Houdini 22.0 Nodes Object nodes

glTF object node

Since 17.0

The glTF hierarchy importer can import a glTF scene as a network of nodes or as flattened geometry. See the following link for further information about the glTF format.

Note

See the following link for an overview of importing and exporting GLTF files to and from Houdini.

The follow table provides further details about which glTF features and extensions are supported, plus any relevant notes about how they are supported:

glTF Property or Extension

Supported

Notes

Scene

The glTF scene specified by the Scene parameter will be imported as an Object network with the same node hierarchy as the glTF scene.

Node

Corresponding Houdini nodes will be created for glTF nodes imported from the selected glTF scene.

Mesh

glTF nodes with an associated mesh will be imported as a Houdini geometry node containing a SOP GLTF node that is responsible for importing the mesh.

Mesh Primitive (Points)

-

Mesh Primitive (Lines)

-

Mesh Primitive (Triangles)

Mesh primtiives of mode TRIANGLES are supported and will be imported. Mesh primitives with an unsupported mode will be ignored.

Camera

glTF nodes with an associated camera will be imported as a camera node.

Skin

-

Morph Target

-

Animation (Transform Target)

-

Animation (Weight Target)

-

Material

glTF materials will be imported as a Principled Shader node and imported geometry will be assigned the corresponding Principled Shader node as its material.

Texture

Only textures associated with a glTF material will be imported. Imported textures will be assigned to the appropriate texture map on Principled Shader materials that the texture is associated with.

KHR_draco_mesh_compression Extension

-

KHR_lights_punctual Extension

-

Parameters

File Name

The glTF file to. The loading method depends on the extension of the file loaded.

Files with a .glb extension be treated as binary GLB files.

Files with a .gltf extension will be loaded as normal JSON data.

Asset Extraction Folder

Textures packed into a glTF binary buffer or represented as base64 data must be unpacked before usage.

This field specifies the location textures are to be unpacked on disk.

Scene

Select the scene to import from the glTF object.

In the absence of a scene name, the label will be based off the scene index.

Build Scene

Build the scene from the input parameters. If the scene was loaded previously, this will reload the scene hierarchy and geometry.

Lock Geometry

Enable this option to lock any geometry nodes created during scene building.

Flatten Hierarchy

Flatten all nodes in the scene down to a single node containing all the geometry.

Promote Point Attributes To Vertex

Promote all point attributes (excluding P) to vertex attributes.

Points Merge Distance

When Promote Point Attributes To Vertex is enabled, points within this distance to each other will be merged.

Filter Options

Import Geometry

Enable this option to import geometry objects. When disabled, glTF meshes will be loaded as empty Geometry nodes.

Import Custom Attributes

Enable this option to import any custom attributes from glTF primitives.

Custom attributes in glTF are prefixed with an underscore _ which will be stripped during import.

Import Materials

Enable this option to import glTF materials as Principled Shader materials. This also creates material assignments.

If this option is disabled, materials and material assignments will not be created.

Import Non-Geometry

Import nodes which do not create or transform any geometry. Disable this to remove unused nodes when the additional hierarchical data is unneeded.

Import Unused Materials

Import all materials available, even if they are not assigned or used by the imported scene.

Object nodes

  • Agent Cam

    Create and attach camera to a crowd agent.

  • Alembic Archive

    Loads the objects from an Alembic scene archive (.abc) file into the object level.

  • Alembic Xform

    Loads only the transform from an object or objects in an Alembic scene archive (.abc).

  • Ambient Light

    Adds a constant level of light to every surface in the scene (or in the light’s mask), coming from no specific direction.

  • Auto Bone Chain Interface

    The Auto Bone Chain Interface is created by the IK from Objects and IK from Bones tools on the Rigging shelf.

  • Blend

    Switches or blends between the transformations of several input objects.

  • Blend Sticky

    Computes its transform by blending between the transforms of two or more sticky objects, allowing you to blend a position across a polygonal surface.

  • Bone

    The Bone Object is used to create hierarchies of limb-like objects that form part of a hierarchy …

  • Camera

    You can view your scene through a camera, and render from its point of view.

