LYNX | Houdini | Force General Asset

LYNX | Houdini | Force General Asset

LYNX tool numero tre 😉

If you’re coming from a simulation software other than Houdini you’ve probably struggled a bit when first playing around with forces in dops. There are a lot of nodes (pop wind, pop force, gravity, wind, uniform force,…) that seem to do the same thing with slight differences. On top of that some of them go after the solver, some into the pre/post-solve inputs and some only work with points, others with volumes. Simply masking a force to a certain area is quite the hassle of adding multiple nodes and controlling the mask transform/shape is usually not done in the dop context.

To solve this issue I’m now presenting:

LYNX_force_general

The goal was to eliminate the above described problems and to still have enough user control for customization. You simply plug it into the solvers of your choice! It can work on geometry and volumes (aka dop “fields”) simultaneously. Masking is enabled by the press of a button with support for various shapes (even custom geometry). You can also override any paramter or the final force strength via vex or even choose to write to custom dop data. For advanced cases you can also share the masking vdb fields
the asset generates internally across multiple “LYNX_force_general” instances to reduce memory usage. So to put it simply: Instead of a lot of force nodes for different purposes, you now have one.

Features include:

  • Simple to use interface with handles in the 3d viewport
  • Presets to “hit the ground running”
  • Easily slide the shape along any curve or pin it to a deforming polygon
  • Masking the force by shapes with fine tunable falloff settings
  • Guides to visualize force strength/direction/masks
  • Vex overrides with support for an additional input/custom bindings(attributes & groups)
  • Full Houdini native documentation

Download the tool and the example files on Github!


Release log

v1.0 Release:

  • New gradient force let’s your sim flow along the gradient of your geometry.
  • Pin the transform to any polygon geometry or slide it along a curve.
  • Full Houdini native documentation with useful tips & tricks.
  • Noise now supports all noise types, curl noise sdf influence and “noise as strength”.
  • Full support for curves with helpful visualizers.
  • “Hide on Playback” support for guides
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v0.9 Release:

  • Simple to use interface with handles in the 3d viewport
  • Presets to “hit the ground running”
  • Masking the force by shapes with fine tunable falloff settings
  • Guides to visualize force strength/direction/masks
  • Vex overrides with support for an additional input/custom bindings(attributes & groups)
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Tutorials

Here is a complete tutorial covering the basics and advanced topics:

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Special thanks to Patrick Zeller & Philipp Engelhardt (Website) for beta-testing and giving valuable feedback for improving the tool 🙂

 

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