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API, Reference Guides
Overview of external readers and the Altair Binary Format, the generic ASCII reader, running applications in batch mode, using Tcl/Tk commands, translators, and result math.
Tcl/Tk Commands
The application's scripting interface is a set of Tcl/Tk commands that follow a simple and consistent syntax.
Tcl/Tk Commands
Tcl/Tk classes for the following Altair HyperWorks applications.
HyperView
poIModel Class
poIModel GetNumberOfChildren
Gets the number of child components.

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API, Reference Guides
Overview of external readers and the Altair Binary Format, the generic ASCII reader, running applications in batch mode, using Tcl/Tk commands, translators, and result math.
- Extensions
  Extensions are programs integrated with the application to enhance or extend the user experience.
- External Readers and Altair Binary Format
  Altair Binary Format (ABF) is the standard binary format read by the program. A library called abflib allows you to create files in ABF.
- Generic ASCII Reader
  A generic ASCII reader is now available which allows you to bring custom results directly into HyperView. The Altair ASCII format is useful for reading the results of any in-house or propriety codes which are saved in a generic format.
- Batch Mode
  Batch mode allows you perform a series of operations outside the program interface.
- External Resources
  External resources can be registered in preference files, session files, or Templex files. If an external resource is registered in a program session, it is automatically registered in the session file when the session is saved.
- Python API
  The Python API documentation for HyperMesh applications.
- Tcl/Tk Commands
  The application's scripting interface is a set of Tcl/Tk commands that follow a simple and consistent syntax.
  - Program with APIs for Beginners
    APIs can be used to perform various actions in an application. For example, the AddPage API can be used to add a page within the project.
  - Object Hierarchy
    Overview of object hierarchy for HyperView, HyperGraph, HyperMesh, MotionView, MediaView and TextView.
  - Tcl/Tk Classes
    Links to the introductory pages for the Tcl/Tk commands that can be used in HyperView, MotionView, HyperGraph, HyperGraph 3D, TextView and MediaView.
  - Script Use Cases
    Examples of script uses cases.
  - Tcl/Tk Example
    Learn more about Tcl/Tk with this basic example.
  - Program with Tcl/Tk Command Tutorials
    Learn more about programming with Tcl/Tk commands with this tutorial.
  - Tcl/Tk Commands
    Tcl/Tk classes for the following Altair HyperWorks applications.
    - Framework
    - MotionView
    - HyperView
      - Hotspot Finder API Structure
      - HyperView - MultiCore APIs
      - poI3DViewCtrl Class
      - poIAdvancedQuery Class
      - poIAssembly Class
      - poIBestView Class
      - poICFD Class
      - poICFD_rake Class
      - poICollisionCtrl Class
      - poICollisionSet Class
      - poIComplexCtrl Class
      - poIComponent Class
      - poIContourCtrl Class
      - poICrossSectionPlanar Class
      - poICrossSectionSet Class
      - poIExplosion Class
      - poIFBDCtrl Class
      - poIFLDCtrl Class
      - poIGraphicMaterial Class
      - poIImagePlaneCtrl Class
      - poIImagePlane Class
      - poIIsoValueCtrl Class
      - poILayerFilter Class
      - poILegend Class
      - poIMeasure Class
      - poIModel Class
        poIModel AddAssembly
        Adds a new assembly.
        poIModel AddCrossSection
        Adds a section of the specified type to the current client.
        poIModel AddExplosion
        Adds a new explosion to the current model.
        poIModel AddPart
        Creates a part from the given part reference parented by the given assembly locator string.
        poIModel AddSelectionSet
        Creates a new selection set on the current model.
        poIModel AddTrackingSystem
        Creates a tracking system and assigns a name.
        poIModel AddUserDefinedSystem
        Adds a new coordinate system to the current model.
        poIModel ApplyDefaults
        Sets component material to default values. Calling this command on an assembly has no affect.
        poIModel ApplyStyleTo
        Applies the style of the current model to another model on the current page, or on a different page in the session.
        poIModel ChangeSelectionSetType
        Changes the type of the current selection set with respect to the selection set entity binding.
        poIModel DefineAssembly
        Defines an assembly in a model.
        poIModel GetActiveExplosion
        Gets the ID of the active explosion.
        poIModel GetActiveTrackingSystem
        Gets the active tracking system ID.
        poIModel GetAssemblyHandle
        Gets an assembly handle for the given assembly locator string.
        poIModel GetAssemblyID
        Gets the parent assembly's ID.
        poIModel GetBoundingBox
        Returns the bounding box coordinates of the model.
        poIModel GetChildrenList
        Gets the number of child components. For an assembly, only the child parts and assemblies are returned, the IDs of child systems are not returned.
        poIModel GetColor
        Gets the component color index. If this component is an assembly, the returned color will always be the first one listed in the color table.
        poIModel GetColorMode
        Gets the current color mode for the model.
        poIModel GetColorModeList
        Gets the list of available color modes.
        poIModel GetComponentHandle
        Gets a handle to the given component by ID.
        poIModel GetComponentID
        Gets the component ID.
        poIModel GetCrossSectionHandle
