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32.7.10 Display/Scene...

The Display/Scene... menu item opens the Scene Description panel. This menu item becomes available when you display grids, surfaces, contours, vectors, or pathlines in the graphics window.



Scene Description Panel


The Scene Description panel allows you to turn overlays on and off, select geometric objects in the display for modification or deletion, and open panels that control various characteristics of the selected object(s). (Note that you cannot use the Scene Description panel to control XY plot and histogram displays.) See Section  28.5 for details about the items below.

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Controls

Names   contains a list of the geometric objects that currently exist in the scene (including those that are presently invisible). You can specify the object or objects to be manipulated by selecting names in this list. If you select more than one object at a time, any operation (transformation, color specification, etc.) will apply to all the selected objects. You can also select objects by clicking on them in the graphics display using the mouse probe button, which is, by default, the right mouse button. (See Section  28.3 for information about mouse button functions.) To deselect a selected object, simply click on its name in the Names list. See Section  28.5.1 for details.

Geometry Attributes   contains information about the type of the selected geometric object and push buttons which open panels for modifying the object.
Type   reports the type of the selected object. Possible types include grid, surface, contour, vector, and Group. This information is especially helpful when you need to distinguish two or more objects with the same name. When more than one object is selected, the type displayed is Group.

Display...   opens the Display Properties panel, which allows you to change the color, visibility, and other properties for the selected object.

Transform...   opens the Transformations panel, which allows you to translate, rotate, and scale the selected object.

Iso-Value...   opens the Iso-Value panel, which allows you to change the isovalue of an isosurface. This push button is available only if the geometric object selected in the Names list is an isosurface or a object on an isosurface (contour on an isosurface, for example); otherwise it is grayed out.

Pathlines...   opens the Pathline Attributes panel, which allows you to set the maximum number of steps for the selected pathlines. This is most useful in animating the path of a set of particles.

Scene Composition   contains controls for enabling overlays and bounding frames.

Overlays   activates the superimposition of a new geometry onto a currently displayed geometry. See Section  28.2.1 for details.

Draw Frame   activates the display of a bounding frame in the graphics display. See Section  28.5.7 for details.

Frame Options...   opens the Bounding Frame panel, in which you can define properties of the bounding frame. See Section  28.5.7 for details.

Delete Geometry   deletes the geometric object that is currently selected in the Names list. The ability to delete individual objects is especially useful if you have overlays on and you generate an unwanted object (e.g., if you generate contours of the wrong variable). You can simply delete the unwanted object and continue your scene composition, instead of starting over from the beginning.

Apply   saves the status of Overlays and Draw Frame. When you turn Overlays or Draw Frame on or off, you must click on the Apply push button to see the effect of the change on subsequent display operations.



Display Properties Panel


To modify the color, visibility, and other display properties for individual geometric objects in the graphics display, use the Display Properties panel. You can open this panel by clicking on the Display... push button in the Scene Description panel. See Section  28.5.2 for details about the items below.

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Controls

Geometry Name   displays the name of the object you selected for modification in the Scene Description panel.

Visibility   contains check buttons that control options related to the visibility of the selected object. See Section  28.5.2 for details.
Visible   toggles the visibility of the selected object. If it is turned on, the object will be visible in the display, and if it is turned off, the object will be invisible.

Lighting   turns the effect of lighting for the selected object on or off. You can choose to have lighting affect only certain objects instead of all of them. Note that if Lighting is turned on for an object such as a contour or vector plot, the colors in the plot will not be exactly the same as those in the colormap at the left of the display.

Faces   toggles the filled display of faces for the selected grid or surface object. Turning Faces on has the same effect as turning on the display of faces in the Grid Display panel.

Outer Faces   toggles the display of outer faces.

Edges   toggles the display of interior and exterior edges of the geometric object.

Perimeter Edges   toggles the display of the outline of the geometric object. (This option has no effect on the display of grids.)

Feature Edges   toggles the display of feature lines (if any) of the geometric object.

Lines   toggles the display of the lines (if any) in the geometric object.

Nodes   toggles the display of the nodes (if any) in the geometric object.

Colors   contains controls for setting face, edge, line, and node colors, and transparency for faces. See Section  28.5.2 for details.

Color   specifies the face, edge, line, or node color for modification. When you turn on this button, the color scales below will show the current color specification, which you can modify by moving the sliders on the color scales.

Red, Green, Blue   are color scales with which you can specify the RGB components of the face, edge or line color.

Transparency   sets the relative transparency of the selected object. An object with a transparency of 0 is opaque, and an object with a transparency of 100 is transparent.



Transformations Panel


You can use the Transformations panel to translate, rotate, or scale individual objects in the graphics display. To open this panel, click on the Transform... push button in the Scene Description panel. See Section  28.5.3 for details about the items below.

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Controls

Geometry Name   displays the name of the object you selected for modification in the Scene Description panel.

Meridional   (3D only) enables the display of the meridional view. This option is especially useful in turbomachinery applications.

Translate   contains X, Y, and Z real number fields in which you can enter the distance by which to translate the selected object in each direction.

Rotate by   contains X, Y, and Z integer number fields in which you can enter the number of degrees by which to rotate the selected object about each axis.

Rotate about   specifies the point about which to rotate the object.

Scale   contains X, Y, and Z real number fields in which you can enter the amount by which to scale the selected object in each direction. To avoid distortion of the object's shape, be sure to specify the same value for all three entries.



Iso-Value Panel


The Iso-Value panel allows you to change the isovalue of an isosurface. The isosurface can be selected directly in the Names list or indirectly by selecting an object displayed on the isosurface. When you change the isovalue, any contours, vectors, etc. that were displayed on the original isosurface will be displayed on the isosurface with the new isovalue. To open this panel, click on the Iso-Value... push button in the Scene Description panel. See Section  28.5.4 for details about using this panel.

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Controls

Geometry Name   displays the name of the geometric object (isosurface) you selected for modification in the Scene Description panel.

Min, Max   show the minimum and maximum values of the isosurface variable.

Value   sets the new isovalue for isosurfaces. After you change the value and click on Apply, contours, vectors, or pathlines that were displayed on the original isosurface will be displayed for the new isovalue. You can also use the slide bar to change the Value.



Pathline Attributes Panel


The Pathline Attributes panel allows you to change the number of steps used in the computation of pathlines. This is most useful in creating animations of pathlines. To open this panel, click on the Path Attr... push button in the Scene Description panel. See Section  28.5.5 for details about using this panel.

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Controls

Geometry Name   displays the name of the geometric object you selected for modification in the Scene Description panel.

Max Steps   sets the new maximum number of steps for pathline computation. After you change the value and click on Apply, the selected pathline will be recomputed and redrawn.



Bounding Frame Panel


The Bounding Frame panel allows you to add a bounding frame with optional measure markings to the display of the domain. See Section  28.5.7 for details about the items in this panel.

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Controls

Frame Extents   indicates the extents of the bounding frame.
Domain   specifies that the frame should encompass the domain extents.

Display   specifies that the frame should encompass the portion of the domain that is shown in the display.

Axes   contains controls for specifying the frame boundaries and measurements. See Section  28.5.7 for instructions on using these items.

Display   updates the active graphics window with the current frame settings.


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