SoXtViewer Class Reference
[Xt]
Viewer component lowest base class. More...
#include <Inventor/Xt/viewers/SoXtViewer.h>
Detailed Description
Viewer component lowest base class.
This is the lowest base class for viewer components. This class adds the notion of a camera to the SoXtRenderArea class. Whenever a new scene is specified with setSceneGraph(), the first camera encountered will be by default used as the edited camera. If no camera is found in the scene, the viewer will automatically create one. If the viewer type is SoXtViewer::BROWSER then the camera is told to view the supplied scene graph but is not added beneath that scene graph root. If the viewer type is SoXtViewer::EDITOR then the camera is added beneath the supplied scene graph root.
In addition to automatically creating a camera if needed, this base class also creates a headlight (directional light which is made to follow the camera), and enables the user to change drawing styles (like wireframe or move wireframe), and buffering types. When the headlight is enabled, a group node is added immediately following the edited camera. This group contains a directional light node.
This base class also provides a convenient way to have the camera near and far clipping planes be automatically adjusted to minimize the clipping of objects in the scene.
Viewers allow the application to shadow event processing. When the application registers an event processing callback by calling setEventCallback() the viewer will invoke this callback for every X event it receives. However, unlike the render area, the viewer ignores the return value of this callback, and processes the event as usual. This allows the application to expand viewing capabilities without breaking the viewing paradigm. It is an easy way to hook up other devices, like the spaceball, to an existing viewer.
Depending on the DecimationStrategy, a viewer can control the complexity of a scene by adjusting the Decimation elements to reach certain goals. The viewer can attempt to keep a constant frame rate or a constant number of triangles rendered. The viewer can be set to switch to full detail when the scene is not moving.
In order to set the frame rate, the viewer times each render action traversal, and then adjusts the Decimation percentage to keep the time within a range depending on the goal frames per second. To fix the number of triangles, the viewer applies a GetPrimitiveCountAction before each traversal and sets the DecimationPercentage to the desired percentage of the resulting count.
If the DecimationStrategy is NORMAL (the default) then nothing special is done. If the strategy is FIXED_PERCENTAGE, then the same percentage is used for every render. Also note that FIXED_PERCENTAGE sets the DecimationType to be PERCENTAGE (all others use AUTOMATIC), which means that instances of SoLOD will not use the camera position in their calculations, and can therefore be cached.
The application can add callbacks from the viewer to get the current decimation level, the current primitive count and the current frames per second. The decimation level and primitive count callbacks are called every frame. The frames per second callback is called after a certain number of samples have been averaged together.
SEE ALSO
SoXtComponent, SoXtRenderArea, SoXtExaminerViewer, SoXtWalkViewer, SoXtFlyViewer, SoXtPlaneViewer
Member Enumeration Documentation
Classic cursors are all white and tend to disappear over white geometry or white background.
New styles avoid that problem (but have quirks of their own of course :-). Added for v2.6
list of possible drawing styles
Note: Refer to the SoXtViewer man pages for a complete description of those draw styles.
- Enumerator:
| enum SoXtViewer::DrawType |
| enum SoXtViewer::Type |
An EDITOR viewer will create a camera under the user supplied scene graph (specified in setSceneGraph()) if it cannot find one in the scene and will leave the camera behind when supplied with a new scene.
A BROWSER viewer will also create a camera if it cannot find one in the scene, but will place it above the scene graph node (camera will not appear in the user supplied scene graph), and will automatically remove it when another scene is supplied to the viewer.
Member Function Documentation
| virtual void SoXtViewer::actualRendering | ( | ) | [virtual] |
This method is called automatically when the viewer requests that its SoBaseStereo object perform stereo rendering.
actualRendering() may then be called twice (once for each eye view) and therefore must not take into account any stereo-specific settings. It should behave as if it were a rendering method for a monoscopic view.
Implements SoStereoViewer.
| void SoXtViewer::addFinishCallback | ( | SoXtViewerCB * | f, | |
| void * | userData = NULL | |||
| ) | [inline] |
Adds finish callback routines on the viewer.
