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SoWinViewer Class Reference

The SoWinViewer class is the top level base viewer class. More...

#include <Inventor/Win/viewers/SoWinViewer.h>

Inheritance diagram for SoWinViewer:
SoWinRenderArea SoWinGLWidget SoWinComponent SoWinObject SoWinFullViewer SoWinConstrainedViewer SoWinExaminerViewer SoWinPlaneViewer SoWinFlyViewer

Public Types

enum  Type { BROWSER, EDITOR }
 
enum  DrawStyle {
  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, VIEW_SAME_AS_STILL, VIEW_WIREFRAME_OVERLAY
}
 
enum  DrawType { STILL = 0, INTERACTIVE }
 
enum  BufferType { BUFFER_SINGLE, BUFFER_DOUBLE, BUFFER_INTERACTIVE }
 
enum  AutoClippingStrategy { VARIABLE_NEAR_PLANE, CONSTANT_NEAR_PLANE }
 
enum  StereoType {
  STEREO_NONE, STEREO_ANAGLYPH, STEREO_QUADBUFFER, STEREO_INTERLEAVED_ROWS,
  STEREO_INTERLEAVED_COLUMNS
}
 

Public Member Functions

virtual void setCamera (SoCamera *camera)
 
SoCameragetCamera (void) const
 
virtual void setCameraType (SoType type)
 
SoType getCameraType (void) const
 
virtual void toggleCameraType (void)
 
virtual void viewAll (void)
 
virtual void saveHomePosition (void)
 
virtual void resetToHomePosition (void)
 
virtual void setHeadlight (SbBool enable)
 
SbBool isHeadlight (void) const
 
SoDirectionalLightgetHeadlight (void) const
 
virtual void setDrawStyle (SoWinViewer::DrawType type, SoWinViewer::DrawStyle style)
 
SoWinViewer::DrawStyle getDrawStyle (const SoWinViewer::DrawType type) const
 
virtual void setBufferingType (SoWinViewer::BufferType type)
 
SoWinViewer::BufferType getBufferingType (void) const
 
virtual void setViewing (SbBool enable)
 
SbBool isViewing (void) const
 
virtual void setCursorEnabled (SbBool enable)
 
SbBool isCursorEnabled (void) const
 
void setAutoClipping (SbBool enable)
 
SbBool isAutoClipping (void) const
 
void setAutoClippingStrategy (const AutoClippingStrategy strategy, const float value=0.6f, SoWinAutoClippingCB *cb=NULL, void *cbuserdata=NULL)
 
virtual void setStereoViewing (SbBool enable)
 
SbBool isStereoViewing (void) const
 
virtual void setStereoOffset (const float dist)
 
float getStereoOffset (void) const
 
SbBool setStereoType (SoWinViewer::StereoType s)
 
SoWinViewer::StereoType getStereoType (void) const
 
void setAnaglyphStereoColorMasks (const SbBool left[3], const SbBool right[3])
 
void getAnaglyphStereoColorMasks (SbBool left[3], SbBool right[3])
 
void setDetailSeek (const SbBool enable)
 
SbBool isDetailSeek (void) const
 
void setSeekTime (const float seconds)
 
float getSeekTime (void) const
 
void addStartCallback (SoWinViewerCB *func, void *data=NULL)
 
void addFinishCallback (SoWinViewerCB *func, void *data=NULL)
 
void removeStartCallback (SoWinViewerCB *func, void *data=NULL)
 
void removeFinishCallback (SoWinViewerCB *func, void *data=NULL)
 
void setWireframeOverlayColor (const SbColor &color)
 
const SbColorgetWireframeOverlayColor (void) const
 
virtual void setDoubleBuffer (const SbBool enable)
 
virtual void setSceneGraph (SoNode *root)
 
virtual SoNodegetSceneGraph (void)
 
- Public Member Functions inherited from SoWinRenderArea
 SoWinRenderArea (HWND parent=NULL, const char *name=NULL, SbBool embed=TRUE, SbBool mouseInput=TRUE, SbBool keyboardInput=TRUE)
 
 ~SoWinRenderArea ()
 
void setOverlaySceneGraph (SoNode *scene)
 
