Houdini 13.0 Nodes

interface version 1

Creates a proxy version of each primitive group by wrapping a low resolution proxy around them (PrimGroup family SOP).

Useful for (and designed to) replace higher-resolution geometry fractures in RBD simulations, if the results doesn’t have to be too accurate (e.g. lots of fast-moving debris).

By default all per-primitive and per-point attributes are transferred to the proxies and the appropriate geometry groups are recreated.

The resulting groups can be used in DOP networks and their results can be imported back with the usual DOP Import SOP node.

(TODO: create an example scene and make sure prim groups are in proper order, etc. – in other words, do a test round.)

Parameters

Mode

Mode for detecting each geometry fracture (by primitive groups or name attribute).

Group Mask

Geometry groups matching this mask will be replaced with proxies.

Attrib Name

Name of the attribute used to determine the geometry pieces.

Tolerance

A tolerance value name attribute values (in case it contains numerical values, e.g. fracture indices). Values that differ less than the tolerance are considered equal.

Proxy Geometry

Settings for generation of an initial proxy shape.

Proxy Type

Base geometry type for the low-res proxy.

Sphere

Sphere-based (use the frequency parameter to set resolution).

Box

Box-based (use the divisions parameters to set resolution).

Custom

Custom geometry (2nd input)

Post-Fit Scale

The proxy geometry is first fitted around the bounding box of the current primitive group. Then an uniform scale is performed, using this value.

Wrapping

Wrapping the initial shape around the original geometry.

Do Wrapping

Wrap the proxy around the original shape.

Scale

Blend between plain bounding box (0.0) and full wrapping (1.0).

Lift

Additional offset in surface normal direction.

Attribute Transfer

Transfering of geometry attributes to the proxy geometry (enabled by default). See AttribTransfer for the parameter details.

Postprocessing

An optional smoothing of the proxy results. See Smooth for the parameter details.

Dependencies

Uses the following operator(s):

Release Notes

interface version 1 –

2012-10-03

  • Fix: now uses the namespaced version of Xform-to-BBox, internally

  • Fix: Primitive groups were re-created even in 'by name attribute' mode – this is now fixed.

old (non-namespaced) versions –

Version 0.0.2

  • Support for fracture grouping with a name attribute (H12+).

  • 'Custom' proxy type now works (it uses the Xform to BBox qL SOP).

Version 0.0.1

Initial release.