Houdini 21.0 Nodes Geometry nodes

GLTF Animation Import geometry node

Imports animation data from a glTF file as a geometry-based skeleton.

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Since 21.0

Parameters

Import

GLTF FIle

The path to the glTF file to import (*.gltf or *.glb).

Reload

Reloads the glTF file. This is useful if the glTF file has changed on disk.

Animation ID

The ID of the animation within the glTF file to import. If the animation has a name, it is displayed to the right of this parameter.

Skeleton Color

The point color used for the output skeleton’s Cd point attribute.

Timing

Method

The time units for specifying animation parameters.

By Time

The timing parameters below will be specified in seconds.

By Frame

The timing parameters below will be specified in frames.

Time

The time (in seconds) to import the animated pose from.

Animation Start

The time at which the source animation starts, when Method is set to By Time. Earlier poses will be clamped to this value. When turned off, this value is taken from the source animation where available. If it has no range information, Houdini’s scene start ($TSTART) value will be used.

Note that no clamping is done when this is turned off.

Animation End

The time at which the source animation ends, when Method is set to By Time. Later poses will be clamped to this value. When turned off, this value is taken from the source animation where available. If it has no range information, Houdini’s scene end ($TEND) value will be used.

Note that no clamping is done when this is turned off.

Playback Start

The destination time at which the specified animation will begin to playback, when Method is set to By Time. When turned off, Houdini’s scene start ($TSTART) value is used.

Frame

The frame number to import the animated pose from.

Animation Start

The frame at which the source animation starts, when Method is set to By Frame. Earlier poses will be clamped to this value. When turned off, this value is taken from the source animation where available. If it has no range information, Houdini’s scene start ($FSTART) value will be used.

Note that no clamping is done when this is turned off.

Animation End

The frame at which the source animation ends, when Method is set to By Frame. Later poses will be clamped to this value. When turned off, this value is taken from the source animation where available. If it has no range information, Houdini’s scene end ($FEND) value will be used.

Note that no clamping is done when this is turned off.

Playback Start

The destination frame at which the specified animation will begin to playback, when Method is set to By Frame. When turned off, Houdini’s scene start ($FSTART) value is used.

Speed

Sets the speed factor for the playback of the animation. This is applied after any clamping is performed by the Animation Start and Animation End parameters.

Attributes

clipinfo

This detail attribute records the current animation range and sample rate, as well as the original animation range and sample rate of the imported animation.

name

Point attribute containing a unique name across all points used for identification. This is derived from the corresponding FBX node name. However, FBX node names may not be unique. For these cases, the names will be suffixed with 1, 2, 3, etc.

path

point

Contains the hierarchical path to the FBX node that corresponds to the point. The ROP FBX Animation Output SOP uses this attribute when determining where to export the point’s transforms.

If the rest geometry input contains a primitive path attribute, it is also used similarly for creating the corresponding FBX node hierarchy. Furthermore, any intermediate nodes that start with LODGroup are created as an LODGroup FBX node instead of as a Null. This allows the meshes to be interpreted as LOD meshes by supporting applications like Unreal.

transform

This 3×3 matrix point attribute specifies the world transform for the point. While the world position of the point is still P, this transform encodes the world transform’s rotation, scale, and shear components.

gltf_animation_name

The name of the glTF animation. If this property is not set in the glTF file, this attribute will be empty.

See also

Geometry nodes