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Version 2020
New Features in
Opera
Version 2020
Dassault Systèmes UK Ltd
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Kidlington, Oxfordshire, OX5 1LH, UK
December 2019
2 : Legal Notices
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Contents
Legal Notices 2
Contents 11
Chapter 1 Introduction 14
Opera 2020 14
Opera-3d/Pre-Processor - End of Life 14
About this Document 15
Chapter 2 Opera 2020 Major Features 16
New Opera-2d 16
Old Model and Solution Files 16
COMI commands 17
Upcoming Features 18
Chapter 3 Opera-2d Graphical User Interface 19
Overview 19
Opera-2d Tabbed Menu Interface 22
Canvas 23
Building Geometry 23
Modifying Geometry 24
Dimensions 27
Post-Processing 28
Right Hand Side (RHS) Panel 30
Left Hand Side (LHS) Panel 31
Overview 31
Selection Options 31
View Options 32
Select Items Using 33
Modify Items 33
View Settings Menu 34
Keyboard Actions Menu 35
Python Console / Message Pane 36
Version 2020, December 2019 New Features in Opera12
Python Console 36
Message Pane 37
Chapter 4 Python and Opera-2d 38
Introduction 38
Python Functionality Provided with Opera-2d 38
Export to Python 40
Writing Python Scripts 41
Integrated Development Environment (IDE) 41
Opera Python Example Scripts 43
Accessing Model Components 43
Build a Rectangle and Assign Material Property 44
Perform Boolean Operation 45
Assign Material Properties 45
Change Analysis Properties 45
Post-Processing Methods - Retrieve Field at Point 46
Post-Processing - Plot Line on Graph 46
Canvas - View Commands 47
Chapter 5 Opera 2020 Minor Features 48
Opera Manager 48
SIMULIA CST Licensing 48
POWER'BY 48
Command Language 49
FACT function 49
Intel Python 50
ACIS 2019 (R29) 51
Interoperability 51
Mesh Generator 51
Opera-3d/Modeller 52
CAD Import and Export, including Linux 52
Shortcuts 52
SAVE Command 52
Opera-3d/Post-Processor 53
AXESVIEW command 53
Chapter 6 3d Pre-Processor: End of Life 54
Opera-3d/Pre-Processor 54
Chapter 7 System Notes 55
New Features in Opera Version 2020, December 201913
Supported Operating Systems for Opera 2020 55
Third Party Libraries 57
Intel Python distribution 57
Licensing 58
Opera License Management Suite (using LM-X) 58
SIMULIA CST License Wizard (using FlexNet) 58
Version 2020, December 2019 New Features in OperaChapter 1
Introduction
Opera 2020
Opera 2020 is a major release which introduces significant new features into Opera, including:
l A complete replacement of the Opera-2d modelling and analysis modules.
l New licensing options to allow Opera to be run from new license bundles.
Other minor changes have been made throughout the software to enhance its functionality and reli-
ability. Some of these are also included in this document.
Opera-3d/Pre-Processor - End of Life
Opera 2020 will be the last version that is supplied with the Opera-3d/Pre-Processor, see "3d Pre-Pro-
cessor: End of Life" on page 54
Version 2020, December 2019 New Features in Opera15 Chapter 1 Introduction: About this Document
About this Document
This New Features document high-lights the new facilities that are available in the Opera software at
version 20.
l "Opera 2020 Major Features" on page 16 describes the New Opera-2d.
l "Opera 2020 Minor Features" on page 48 describes other changes to the User Interface,
Opera Manager and Opera-3d.
l "System Notes" on page 55 specifies the supported operating systems and the version num-
bers of 3rd-party libraries used to build Opera as well as changes to the licensing system.
Please read the corresponding sections in the Reference Manuals and see the examples in the
User Guides for more information on these new features.
New Features in Opera Version 2020, December 2019Chapter 2
Opera 2020 Major Features
New Opera-2d
The Opera-2d/Pre & Post-Processor has been replaced in Opera 2020 with a new GUI that improves
the modelling and analysis process, while maintaining the accuracy and speed of the existing solvers.
In addition, Opera-2d now has full access from the Python language to make scripting far simpler.
Full details of the new application are included in the updated Opera-2d Reference Manual and
in the following chapters.
