PoBaseView Class Reference
[Views]
Abstract base class for views.
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#include <Inventor/Gui/view/PoBaseView.h>
Public Member Functions | |
| virtual SoType | getTypeId () const |
| virtual const SoNodekitCatalog * | getNodekitCatalog () const |
| SbBool | isPointWithinViewport (float x, float y) const |
| void | setCamera (SoGuiViewer *viewer) |
| void | sensitiveOnEvents (SbBool flag) |
| SbBool | isSensitiveOnEvents () const |
Static Public Member Functions | |
| static SoType | getClassTypeId () |
| static const SoNodekitCatalog * | getClassNodekitCatalog () |
| static PoBaseView * | getView (SoGuiViewer *viewer, int mouseX, int mouseY) |
Public Attributes | |
| SoSFVec2f | viewportOrigin |
| SoSFVec2f | viewportSize |
Deprecated | |
|
| |
| static SoDEPRECATED SbBool | viewingEventCB (void *viewer, void *anyEvent) |
Detailed Description
Abstract base class for views.
Views allow the application to specify multiple cameras, each with its own separate viewport (region of the 3D window). This is more powerful than just using multiple SoCamera nodes, because camera nodes do not allow specifying a viewport (the viewport is always the full window).
In addition, when mouse event locations are mapped back into 3D space, Open Inventor automatically uses the view volume of the camera associated with the view whose viewport currently contains the mouse cursor.
Views can be used to efficiently create the effect of multiple windows, without the overhead and system dependent code to manage multiple windows. For example, views can be used to subdivide the window into multiple independent views of a 3D scene or to create an inset "bird's eye" view inside the window.
Basically, a view consists of a camera (specifically an SoCameraKit) and a viewport attached to this camera. The viewport is the region of the graphics window in which the scene graph will be rendered.
NOTES:
- If you use a viewer, you should call the method SoBaseKit::setSearchingChildren(TRUE) to allow the viewer to search for cameras inside nodekits (like this one).
- Do not place a camera node before this nodekit.
- Create a camera for each view and set it using the setPart method. See example in PoSceneView.
- When you use HardCopy, the graphics window is the paper sheet.
LIMITATIONS:
- The field SoCamera::viewportMapping must be equal to ADJUST_CAMERA in order to have a correct vectorisation when you use HardCopy,
- Do not use the SoBoxHighlightRenderAction class on a scene graph which contains a view,
- Do not push view,
- Be careful when you use the method viewAll() of the class SoXtViewer, because this method works on the entire scene graph and not on a portion of a scene graph. Overload this method according to your requirements,
- Some of the viewer functions/buttons do not work correctly with views.
For example, saveHomePosition() and resetToHomePosition() do not work correctly because the viewer only stores one copy of the camera. - The viewer rendering options, e.g. wireframe, apply to ALL views inside the viewer. You can implement these effects per-view using an SoDrawStyle node and setOverride() if necessary.
- Views are not compatible with the VRML file format.
CHANGES:
- Since Open Inventor 8.1, PoBaseView and related classes (PoView, PoSceneView and PoToVRML2Action) have been moved from MeshViz into core Open Inventor.
- Since Open Inventor 8.1, the callback viewingEventCB no longer needs to be registered. This is now done automatically in the So<XXX>Viewer classes.
ACTION BEHAVIOR
- Sets: SoGLViewportRegionElement, SoLogicalViewportElement, SoModifyViewVolumeElement, SoViewportRegionElement, SoGLUpdateAreaElement
SEE ALSO
Member Function Documentation
| static const SoNodekitCatalog* PoBaseView::getClassNodekitCatalog | ( | ) | [static] |
Returns the SoNodekitCatalog for this class.
Reimplemented from SoBaseKit.
Reimplemented in PoSceneView, and PoView.
| static SoType PoBaseView::getClassTypeId | ( | ) | [static] |
Returns the type identifier for this class.
Reimplemented from SoBaseKit.
Reimplemented in PoSceneView, and PoView.
| virtual const SoNodekitCatalog* PoBaseView::getNodekitCatalog | ( | ) | const [virtual] |
Returns the SoNodekitCatalog for this instance.
Reimplemented from SoBaseKit.
Reimplemented in PoSceneView, and PoView.
| virtual SoType PoBaseView::getTypeId | ( | ) | const [virtual] |
Returns the type identifier for this specific instance.
Reimplemented from SoBaseKit.
Reimplemented in PoSceneView, and PoView.
| static PoBaseView* PoBaseView::getView | ( | SoGuiViewer * | viewer, | |
| int | mouseX, | |||
| int | mouseY | |||
| ) | [static] |
Returns the view (if any) that contains the given mouse cursor position.
If the viewports of multiple views overlap, the chosen view is the last view drawn (i.e. last view node traversed). Only a sensitive view (see sensitiveOnEvents() method) can be selected, others are ignored during the search. (See Chapter 10 of the Open Inventor Mentor, page 266-268, for the method for getting mouse coordinates).
Note: For portability, this method does not take a system dependent viewer class, e.g. SoXtViewer, as its parameter. The SoGuiViewer associated with a viewer can be retrieved using the viewer's getGuiViewer() method.
| SbBool PoBaseView::isPointWithinViewport | ( | float | x, | |
| float | y | |||
| ) | const |
Indicates if a point defined in the normalized space [0-1]x[0-1] is in the viewport of the view.
| SbBool PoBaseView::isSensitiveOnEvents | ( | ) | const [inline] |
Returns true if the view is sensitive to events.
| void PoBaseView::sensitiveOnEvents | ( | SbBool | flag | ) | [inline] |
Specifies if the view is sensitive to events.
Default is false.
| void PoBaseView::setCamera | ( | SoGuiViewer * | viewer | ) |
Sets the camera of the view on the viewer.
(This method is equivalent to: viewer->setCamera(camera) with camera being the camera of the view).
Note: For portability, this method does not take a system dependent viewer class, e.g. SoXtViewer, as its parameter. The SoGuiViewer associated with a viewer can be retrieved using the viewer's getGuiViewer() method.
| static SoDEPRECATED SbBool PoBaseView::viewingEventCB | ( | void * | viewer, | |
| void * | anyEvent | |||
| ) | [inline, static] |
The callback is automatically registered in the So<XXX>Viewer classes.
- Deprecated:
-
Deprecated since Open Inventor 8100
No longer used.
Member Data Documentation
Lower-left corner coordinates of the viewport of the view.
These coordinates must be given in the normalized space [0-1]*[0-1]. The coordinate (0,0) is the lower- left corner of the display window and (1,1) is the upper-right corner. Default is 0,0.
Size of the viewport of the view.
viewportSize[0] is the viewport's width and viewportSize[1] is the viewport's height, each in normalized space. Therefore viewportOrigin[0]+viewportSize[0] and viewportOrigin[1]+viewportSize[1] must be less than or equal to 1. Default is 1,1.
The documentation for this class was generated from the following file:
- Inventor/Gui/view/PoBaseView.h