        Gets a handle to the given cross section by ID.
        poIModel GetCrossSectionList
        Gets a list of cross sections IDs (both planar and set types).
        poIModel GetCrossSectionPlanarList
        Gets a list of cross sections IDs (planar type).
        poIModel GetCrossSectionSetList
        Gets a list of cross sections IDs (set type).
        poIModel GetDisplayMode
        Gets the component display option setting. If this component is an assembly, true will indicate that one or more child parts have the display mode set.
        poIModel GetDisplayModeList
        Gets the list of component display modes.
        poIModel GetEntityCount
        Gets the number of entities of a particular pool type and optionally, the pool label.
        poIModel GetEntityInfo
        Returns the property information for a given entity.
        poIModel GetEntityList
        Gets the list of entity IDs in a given pool.
        poIModel GetExplosionList
        Gets a list of explosion IDs.
        poIModel GetFailureEntityCountList
        Gets the failed element counts for a given element configuration and simulation.
        poIModel GetFailureTimeList
        Gets the failure time list with information of element ID, time frame, and time value.
        poIModel GetFileName
        Gets the model file name.
        poIModel GetGlobalPropertyList
        Gets the global property list.
        poIModel GetID
        Gets the model ID.
        poIModel GetLabel
        Gets the label ID.
        poIModel GetMaskedElements
        Populates the given set with the currently masked elements.
        poIModel GetMaterial
        Gets the component material ID (zero if none assigned). If this is an assembly, -1 is always returned.
        poIModel GetMeshMode
        Gets the component's mesh mode. If this is an assembly, ALL child parts must be set to the same mesh mode, otherwise the returned mode will be "none".
        poIModel GetNumberOfChildren
        Gets the number of child components.
        poIModel GetNumberOfComponents
        Gets the number of components in this model.
        poIModel GetNumberOfElements
        Gets the number of elements in this model.
        poIModel GetNumberOfNodes
        Gets the number of nodes in this model.
        poIModel GetNumberOfParts
        Gets the number of parts in this model.
        poIModel GetNumberOfSystems
        Gets the number of systems in the model.
        poIModel GetPartAssemblyHandle
        Gets a handle to the given part assembly by ID.
        poIModel GetPartAssemblyList
        Gets the list of part assembly IDs in the model.
        poIModel GetPartHandle
        Gets a handle to the given part by ID.
        poIModel GetPartSetHandle
        Gets a handle to the given part set by ID.
        poIModel GetPartSetList
        Gets the list of part set IDs in the model.
        poIModel GetPolygonMode
        Gets the component's polygon mode. If this is an assembly, ALL child parts must have the same polygon mode set, otherwise the returned mode will be "none".
        poIModel GetPoolList
        Gets the list of pools for the particular type in this model.
        poIModel GetPoolTypeList
        Gets the type of pools available in this model.
        poIModel GetQueryCtrlHandle
        Gets a handle to the query control object.
        poIModel GetReaderName
        Gets the model reader name.
        poIModel GetResultCtrlHandle
        Gets a handle to the result control object.
        poIModel GetReaderPropertyList
        Returns the reader options which were used to read the model data.
        poIModel GetResultFileName
        Gets the attached result file name.
        poIModel GetResultList
        Gets the list of loaded result IDs.
        poIModel GetResultReaderName
        Gets the result reader name.
        poIModel GetResultReaderPropertyList
        Returns the reader options which were used to read the result data.
        poIModel GetSelectionSetHandle
        Retrieves the handle for a particular selection set.
        poIModel GetSelectionSetList
        This command retrieves a list of all selection set IDs on the current model.
        poIModel GetStyleList
        Gets a list of styles that can be applied to other models.
        poIModel GetSyncBlockID
        Gets the model sync block ID.
        poIModel GetSystemGroupList
        Gets the list of coordinate system groups (analogous to the HyperMesh system collectors).
        poIModel GetSystemHandle
        Gets the coordinate system handle by ID.
        poIModel GetSystemList
        Gets a list of coordinate systems for the given group ID.
        poIModel GetTracingCtrlHandle
        Gets the tracing control.
        poIModel GetTracingMode
        Gets the component's tracing mode. If this is an assembly mode, "ff" is always returned.
        poIModel GetTrackingSystemDisplayMode
        Gets the tracking system's drawing mode.
        poIModel GetTrackingSystemHandle
        Gets a handle to the given tracking system by ID.
        poIModel GetTrackingSystemList
        Gets a list of tracking system IDs.
        poIModel GetTranslation
        Gets the translation vector in the global coordinate system. If this component is an assembly, a zero translation will always be returned.
        poIModel GetType
        Gets the component's type string.
        poIModel GetUserDefinedSystemHandle
        Gets a handle for the user-defined system as specified by the ID string.
        poIModel GetUserDefinedSystemList
        Gets a list containing all of the user-defined systems present in the current model.
        poIModel GetUserDefinedSystemTypeList
        Gets a list containing all of the possible types of user-defined systems which can be created.
        poIModel GetVisibility
