Houdini Stuff

to summarise - convert to vdb, do a volume point sample. multiply the normal of the geo by the volume sample and then add back to the origin...

 Say you've made some nice particles and you give them density/burn/temperature and then convert these to VDB fields. You might find the...

float dist = xyzdist(1,@P); float distremap = fit(dist,ch("near"),ch("far"),0,1); f@density *= distremap; This gi...

Bring in your VDB however you need to. Plug it into a VolumeVOP and create an addpoint node. Plug P into the ptvalue input. Next create a...

Create a VDB with desired turbulence/noise in whichever way you fancy. Make sure the vdb is called "vel". Keeps things neater.. ...

This can be done with a point wrangle, but for those that prefer VOPs... create a point VOP, connect the geometry you wish to test into th...

The deforming object shelf button serves most collision purposes, even for static objects (turn off use deforming objects) but sometimes it ...

It's possible to make a piece of geometry, pump it through a PointVOP and give it some velocity, using constants, curl noise or whatever...

Enable Sticky in the Flip Solver. Create sticky attributes using point wrangle (f@stick=1;) and paint (replace Cd with stick). VDB from po...

Group points, turn off numeric, enable bounding points & change bounding type to points only. Blast away particles before VDB evaluatio...

particles, run a pointVop taking length of velocity and fit ranging them (min max to 0 and 1) Plug new values into pscale. VDB from parti...