Houdini Nodes

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Dynamic Nodes

POP Sprite

  • Built-in Houdini sprite map titled "sphere_matte.pic".

Pyro Solver

  • Preferred over the Smoke Solver since the Pyro Solver includes similar options, but with additional parameters available.


Geometry Nodes

Create Meta Import Node

Node is accessible via the Block Begin and generates detail attributes numiterations and iteration, which can assist in randomizing by each iteration.


L-System


Mountain

Adds dimension and variation to the geo.

  • Use Case: Quick way to add animated noise to geo by including time delta via $T in Time.

Subdivide

  • Use Case: Subdividing the geo allows for greater resolution so that noise, such as Anti-Aliased Flow Noise in a Point VOP, can be refined.

Trail

This has the option to compute velocity on an animated geo in lieu of generating a trail of geo.

  • Use Case: Quick way of converting the inertia from a moving geo into a v attribute.

Triangulate 2D

Takes a 2D projection of points and converts it to triangulated polygons.

  • Enabling Restore Original Point Positions allows for the output to retain the points' 3D configuration, although the node still projects onto a 2D plane.

Vellum



VOP Nodes

Anti-Aliased Noise

Bounds are defined as [-0.5,0.5]. Outputs values in the range of approximately [-0.3,0.3]. Coordinate with a Fit Range.

Anti-Aliased Flow Noise

Bounds are defined as [-0.5,0.5]. Outputs values in the range of approximately [-0.3,0.3]. Coordinate with a Fit Range.

Length

Gets the magnitude of a vector.

  • Use Case: Get speed from a velocity vector field.


Node Combos

Volume Visualizer

20190620 Hou VolVisualizer.png

The following setup can be used to visualize a volume's field/s:

  • Volume Slice
    • Set the Attribute parameter to the attribute in the volume intended to be visualized.
    • This creates a plane through the volume and expresses the data on the plane using the defined Visualization Ramp setting.
  • Volume Trail
    • Disable the Detect Range option and adjust the Maximum parameter to hone in on the min/max range to the specific data in the volume.