SoNodegetOverlaySceneGraph (void)
 
void setBackgroundColor (const SbColor &color)
 
const SbColorgetBackgroundColor (void) const
 
void setBackgroundIndex (int idx)
 
int getBackgroundIndex (void) const
 
void setOverlayBackgroundIndex (int idx)
 
int getOverlayBackgroundIndex (void) const
 
void setColorMap (int start, int num, const SbColor *colors)
 
void setOverlayColorMap (int start, int num, const SbColor *colors)
 
void setViewportRegion (const SbViewportRegion &newRegion)
 
const SbViewportRegiongetViewportRegion (void) const
 
void setTransparencyType (SoGLRenderAction::TransparencyType type)
 
SoGLRenderAction::TransparencyType getTransparencyType (void) const
 
void setAntialiasing (SbBool smoothing, int numPasses)
 
void getAntialiasing (SbBool &smoothing, int &numPasses) const
 
void setClearBeforeRender (SbBool enable, SbBool zbEnable=TRUE)
 
SbBool isClearBeforeRender (void) const
 
SbBool isClearZBufferBeforeRender (void) const
 
void setClearBeforeOverlayRender (SbBool enable)
 
SbBool isClearBeforeOverlayRender (void) const
 
void setAutoRedraw (SbBool enable)
 
SbBool isAutoRedraw (void) const
 
void setRedrawPriority (uint32_t priority)
 
uint32_t getRedrawPriority (void) const
 
void render (void)
 
void renderOverlay (void)
 
void scheduleRedraw (void)
 
void scheduleOverlayRedraw (void)
 
void redrawOnSelectionChange (SoSelection *selection)
 
void redrawOverlayOnSelectionChange (SoSelection *selection)
 
void setEventCallback (SoWinRenderAreaEventCB *func, void *user=NULL)
 
void setSceneManager (SoSceneManager *manager)
 
SoSceneManagergetSceneManager (void) const
 
void setOverlaySceneManager (SoSceneManager *manager)
 
SoSceneManagergetOverlaySceneManager (void) const
 
void setGLRenderAction (SoGLRenderAction *action)
 
SoGLRenderActiongetGLRenderAction (void) const
 
void setOverlayGLRenderAction (SoGLRenderAction *action)
 
SoGLRenderActiongetOverlayGLRenderAction (void) const
 
SbBool sendSoEvent (const SoEvent *event)
 
void registerDevice (SoWinDevice *device)
 
void unregisterDevice (SoWinDevice *device)
 
- Public Member Functions inherited from SoWinGLWidget
void setBorder (const SbBool enable)
 
SbBool isBorder (void) const
 
SbBool isDoubleBuffer (void) const
 
void setDrawToFrontBufferEnable (const SbBool enable)
 
SbBool isDrawToFrontBufferEnable (void) const
 
void setQuadBufferStereo (const SbBool enable)
 
SbBool isQuadBufferStereo (void) const
 
void setAccumulationBuffer (const SbBool enable)
 
SbBool getAccumulationBuffer (void) const
 
void setStencilBuffer (const SbBool enable)
 
SbBool getStencilBuffer (void) const
 
void setAlphaChannel (const SbBool enable)
 
SbBool getAlphaChannel (void) const
 
void setOverlayRender (const SbBool onoff)
 
SbBool isOverlayRender (void) const
 
void setSampleBuffers (const int numsamples)
 
int getSampleBuffers (void) const
 
void setStealFocus (SbBool enable)
 
SbBool isStealFocus (void) const
 
HWND getGLWidget (void) const
 
HWND getNormalWidget (void) const
 
HWND getOverlayWidget (void) const
 
SbBool hasOverlayGLArea (void) const
 
SbBool hasNormalGLArea (void) const
 
unsigned long getOverlayTransparentPixel (void)
 
void getPointSizeLimits (SbVec2f &range, float &granularity)
 
void getLineWidthLimits (SbVec2f &range, float &granularity)
 
- Public Member Functions inherited from SoWinComponent
virtual ~SoWinComponent ()
 
virtual void show (void)
 
virtual void hide (void)
 
virtual void setComponentCursor (const SoWinCursor &cursor)
 
