In this video, Scott Pagano explains how to create trail lines from the particles emitted from your source geometry. Learn techniques for creating flowing trail lines from any moving object in Houdini.
- [Instructor] Alright so…now we've cached out our particles,…I'm gonna open up the parameters,…make sure load from disc is on,…go down to the group delete here and let's playback our sim.…And cool we've got this…really pretty languid particle system…that is emitting from the leading edges of our trails here,…our little bird.…So what we're gonna do is we're gonna start…making this into actual lines…and then refining those lines…to be the way we want them to be.…So first off we're gonna make an add…and this is gonna be the object…that turns these points into lines.…
Because we have our PNT attribute…that if we remember was created on the initial source points…and then basically got propagated…to every particle that emitted from those points.…So we can use every particle…that has that same variable value…and we can connect all those together.…So if I go to my geometry spreadsheet, let's highlight this,…you see under PNT if I sort by that…I have a number of points that all share zero…and then a number of points…that all share all these different numbers.…
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
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Introduction
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Welcome1m 26s
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Exercise files47s
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Intro to particles2m 23s
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1. Sprites
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Display options2m 16s
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Scene overview2m 32s
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Create particle sim4m 8s
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Modify POP Source node2m 38s
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Add POP Color and POP Wind4m 20s
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Add POP Sprite3m 44s
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Create pscale4m 31s
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Create alpha3m 15s
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Create color2m 41s
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Final prep3m 55s
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Shader overview2m 35s
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2. Trails
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Scene overview2m 7s
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Create particle sim1m 48s
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Modify POP Source node1m 47s
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Create volume noise3m 45s
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Add POP Advect by Volumes3m 41s
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Add POP Color51s
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Create trails 16m 42s
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Create trails 24m 53s
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Create color and alpha 14m 18s
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Create color and alpha 23m 42s
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Create pscale2m 32s
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Final prep2m 27s
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Shader overview2m 52s
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3. Impacts
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Scene overview3m 16s
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Create particle sim3m 30s
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POP Source nodes3m 29s
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POP Collision Detect3m 19s
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POP Drag, Wind, and Color2m 16s
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POP Kill2m 45s
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Cache particles3m 20s
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Create Cd and alpha 14m 25s
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Create Cd and alpha 24m 46s
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Final prep2m 32s
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Final render2m 20s
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4. Instances
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Scene overview1m 1s
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Create particle sim1m 17s
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POP Source nodes1m 51s
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POP Wind: Down2m 8s
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POP Wind: Noise1m 36s
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POP Drag: Random1m 40s
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POP Drag: Age1m 33s
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POP Drag: Spin1m 41s
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POP Collision Detect1m 40s
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POP Kill1m 44s
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Cache particles2m 13s
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Process v 14m 57s
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Rotate N and up by v5m 1s
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Process v 22m 22s
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Create pscale3m 22s
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Create instance3m 2s
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Create Cd4m 50s
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Material SOP4m 30s
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Instance node3m 18s
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Final render2m 20s
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Conclusion
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Next steps1m 11s
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Video: Create trails 1