Old Model and Solution Files
Import
Opera-2d model files (.op2) and solution files (.st ,.ac,.tr,.rm,.lm,.dm,.sp,.sa,.th ,.thtr,.vl) can
be imported into new Opera-2d. These must be Opera-2d version 19/2019 files. Earlier version files
can be read into Opera-2d version 19/2019 and written out in order to bring them up to the correct
version to be imported into new Opera-2d.
When importing solution files, the solution and any solution tables will not be included in the import.
Solutions rely on the mesh nodes and elements, as the solution data is a list of solution potentials etc
on the nodes/elements. During the import of an old model the regions are re-created as new regions
which do not necessarily have the same edge order and mesh element number, which means that
when the imported model is re-meshed the mesh is likely to be slightly different from that which was
created in the model previously and so the previous solution data cannot be mapped directly onto the
new mesh.
Export
Models created in Opera-2d 2020 can be exported into the old model format (.op2) so that they can
be loaded into Opera-2d version 19/2019 and imported into the Opera-3d Modeller, as part of geo-
metry creation.
Version 2020, December 2019 New Features in Opera17 Chapter 2 Opera 2020 Major Features:
The new geometric capabilities of Opera-2d 2020 does mean that there are some new features
which can not be supported by the older model format. This includes models which contain "holes".
Previously a hole in the geometry would have to be constructed with a wrapped around regions
where two edges are overlapped to form a join between the inside and outside of the hole. In new
Opera-2d a hole can be created using a boolean subtraction operation which does not create a com-
patible region topology.
When exporting a model to the old model format, warning messages will be issued if the model topo-
logy cannot be supported by the previous format.
As new features are added to Opera-2d, the older model format will not be updated and it is advis-
able to convert old models that are still required to the new format.
COMI commands
Support for the parsing of COMI command scripts has been included in new Opera-2d to allow users
to run existing COMI files in new Opera-2d. This has been done for commands where it has been feas-
ible to do so. However, where a command was only relevant for the old display structure or com-
mand structure or where there is a newer method that deprecates a function, the commands will not
be converted. The following is a list of the commands that have not been included in the parser in this
release.
Command Reason for not being supported
ANIMATION Deprecated functionality
APPEND Deprecated functionality
CHECK Deprecated functionality
COMOUTPUT Deprecated functionality - replaced by Python output
DIMENSION UI only functionality
DUMP Deprecated functionality
GRAPH Deprecated functionality
GUIOPTIONS Only relevant to previous interface
HEATTRANSFER UI only functionality
HELP UI only functionality
LIST UI only functionality
PAN UI only functionality
PLOT Deprecated functionality
PRINT UI only functionality
RESIZE UI only functionality
SECTION UI only functionality
New Features in Opera Version 2020, December 2019Chapter 2 Opera 2020 Major Features: 18
SPLIT UI only functionality
TEST Deprecated functionality
TITLE Deprecated functionality
UNDO UI only functionality
WINDING UI only functionality
ZOOM UI only functionality
Additionally some command parameters have not been included where they are deprecated or can
not be included in the parser system.
A new Opera-2d COMI Reference Manual is included in this release and is available from the
Opera Manager Help menu. This covers the list of commands which are included in the Python
parser. In order that compatibility with existing command scripts can be maintained as much as pos-
sible, command parameters have been retained in the same order. The parameters which are not
supported by the Python parser are marked as "Ignored".
The majority of COMI commands and command script structures have been included in the parser, in
order that existing scripts can be used with new Opera-2d with the minimum of updating. However
new features in Opera-2d are not available from COMI and so it is advisable to switch to using the
Python API to new Opera-2d.
Upcoming Features
There are a number of features that are in the process of being implemented for the new version of
Opera-2d. These will be added in upcoming feature releases as they are developed. As they move
from the upcoming list to the implemented list they will be mentioned in the list of new features for
new Opera-2d and removed from this list.
