*morphnodeslineoffset

Moves the selected nodes to a line while morphing the affected elements.

Syntax

*morphnodeslineoffset e_entity_type e_mark_id f_entity_type f_mark_id t_line_list t_node_list m_node_list nproj c_vec integ mbias fbias envelope undisplayed offset

Type

HyperMesh Tcl Modify Command

Description

This command will move the selected nodes to a line. The moving nodes may be projected to the line along 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 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 line by the specified amount.

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.
t_line_list: The ID of the line list for the line to which the nodes will be moved. Valid values are 1 and 2.
t_node_list: The ID of the node list for the line to which the nodes will be moved. Valid values are 1 and 2.
m_node_list: The ID of the node list for the moving nodes. Valid values are 1 and 2.
nproj: 0 or 10 - Project along vector given by c_vec; 1 or 11 - Project normal to lines; 2 or 12 - Fit nodes to line; If offset is non-zero, the offset will be measured from the closest point on the lines for values of 0 and 1. The offset will be measured along the projection vector or normal for values of 10 and 11. Offsets will not be applied for a value of 2.
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 on the lines for values of nproj of 0 and 1. The offset will be measured along the projection vector normal for values of nproj of 10 and 11.

Example

To move a mark of nodes to be offset 1.2 from a line normal to the line and stretch all the elements in the model using the existing domains:

*createmark elems 1 "all"
*createmark nodes 1 21 22 23
*createlist lines 1 2
*createlist nodes 1 31 32
*createlist nodes 2 51 52 53 54
*createvector 1 1.0 0.0 0.0
*morphnodeslineoffset elems 1 nodes 1 1 1 2 0 1 1 1.0 1.0 0.0 0 1.2

Errors

Incorrect usage results in a Tcl error. To detect errors, you can use the catch command:

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

Version History

14.0.110