Difference between revisions of "Live 2022.08.21"
From kunz
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[[File:2022_08_21_v007.gif | 900px]] | [[File:2022_08_21_v007.gif | 900px]] | ||
== Scene File == | |||
Get the Houdini scene here: [[:File:2022_08_21_data_disk_sim_007.hiplc|data_disk_sim_007.hiplc]] | |||
== Summary == | |||
Simple setup where a particle simulation is driven by pyro velocity field. The geometry in the particle simulation is continuously resampled using a sop solver to maintain evenly spaced line segments and prevent some spiking artifacts. | |||
I use some simple VEX code to only allow velocities in the vel field in areas above a certain threshold. This helps keep some parts of the line structure rigid and intact while other areas above the threshold are free to move. | |||
<syntaxhighlight lang='C'> | |||
v@vel *= length(@vel)>.005; | |||
</syntaxhighlight> | |||
After the simulation, the curves get their normal by sampling the velocity field from the pyro sim. This gives you a consistent (non-flickering) orientation of the curves when you render them. | |||
[[File:Screenshot_at_2022-09-06_09-30-43.png | 900px]] | [[File:Screenshot_at_2022-09-06_09-30-43.png | 900px]] | ||
<youtube>anHA2hPmXik</ | |||
== Video On Demand == | |||
<embedvideo service="youtube" dimensions="900x500" urlargs="modestbranding=1&showinfo=0">https://www.youtube.com/watch?v=anHA2hPmXik</embedvideo> | |||
* 00:00 Scene Setup | |||
* 03:30 Particle Sim Setup | |||
* 11:50 Pyro Smoke Sim Setup | |||
* 21:00 Bringing Vel Field into Particle Sim | |||
* 40:00 Tweaking Simulation Parameters | |||
* 1:52:00 Redshift Lighting Setup | |||
* 2:15:00 Redshift PostFX | |||
* 2:17:51 Rendering a Quick Preview Animation | |||
* 2:29:00 Wrapping Up | |||
== Additional Scene Files == | |||
[[:File:2022_08_21_data_disk_sim_001.hiplc|data_disk_sim_001.hiplc]] | |||
[[:File:2022_08_21_data_disk_sim_002.hiplc|data_disk_sim_002.hiplc]] | |||
[[:File:2022_08_21_data_disk_sim_003.hiplc|data_disk_sim_003.hiplc]] | |||
== Additional Images == | |||
[[File:2022_08_21_v007.jpg | 900px]] | |||
[[File:2022_08_21_v010.jpg | 900px]] | |||
[[File:2022_08_21_v008.jpg | 900px]] | |||
Latest revision as of 20:18, 14 September 2022
Advecting Lines via Pyro
Scene File
Get the Houdini scene here: data_disk_sim_007.hiplc
Summary
Simple setup where a particle simulation is driven by pyro velocity field. The geometry in the particle simulation is continuously resampled using a sop solver to maintain evenly spaced line segments and prevent some spiking artifacts.
I use some simple VEX code to only allow velocities in the vel field in areas above a certain threshold. This helps keep some parts of the line structure rigid and intact while other areas above the threshold are free to move.
v@vel *= length(@vel)>.005;
After the simulation, the curves get their normal by sampling the velocity field from the pyro sim. This gives you a consistent (non-flickering) orientation of the curves when you render them.
Video On Demand
- 00:00 Scene Setup
- 03:30 Particle Sim Setup
- 11:50 Pyro Smoke Sim Setup
- 21:00 Bringing Vel Field into Particle Sim
- 40:00 Tweaking Simulation Parameters
- 1:52:00 Redshift Lighting Setup
- 2:15:00 Redshift PostFX
- 2:17:51 Rendering a Quick Preview Animation
- 2:29:00 Wrapping Up
Additional Scene Files
Additional Images