Start callbacks are called whenever the user starts doing interactive viewing (for example, mouse down), and finish callbacks are called when user is done doing interactive work (for example, mouse up).
Note: The viewer "this" pointer is passed as callback data.
| void SoXtViewer::addStartCallback | ( | SoXtViewerCB * | f, | |
| void * | userData = NULL | |||
| ) | [inline] |
Adds start callback routine on the viewer.
Start callbacks are called whenever the user starts doing interactive viewing (for example, mouse down), and finish callbacks are called when user is done doing interactive work (for example, mouse up).
Note: The viewer "this" pointer is passed as callback data.
| virtual SoDEPRECATED void SoXtViewer::adjustClippingPlanes | ( | ) | [virtual] |
- Deprecated:
-
Deprecated since Open Inventor 9000
use adjustCameraClippingPlanes() Instead.
| void SoXtViewer::copyView | ( | Time | eventTime | ) |
Copies the view.
eventTime should be the time of the X event which initiated the copy (e.g. if copy is initiated from a keystroke, eventTime should be the time in the key down message.)
| void SoXtViewer::enableFullRenderingWhenStill | ( | SbBool | onOff | ) |
If this flag is set, the viewer will render at full resolution when it sits still for a certain period of time.
Default is false.
The default value can be set using the environment variable OIV_FULL_RENDER_WHEN_STILL (0 = FALSE, 1 = TRUE).
| virtual void SoXtViewer::enableSeekWithOrtho | ( | SbBool | flag | ) | [inline, virtual] |
If FALSE, the seek functionality is disabled for an SoOrthographicCamera.
Default is TRUE.
| float SoXtViewer::getAutoClipTolerance | ( | ) | const [inline] |
Gets the auto clipping tolerance value.
| virtual const SbVec2s& SoXtViewer::getBottomRight | ( | ) | [virtual] |
Returns the position of the OpenGL drawing window in absolute screen coordinates (not relative to parent window) of the native window system (typically Y increasing downward).
Returns "Bottom" in the first value of the vector and "Right" in the second value (reverse of the usual X,Y ordering).
Implements SoStereoViewer.
| SoXtViewer::BufferType SoXtViewer::getBufferingType | ( | ) | [inline] |
Gets the current buffering type in the main view.
| SoCamera* SoXtViewer::getCamera | ( | ) | [inline] |
Gets the edited camera.
| SoNode* SoXtViewer::getCameraSceneGraph | ( | ) |
Gets the sub-scene graph to be viewed.
| SoType SoXtViewer::getCameraType | ( | ) | [inline] |
Gets the camera type that will be created by the viewer if no cameras are found in the scene graph (see SoPerspectiveCamera and SoOrthographicCamera).
| float SoXtViewer::getCurrentDecimationPercentage | ( | ) |
Returns the Decimation Percentage the viewer used in its last render.
| SoXtViewer::CursorStyle SoXtViewer::getCursorStyle | ( | ) | [inline] |
Returns the cursor style.
| SoXtViewer::DecimationStrategy SoXtViewer::getDecimationStrategy | ( | ) | [inline] |
Gets strategy to use to decide on decimation value.
| SbBool SoXtViewer::getDepthValue | ( | int | x, | |
| int | y, | |||
| float & | depth | |||
| ) | [inline] |
Returns the depth value, scaled between 0.0 and 1.0, from the depth buffer at window coordinates x, y.
This is only valid after a traversal of the scene graph e.g., in a post render callback (see setPostRenderCallback()).
| SoXtViewer::DrawStyle SoXtViewer::getDrawStyle | ( | SoXtViewer::DrawType | type | ) |
Queries the current drawing style in the main view.
| float SoXtViewer::getFixedPercentage | ( | ) | [inline] |
Gets fixed percentage for the viewer to render (0.0 to 1.0).
| float SoXtViewer::getGoalFramesPerSecond | ( | ) | [inline] |
Gets goal frames per second for the viewer to try to render.
| int32_t SoXtViewer::getGoalNumberOfTriangles | ( | ) | [inline] |
Gets goal number of triangles for the viewer to try to render.
| SoDirectionalLight* SoXtViewer::getHeadlight | ( | ) | [inline] |
Returns the headlight node.
| int SoXtViewer::getNumSamples | ( | ) | [inline] |
Gets how many frames should be timed before frames per second callback is called.
| float SoXtViewer::getPickRadius | ( | ) | const |
Returns the current pick radius for picking and seeking actions.
| virtual SoNode* SoXtViewer::getSceneGraph | ( | ) | [virtual] |
Gets the scene graph to render.
