Houdini 20.5 Nodes Geometry nodes

RBD Deforming to Animated geometry node

Converts deforming geometry to animated static packed objects.

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Since 19.0

Overview

This node unpacks the input geometry and proxy geometry, freezes it at a given reference frame, repacks it, and drives its packed transforms by extracting the transforms from the deforming pieces. This is useful if you want to activate objects after a specific frame (but use them as animated objects rather than deforming objects before then), or if you want objects to collide with RBDs.

Tip

If you're only wiring this node into the Collision Geometry input of the RBD Material Fracture node, make sure it’s the Proxy Geometry output rather than the high res Geometry output, since that’s where the active and animated attributes are set.

Parameters

Pack

Reference Frame

The frame at which the geometry will be “frozen”.

Transfer Attributes

Specifies a list of attributes to transfer to the packed geometry.

Transfer Groups

Specifies a list of groups to transfer to the packed geometry.

Transform

Extract

Specifies how to compute the best-fit transform between the reference and target geometry.

Translation and Rotation

Finds the rigid transform that best aligns the points with the target geometry.

Translation, Rotation, and Uniform Scale

Allows the points to be uniformly scaled, in addition to being translated and rotated.

Translation, Rotation, and Non-Uniform Scale

Allows the points to be non-uniformly scaled, in addition to being translated and rotated.

Full Transform

Finds the transform that best aligns the points with the target geometry. This may include shears or non-uniform scales.

Point Velocities

Controls whether point velocities will be calculated for the geometry from this SOP, and the method of calculation. The instantaneous and integrated velocity calculations are described in Point Velocities.

Update RBD Constraints

Performs the same operation on the constraint geometry when enabled.

Configure Animated Static Object

Sets an “animated” point attribute with a value of 1 and a “active” point attribute with a value of 0.

The action button will create a RBD Configure SOP downstream from this node to better configure the properties of the RBD objects.

Inputs

Geometry

Input deforming geometry to be frozen, packed and transformed.

Constraint Geometry

Constraint geometry.

Proxy Geometry

Proxy deforming geometry to be frozen, packed and transformed. The transforms will be extracted from this geometry if available.

See also

Geometry nodes