hm_getconnected2delems

Returns lists of 2D shell elements and nodes that form t-connections or share edges at component boundaries.

Syntax

hm_getconnected2delems entity_type mark_id string_array number_of_strings

Type

HyperMesh Tcl Query Command

Description

Returns lists of 2D shell elements and nodes that form t-connections or share edges at component boundaries. Advanced options are available to categorize the connected entities (T-connected, L-connected, Butt-connected or Overlap connected), as well as to specify the format of the return values.

Elements that have t-connected edges and have a feature larger than the specified feature angle are considered t-connected, with the remainder being overlap-connected.

Similarly, elements that have shared edges and have a feature larger than the specified feature angle are considered l-connected, with the remainder being butt-connected.

The return from this command are lists of 2D elements and/or nodes. Each list is a unique continuous connection, based on the specified options. A unique connection is defined as one that is of a single type and spans only a single boundary.

For example, if element output only is requested:

{type1 elems elems1_1 elems1_2 … elems1_N} {type2 elems elems2_1 elems2_2 … elems2_N} …

For example, if node list output only is requested:

{type1 nodes nodes1_1 nodes1_2 … nodes1_M} {type2 nodes nodes2_1 nodes2_2 … nodes2_M} …

For example, if node list and element output is requested:

{type1 elems elems1_1 elems1_2 … elems1_N} {type2 elems elems2_1 elems2_2 … elems2_N} {type1 nodes nodes1_1 nodes1_2 … nodes1_M} {type2 nodes nodes2_1 nodes2_2 … nodes2_M} …

Inputs

entity_type
The type of entity to query. Valid values are comps and elems. Only 2D shell elements are considered from the input.
mark_id
The ID of the mark containing the entities. Valid values are 1 and 2.
string_array
The ID of the string array that contains the additional input options. The string array is created using the *createstringarray command. This should always be set to 1.
number_of_strings
Integer indicating the size (number of strings) in the string array created using *createstringarray. Each argument must be space separated.
Each string is required and is introduced as follows:
"find: t o l b"
t
0 - Do not find and include T-connected elements
1 - Find and include T-connected elements
o
0 - Do not find and include overlap-connected elements
1 - Find and include overlap-connected elements
l
0 - Do not find and include L-connected elements
1 - Find and include L-connected elements
b
0 - Do not find and include butt-connected elements
1 - Find and include butt-connected elements
"features: overlap_angle l_angle boundary_type"
overlap_angle
The maximum angle allowed between two components when categorizing as an overlap connection. The angle measured is the smallest angle between the two components.
l_angle
The maximum angle allowed between two components when categorizing as an l-connection. Must be greater than overlap_angle and less than 180. The angle measured is the smallest angle between the two components.
boundary_type
comp - Consider component boundaries when finding and categorizing connections
"output: single_node_elems elems nodes"
single_node_elems
0 - Do not return elements that have only a single node along the connection
1 - Return elements that have only a single node along the connection
elems
0 - Do not return element lists
1 - Return flat list of uncategorized elements
2 - Return lists of categorized elements
3 - Return lists of categorized and grouped elements
nodes
0 - Do not return node lists
1 - Return flat list of uncategorized nodes
2 - Return lists of categorized nodes
3 - Return lists of categorized and grouped nodes

Example

To find and output categorized and grouped t-connected and butt-connected elements, with an overlap angle of 5 degrees, an L angle of 175, and using component boundaries, from the displayed components:

*createmark comps 1 displayed
*createstringarray 3 "find: 1 0 0 1" "features: 5.0 175.0 comp" "output: 0 3 0"
set elem_lists [hm_getconnected2delems comps 1 1 3]

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

12.0.110