  • Common object parameters

  • Dop Network

    The DOP Network Object contains a dynamic simulation.

  • Environment Light

    Environment Lights provide background illumination from outside the scene.

  • Fetch

    The Fetch Object gets its transform by copying the transform of another object.

  • Formation Crowd Example

    Crowd example showing a changing formation setup

  • Fuzzy Logic Obstacle Avoidance Example

  • Fuzzy Logic State Transition Example

  • Geometry

    Container for the geometry operators (SOPs) that define a modeled object.

  • Groom Merge

    Merges groom data from multiple objects into one.

  • Guide Deform

    Moves the curves of a groom with animated skin.

  • Guide Groom

    Generates guide curves from a skin geometry and does further processing on these using an editable SOP network contained within the node.

  • Guide Simulate

    Runs a physics simulation on the input guides.

  • Hair Card Generate

    Converts dense hair curves to a polygon card, keeping the style and shape of the groom.

  • Hair Card Texture Example

    An example of how to create a texture for hair cards.

  • Hair Generate

    Generates hair from a skin geometry and guide curves.

  • Handle

    The Handle Object is an IK tool for manipulating bones.

  • Indirect Light

    Indirect lights produce illumination that has reflected from other objects in the scene.

  • Instance

    Instance Objects can instance other geometry, light, or even subnetworks of objects.

  • LOP Import

    Imports transform data from a USD primitive in a LOP node.

  • LOP Import Camera

    Imports a USD camera primitive from a LOP node.

  • Labs Fire Presets

    Quickly generate and render fire simulations using presets for size varying from torch to small to 1m high and low

  • Labs Impostor Camera Rig

    This OBJ sets up a camera rig to be used with the Impostor Texture ROP

  • Labs LOD Hierarchy

    Creates and export an LOD Hierarchy as FBX.

  • Labs Render Geometry

    Renders cached or merged geometry with controlled loading, display, and render settings.

  • Light

    Light Objects cast light on other objects in a scene.

  • Light template

    A very limited light object without any built-in render properties. Use this only if you want to build completely custom light with your choice of properties.

  • Microphone

    The Microphone object specifies a listening point for the SpatialAudio CHOP.

  • Mocap Acclaim

    Import Acclaim motion capture.

  • Mocap Biped 1

    A male character with motion captured animations.

  • Mocap Biped 2

    A male character with motion captured animations.

  • Mocap Biped 3

    A male character with motion captured animations.

  • Null

    Serves as a place-holder in the scene, usually for parenting. this object does not render.

  • Path

    The Path object creates an oriented curve (path)

  • PathCV

    The PathCV object creates control vertices used by the Path object.

  • Python Script

    The Python Script object is a container for the geometry operators (SOPs) that define a modeled object.

  • Ragdoll Run Example

    Crowd example showing a simple ragdoll setup.

  • Reference Image

    Container for the Copernicus operators (COP) that define a picture.

  • Rivet

    Creates a rivet on an objects surface, usually for parenting.

  • Simple Biped

    A simple and efficient animation rig with full controls.

  • Simple Female

    A simple and efficient female character animation rig with full controls.

  • Simple Male

    A simple and efficient male character animation rig with full controls.

  • Sound

    The Sound object defines a sound emission point for the Spatial Audio chop.

  • Stadium Crowds Example

    Crowd example showing a stadium setup

  • Stereo Camera Rig

    Provides parameters to manipulate the interaxial lens distance as well as the zero parallax setting plane in the scene.

  • Stereo Camera Template

    Serves as a basis for constructing a more functional stereo camera rig as a digital asset.

  • Sticky

    Creates a sticky object based on the UV’s of a surface, usually for parenting.

  • Street Crowd Example

    Crowd example showing a street setup with two agent groups

  • Subnet

    Container for objects.

  • Switcher

    Acts as a camera but switches between the views from other cameras.

  • TOP Network

    The TOP Network operator contains object-level nodes for running tasks.

  • VR Camera

    Camera supporting VR image rendering.

  • Viewport Isolator

    A Python Script HDA providing per viewport isolation controls from selection.

  • glTF