The list of upcoming features includes:
l Charged Particle Analysis:
l Graphs of intersections of tracks with lines either defined in the post-processing stage
or as geometry edges
l Partial Tables of solution values
l Solution restarts
l Incremental permeability restarts
l Machines Environment
Version 2020, December 2019 New Features in OperaChapter 3 Opera-2d Graphical User Interface Overview Opera-2d is an interactive program for preparing data and processing results from the Opera-2d ana- lysis programs. The pre-processing commands are used to create and edit two dimensional finite element models, define material characteristics for nonlinear magnetic, dielectric, thermal or stress components, dis- play pictures of the models and the mesh and output data files in the formats accepted by the ana- lysis programs. The post-processing commands allow many field components, or expressions of field components to be viewed at points, along lines or over the cross-section of the model. Components can be integ- rated in one or two dimensions and particle trajectories can be calculated in three dimensions. The Graphical User Interface consists of a number of different components as shown in the images below. The description of each of these components is presented in the following sections. Version 2020, December 2019 New Features in Opera
20 Chapter 3 Opera-2d Graphical User Interface:
Figure 3.1 Components of the Graphical User Interface
New Features in Opera Version 2020, December 2019Chapter 3 Opera-2d Graphical User Interface: 21
Figure 3.2 Components of the Graphical User Interface - continued
The View Settings menu and the Right Hand Side panel are collapsible and they can be opened
and closed using the arrow icons.
The Graphical User Interface provides two different color schemes:
l light mode
l dark mode
The color scheme can be changed from the context menu available by right clicking in the Toolbar.
Figure 3.3 Light color scheme Figure 3.4 Dark color scheme
The font size of the text in the Graphical User Interface can be adjusted with CTRL + and
CTRL - keys.
Version 2020, December 2019 New Features in Opera22 Chapter 3 Opera-2d Graphical User Interface: Opera-2d Tabbed Menu Interface
Opera-2d Tabbed Menu Interface
The Opera-2d Tabbed Menu Interface has 4 tabs of commands:
• Work: contains commands for file reading and writing, global options and units.
• Modelling: contains commands for defining and manipulating bodies.
• Analysis: contains commands to generate the mesh and define analysis specific data.
• Post-Processing: contains commands for visualizing the solution and calculating further res-
ults.
Figure 3.5 Tabbed menu interface - Work tab
In addition to these, there is a second row of tabs that switch between different views:
l Canvas 2d: drawing interface for model building and definition
l Circuits: interface for defining circuits connected to the Finite Element model (only available
for certain types of solutions)
l BH Editor: interface for defining and visualizing material characteristics
l Winding Tool: interface for defining and visualizing winding layouts for electrical machines
l Graphing: interface for 2d plotting of results
The toolbuttons in the first row of tabs are only relevant for the Canvas 2d view.
Figure 3.6 Tabbed menu interface - Modelling tab and second layer of tabs
New Features in Opera Version 2020, December 2019Chapter 3 Opera-2d Graphical User Interface: Canvas 23
Canvas
The Canvas provides facilities for building and modifying geometry, as well as for selecting geo-
metric items.
Building Geometry
A number of different controllers are available, which allow the definition of geometrical entities.
Each of the controllers is defined by a series of points and some allow various options in the way in
which the geometric shape is defined.
Controller Definition
A polyline is defined by a series of vertices that are connected with straight
lines or arcs.
Polyline On creating a new polyline, the default type of line is straight.
Switching between straight lines and arcs is done using the keyboard, as indic-
ated in the "Keyboard Actions Menu" on page 35 (A for arcs and L for straight
lines).
Arcs can be defined in one of 2 different ways:
a. using a center point and an angle span
b. using a radius and an angle span
The angle to the previous edge can be modified.
The arc can be tangential or perpendicular to the previous edge.
The direction of the arc can be toggled.
Polylines can be closed by snapping to the first corner or using the automated
option to close an open polyline.
A rectangle can be defined in 2 different ways:
a. by two opposite vertices
Rectangle b. by two consecutive vertices and a width
A circle is defined in one of 2 different ways:
a. by a center vertex and radius
Circle b. by a center vertex and diameter
Version 2020, December 2019 New Features in Opera24 Chapter 3 Opera-2d Graphical User Interface: Canvas
Controller Definition
A circular sector is defined by:
l center vertex
Circular Sector l first vertex on the radius
l second vertex on the radius
An annular sector is defined by:
l center vertex
Annular Sector l vertex on the first radius
l vertex on the second radius
A regular polygon is defined by:
l center vertex
Regular Poly- l vertex at one of the polygon corners
gon
Note: "Keyboard Actions Menu" on page 35 shows context-sensitive options for changing the defin-
ition mode.