SbBool isFullScreen (void) const
 
SbBool setFullScreen (const SbBool onoff)
 
SbBool isVisible (void)
 
SbBool isTopLevelShell (void) const
 
HWND getWidget (void) const
 
HWND getBaseWidget (void) const
 
HWND getShellWidget (void) const
 
HWND getParentWidget (void) const
 
void setSize (const SbVec2s size)
 
SbVec2s getSize (void) const
 
void setTitle (const char *const title)
 
const char * getTitle (void) const
 
void setIconTitle (const char *const title)
 
const char * getIconTitle (void) const
 
const char * getWidgetName (void) const
 
const char * getClassName (void) const
 
void setWindowCloseCallback (SoWinComponentCB *const func, void *const user=NULL)
 
- Public Member Functions inherited from SoWinObject
virtual SoType getTypeId (void) const =0
 
SbBool isOfType (SoType type) const
 

Protected Member Functions

 SoWinViewer (HWND parent, const char *name, SbBool embed, Type type, SbBool build)
 
 ~SoWinViewer ()
 
virtual void sizeChanged (const SbVec2s &size)
 
virtual void setSeekMode (SbBool enable)
 
SbBool isSeekMode (void) const
 
SbBool seekToPoint (const SbVec2s screenpos)
 
void seekToPoint (const SbVec3f &scenepos)
 
virtual void computeSeekFinalOrientation (void)
 
virtual void actualRedraw (void)
 
virtual SbBool processSoEvent (const SoEvent *const event)
 
void interactiveCountInc (void)
 
void interactiveCountDec (void)
 
int getInteractiveCount (void) const
 
void setSeekDistance (const float distance)
 
float getSeekDistance (void) const
 
void setSeekValueAsPercentage (const SbBool on)
 
SbBool isSeekValuePercentage (void) const
 
virtual void changeCameraValues (SoCamera *camera)
 
void addSuperimposition (SoNode *scene)
 
void removeSuperimposition (SoNode *scene)
 
void setSuperimpositionEnabled (SoNode *scene, const SbBool enable)
 
SbBool getSuperimpositionEnabled (SoNode *scene) const
 
- Protected Member Functions inherited from SoWinRenderArea
 SoWinRenderArea (HWND parent, const char *name, SbBool embed, SbBool mouseInput, SbBool keyboardInput, SbBool build)
 
virtual void redraw (void)
 
virtual void redrawOverlay (void)
 
virtual void actualOverlayRedraw (void)
 
virtual void processEvent (MSG *event)
 
virtual void initGraphic (void)
 
virtual void initOverlayGraphic (void)
 
virtual void widgetChanged (HWND widget)
 
virtual void afterRealizeHook (void)
 
HWND buildWidget (HWND parent)
 
virtual const char * getDefaultWidgetName (void) const
 
virtual const char * getDefaultTitle (void) const
 
virtual const char * getDefaultIconTitle (void) const
 
virtual SbBool glScheduleRedraw (void)
 
- Protected Member Functions inherited from SoWinGLWidget
 SoWinGLWidget (HWND const parent=NULL, const char *const name=NULL, const SbBool embed=TRUE, const int glmodes=SO_GL_RGB, const SbBool build=TRUE)
 
 ~SoWinGLWidget ()
 
HWND buildWidget (HWND parent)
 
void setGLSize (const SbVec2s size)
 
SbVec2s getGLSize (void) const
 
float getGLAspectRatio (void) const
 
void setGlxSize (const SbVec2s size)
 
SbVec2s getGlxSize (void) const
 
float getGlxAspectRatio (void) const
 
void setStereoBuffer (SbBool flag)
 
SbBool isStereoBuffer (void) const
 
SbBool isRGBMode (void)
 
void glLockNormal (void)
 
void glUnlockNormal (void)
 
void glLockOverlay (void)
 
void glUnlockOverlay (void)
 
void glSwapBuffers (void)
 
void glFlushBuffer (void)
 