Reimplemented from SoXtRenderArea.
| SoSeparator* SoXtViewer::getSceneRoot | ( | ) | [inline] |
| float SoXtViewer::getSeekTime | ( | ) | [inline] |
Queries the seek time.
| virtual const SbVec2s& SoXtViewer::getSize | ( | ) | [virtual] |
Returns the size of the OpenGL drawing window in absolute screen coordinates (not relative to parent window) of the native window system.
Implements SoStereoViewer.
| virtual float SoXtViewer::getStereoBalance | ( | ) | [virtual] |
Queries the stereo balance (the position of the zero parallax plane).
Implements SoStereoViewer.
| float SoXtViewer::getStereoOffset | ( | ) | [virtual] |
| SoBaseStereo* SoXtViewer::getStereoViewType | ( | ) | [virtual] |
Returns the stereo view type.
Implements SoStereoViewer.
| virtual const SbVec2s& SoXtViewer::getTopLeft | ( | ) | [virtual] |
Returns the position of the OpenGL drawing window in absolute screen coordinates (not relative to parent window) of the native window system (typically Y increasing downward).
Returns "Top" in the first value of the vector and "Left" in the second value (reverse of the usual X,Y ordering).
Implements SoStereoViewer.
| virtual SoCamera* SoXtViewer::getViewerCamera | ( | ) | [virtual] |
Returning the camera allows the SoBaseStereo to manipulate it to achieve the stereo effect.
Implements SoStereoViewer.
| void SoXtViewer::getViewport | ( | short & | left, | |
| short & | bottom, | |||
| short & | width, | |||
| short & | height | |||
| ) | [virtual] |
Returns viewport region with origin (lower-left corner) and size, given as pixel coordinates.
Implements SoStereoViewer.
| SbBool SoXtViewer::isAutoClipping | ( | ) | const [inline] |
Queries if auto clipping is ON.
| virtual SbBool SoXtViewer::isCameraHeightAnglePreserved | ( | ) | const [inline, virtual] |
Query whether the SoPerspectiveCamera's heightAngle is preserved if the camera is changed to an SoOrthographicCamera and then toggled back to an SoPerspectiveCamera.
| SbBool SoXtViewer::isCursorEnabled | ( | ) | const [inline] |
Queries whether the viewer is allowed to change the cursor over the renderArea window.
| SbBool SoXtViewer::isDetailSeek | ( | ) | [inline] |
Queries whether the viewer is in seek mode.
| SbBool SoXtViewer::isFullRenderingWhenStill | ( | ) | [inline] |
Queries if the viewer will render at full resolution when it sits still for a certain period of time.
| SbBool SoXtViewer::isHeadlight | ( | ) | [inline] |
Queries if the headlight is on.
| virtual SbBool SoXtViewer::isSeekWithOrthoEnabled | ( | ) | const [inline, virtual] |
Query whether the seek functionality is enabled for an SoOrthographicCamera.
| virtual SbBool SoXtViewer::isStereoAbsoluteAdjustments | ( | ) | const [inline, virtual] |
Queries if the stereo adjustments are absolute.
Not virtual pure for compatibity reasons.
Reimplemented from SoStereoViewer.
| virtual SbBool SoXtViewer::isStereoActive | ( | ) | [virtual] |
Queries stereo activation.
Implements SoStereoViewer.
| virtual SbBool SoXtViewer::isStereoBalanceNearFrac | ( | ) | [virtual] |
Returns TRUE when the stereo balance adjustement is defined as a fraction of the camera near distance.
Implements SoStereoViewer.
| virtual SbBool SoXtViewer::isStereoViewing | ( | ) | [virtual] |
Queries if stereo viewing is on or off on the viewer.