Once a controller is activated, the definition of the individual vertices can be done by left clicking on
the canvas, or by entering the numerical coordinates.
To enter the numerical coordinates for a vertex, use the TAB key to enter the coordinate for the first
axis (X or R) and then using the TAB or RETURN keys move to define the coordinates for the
second axis (Y or Z). To finalize the definition of the vertex, use the RETURN key.
Once the definition of the geometric entity is finished, the user can exit the controller for the geo-
metry definition using the ESCAPE key.
Note: After entering one of the coordinates, the user can ‘lock’ the coordinate that has just been
defined using the TAB key. This operation does not create the entity. Only the RETURN key creates
the entity. The user can ‘unlock’ any of the coordinates using the BACKSPACE key.
Structure of Geometric Entities
From the point of view of a model structure, bodies contain regions, regions are made up of edges
and edges are defined by vertices. Primitives always contain one single region at the point when they
are created. After performing boolean operations, one body can contain multiple regions.
Modifying Geometry
A number of different operations are allowed to modify bodies that have already been created. The
operation type must be selected first. Then a body or several bodies can be selected to apply a modi-
fication.
New Features in Opera Version 2020, December 2019Chapter 3 Opera-2d Graphical User Interface: Canvas 25
Boolean Operations
Boolean operations are performed on two or more bodies. The order in which bodies are selected for
a Boolean operation is important. The steps for defining a Boolean operation are:
l Enter the Boolean definition mode, by clicking the Boolean toolbutton
l Using the keys listed in the Keyboard Actions menu, select the type of Boolean operation:
l R – toggle between regular and non-regular union
l S – subtraction
l T – trim
l C – cutaway
l I – intersection
l Select the first body from the LHS panel or from the canvas
l Confirm the selection of the first body using the RETURN key
l Select the other bodies from the LHS panel or from the canvas
Note: In order to return to the definition of the first body selected in the Boolean operation, use
the BACKSPACE key
l Perform the Boolean operation using the RETURN key
l Exit the Boolean definition mode using the ESCAPE key
The outcome of a Boolean operation is:
l Regular Union -> one single body is created with the name and properties of the first body.
The single body contains one single region.
l Non-regular Union -> one single body with the name of the first body and multiple
regions, each maintaining their original properties.
l Subtraction -> the first selected body is kept but its geometry is modified by removing the
intersections with the other bodies. The other bodies are removed.
l Trim -> same as Subtraction, but the other bodies are not removed.
l Cutaway -> the geometry of the first selected body is removed from all the other bodies
(opposite to Trim). The first body remains unchanged.
l Intersection -> one single body is created with the name and properties of the first body
and the geometry given by the intersection between all of the selected bodies.
Chamfer and Blend
The Chamfer or Blend operation adds a straight or curved edge, respectively, at the intersection
of two body edges.
The operation works by selecting the Chamfer or Blend toolbutton , followed by clicking on
the node which sits at the intersection of two edges.
The mode of operation can be toggled between chamfering or blending by using the key displayed in
the Keyboard Actions menu.
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For both modes, the user needs to provide the length along both edges that will be removed. By
providing these as independent values, chamfers and blends at any angle can be achieved.
To apply the chamfer or blend, left-click or press the RETURN key.
Note: Nodes that are being shared between multiple bodies cannot be used for chamfering or blend-
ing.
Copy and Replicate
The Copy functionality allows one or multiple bodies to be copied. Only bodies can be copied and the
new entities that are being created by the copy operation are independent from the original body or
bodies. The different ways in which bodies can be copied can be selected using the keys specified in
the Keyboard Actions menu.
The available options are:
l copy along the X-axis with a spacing and a number of copies
l copy along the Y-axis with a spacing and a number of copies
l mirror copy against an edge
Note: The edge used for mirror needs to go through the origin or otherwise be a construction
line
l mirror copy around an angle; the value for the angle can be defined using the TAB key
l rotated copies around a center, with a number of copies and angular span between copies
Note: Multiple types of copy can be combined at the same time, for example copy along the X-axis
and the Y-axis or copy around the origin and mirror against an angle.
The Replicate functionality allows one or multiple bodies to be replicated. The newly created entit-
ies are linked to the original body / bodies and their regions share the same properties.
