*morphnodesshapeenvelope

Syntax

*morphnodesshapeenvelope e_entity_type e_mark_id f_entity_type f_mark_id a_shape integ mbias fbias mult envelope undisplayed

Type

HyperMesh Tcl Modify Command

Description

This command will apply the specified shape to the mesh be a factor specified by mult. The fixed nodes are held in place and the affected elements (or all unfixed nodes in the model if integ is 3 or 6) are stretched according to the value of integ.

Temporary handles are created for all moving and fixed nodes to determine the stretching of the affected elements. If integ is 0, a general domain is temporarily created for the affected elements. If integ is 1, the domains currently in the model are used. If integ is 2, 1D, 2D, 3D, and edge domains are temporarily created for the affected elements but the 2D domains are not partitioned. If integ is 3, then handle influences are applied using a spatial relationship rather than through a domain. If integ is 4, only the selected moving nodes are moved and all others are held fixed. If integ is 5, 1D, 2D, 3D, and edge domains are temporarily created for the affected elements and the 2D domains are partitioned. Any handles created due to partitioning are moved based on their distance from the moving and fixed nodes. If integ is 6, then handle influences are applied using the Kriging algorithm. If integ is 7, then handle influences extend only up to a given distance (if envelope is positive) or a given multiple of the applied perturbations (if envelope is negative) away from the moving nodes.

The bias factors function as they would for handles except that all moving nodes will have the mbias value and all fixed nodes will have the fbias value.

If integ is set to 3, 6, or 7, nodes on undisplayed elements and components can be morphed, fixed, or excluded depending on the value of undisplayed.

Inputs

e_entity_type

Must be set to elems.

e_entity_mark

The mark ID of the affected elements. Valid values are 1 and 2.

f_entity_type

Must be set to nodes.

f_entity_mark

The mark ID of the fixed nodes. Valid values are 1 and 2.

a_shape

The ID of the shape to be applied.

integ

0 - Free edges (a single general domain)

1 - Use existing domains

2 - Inferred edges (1D, 2D, 3D, and edge domains - no partitioning)

3 - Morph all nodes using a proximity algorithm

4 - Morph all moving nodes and fix the unselected nodes

5 - Partitioned edges (1D, 2D, 3D, and edge domains with partitioning)

6 - Morph all nodes using the Kriging algorithm

7 - Morph all nodes within an envelope around the moving nodes

mbias

Bias factor of moving nodes.

fbias

Bias factor of fixed nodes.

mult

The multiplication factor for the shape.

envelope

If positive, all nodes beyond the given distance away from the moving nodes will be fixed.

If negative, all nodes beyond a distance calculated by multiplying the total perturbation of each moving node by the absolute value of the envelope and extended away from each moving node will be fixed.

If integ is set to 7, the calculated distance defines an envelope around the moving nodes within which the morphing of those nodes will linearly taper from fully matching the nearest moving node to zero at the edge of the envelope. If any fixed nodes are within the envelope they will also reduce the morphing of nearby nodes.

Example

To apply a shape 3 times the original perturbation and stretch all the elements in the model using the existing domains:

*createmark elems 1 "all"
*createmark nodes 1 21 22 23
*morphnodesshapeenvelope elems 1 nodes 1 14 1 1.0 1.0 3.0 0.0 0

Errors

if { [ catch {command_name...} ] } {
   # Handle error
}

Version History

12.0.110