See setStereoViewing() for additional info.
| SbBool SoXtViewer::isStereoViewReversed | ( | ) | [virtual] |
Queries reversal of the left and right views.
Implements SoStereoViewer.
| SbBool SoXtViewer::isStillNow | ( | ) | [inline] |
Returns whether the viewer is currently still.
| virtual SbBool SoXtViewer::isViewerDoubleBuffer | ( | ) | [virtual] |
Queries if viewer is double buffered.
Implements SoStereoViewer.
| SbBool SoXtViewer::isViewing | ( | ) | const [inline] |
Queries whether the viewer is turned on or off.
See setViewing() for details.
| void SoXtViewer::pasteView | ( | Time | eventTime | ) |
Pastes the view.
eventTime should be the time of the X event which initiated the paste (e.g. if paste is initiated from a keystroke, eventTime should be the time in the key down message.)
| virtual void SoXtViewer::recomputeSceneSize | ( | ) | [virtual] |
This can be used to let the viewer know that the scene graph has changed so that the viewer can recompute things like speed which depend on the scene graph size.
Note: This routine is automatically called whenever setSceneGraph() is called.
Reimplemented in SoXtConstrainedViewer.
| void SoXtViewer::removeFinishCallback | ( | SoXtViewerCB * | f, | |
| void * | userData = NULL | |||
| ) | [inline] |
Removes finish callback routine from the viewer.
Note: The viewer "this" pointer is passed as callback data.
| void SoXtViewer::removeStartCallback | ( | SoXtViewerCB * | f, | |
| void * | userData = NULL | |||
| ) | [inline] |
Removes start callback routine from the viewer.
Note: The viewer "this" pointer is passed as callback data.
| virtual void SoXtViewer::resetToHomePosition | ( | ) | [virtual] |
Restores the camera values.
Reimplemented in SoXtConstrainedViewer, SoXtExaminerViewer, and SoXtFlyViewer.
| void SoXtViewer::reverseStereoView | ( | SbBool | reverse | ) | [virtual] |
Sets reversal of the left and right views.
Implements SoStereoViewer.
| virtual void SoXtViewer::saveHomePosition | ( | ) | [virtual] |
Saves the camera values.
Reimplemented in SoXtConstrainedViewer.
| void SoXtViewer::setAutoClipping | ( | SbBool | onOrOff | ) |
Sets the auto clipping plane.
When auto clipping is ON, the camera near and far planes are dynamically adjusted to be as tight as possible around the objects being viewed. When OFF, the user is expected to manually set those planes within the preference sheet (default is on). Default is ON.
The default value can be set using the environment variable OIV_AUTO_CLIPPING (0 = FALSE, 1 = TRUE).
| void SoXtViewer::setAutoClipTolerance | ( | float | tolerance | ) | [inline] |
Sets the auto clipping tolerance value.
Auto clipping normally sets the near and far clip planes based on the scene's bounding box. If the camera is inside the scene bounding box, the near plane is moved in front of the camera using tolerance *bbox size. The default is 0.001.
The default value can be set using the environment variable OIV_AUTO_CLIP_TOLERANCE.
| virtual void SoXtViewer::setBufferingType | ( | SoXtViewer::BufferType | type | ) | [virtual] |
Sets the current buffering type in the main view (default SoXtViewer::BUFFER_DOUBLE).
Reimplemented in SoXtFullViewer.
| virtual void SoXtViewer::setCamera | ( | SoCamera * | cam | ) | [virtual] |
Sets the edited camera.
Setting the camera is only needed if the first camera found in the scene when setting the scene graph isn't the one the user really wants to edit.
Reimplemented in SoXtConstrainedViewer, SoXtExaminerViewer, SoXtFlyViewer, SoXtFullViewer, SoXtPlaneViewer, and SoXtWalkViewer.
| virtual void SoXtViewer::setCameraSceneGraph | ( | SoNode * | cameraSceneGraph | ) | [virtual] |
Sets the sub-scene graph to be used for viewAll computation.
