Extracts the midmesh of an input geometry.
Syntax
*midmesh_extract
entity_type mark_id string_array number_of_strings
Type
HyperMesh Tcl Modify Command
Description
longDescription
Inputs
-
entity_type
- The type of input geometry. Valid values are solids, surfs, comps and elems.
-
mark_id
- The ID of the mark of input entities. Valid values are 1 and 2.
-
string_array
- The ID of the string array that contains the additional optional input parameters. The
string array is created using the *createstringarray command. This should always be set
to 1.
- Note: All parameters are case insensitive, and order insensitive. All parameters are
optional, if not supplied, the mentioned defaults will be used.
- Valid parameters and their syntax are:
-
-
CombineNonManifoldEdgesDistance=<value>
- If two non-manifold/sharp edges are in proximity with another edge within the
distance given for this argument, they will be merged together at the
mid-location.
-
CombineNonManifoldEdgesFactor=<value>
- Triggers the same option as CombineNonManifoldEdgesDistance,
but the distance is expressed as a factor of MinimumSize.
- A value of 1.0 means the CombineNonManifoldEdgesDistance is
same as MinimumSize. A value of 0.5 means the
CombineNonManifoldEdgesDistance is half of
MinimumSize.
- Default 0.5, range [0.0, 1.0].
-
DefeatureOpeningsFactor=<value>
- Triggers the same option as DefeatureOpeningsWidth, but the
distance is expressed as a factor of MinimumSize.
- A value of 1.0 means the DefeatureOpeningsWidth is same as
MinimumSize. A value of 0.5 means the
DefeatureOpeningsWidth is half of
MinimumSize.
- Default 0.5, range [0.0, 1.0].
-
DefeatureOpeningsWidth=<value>
- If a hole/opening is of lesser width that the given value, it will be
closed.
-
DestinationComponent=<value>
- Midmesh - All output mesh goes to Midmesh component or to the component whose
name is specified in the DestinationComponentName argument.
This is the default.
- Midmesh.# - For each input geometry, the generated midmeshes are organized into
a new Midmesh.# component. # denotes a unique incremental number.
- Original - For each input geometry, the generated midmesh is organized back into
the input components.
- Original.# - For each input geometry, the generated midmeshes are organized into
new Orignal.# components.
- Current - All generated midmeshes go to the current component.
-
DestinationComponentName=<name>
- The prefix to be used for the new shell element components created for the
output mesh. Default is Midmesh
-
ExtractionSize=<value>
- The size at which the midmesh is extracted. Default 2.0.
-
FlattenConnections=<value>
- 0 - The default Y shaped connections are retained (default)
- 1 - The output will be flattened at the connections. Y shaped connections are
flattened to T shape. Stepped geometry (One side continuous surface, and opposite
side steps) will be captured as continuous surface there by deviating from
middle.
- 2 - The output will be flattened at the connections. Y shaped connections are
flattened to T shape. Stepped geometry (one side continuous surface, and opposite
side steps) will be captured as stepped, keeping the steps at the middle
always.
-
IgnoreFlatEdges=<value>
- 0 - No specific treatment done to remove flat bottom edges
- 1 - Flat bottom edges are not retained in the output
-
MinimumSize=<value>
- The value used for defeaturing the topology based on the factors
SupressProximityEdgesFactor, CombineNonManifoldEdgesFactor and
DefeatureOpeningsFactor. It is recommended to set this value the same as the
minimum allowable element length for your final target mesh. Default is
ExtractionSize.
-
SuppressProximityEdgesDistance=<value>
- If a manifold edge is in proximity with another edge within the distance given
for this argument, it will be suppressed. Sharp edges are not considered for this
operation.
-
SuppressProximityEdgesFactor=<value>
- Triggers the same option as SuppressProximityEdgesDistance,
but the distance is expressed as a factor of MinimumSize.
- A value of 1.0 means the SuppressProximityEdgesDistance is
same as MinimumSize. A value of 0.5 means the
SuppressProximityEdgesDistance is half of
MinimumSize.
- Default 0.5, range [0.0, 1.0].
-
TargetElementSize=<value>
- This value is used for fine tuning certain internal computations to go well with
the expectations according to the final target element size. It affects the
suppression of flat edges, and edges in proximity. Default is
ExtractionSize.
-
number_of_strings
- Integer indicating the size (number of strings) in the string array created using
*createstringarray.
Examples
To extract the midmesh of all solids present in the model with element size as 2.0 with
SuppressProximityEdgesFactor and CombineNonManifoldEdgesFactor as 0.5:
*createmark solids 1 all
*createstringarray 3 {ElementSize: 2.0} {SuppressProximityEdgesFactor: 0.5} {CombineNonManifoldEdgesFactor: 0.5}
*midmesh_extract solids 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
}