Houdini 20.0 Nodes Geometry nodes

Blend Shapes geometry node

Computes a 3D metamorphosis between shapes with the same topology.

Blend Shapes can blend between its inputs using average weights of each input’s respective channel. It interpolates point colors and/or texture co-ordinates between shapes.

Parameters

Group

Points or primitives in the first input to be blended.

Differencing

Exaggerates blends between objects where values above 1 or less than 0 will result in over-scaled shapes.

Selection Index

Specifies which input to use when generating the cooked selection.

Blend Position

Enables blending of point positions.

Blend Colors

Enables blending of point colors and alphas.

Blend Normals

Enables blending of point normals.

Blend Texture

Enables blending of texture coordinates.

Blend Voxel Data

Matching volumes will blend their data. This is not done by spatial position, but by absolute voxel index.

Shortest Path Transform Blending

Enables use of spherical linear interpolation to blend primitive transforms.

Point Id Attribute

If this attribute exists, it will be used to find corresponding points in the different blend shapes. For example, using id will allow particle systems to find matching points even if particles are deleted. If it does not exist or is blank, point numbers will be used for the matching.

Primitive Id Attribute

If this attribute exists, it will be used to find corresponding primitives in the different blend shapes. For example, using name will allow fluid systems to find matching volumes even if volumes are reordered. If it does not exist or is blank, primitive numbers will be used for the matching.

Assume Only Coordinate Changes In Input

This accelerates the blend speed when there exists an animated input that only has changing point positions. Unpredictable results will occur with this enabled if attributes or topology changes.

Assume Morph Network Setup

This accelerates the blend speed when the inputs have the particular wiring the Morph tool creates. The blend speed can be accelerated when the following three properties are true:

  1. All of the inputs to the BlendShapes SOP after the first input are Edit SOPs.

  2. The first input to the BlendShapes SOP is the same as the first input to all of the Edit SOPs.

  3. If the Edit SOPs have a second input, they must all be the same.

Blends

Controls contribution of geometry inputs.

See also

Geometry nodes