If this sub-scene graph contains a camera, this camera will be used as the viewer camera. Otherwise the first camera of the scene graph will be used. If no camera is found, the viewer will create its own above the root.
When viewAll computes the bounding box that will be used for determining where to position the camera, it will base its computation on this sub-scene graph rather than on the entire scene graph.
It is useful to specify a sub-scene graph when, for instance, you are using a second camera in the scene, followed by annotation. With this method you can exclude the annotation from the viewAll bounding box computation. Note that since Open Inventor 8.0 you can also exclude portions of the scene graph from the bounding box computation using an SoBBox node.
This method can also be useful when using PoView/PoSceneView. As the viewer uses the first camera it finds, it could find the camera of a PoView/PoSceneView. The bounding box would be computed based on the sub-scene graph owned by this PoView/PoSceneView. Thus the global bounding box of the whole scene would be wrong, causing some clipping problems when viewing.
| virtual void SoXtViewer::setCameraType | ( | SoType | type | ) | [virtual] |
Sets the camera type that will be created by the viewer if no cameras are found in the scene graph (see SoPerspectiveCamera and SoOrthographicCamera).
By default an SoPerspectiveCamera will be created if no cameras are found.
Note: The set method will only take effect the next time a scene graph is specified (and if no cameras are found).
Reimplemented in SoXtFlyViewer, and SoXtWalkViewer.
| void SoXtViewer::setCameraTypeChangeCallback | ( | SoXtViewerCameraTypeChangeCB * | callback, | |
| void * | userdata | |||
| ) |
Defines a callback which is called each time the camera type has changed (change from SoPerspectiveCamera to SoOrthographicCamera or vice versa).
| virtual void SoXtViewer::setCursorEnabled | ( | SbBool | onOrOff | ) | [virtual] |
Sets whether the viewer is allowed to change the cursor over the renderArea window.
When disabled, the cursor is undefined by the viewer and will not change as the mode of the viewer changes. When re-enabled, the viewer will reset it to the appropriate icon.
Disabling the cursor enables the application to set the cursor directly on the viewer window or on any parent widget of the viewer. This can be used when setting a busy cursor on the application shell.
Reimplemented in SoXtExaminerViewer, SoXtFlyViewer, SoXtPlaneViewer, and SoXtWalkViewer.
| virtual void SoXtViewer::setCursorStyle | ( | SoXtViewer::CursorStyle | style | ) | [virtual] |
Sets the cursor style.
The standard Open Inventor (CLASSIC) cursors use all white pixels, which can be difficult to see over light colored geometry or background. The XOR and SHADOW style cursors are much easier to see. The XOR style cursors that have a "hand" shape differ from the other styles in that the cursor hotspot is at the tip of the index finger. This generally works better for picking.
The cursor can also be specified using environment variable OIV_CURSOR_STYLE, where the values 0, 1, and 2 specify Classic, XOR, and Shadow cursors respectively.
Note: This method only has an effect if setCursorEnabled is set to TRUE.
| void SoXtViewer::setDecimationPercentageCallback | ( | SoXtViewerDecimationPercentageCB * | callback, | |
| void * | userData = NULL | |||
| ) |
Registers decimation percentage callback.
| void SoXtViewer::setDecimationStrategy | ( | SoXtViewer::DecimationStrategy | strategy | ) |
Sets strategy to use to decide on decimation value.
Default is normal.
Valid values are NORMAL, FIXED_NUM_TRIANGLES, FRAMES_PER_SECOND, FIXED_PERCENTAGE.
| void SoXtViewer::setDetailSeek | ( | SbBool | onOrOff | ) | [inline] |
When the viewer is in seek mode, left mouse clicks initiate a pick, and the viewer changes its orientation and position to look at the picked object.
This routine tells the seeking viewer whether to orient the camera towards the picked point (detail on), or the center of the object's bounding box (detail off). Default is detail on.
| virtual void SoXtViewer::setDrawStyle | ( | SoXtViewer::DrawType | type, | |
| SoXtViewer::DrawStyle | style | |||
| ) | [virtual] |
Sets the current drawing style in the main view.
