Houdini 13.0 Nodes

interface version 1

Sets (fractured) rigid bodies' active state and/or their transformation (for inactive objects).

This node can set the active/inactive state of RBD fractured objects, either by setting it for all of them, or by using a per-point attribute from a SOP geometry to activate (or deactivate) the corresponding RBD fracture.

Additionally, it supports transforming inactive RBD fractures with an Object (OBJ) node. Any animation coming from the object will be inherited as motion if an RBD object becomes active.

Note

There’s no support yet for simulation/animation blending when deactivating objects transformed by simulation.

Parameters

DOP

Common DOP parameters. (For more detailed description, see the help of any other DOP node.)

Activation

Determines if this node should do anything on a given timestep and for a particular object. If this parameter is an expression, it is evaluated for each object (even if data sharing is turned on).

If it evaluates to a non-zero value, then the data is attached to that object. If it evaluates to zero, no data is attached, and data previously attached by this node is removed.

Group

This parameter can be used to choose a subset of those objects to be affected by this node.

Data Name

Indicates the name that should be used to attach the data to an object or other piece of data.

Unique Data Name

Turning on this parameter modifies the Data Name parameter value to ensure that the data created by this node is attached with a unique name so it will not overwrite any existing data.

Activation

RBD activation and transformation-related parameters.

Active

The “active” state of the RBD object(s), if the per-point SOP attribute option is not used.

Use SOP (Per-Point) Attribute

If enabled, the active state of each RBD object will be determined by a corresponding per-point attribute of a SOP geometry.

(To build such a geometry with the correct point order, use a PrimGroup Centroids qL SOP.)

SOP Path

Path to the SOP node to get the active values from.

Attribute

Name of the per-point (float) attribute on the SOP geometry to be used for “active” values.

Transform OBJ

If enabled, inactive RBD objects will be transformed by the specified object (OBJ) node.

Release Notes

interface version 1

2013-09-25

Added “nope/nope” empty SOP path to avoid (otherwise harmless) warnings.

2013-05-09

First prototype.