All of the options that are available for the Copy command are also available for the Replicate com-
mand. The only restriction is for rotated replications: in this case, the center of rotation can only be
the origin (0, 0).
Transform
The transform operation allows the modification of existing bodies. The options available for trans-
formation can be toggled using the keys specified in the Keyboard Actions menu. The available
options are:
l Scale a body / bodies in both axes using a scaling factor
l Move the body / bodies in the plane
Note: The move can be specified as a set of absolute coordinates or as a translation
l Rotate the body / bodies around a center with a specific angle
l Flip the body / bodies in the X or Y axis
l Mirror the body / bodies in an edge
Note: The edge used for mirror needs to go through the origin or otherwise be a construction
line
New Features in Opera Version 2020, December 2019Chapter 3 Opera-2d Graphical User Interface: Canvas 27
Note: The origin of these transformations can be changed using the O key (as specified in the Key-
board Actions menu)
Region Ordering
Before creating the finite element mesh, all of the regions that define the model space will auto-
matically be 'flattened'. As part of this process, regions that occupy parts of the same canvas space
will need to be prioritised, so that at every point in the model space only one set of region properties
is retained.
Therefore, the ordering of regions that overlap or overlay each other is important. By default, the
ordering of these regions follows the order in which the regions (and the bodies to which they belong)
are created. Hence, the latest region that has been created will have the highest ordering level.
The layering order of a body can be modified by the user, by right clicking on the body and selecting
one of the options:
l Bring forward
l Send backward
l Bring to front
l Send to back
The order of the regions on the canvas is visible through the shading, colour and outline of regions.
When a body lies completely underneath another body, the software will issue a warning message at
the point of flattening and meshing, reporting that one or more regions have been omitted from the
meshed model. This can be avoided by bringing forward the body that contains the smaller region, so
that it lies above the larger body.
[Warning] MeshCreation Hidden regions have been omitted from mesh
Groups
Bodies can be grouped in order to facilitate operations on multiple bodies. A group behaves like any
other body and can be transformed, copied and replicated. Groups can also be used in Boolean oper-
ations.
A group can be destroyed using the Ungroup option and the component bodies are made inde-
pendent.
Dimensions
The Dimensions Tool can be used to retrieve the position of geometric entities, as well as
measuring distances, arcs and angles.
Users can select Vertices and Edges and the following output will be provided based on the selec-
tion:
Version 2020, December 2019 New Features in Opera28 Chapter 3 Opera-2d Graphical User Interface: Canvas
l 1 vertex selected
l coordinates in XY and Rθ
l 2 vertices selected
l coordinates of the two vertices in XY and Rθ
l angle between vertices at origin
l dimensions of equivalent edge in dXdY and Rθ
l 3 non-collinear vertices selected
l coordinates of the three vertices in XY and Rθ
l center of calculated circle XY and Rθ
l equivalent arc dX, dY, radius, span, length
l 1 vertex and 1 edge selected
l coordinates of vertex in XY and Rθ
l start and end coordinates of the edge
l edge lengths
l angle between edges
l distance between vertex and edge
l 2 edges selected
l start and end coordinates for the two edges
l edge length
l intersection point between the edges or distance between edges, if they are parallel
l 1 region selected
l number of vertices
l number of edges
l area
Post-Processing
The Post-Processing interface provides capabilities for presenting calculated results from the finite
element solution and for performing further calculations using the existing solution fields.
Post-processing items
In order to facilitate the post-processing of results, new geometric entities, called post-processing
bodies, can be created once a solution exists. These bodies will not change the solution already cal-
culated and they are differentiated from other bodies by their colour.
New Features in Opera Version 2020, December 2019Chapter 3 Opera-2d Graphical User Interface: Canvas 29
Figure 3.7 Post-processing body
Version 2020, December 2019 New Features in Opera30 Chapter 3 Opera-2d Graphical User Interface: Right Hand Side (RHS) Panel
Right Hand Side (RHS) Panel
The Right Hand Side (RHS) panel is used to define the properties of selected model components.
It also allows the definition of model-wide settings and of the analysis setup.