- Protected Member Functions inherited from SoWinComponent
 SoWinComponent (HWND const parent=NULL, const char *const name=NULL, const SbBool embed=TRUE)
 
void setClassName (const char *const name)
 
void setBaseWidget (HWND widget)
 
void registerWidget (HWND widget)
 
void unregisterWidget (HWND widget)
 
void addVisibilityChangeCallback (SoWinComponentVisibilityCB *const func, void *const user=NULL)
 
void removeVisibilityChangeCallback (SoWinComponentVisibilityCB *const func, void *const user=NULL)
 

Additional Inherited Members

- Static Public Member Functions inherited from SoWinRenderArea
static uint32_t getDefaultRedrawPriority (void)
 
- Static Public Member Functions inherited from SoWinComponent
static void setWidgetCursor (HWND w, const SoWinCursor &cursor)
 
static SoWinComponentgetComponent (HWND widget)
 
static void initClasses (void)
 
- Static Public Member Functions inherited from SoWinObject
static void initClass (void)
 
static SoType getClassTypeId (void)
 
static void init (void)
 
- Protected Attributes inherited from SoWinGLWidget
SbBool waitForExpose
 
SbBool drawToFrontBuffer
 
- Protected Attributes inherited from SoWinComponent
SbBool firstRealize
 

Detailed Description

The SoWinViewer class is the top level base viewer class.

This is an abstract class, which adds the following features to it's SoWinRenderArea superclass: convenient methods for camera handling, an automatic headlight configuration.

As for the camera handling: when setting a new scenegraph for the viewer, the scenegraph will automatically be scanned for a node derived from SoCamera. If not found, the viewer will itself set up a camera for the scene. The camera can then be conveniently controlled by the application programmers in many aspects:

Note that there is no dragger or manipulator attached to the scene camera. The camera transform manipulation is calculated in a more direct manner in the non-abstract viewer classes inheriting SoWinViewer by reading mouse and keyboard events and interpreting how these should influence the camera. The calculations results in new values for SoCamera::position, SoCamera::orientation, and the other SoCamera field values for the camera designated to be the viewer viewpoint camera. These values are then inserted directly into the viewer's SoCamera node.

See e.g. the source code for SoWinExaminerViewer::processSoEvent() for the details.

The SoWinViewer class automatically adds a headlight to the scene, which will always point in the approximate same direction as the current viewer camera, thereby securing that the scene geometry is always lighted and visible. (If you don't want the constant headlight, but rather want to light the scene on your own, this behavior can be turned off with SoWinViewer::setHeadlight()).

SoWinViewer-derived viewers all inherit the following keyboard controls from this class (but only when the viewer is in "examine mode", ie SoWinViewer::isViewing() returns TRUE):

  • "s": put the viewer in "seek mode", where the end user may click anywhere on scene geometry to trigger an animation which moves the camera towards the point clicked

  • "Home": hit this key to move camera back to last saved "home position"

  • arrow keys: moves camera slightly left, right, up or down

  • "q": exit application

Member Enumeration Documentation

◆ Type

Hints about what context the viewer will be used in. Usually not very interesting for the application programmer, it doesn't matter much which value is used for the viewer type. This "feature" of the viewer is included just to be compatible with the old SGI Inventor API.

Enumerator
BROWSER 

If a user-supplied scenegraph passed into the setSceneGraph() function does not contain a camera, setting the viewer type to BROWSER will make the viewer in that case automatically set up a camera outside the scene, as part of the viewer's private and hidden "supergraph".

EDITOR 

If a user-supplied scenegraph passed into the setSceneGraph() function does not contain a camera, setting the viewer type to EDITOR will make the viewer in that case automatically set up a camera in the user-supplied scene.

So if you want to avoid having the SoWinViewer class muck about with your supplied scenegraph, set the type-flag to SoWinViewer::BROWSER instead, which makes an inserted camera node go into the viewer's own "wrapper" scene graph instead.

◆ DrawStyle

Decides drawstyle for a scene with either a still camera or an animating camera.

See also
SoWinViewer::setDrawStyle(), SoWinViewer::DrawType
Enumerator
VIEW_AS_IS 

Normal rendering, draws all scene geometry in it's original style.

VIEW_HIDDEN_LINE 

Draw scene in "hidden line" mode: that is, as wireframe with no "see-through".

Note that this is actually an expensive way to render, as the scene must be rendered twice to achieve the effect of hiding lines behind the invisible geometry.