The user can specify the INTERACTIVE draw style (draw style used when the scene changes) independently from the STILL style. Default is VIEW_AS_IS draw style for STILL and VIEW_SAME_AS_STILL for INTERACTIVE.
The default value can be set using the environment variables OIV_STILL_DRAW_STYLE and OIV_INTERACTIVE_DRAW_STYLE. Valid values are VIEW_AS_IS, VIEW_HIDDEN_LINE, VIEW_NO_TEXTURE, VIEW_LOW_COMPLEXITY, VIEW_LINE, VIEW_POINT, VIEW_BBOX, VIEW_LOW_RES_LINE, VIEW_LOW_RES_POINT for OIV_STILL_DRAW_STYLE and the same plus VIEW_SAME_AS_STILL for OIV_INTERACTIVE_DRAW_STYLE.
Possible draw styles are: VIEW_AS_IS - Leaves the objects unchanged.
VIEW_HIDDEN_LINE - Renders the object as wireframe, but only shows the object front faces. This is accomplished using a two-pass rendering. In the first pass, the objects are rendered as FILLED using the background BASE_COLOR (this sets up the wanted z-buffer values). The second pass then renders the objects as LINES, while adjusting the z-buffer range to limit overlapping polygons problems.
VIEW_NO_TEXTURE - Renders the objects without any textures. This is done by setting the override flag on an empty SoTexture2 node.
VIEW_LOW_COMPLEXITY - Renders the objects without any textures and with a low complexity. This is done by setting the override flag on an empty SoTexture2 node, and by setting a low complexity value on an SoComplexity node with override set to TRUE.
VIEW_LINE - Renders the objects as LINES (no texture) with lighting model set to BASE_COLOR.
VIEW_LOW_RES_LINE - Renders the objects as LINES (no texture) using a low complexity, with lighting model set to BASE_COLOR and no depth comparison.
VIEW_POINT - Renders the objects as POINTS (no texture) with lighting model set to BASE_COLOR.
VIEW_LOW_RES_POINT - Renders the objects as POINTS (no texture) using a low complexity, with lighting model set to BASE_COLOR and no depth comparison.
VIEW_BBOX - Renders the objects with complexity BOUNDING_BOX, lighting model set to BASE_COLOR and drawing style LINES (no texture) with no depth comparison.
VIEW_SAME_AS_STILL - This only applies to INTERACTIVE draw type. It enables the interactive draw style mode to match the regular draw style mode without having to set it explicitly.
Reimplemented in SoXtFullViewer.
| void SoXtViewer::setFixedPercentage | ( | float | percent | ) |
Sets fixed percentage for the viewer to render (0.0 to 1.0) Default is 1.0.
The default value can be set using the environment variable OIV_DECIMATION_PERCENTAGE (0.0 to 1.0).
| void SoXtViewer::setFramesPerSecondCallback | ( | SoXtViewerFPSCB * | callback, | |
| void * | userData = NULL | |||
| ) |
Registers frames per second callback.
| void SoXtViewer::setGoalFramesPerSecond | ( | float | goal | ) |
Sets goal frames per second for the viewer to try to render.
Default is 8.0.
The default value can be set using the environment variable OIV_DECIMATION_GOAL_FPS.
| void SoXtViewer::setGoalNumberOfTriangles | ( | int32_t | goal | ) |
Sets goal number of triangles for the viewer to try to render.
Default is 10000.
The default value can be set using the environment variable OIV_DECIMATION_GOAL_NUM_OF_TRIANGLES.
| virtual void SoXtViewer::setHeadlight | ( | SbBool | onOrOff | ) | [virtual] |
Turns the headlight on/off (default on).
The default value can be set using the environment variable OIV_USE_HEADLIGHT (0 = FALSE, 1 = TRUE).
Reimplemented in SoXtFullViewer.
| void SoXtViewer::setNumSamples | ( | int | numFrames | ) |
Sets how many frames should be timed before frames per second callback is called, default is 10.
| void SoXtViewer::setPickRadius | ( | float | radius | ) |
Sets the pick radius, in pixels, used by the viewer for picking and seeking actions.
