*extract_skeleton
Extracts the skeleton of a 3D model as a group of 1D elements.
Syntax
*extract_skeleton entity_type=<value> mark_id=<mark_id> resolution=<value> ?option1=<value1>? ?option2=<value2>? … ?optionN=<valueN>?
Type
HyperMesh Tcl Modify Command
Description
This command extracts the skeleton of a 3D model, representing it as a group of 1D elements. The refinement level of the skeleton is determined by the resolution parameter. Additionally, branches and individual 1D elements below specified length thresholds can be pruned or collapsed.
Before calling this command, it is recommended to fill all larger gaps and holes in the model. If this is not done, the command will automatically fill gaps and holes with a maximum width of 4 times the resolution provided. The patches used to fill these gaps and holes are organized in a separate component named "^Patch".
Inputs
- entity_type=<value>
- The type of input entities. Valid values are elements, components, parts, surfaces, and solids.
- mark_id=<mark_id>
- The ID of the mark containing the input entities. Valid values are 1 and 2.
- resolution=<value>
- The resolution determining the refinement level of the skeleton. The value must be a positive double, typically small compared to the general dimensions of the input model.
- collapse_threshold=<value>
- The length threshold below which individual 1D elements will be collapsed. The value must be a positive double (default 0.0).
- prune_threshold=<value>
- The length threshold below which branches consisting of one or more 1D elements will be deleted. The value must be a positive double (default 0.0).
Examples
*createmark elems 1 displayed
*extract_skeleton entity_type=elems mark_id=1 resolution=<value>*createmark solids 2 displayed
*extract_skeleton entity_type=solids mark_id=2 resolution=10 collapse_threshold=20 prune_threshold=100Errors
if { [ catch {command_name...} ] } {
# Handle error
}Version History
2025