VIEW_NO_TEXTURE 

Render scene without textures.

VIEW_LOW_COMPLEXITY 

Render all "complex" shape types with low complexity to improve rendering performance.

"Complex shapes" in this context includes spheres, cones, cylinder, NURBS surfaces, and others which are tesselated to polygons before being rendered.

VIEW_LINE 

View all polygon geometry in wireframe mode.

VIEW_POINT 

Render only the vertex positions of the geometry.

VIEW_BBOX 

View the scene's bounding boxes, instead of rendering the full geometry.

A very efficient way of optimizing rendering performance for scenes with high primitive counts while moving the camera about is to set this mode for the SoWinViewer::INTERACTIVE DrawType.

VIEW_LOW_RES_LINE 

Render as wireframe and don't bother with getting them rendered correctly in depth.

VIEW_LOW_RES_POINT 

Render as vertex points and don't bother with getting them rendered correctly in depth.

VIEW_SAME_AS_STILL 

Always render a scene with an animating camera (ie SoWinViewer::INTERACTIVE DrawType) in the same manner as scene with a still camera.

VIEW_WIREFRAME_OVERLAY 

Render the scene as normal, but overlay a set of lines showing the contours of all polygons.

◆ DrawType

Contains valid values for the first argument to the SoWinViewer::setDrawStyle() call. Decides the effect of the second argument.

See also
SoWinViewer::setDrawStyle(), SoWinViewer::DrawStyle
Enumerator
STILL 

If this value is passed as the first argument of SoWinViewer::setDrawStyle(), the second argument decides which draw style to use when the viewer camera is standing still in the same position with the same orientation – i.e. when the end user is not interacting with the scene camera.

INTERACTIVE 

If this value is passed as the first argument of SoWinViewer::setDrawStyle(), the second argument decides which draw style to use when the end user is interacting with the scene camera, causing continuous animation redraws.

◆ BufferType

Set of valid values for SoWinViewer::setBufferingType().

Enumerator
BUFFER_SINGLE 

Change underlying OpenGL canvas to be single-buffered.

BUFFER_DOUBLE 

Change underlying OpenGL canvas to be double-buffered.

BUFFER_INTERACTIVE 

Set up so animation rendering is done in a double-buffered OpenGL canvas, but ordinary rendering happens directly in the front-buffer.

This mode can be useful with absurdly large scenes, as the rendering will visibly progress, and one will avoid having the end user wonder why nothing is happening while the scene is rendered to the back buffer in the default SoWinViewer::BUFFER_DOUBLE mode.

◆ AutoClippingStrategy

Enum for auto clipping strategy.

See also
setAutoClippingStrategy()
Enumerator
VARIABLE_NEAR_PLANE 

Variable near plane auto clipping strategy. Explained in detail in the documentation for the SoWinViewer::setAutoClippingStrategy() method.

CONSTANT_NEAR_PLANE 

Constant near plane auto clipping strategy. Explained in detail in the documentation for the SoWinViewer::setAutoClippingStrategy() method.

◆ StereoType

Contains list of supported stereo rendering techniques.

See also
SoWinViewer::setStereoType()
Enumerator
STEREO_NONE 

Use monoscopic rendering.

STEREO_ANAGLYPH 

Render stereo by superimposing two images of the same scene, but with different color filters over the left and right view (or "eye").

This is a way of rendering stereo which works on any display, using color-filter glasses. Such glasses are usually cheap and easy to come by.

See also
setAnaglyphStereoColorMasks()
STEREO_QUADBUFFER 

Render stereo by using OpenGL quad-buffers. This is the most common interface for stereo rendering for more expensive hardware devices, such as shutter glasses and polarized glasses.

The well known Crystal Eyes glasses are commonly used with this type of stereo display.

STEREO_INTERLEAVED_ROWS 

Interleaving / interlacing rows from the left and right eye is another stereo rendering method requiring special hardware. One example of a provider of shutter glasses working with interleaved glasses is VRex:

http://www.vrex.com/

STEREO_INTERLEAVED_COLUMNS 

Same basic technique as SoWinViewer::STEREO_INTERLEAVED_ROWS, only it is vertical lines that are interleaved / interlaced, instead of horizontal lines.

