*morphnodesvectoroffset

Syntax

*morphnodesvectoroffset m_entity_type m_mark_id e_entity_type e_mark_id f_entity_type f_mark_id a_node b_node nproj c_vec integ mbias fbias envelope undisplayed offset

Type

HyperMesh Tcl Modify

Description

This command will move the selected nodes to a line extending from a_node to b_node and extrapolated to infinity in both directions. The moving nodes may be projected to the line a long a vector, normal to the line, or normal to any elements attached to the nodes. 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 no elements are selected and nproj is 2, 5 or 6, all elements in the model are used to determine projection vectors.

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.

If offset is non-zero, the moving nodes will be offset from the mesh by the specified amount.

Inputs

m_entity_type

Must be set to nodes.

m_entity_mark

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

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_node

The ID of the base node for the vector onto which the nodes will be projected.

b_node

The ID of the pointer node for the vector onto which the nodes will be projected.

nproj

0 or 10 – Project along vector given by c_vec

1 or 11 – Project normal to target mesh

2 or 12 – Project normal to attached elements

5 or 15 – Project normal to attached elements using smoothed normals

6 or 16 – Project normal to attached elements using CFD corners

If offset is non-zero, the offset will be measured from the closest point along the target vector for values of 0, 1, 2, 5 and 6. The offset will be measured along the projection vector or normal for values of 10, 11, 12, 15, and 16.

c_vec

The ID of vector created using *createvector for the projection direction (nproj=0). Must be set to 1.

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.

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.

undisplayed

If integ is set to 3, 6, or 7, nodes which are not displayed can be affected by the morphing. This defines how undisplayed nodes are handled:

0 - Morph nodes on undisplayed elements

1 - Fix nodes on undisplayed elements, they will function just like nodes on the fixed mark

2 - Exclude nodes on undisplayed elements, they will not be morphed nor affect the morphing

offset

The distance to offset nodes from the target.

The offset will be measured from the closest point along the target vector for values of nproj of 0, 1, 2, 5 and 6. The offset will be measured along the projection vector normal for values of nproj of 10, 11, 12, 15 and 16.

Example

To move a mark of nodes normal and offset 1.2 from a vector defined by nodes 52 and 53 and stretch all the elements in the model using the existing domains:

*createmark nodes 1 11 12 13
*createmark elems 1 "all"
*createmark nodes 2 21 22 23
*createvector 1 1.0 0.0 0.0
*morphnodesvectoroffset nodes 1 elems 1 nodes 2 52 53 0 1 1 1.0 1.0 0.0 0 1.2

Errors

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

Version History

14.0.110