Effectively calls setRadius on the viewer's internal SoRayPickAction. The default is the SoRayPickAction default (5 pixels).
Specifying a radius of 0 may give better performance. In particular, some shapes like MoMeshSkin implement a fast GPU picking algorithm that can only be used when radius is 0.
| virtual void SoXtViewer::setPreserveCameraHeightAngle | ( | SbBool | flag | ) | [inline, virtual] |
If TRUE, an SoPerspectiveCamera's heightAngle is preserved if the camera is changed to an SoOrthographicCamera and then toggled back to an SoPerspectiveCamera.
Default is FALSE.
| virtual void SoXtViewer::setSceneGraph | ( | SoNode * | newScene | ) | [virtual] |
Sets the scene graph to render.
Whenever a new scene is supplied the first camera encountered will be by default used as the edited camera, else a new camera will be created. If the scene graph does not contain any light nodes, the viewer inserts a headlight (directional light which is made to follow the camera) immediately after the camera. See the main description of this class for further details.
Reimplemented from SoXtRenderArea.
| virtual void SoXtViewer::setSeekMode | ( | SbBool | onOrOff | ) | [virtual] |
Externally set the viewer into/out off seek mode (default OFF).
Actual seeking will not happen until the viewer decides to (ex: mouse click).
Note: setting the viewer out of seek mode while the camera is being animated will stop the animation to the current location.
Reimplemented in SoXtExaminerViewer, SoXtFlyViewer, SoXtPlaneViewer, and SoXtWalkViewer.
| void SoXtViewer::setSeekTime | ( | float | seconds | ) | [inline] |
Sets the time a seek takes to change to the new camera location.
A value of zero seeks directly to the point without any animation. Default value is 2 seconds.
For historical reasons, setting the seek time to zero causes the viewer to stay in seek mode. If you want the camera to move immediately to its new position and still have the viewer leave seek mode after moving the camera, set the seek time to a very small non-zero value.
The default value can be set using the environment variable OIV_SEEK_TIME.
| virtual void SoXtViewer::setStereoAbsoluteAdjustments | ( | SbBool | ) | [virtual] |
Specifies if stereo adjustments are absolute.
FALSE by default.
The default non-absolute mode allows the stereo settings to be valid over a range of different view volume settings. If you chose absolute mode, you are responsible for modifying the stereo settings (if necessary) when the view volume changes.
When absolute mode is TRUE, stereo offset and balance are used as follows for the right eye view:
StereoCameraOffset = getStereoAdjustment();
FrustumAsymmetry = getBalanceAdjustment();
glTranslated (-StereoCameraOffset, 0, 0);
glFrustum (FrustumLeft + FrustumAsymmetry, FrustumRight + FrustumAsymmetry,
FrustumBottom, FrustumTop, NearClipDistance, FarClipDistance);
The left eye view is symmetric.
When absolute mode is FALSE, stereo offset and balance are used as follows for the right eye view:
Xrange is right minus left (i.e., first two arguments of glFrustum) and multiply that difference by the ratio of the distance to the desired plane of zero parallax to the near clipping plane distance.
StereoCameraOffset = Xrange * 0.035 * getStereoAdjustment();
FrustumAsymmetry = -StereoCameraOffset * getBalanceAdjustment();
ZeroParallaxDistance = (NearClipDistance + FarClipDistance)/0.5;
FrustumAsymmetry *= NearClipDistance / ZeroParallaxDistance;
glTranslated (-StereoCameraOffset, 0, 0);
glFrustum (FrustumLeft + FrustumAsymmetry, FrustumRight + FrustumAsymmetry,
FrustumBottom, FrustumTop, NearClipDistance, FarClipDistance);
The left eye view is symmetric.
Not virtual pure for compatiblity reasons.
Reimplemented from SoStereoViewer.
| virtual void SoXtViewer::setStereoActive | ( | SbBool | activate | ) | [virtual] |
Sets stereo activation.
Default is FALSE. The default can be set using the OIV_STEREO_ACTIVE environment variable.
