Houdini 20.5 Nodes Geometry nodes

COP2 Network geometry node

Imports 2d geometry from a Composite network.

Old network

As of Houdini 20.5, use Copernicus nodes instead of Compositing nodes. Though both networks still exist, the Compositing network is now designated as COP Network - Old. The Compositing network and its nodes will be deprecated and then removed in a future Houdini release.

An image can be represented as a 2d volume. The COP2 Network node will evaluate an image generated by a COP2 network and create matching volumes or meshes.

Parameters

Use External COP

Because the node contains a composite network, the output of the internal composite network is used if this is not selected.

COP Path

The path to a composite network to fetch an image from, if the internal network is not used.

Frame

Which frame of the composite network to fetch.

Source Planes

An image can have many planes other than the traditional C and A. This will determine which planes are imported. They will be imported as attributes for meshes and as separate volumes in volume modes.

Method

How to generate geometry from the composite network.

Volume Slice

A 2d volume is created for each plane and component of the composite. Each volume is named according to the source plane.

Volume

A 3d volume is created for each plane and component of the composite network. The z-axis represents time. This will require cooking the composite network over its entire frame range so may require significant time and memory, but allows for interesting effects over time.

Mesh

A mesh primitive is created to represent the image. Point attributes on the primitive to hold the plane data.

Note

The C and A planes will be converted to Cd and Alpha attributes.

Points

Points are generated for each pixel in the image. Point attributes are created to hold the plane data.

Note

The C and A planes will be converted to Cd and Alpha attributes.

Quad with UVs

A single quad is built with appropriate UVs to texture map the composite network. This is useful for setting up the effects of the 3d-space positioning tools and aspect ratio.

Plane

Which plane to align the generated meshes with.

Note

For volume generation, this will affect which axes of the volume the pixel data is stored into.

Sampling

When extracting pixel data from an image the data on a pixel may be considered to represent the center of the pixel or the corner. Center sampling works best for tiling, but may result in what appears to be a half-pixel shrink of the generated volume.

Center

The location of the center of the generated geometry.

Uniform Scale

Regardless of resolution, the geometry is generated so the largest axis is unit size. This will then scale it so the largest axis matches this size.

Visualize

Adds visualization attributes to the volumes so the default C and A planes are used for viewport shading.

Geometry nodes