In this video, Scott Pagano explains how to use a POP Collison Detect node to create collision between your particles and your ground geometry. Learn techniques for creating simple and efficient interactions between particles and geometry in Houdini.
- [Voiceover] Alright, so the next node we're gonna add is a…pop collision detect.…So we'll do a pop collision detect.…Alrighty, so we're gonna open that up,…and then we are going to go to the SOP Path area,…and now let's scroll to the top here,…and we're gonna go to the ground object,…and you see we have a out particle collision object,…which is the one we want.…So we're gonna say 'yes',…and now we are gonna change the default particle size to .1,…cause this is sort of internally how large it thinks…that particle is,…and the default value is too small.…
Turn off 'deforming geometry',…cause we don't need it to re-evaluate every frame,…because the geometry isn't deforming.…And now I'll go under 'behavior' and change the response…from 'none' to 'slide'.…So now let's rewind this,…and let's play it back.…And now you can see instead of getting our particles,…like falling through,…as they were before,…now we're colliding with this geometry of our…little volcano here.…
And by default you can see this node also colors the hits,…
Author
Scott Pagano
Released
6/5/2017- Working with sprites
- Adding POP Color and POP Wind
- Creating a particle source object
- Creating volume noise
- Creating trails
- POP Collision Detect
- Instance node
Skill Level Advanced
Duration
Views
-
Introduction
-
Welcome1m 26s
-
Exercise files47s
-
Intro to particles2m 23s
-
-
1. Sprites
-
Display options2m 16s
-
Scene overview2m 32s
-
Create particle sim4m 8s
-
Modify POP Source node2m 38s
-
Add POP Color and POP Wind4m 20s
-
Add POP Sprite3m 44s
-
Create pscale4m 31s
-
Create alpha3m 15s
-
Create color2m 41s
-
Final prep3m 55s
-
Shader overview2m 35s
-
-
2. Trails
-
Scene overview2m 7s
-
Create particle sim1m 48s
-
Modify POP Source node1m 47s
-
Create volume noise3m 45s
-
Add POP Advect by Volumes3m 41s
-
Add POP Color51s
-
Create trails 16m 42s
-
Create trails 24m 53s
-
Create color and alpha 14m 18s
-
Create color and alpha 23m 42s
-
Create pscale2m 32s
-
Final prep2m 27s
-
Shader overview2m 52s
-
-
3. Impacts
-
Scene overview3m 16s
-
Create particle sim3m 30s
-
POP Source nodes3m 29s
-
POP Collision Detect3m 19s
-
POP Drag, Wind, and Color2m 16s
-
POP Kill2m 45s
-
Cache particles3m 20s
-
Create Cd and alpha 14m 25s
-
Create Cd and alpha 24m 46s
-
Final prep2m 32s
-
Final render2m 20s
-
-
4. Instances
-
Scene overview1m 1s
-
Create particle sim1m 17s
-
POP Source nodes1m 51s
-
POP Wind: Down2m 8s
-
POP Wind: Noise1m 36s
-
POP Drag: Random1m 40s
-
POP Drag: Age1m 33s
-
POP Drag: Spin1m 41s
-
POP Collision Detect1m 40s
-
POP Kill1m 44s
-
Cache particles2m 13s
-
Process v 14m 57s
-
Rotate N and up by v5m 1s
-
Process v 22m 22s
-
Create pscale3m 22s
-
Create instance3m 2s
-
Create Cd4m 50s
-
Material SOP4m 30s
-
Instance node3m 18s
-
Final render2m 20s
-
-
Conclusion
-
Next steps1m 11s
-
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.
Share this video
Embed this video
Video: POP Collision Detect