Houdini 20.0 Nodes Geometry nodes

Bone Solidify geometry node

Converts surface geometry to a tetrahedral mesh for use as anatomical bones in a tissue system.

This node type is hidden. It is no longer supported.
Since 19.0

Deprecated

The Bone Solidify SOP is no longer supported. See Muscles Overview and Muscles and tissue workflow for more information.

The Bone Solidify SOP iterates over each piece of the input surface geometry and converts it to a tetrahedral mesh using Tet Conform. The input surfaces can arrive as animated geometry, and thus will produce animated output reconstructed as a tetrahedral mesh. This SOP is part of the Tissue System.

Parameters

Make Solid

These parameters control the size and density of the output tetrahedra.

Min Size

A minimum target edge length on the exterior of the bone pieces. The surface curvature determines the ideal target size to retain details, however, if the target size is less than this value, the remesher uses this value.

Max Size

A maximum target edge length on the exterior of the bone pieces. The surface curvature determines the ideal target size to retain details, however, if the target size is greater than this value, the remesher uses this value.

Gradation

The rate at which edge lengths are allowed to change from one surface triangle to the next. Higher values generate fewer triangles but overall quality is lower.

Max Interior Tet Scale

This parameter controls the maximum size of individual generated tets on the interior of bone pieces.

T-Pose

This is the static rest position that is converted to a tetrahedral mesh. If your input mesh is animated, it will be converted according to the position defined by the T-Pose, and the resulting mesh will be deformed to conform to the incoming animated positions.

T-Pose Source

Use Start Frame

Timeshift the input geometry animation to the specified frame number, and perform the conversion.

Frame

The frame to use for the conversion.

From File

Read a file from disk and use as your conversion source. The file must have the exact same topology as the input geometry.

Geometry File

The path to the T-Pose geometry file.

From Referenced Geometry

Specify a SOP to use as the static T-Pose. The SOP must have the exact same topology as the input geometry.

SOP Path

The path to the SOP that represents the T-Pose.

Bone Animation

These parameters specify how to apply the incoming animation onto the tetrahedral meshes.

Bone Animation

Point Deform

Deform the output tet mesh by using the input geometry as a deformation lattice.

Bone Capture/Deform

If the input geometry has boneCapture attributes, deform the output tet mesh using linear blend skinning deformation.

Transform Rigid Pieces

Transform each piece of the tet mesh output according to the transformation derived from the corresponding piece of the input geometry.

Radius

This parameter is enabled when the Bone Animation is set to Point Deform. The Radius specifies the maximum distance to look for points in the deforming input animation. Increasing the Radius of the search can have a smoothing effect of the resulting deformation.

Minimum Points

This parameter is enabled when the Bone Animation is set to Point Deform. The minimum number of points to be used when looking up points in the deforming input animation.

Maximum Points

This parameter is enabled when the Bone Animation is set to Point Deform. The maximum number of points to be used when looking up points in the deforming input animation.

Override Skeleton Root Path

This parameter is enabled when the Bone Animation is set to BoneCapture Deform. Use this toggle to change the relative root for the boneCapture attributes found on the input geometry.

Skeleton Root Path

The path points to the top of the object hierarchy where relative boneCapture paths will be traversed.

File Cache

These parameters allow for reading and writing the converted tet mesh animation to disk.

Load From Disk

Switches between passing through the input geometry and loading the geometry from disk.

Reload Geometry

Re-imports the geometry from disk.

Geometry File

Where to load the geometry from when in Load from Disk mode. This also controls where the Geometry ROP will save the geometry.

Save to Disk

Saves the geometry to disk.

Valid Frame Range

Limits the rendering of frames, when set to Render frame range or Render frame range only.

Save Current Frame

Save only the geometry generated at the current frame.

Save Frame Range

Generate the frames in the range set below, but allow the writing to other frames if they are referenced by in-range frames.

Save Frame Range Only (Strict)

Generate the frames in the range set below, and don’t allow writing to other frames, even if they are referenced by in-range frames.

See also

Geometry nodes