        Gets the model's visibility state.
        poIModel GetVisibleNodesCoordinatesList
        Gets the coordinates of the currently visible nodes for the part (part_locator). If for example there is an active 0 width cross section, only the nodes on the cut will be returned (the same will be true for ISO sections). Node positions will be listed only once.
        poIModel GetZViewableCount
        Returns the number of entities in the selection set which are visible in the current view orientation.
        poIModel Mask
        Masks the contents of a selection set.
        poIModel MaskAll
        Masks all parts or systems.
        poIModel MaskOffScreen
        Masks off screen elements.
        poIModel RemoveAssembly
        Removes an assembly from the model.
        poIModel RemoveExplosion
        Removes the given explosion by ID.
        poIModel RemovePart
        Removes the given part reference from its parent.
        poIModel RemoveResult
        Removes a result from the model.
        poIModel RemoveSelectionSet
        Removes a selection set on the current model.
        poIModel RemoveTrackingSystem
        Removes the given tracking system by ID.
        poIModel RemoveUserDefinedSystem
        Removes a user-defined system from the current model.
        poIModel ReverseMask
        Reverses the visibility on elements and systems.
        poIModel SetActiveExplosion
        Sets the active explosion by ID.
        poIModel SetActiveTrackingSystem
        Sets the active tracking system by ID.
        poIModel SetApproximationError
        Sets the model's approximation error.
        poIModel SetAssemblyID
        Sets the parent to the assembly identified by assy_id. This will always fail. You cannot change the model's parent.
        poIModel SetAttribute
        Enables or disables the selection set identified by the set_id.
        poIModel SetColor
        Sets the component's color index. This command will be invalid if it is called on a component that is an assembly, doing so will have no affect, and a warning will be returned.
        poIModel SetColorMode
        Sets the current color mode for the model.
        poIModel SetDisplayMode
        Sets the component display option setting. If this component is an assembly, all the child parts will be set to this state.
        poIModel SetLabel
        Sets the model label.
        poIModel SetMaterial
        Sets the component material index. Calling this command on an assembly has no affect.
        poIModel SetMeshMode
        Sets the component's mesh mode. If this is an assembly, ALL child parts are set to the specified mesh mode.
        poIModel SetPolygonMode
        Sets the component's polygon mode. If this is an assembly, ALL child parts are set to the specified polygon mode.
        poIModel SetResult
        Attaches the given result file to the model.
        poIModel SetSync
        Sets the model sync value.
        poIModel SetTracingMode
        Sets the component's tracing mode. This command has no affect on an assembly.
        poIModel SetTrackingSystemDisplayMode
        Sets the tracking system drawing mode.
        poIModel SetTranslation
        Sets the translation vector in the global coordinate system. If this component is an assembly, a zero translation will always be returned. Translating/exploding the root level (model) assembly is an invalid operation. The translation will be put into a TRANSLATION mode explosion.
        poIModel SetVisibility
        Sets the model's visibility state (doesn't affect part/element visibility).
        poIModel UnMask
        Unmasks the contents of a selection set.
        poIModel UnMaskAll
        Unmasks all elements.
        poIModel UnMaskOnScreen
        Unmasks screen elements.
      - poINote Class
      - poIPart Class
      - poIPartAssembly Class
      - poIPartSet Class
      - poIPost Class
      - poIPostManager Class
      - poIQueryCtrl Class
      - poIQueryDistanceRule Class
      - poIQueryExpressionRule Class
      - poIQueryExtremeRule Class
      - poIQueryIgnoreElemTypeRule Class
      - poIQueryIterator Class
      - poIQueryRule Class
      - poIQuerySetRule Class
      - poIRenderOptions Class
      - poIResultCtrl Class
      - poIResultMathCtrl Class
      - poIScalarDefine Class
      - poIScaleCtrl Class
      - poISCL Class
      - poISection Class
      - poISelectionSet Class
      - poIStressLinearizationCtrl Class
      - poISubcase Class
      - poISweepCtrl Class
      - poISymmetry Class
      - poISystem Class
      - poISystemCtrl Class
      - poITensorCtrl Class
      - poITensorDefine Class
      - poITextAttribute Class
      - poITracingCtrl Class
      - poITrackingSystem Class
      - poIVectorCtrl Class
      - poIVectorDefine Class
    - HyperGraph 2D
    - HyperGraph 3D
    - MediaView
    - TextView
    - HgTrans
    - TableView
    - Postquery Commands
    - Context Commands
    - Framework Commands
- Translators
  Translators are utilities that are run from the command line of the operating system to convert various types of files into different formats.
- Result Math
  XML commands in the Result Math Module.
- HWC Console
  Record playback workflows in the application.
- HyperMesh Report
- Task Manager
  Use the Task Manager to load an XML file that defines tasks and their attributes.
- HyperMesh
- MotionView
- Templex and Math Reference Guide
- Script and Model Library
  The Script and Model Library is a database of freely accessible scripts and models posted by users and Altair engineers.

poIModel GetNumberOfChildren

Gets the number of child components.

Syntax

poIModel_handle GetNumberOfChildren

Application

HyperView Tcl Query

Description

This command returns the number of child components.

Errors

None.