*morphinterpolatesurf

Syntax

*morphinterpolatesurf n_entity_type n_mark_id e_entity_type e_mark_id sizbld buffer ndens mode plane node_id system_id line_list node_list sym con covar drift nugget nugval symm type draw offset sym_plane model_shape node1_id node2_id

Type

HyperMesh Tcl Modify

Description

This command will morph the elements on e_mark_id, or those of an internally generated mesh, to a surface interpolated from the nodes or lines on n_mark_id. The mode specifies the general shape of the interpolated surface (and internally generated mesh) and requires either a specified plane, line, node, node list, or system to orient the shape. This command may also be used to generate a surface using the interpolated surface but is limited to support only a plane as the general shape of the interpolated surface.

For a generated mesh the sizbld option can be used to specify the number of elements per side (for a rectangular mesh) or per 45 degree section (for a non-rectangular mesh), or it can be used to specify the average element size. For an existing mesh (e_mark_id) sizbld is the blend factor % which allows you to blend the difference between the shape of the existing mesh and the shape of the interpolated surface. A higher blend factor means that the mesh will match closer to the interpolated surface.

Covariance, drift, nugget, and nugget value are parameters sent to the Kriging algorithm which calculates the interpolated surface. Good default values are "h" for covariance, "linear" for drift, and "off" for the nugget.

Inputs

n_entity_type

Valid values are nodes and lines.

n_mark_id

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

e_entity_type

Must be set to elems.

e_mark_id

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

sizbld

If the element mark is empty:

< 0 - Element density of generated mesh (or surface for mode 8)

> 0 - Average element size of generated mesh

If the element mark contains elements:

blend factor % (0.0 - 100.0)

buffer

% increase in the size of the generated mesh before morphing to interpolated surface (0.0 - 100.0) - intended mainly for planar meshes (modes 0 and 8)

ndens

Number of nodes created on lines for interpolated surface.

mode

Shape of generated mesh and general shape of interpolated surface:

0 – plane

1 – cylinder

2 – sphere

3 – ellipse

4 – cylinder about node list

5 – cylinder about line

6 – enclosed cylinder about nodelist

7 – enclosed cylinder about line

8 – plane - create a surface instead of a mesh

plane

Temporary plane ID for orientation or cylinder axis (modes 0, 1 and 8)

node_id

ID of center node of sphere or ellipse (modes 2 and 3)

system_id

ID of local system for ellipse (mode 3)

line_list

Line list ID (modes 5 and 7)

node_list

Node list ID (modes 4, 5, 6, and 7)

sym

0 – Do not use symmetry links

1 – Use symmetry links

con

0 – Do not use constraints

1 – Use constraints

covar

Covariance for Kriging algorithm:

0 – h

1 – h^2log(h)

2 – h^3

3 – exp(-1/x)

drift

Drift type for Kriging algorithm:

0 – no drift

1 – constant

2 – linear

3 – quadratic

4 – cubic

5 – trigonometric

nugget

0 – off

1 – on

nugval

The value of nugget for Kriging algorithm.

symm

0 – No symmetric surface is created (mode 8 only)

1 – Symmetric surface is created (mode 8 only)

type

0 – Smooth surface is created (mode 8 only)

1 – Developable surface is created (mode 8 only)

draw

Draw depth used to position the surface below the part (mode 8 only)

offset

Used to increase the size of the surface while maintaining tangency (mode 8 only)

sym_plane

Temporary symmetry plane ID (mode 8 only)

model_shape

0 – The surface is created using the half model given by symplane (mode 8 only)

1 – The surface is created using the complete model (mode 8 only)

node1_id

Base point of vector defining the developable direction (mode 8 only). Can be set to zero for other modes.

node2_id

End point of vector defining the developable direction (mode 8 only). Can be set to zero for other modes.

Examples

To morph a mesh to a surface interpolated from nodes which is roughly planar:

*createmark nodes 1 1 2 3 4 5 6 7 8
*createmark elems 1 "all"
*createplane 1,1.0 0.0 0.0 1.0 0.0 0.0
*createlist lines 1
*createlist nodes 1
*createplane 2,1.0 0.0 0.0 1.0 0.0 0.0
*morphinterpolatesurf nodes 1 elems 1 100.0 10.0 0 0 1 0 0 1 1 1 1 0 2 0 0.0 0 0 0.0 0.0 2 0 0 0

To generate a mesh, with 10 elements per 45 degree spherical section, and morph it to a surface interpolated from lines which is roughly spherical and oriented with a given system with a node as the origin:

*createmark lines 1 1 2 3 4 5 6 7 8
*createmark elems 1
*createplane 1,1.0 0.0 0.0 1.0 0.0 0.0
*createlist lines 1
*createlist nodes 1
*createplane 2,1.0 0.0 0.0 1.0 0.0 0.0
*morphinterpolatesurf nodes 1 elems 1 -10.0 10.0 10 2 1 45 3 1 1 1 1 0 2 0 0.0 0 0 0.0 0.0 2 0 0 0

Errors

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

Version History

10.0