The panel contains three different tabs:
l Selection: is a context-sensitive tab and contains the properties for one or more entities
selected from the Left Hand Side (LHS) panel or from the canvas
l Model: contains model-dependent properties, including the type of model space (cartesian or
axisymmetric), information regarding the symmetry and global mesh, as well as the list of
user variables and functions
l Analysis: contains the analysis definition parameters for the currently loaded model
Figure 3.8 Right Hand Side Panel - Analysis tab
New Features in Opera Version 2020, December 2019Chapter 3 Opera-2d Graphical User Interface: Left Hand Side (LHS) Panel 31
Left Hand Side (LHS) Panel
Overview
The Left Hand Side (LHS) panel provides the list of model entities that exist in the currently
loaded model:
l Bodies: geometric entities that are used to define the model
l Construction Helpers: straight lines and arc that can be used to help with building the geo-
metry
l Region Tags: labels used to group together model regions that have common attributes
(e.g. conductors belonging to the same phase)
l Materials: labels for defining material properties, which are applied to model region
l Volume Properties: labels used to define region properties, such as current density and
material orientation
l Boundary Conditions: labels which contain the boundary conditions applied to model
edges
l Conductors: labels that are used to link regions in the model with conductor sets in the Cir-
cuit Editor (only available for transient and steady-state analyses)
l Machine Components: labels for the different components of an electrical machine (this
section is only shown if a machine airgap is defined)
l Emitters: labels for the emitters defined (only available if the Charged Particle solver is
selected)
l Post-Processing items: entities used for displaying and post-processing results (this sec-
tion is only shown if a valid solution is loaded)
Note: Some of these sections are only available when certain solver types are selected or when a
solution is loaded.
From the LHS panel, users can create, delete, select and edit model components, as well as change
the visibility of these components in the canvas.
Selection Options
The Selection Options dialog allows selecting bodies in the canvas:
l Select All: select all existing bodies
l Clear Selection: clear the currently selected bodies
l Unstructured Meshing: select bodies which have unstructured mesh assigned to their
regions
l Structured Meshing: select bodies which have structured mesh assigned to their regions
l Mesh Size: select bodies which have a certain mesh size assigned to their regions (the drop-
down menu provides a list of existing mesh sizes)
l Errors: select bodies which contain errors
Individual bodies can be selected from the LHS panel by left-clicking on their name.
Version 2020, December 2019 New Features in Opera32 Chapter 3 Opera-2d Graphical User Interface: Left Hand Side (LHS) Panel
Figure 3.9 Selection Options menu
View Options
The View Options dialog allows modifying the visibility of entities in the canvas:
l Hide All: hide all bodies
l Show All: show all bodies
l Hide Construction Helpers: hide all construction lines
l Show Construction Helpers: show all construction lines
l Hide Selection: hide the selected bodies
l Show Selection: show selected bodies
Individual bodies can be shown or hidden using the toggle button / next to each body name.
Figure 3.10 View Options menu
New Features in Opera Version 2020, December 2019Chapter 3 Opera-2d Graphical User Interface: Left Hand Side (LHS) Panel 33
Select Items Using
Regions can be selected in the canvas based on their links to labels defined in the LHS panel, such as
material labels, volume property labels, conductor labels or region tags. The operation works by first
selecting the label(s) from the LHS panel and then clicking on the Select Items Using toolbutton
.
Modify Items
New items can be created using the Add new item toolbutton , which is available for all types
of items in the LHS panel, with the exception of bodies (which can only be created using the geo-
metry controllers).
Existing items can be edited using the Edit item toolbutton .
Existing items can also be duplicated (along with the properties that have already been assigned to
them) using the Duplicate item toolbutton .
Items from the LHS panel (including bodies) can be deleted from the model using the Delete item
toolbutton . Items that are already in use (for example a material label that has been assigned to
a region) cannot be deleted.
Version 2020, December 2019 New Features in Opera34 Chapter 3 Opera-2d Graphical User Interface: View Settings Menu
View Settings Menu
The View Settings Menu is used to define options related to the visibility of the model geometry
and the canvas.
The following options can be defined:
l X (R), Y (Z), Zoom Size: view center point and zoom
l Model Rotation Symmetry: display the geometry of the full model (for models with rota-
tional symmetry)
l Show Grid: display the grid
l Show Axes: display the axes
l Show Outlines: display of the outlines of bodies
l Show Mesh: display of mesh (available after the mesh has been generated)
l Axisymmetry RZ / ZR: swap position of the axes for axisymmetric models
l Show Deformed Mesh: display of deformed mesh (only for solved mechanical models)
There is also a toolbutton that offers the option to Zoom to Fit, so that the entire model is included
in the view. This toolbutton is available both when the dialog is open and closed.
