11-09-2018, 10:32 AM
(This post was last modified: 11-09-2018, 10:38 AM by josemendez.)
(11-09-2018, 09:25 AM)arrnav96 Wrote: That being said, originally, as you mentioned in the end, I wanted to move particles around the user's finger using SetParticleVelocities(). But I'm unable to understand how would I be able to create a finger's shape on slime's surface.
If I attenuate positions of particles around the user's finger using a slope equation, I don't understand how that would recreate a "finger shape".
A finger is basically a circular (or ellipsoidal) shape. Using a radial support function you can displace particles to the border of the circle/ellipsoid, to make it look like the user is "pressing down" on the slime.
Keep in mind that while the user is dragging, it is very unlikely he will see what's happening under his finger. Something I'd think about would be splatting a fingerprint normalmap on top of the slime, and vanish it over time (a few seconds). This would allow the user to see his "fingerprints" for a while after raising the finger off the screen.
(11-09-2018, 09:25 AM)arrnav96 Wrote: Is increasing substeps really inefficient for such use cases?
Using more substeps basically means re-doing the entire simulation more times per frame, including collision detection. So yes, if all you're looking for is relatively simple user interaction, substepping is complete overkill (specially for mobile)
(11-09-2018, 09:25 AM)arrnav96 Wrote: Also, do you have suggestions on how to make the cloth more "Slimy"? I tried altering values such as stiffness but can't quite get it right.
Looking slimy, or behaving slimy?
If the first, use a shader with high smoothness/glossiness and a normal map.
If the second, increase distance constraints slack and decrease stiffness a bit. Also consider increasing the solver's "damping" for a thicker/viscous behavior.