin’s positions.

[Alexander Weil]

I use Shape Layers.

Can you tell me how to use pythagorus in this case?

thisComp.layer("Dress Null 2").toComp(anchorPoint)

i tried these expression, it somehow creates data, but no usable data. my Corner Pin Position is somewhere outside my Comp Screen (around 2250, 785).

[Steve Sierra]

I think I got it thanks to your expression (no need for old greeks) :

– create a shape rectangle that is your comp size in your shape layer.
– apply the corner pin effect to the shape layer
– Parent Dress Null 2 to Dress Null 1 which is parented to your rotating leg layer.
– Now add your expression to the corner pins and you should be good to go.

Does that work for you ?

Cheers !

[Alexander Weil]

the “Medium Red” on the left is the Shape Layer with Corner Pin
the dots on the right is the result of a Solid with Corner Pin

here is the file maybe this will show you better: ☺
11299_charstest.aep.zip

[Steve Sierra]

Hi Alex,

Sorry, I couldn’t read your project… I’m on PC and still using CS6. Could you save it in a compatible mode ?

I forgot to tell you I had created a ThighsCtrl Null (pelvis) located between the two thighs and parented the legs and the shape layer to it.
I also placed the dress nulls on the “outside” of each leg (left side for the left leg, and right side for the right leg).
I’ll join my project and a few screenshots so you can see.

Cheers !
project : https://f1.creativecow.net/11305/dress-project?uploaded=file

[Alexander Weil]

well, thats exactly what i did … i think
tried to downgrade it to cs6, only came from cc2017 to cc2014 ☹