Figure 3.11 View Settings Menu - Axisymmetric model
New Features in Opera Version 2020, December 2019Chapter 3 Opera-2d Graphical User Interface: Keyboard Actions Menu 35
Keyboard Actions Menu
The Keyboard Actions menu is a context sensitive and ‘read-only’ section of the LHS panel which
displays the possible actions and the related keyboard shortcuts. It is shown at the bottom of the
LHS panel and is automatically populated when a canvas operation is selected.
Figure 3.13 Keyboard Actions menu - boolean
Figure 3.12 Keyboard Actions menu - geometry operation
controller
Version 2020, December 2019 New Features in Opera36 Chapter 3 Opera-2d Graphical User Interface: Python Console / Message Pane
Python Console / Message Pane
At the bottom of the Graphical User Interface, a pane can be opened. In this pane, either a Python
Console can be activated or a Message Pane can be shown.
Python Console
The Python console allows the user to run Python commands directly from the interface and interact
with the model.
The Python console provides auto-complete suggestions to help facilitate writing Python commands.
The auto-complete suggestion can be triggered using the TAB key, once a section of the desired com-
mand has been typed.
Additional help on the use of Python commands and their syntax can be obtained using the help
method:
In : help(model.boolean_trim)
Help on method boolean_trim:
boolean_trim(...) method of _opera2d.ModelInterface instance
boolean_trim( (ModelInterface)arg1, (Opera2dBodyItem)first_
body, (object)other_bodies [, (object)name='']) -> Oper-
a2dBodyItem :
The intersection of first_body and other_bodies is removed
from the first_body.
Args:
first_body (Opera2dBodyItem): The body to trim parts from.
other_bodies (list(Opera2dBodyItem)): The bodies to remain
intact, the intersections of these
bodies with first_body will be removed from first_body.
name (str, optional): The name of the result of the boolean
operation.
Returns:
New Features in Opera Version 2020, December 2019Chapter 3 Opera-2d Graphical User Interface: Python Console / Message Pane 37
Opera2dBodyItem: The resulting body of the boolean oper-
ation.
Raises:
ValueError: If the first_body has no region.
If none of the other_bodies have regions.
If any of the bodies provided are Post-Processing bodies.
If the boolean command failed to run in some other way.
For more details on the use of Python as the scripting language in Opera, please see the section
"Python and Opera-2d" on page 38.
Message Pane
The Message Pane displays messages that are reported by the software to the user. These mes-
sages can be one of three different types:
l Errors: printed in red color. These report errors that the software returns. They usually mean
that an action that the user has requested is invalid.
l Warnings: printed in yellow color. These are intended to inform the user of potential issues.
l Information: printed in blue color. These pass relevant information to the user. They are used
to return Python errors.
Version 2020, December 2019 New Features in OperaChapter 4
Python and Opera-2d
Introduction
The scripting language for Opera-2d is Python. Below is a short Python nomenclature for some of the
terms used most frequently in the following sections.
Name Definition
Package A folder containing Python modules; a set of Python modules
Module A file containing related Python classes, functions and variables
Method Python function
Python Functionality Provided with Opera-2d
The Opera 2020 distribution includes the Intel Distribution for Python 2019 Update 5 which uses the
Conda package management system and includes Python 3.6.9.
A Python package is provided as part of the Opera installation. This includes all of the capabilities
needed for interacting with Opera-2d from the Python interface. The name of this package is oper-
apy.
The full list of Opera Python commands and their syntax can be found in the form of an HTML file in
the Opera Manager Help menu, Reference Manuals (html) / Opera-2d Python Reference Manual.
The scripting functionalities are grouped in two modules:
l canvas – contains methods related to the canvas (e.g. zoom level, canvas size)
l opera2d– contains methods used for interacting with the model (e.g. model building, setup,
post-processing and graphing).