Implements SoStereoViewer.
| virtual void SoXtViewer::setStereoBalance | ( | float | balance, | |
| SbBool | nearFrac | |||
| ) | [virtual] |
Sets the stereo balance (the position of the zero parallax plane) and specifies whether the balance value is defined as a fraction of the camera near distance.
Note: Since the projection matrix always depends on the camera's near plane, in some cases it may be necessary to detect changes to the camera near plane and adjust by setting a new stereo balance value. Open Inventor will make these adjustments automatically if the nearFrac parameter is set to TRUE. In this case the stereo balance value is defined as a fraction of the camera near distance.
Default balance is 1.0. The default can be set using the OIV_STEREO_BALANCE environment variable. Default nearFrac is FALSE. The default can be set using the OIV_STEREO_BALANCE_NEAR_FRAC environment variable.
Implements SoStereoViewer.
| void SoXtViewer::setStereoOffset | ( | float | dist | ) | [virtual] |
| virtual void SoXtViewer::setStereoViewing | ( | SbBool | onOrOff | ) | [virtual] |
Turns stereo viewing on/off on the viewer (default off).
When in stereo mode, which may not work on all machines, the scene is rendered twice (in the left and right buffers) with an offset between the two views to simulate stereo viewing. Stereo glasses have to be used to see the effect. Stereo viewing is only possible with a graphics board that has support for stereo.
| void SoXtViewer::setStereoViewType | ( | SoBaseStereo * | stereoViewType | ) | [virtual] |
If stereoViewType is NULL, the stereo is inactivated (see setStereoActive).
Default is SoAnaglyphStereo with RED_CYAN color filter. The default can be set using the OIV_STEREO_TYPE environment variable.
Implements SoStereoViewer.
| virtual void SoXtViewer::setViewing | ( | SbBool | onOrOff | ) | [virtual] |
Sets whether the viewer is turned on or off.
When turned on, events are consumed by the viewer. When viewing is off, events are processed by the viewer's render area. This means events will be sent down to the scene graph for processing (i.e. picking can occur). Note that if the application has registered an event callback, it will be invoked on every message, whether viewing is turned on or not. However, the return value of this callback (which specifies whether the callback handled the event or not) is ignored when viewing is on. That is, the viewer will process the event even if the callback already did. This is to ensure that the viewing paradigm is not broken (default viewing is on).
Reimplemented in SoXtExaminerViewer, SoXtFlyViewer, SoXtFullViewer, SoXtPlaneViewer, and SoXtWalkViewer.
| void SoXtViewer::setViewport | ( | short | left, | |
| short | bottom, | |||
| short | width, | |||
| short | height | |||
| ) | [virtual] |
Sets viewport region with given origin (lower-left corner) and size, given as pixel coordinates.
Implements SoStereoViewer.
| virtual void SoXtViewer::toggleCameraType | ( | ) | [virtual] |
This routine will toggle the current camera from perspective to orthographic, and from orthographic back to perspective.
Note: It is not actually possible to "toggle" the type of a camera. In fact the current camera will be replaced by a new camera of the appropriate type. Of course the current camera node will be destroyed in the process unless it has been ref'd elsewhere.
| virtual void SoXtViewer::viewAll | ( | ) | [virtual] |
Changes the camera position to view the entire scene (the camera zoom or orientation isn't changed).
The viewer applies an SoGetBoundingBoxAction to the scene graph to get the bounding box of the entire scene. The bounding box will only include shapes that are actually traversed. For example the bounding box will not include shapes under an SoSwitch with whichChild set to SO_SWITCH_NONE. The action does not consider the visibility of shapes that are traversed. In other words the bounding box will include shapes that are invisible (SoDrawStyle), shapes that are clipped (SoClipPlane), etc. Use an SoBBox node to exclude shapes from the bounding box computation. Bounding boxes are automatically cached at SoSeparator nodes, so getting the bounding box is very fast when the scene graph has not been changed.
See all SoCamera::viewAll(). This method allows the application to adjust the camera based on a specific sub-graph or path in the scene graph.
Reimplemented in SoXtExaminerViewer.
The documentation for this class was generated from the following file:
- Inventor/Xt/viewers/SoXtViewer.h