Returns the thickness of the specified component, element or property.
    Syntax
      
      hm_getthickness
        entity_type entity_id ?ply_id? 
    
    Type
      
      HyperMesh Tcl Query Command
    
    Description
      
      This command returns the thickness value for an entity.
    
    Inputs
      
      
        
          - entity_type
- The type of entity to query. Valid values are comps, elems and props. 
- For an entity_type of components the following applies: 
- If the component has a property directly assigned, the thickness of the property is
            returned. 
- If no property is assigned to the component, nothing is returned. 
- For an entity_type of elements the following applies: 
- If the element has a property assigned, the thickness of the property is returned. 
- If no property is assigned directly to the element, use the component rules as
            above.
- entity_id
- The ID of the entity to query.
- ply_id
- Optional argument that allows for additional control for querying the thickness of
            individual plies of composites. 
- Used as follows for metallic properties: If not specified, returns the thickness. 
- If specified as 1, returns the thickness as (a). 
- Any other value will return an error. 
- Used as follows for composite properties: 
- If not specified, returns the total thickness (sum of all ply thicknesses). 
- If a valid ply is specified, returns the thickness of that ply. 
- Any other value will return an error.
Examples
      
      Get the thickness value of component 11 which has a PSHELL property with thickness of
        0.25:
hm_getthickness comps 11
	0.25
hm_getthickness comps 11 1
	0.25
hm_getthickness comps 11 2
	2 is not a valid ply ID.
Get the thickness value of component 15 which has a PCOMP property with 4 plys (thickness
        values of 0.1, 0.25, 0.25, 0.1, total of 0.7):
hm_getthickness comps 15
	0.7
hm_getthickness comps 15 1
	0.1
hm_getthickness comps 15 2
	0.25
hm_getthickness comps 15 3
	0.25
hm_getthickness comps 15 4
	0.1
hm_getthickness comps 15 5
	5 is not a valid ply ID.
Get the thickness value of element 20 which has a PSHELL property with thickness of
        0.25:
hm_getthickness elems 20
	0.25
Get the thickness value of element 20 which does not have a property assigned but belongs
        to a component that has a PSHELL property with thickness of
        0.25:
hm_getthickness elems 20
	0.25
Get the thickness value of element 20 which does not have a property assigned and belongs
        to a component that does not have a property
        assigned:
hm_getthickness elems 20
	""
Errors
      
      Incorrect usage results in a 
Tcl error. To detect
        errors, you can use the 
catch
        command:
if { [ catch {command_name...} ] } {
   # Handle error
}