Both modules are automatically imported on startup of Opera-2d, so they can be accessed directly,
without the need for a manual import command. This can be seen in the Python console:
Pre Imported Modules: ['operapy', 'operapy.canvas', 'operapy.opera2d']
Version 2020, December 2019 New Features in Opera39 Chapter 4 Python and Opera-2d:
The opera2d module contains a number of interfaces, which group the commands that interact with
the software at different stages of the FE analysis process. The full list of provided interfaces is
shown in the table below.
The most important of these interfaces is the one that provides access to the model. This is also auto-
matically loaded on startup and the model object is available for use. The model contains data for
the currently loaded model and methods that allow interaction with this data.
The other interfaces all work on an existing model; hence, as part of their initialization, the current
model needs to be provided as an argument.
Interface Method Name Description
Model get_model_interface() Allows interaction with the model. Through
these methods, the geometry can be built,
modified and cleared.
Post-Processing get_post_processing_ Contains the commands for post-processing
interface(model) results, including creating maps, calculating
integrals and exporting tables. Requires a
model with a solution to be loaded.
Circuit get_circuit_interface Provides access to the Circuit Editor. Circuits
(model) can be created, modified and imported /
exported. Requires a model to be loaded.
Graphing get_graphing_interface Provides access to the graph tab. Data can be
(model) loaded from buffers, lines and graphs can be
created and modified. Requires a model to be
loaded.
Winding Tool get_winding_tool_ Provides access to the Winding Tool and
interface(model) stored winding sets generated by the winding
tool. Requires a model to be loaded.
Alternatively, the name of the available interfaces can be found using the help functionality available
in Python, or by using the auto-complete feature, as explained in "Python Console / Message Pane"
on page 36.
The section "Opera Python Example Scripts" on page 43 includes a number of examples showing the
use of these interfaces and some of the methods they contain, including how to build geometry, setup
the analysis and post-process a model.
New Features in Opera Version 2020, December 2019Chapter 4 Python and Opera-2d: Export to Python 40 Export to Python The current model can be exported to a Python file at any point using the Export to Python toolbutton ,located in the Work tab. The Python file that is generated contains the Python commands that correspond to the current status of the model. Version 2020, December 2019 New Features in Opera
41 Chapter 4 Python and Opera-2d: Writing Python Scripts
Writing Python Scripts
The Python Environment must be activated to run the standalone Python interpreter and Conda pack-
age management tools.
To run the Python interpreter from a Command Prompt on Windows, open the Command Prompt and
enter the command: /code/bin/Scripts/activate.bat . The python and conda
commands can now be used.
To run the Python interpreter from a bash shell on Linux, enter the command:
source /python/bin/activate
Integrated Development Environment (IDE)
An Integrated Development Environment (IDE) is an application that provides facilities for
writing software code. There are numerous, freely available IDEs that support the Python language
and any one of these can be used to write and test code written for Opera-2d.
IDLE
A simple Python Shell and IDE is provided as part of the Opera installation. The name of the IDE is
IDLE .
On Windows IDLE can be accessed from a command prompt where Python is activated (see previous
section) by typing idle.
On Linux IDLE can be accessed from a bash shell where Python is activated (see previous section) by
typing idle3 or idle3.6.
Other IDEs
Other IDEs are available for download and install separately and they can be configured to work with
the Opera Python modules. These IDEs can offer more functionality, including code introspection,
auto-complete and code debugging.
The chosen IDE needs to be configured to use the Python distribution that has been provided with
Opera. This ensures that the Opera Python packages are recognized by the IDE and functionality like
auto-complete and debugging is available. The configuration typically involves specifying the path to
the Python executable to use.
The Python executable can be found under /code/bin/python.exe on Win-
dows and /python/bin/python on Linux.
Most IDEs can be configured to work with the Conda package management system but may need to
be told where the location of the conda command:
New Features in Opera Version 2020, December 2019Chapter 4 Python and Opera-2d: Writing Python Scripts 42
l /code/bin/Scripts/conda.exe on Windows
l /python/bin/conda on Linux
Opera 2020 will only work with the root environment of the included Conda distribution (bin on Win-
dows, python on Linux)
It is possible to install additional Python packages using conda install but some packages may
be incompatible and stop Opera from working.
If you intend to add additional Python packages on Windows you should install Opera in a location
where users have write access and avoid using spaces in the path (e.g.
c:/ws/OperaFEA/Opera_2020).
Version 2020, December 2019 New Features in OperaYou can also read
