trying to get a npr rig of a "doughnut" and "biscotti" working im using a cloth sim to simulate "doughnut jiggle" and im struggling to get the "biscotti" to penetrate through the donut hole and then have the hole return to its regular shape,also trying to simulate "coffee liquid and bubbles" to spill out of the donut hole,since its npr so it dosent have to be realistic and the less intense it is on my pc the better
Just like getting a real biscotti through a real dounut, friction is your enemy. Set it to 0. Animate that parameter if you need it in other parts of the simulation, but you probably wont. Heres the real deal though. You will spend the rest of your life fine tuning the parameters of the dynamics and never get it right. You want save yourself work as opposed to animating the thing with bones and blendshapes. I would strongly siggest a hybrib approach. Make a static doughnut you animaye by hand. Broad strokes animations. That mesh drives a dynamic mesh which is trying to copy the static mesh which is also sensitive to momentum and collisions. Ive been researching biscotti doughnut rigs for awhile and what i keep coming back to is that the solution is blend shapes and bones.
>>1024300(OP) This tutorial is of course a classic, referenced to do the thing on the left: https://www.youtube.com/watch?v=bLps8bgIeJ4
the general idea is the shrinkwrap on the eight guide bones will keep the donut hole wrapped around the biscotti, but only if the biscotti is between them and the hole is smaller, apart from that it just follows whatever motion you animate
adding bones helped a ton do any of you know how to get shapekeys to activate the closer bone the further away bone A pushes bone B?(limit distance bone constraint)
Thought of this thread after making this >>>/h/8813050
>>1024439 One way is to make a bone stretching to bone B then use a driver based on (stretching bone's length -1)/expected max length, on the shape key's weight
>>1024982 my bad man i forgot i set it up so that each bone streches the donut in a different direction when the biscotti gets to close and added a cloth modifier to give the donut "donut physics" its too jiggly and dosent maintain its shape as well as it should but i have a good feel on what to tweak to get where i want to
heres the progress and the modifiers and simply wrap pro settings i used to get the effect,still trying to figure out how to make "coffee" splash out of the hole or have bubbles come out of it thats where im at