Constructor & Destructor Documentation

◆ SoWinViewer()

SoWinViewer::SoWinViewer ( HWND  parent,
const char *  name,
SbBool  embed,
SoWinViewer::Type  t,
SbBool  build 
)
protected

Constructor. parent, name and embed are passed on to SoWinRenderArea, so see the documentation for our parent constructor for for more information on those.

The t type setting hints about what context the viewer will be used in. Usually not very interesting for the application programmer, but if you want to make sure the SoWinViewer class doesn't muck about with your supplied scenegraph, set the type-flag to SoWinViewer::BROWSER. (This "feature" of the viewer is included just to be compatible with the old SGI Inventor API.)

The build flag decides whether or not to delay building the widgets / window which is going to make up the components of the viewer.

◆ ~SoWinViewer()

SoWinViewer::~SoWinViewer ( )
protected

Destructor.

Member Function Documentation

◆ setCamera()

void SoWinViewer::setCamera ( SoCamera cam)
virtual

Set the camera we want the viewer to manipulate when interacting with the viewer controls.

The camera passed in as an argument to this method must already be part of the viewer's scenegraph. You do not inject viewpoint cameras to the viewer with this method.

You should rather insert a camera into the scene graph first (if necessary, often one will be present already), then register it as the camera used by the viewer controls with this method.

If the application code doesn't explicitly set up a camera through this method, the viewer will automatically scan through the scenegraph to find a camera to use. If no camera is available in the scenegraph at all, it will set up it's own camera.

See also
getCamera()

Reimplemented in SoWinExaminerViewer, SoWinFlyViewer, SoWinPlaneViewer, and SoWinConstrainedViewer.

◆ getCamera()

SoCamera * SoWinViewer::getCamera ( void  ) const

Returns the camera currently used by the viewer for the user's main viewpoint.

It is possible that this function returns NULL, for instance if there's no scenegraph present in the viewer. (This is mostly meant as a note for developers extending the SoWin library, as application programmers usually controls if and when a viewer contains a scenegraph, and therefore know in advance if this method will return a valid camera pointer.)

See also
setCamera()

◆ setCameraType()

void SoWinViewer::setCameraType ( SoType  t)
virtual

When the viewer has to make its own camera as a result of the graph passed to setSceneGraph() not containing any camera nodes, this call can be made in advance to decide which type the camera will be of.

Default is to use an SoPerspectiveCamera.

If this method is called when there is a scene graph and a camera already set up, it will delete the old camera and set up a camera with the new type if the t type is different from that of the current camera.

See also
getCameraType()

Reimplemented in SoWinFlyViewer.

◆ getCameraType()

SoType SoWinViewer::getCameraType ( void  ) const

Returns camera type which will be used when the viewer has to make its own camera.

Note that this call does not return the current cameratype, as one might expect. Use getCamera() and SoType::getTypeId() for that inquiry.

See also
setCameraType()

◆ toggleCameraType()

void SoWinViewer::toggleCameraType ( void  )
virtual

If the current camera is of perspective type, switch to orthographic, and vice versa.

Automatically calls SoWinViewer::setCameraType() so the change will immediately take place.

◆ viewAll()

void SoWinViewer::viewAll ( void  )
virtual

Reposition the current camera so we can see the complete scene.

Reimplemented in SoWinFlyViewer.

◆ saveHomePosition()

void SoWinViewer::saveHomePosition ( void  )
virtual

Store the current camera settings for later retrieval with resetToHomePosition().

See also
resetToHomePosition()

Reimplemented in SoWinConstrainedViewer.

◆ resetToHomePosition()

void SoWinViewer::resetToHomePosition ( void  )
virtual

Restore the saved camera settings.

See also
saveHomePosition()

Reimplemented in SoWinFlyViewer, and SoWinConstrainedViewer.

◆ setHeadlight()

void SoWinViewer::setHeadlight ( SbBool  on)
virtual

Turn the camera headlight on or off.

Default is to have a headlight turned on.

See also
isHeadlight(), getHeadlight()

◆ isHeadlight()

SbBool SoWinViewer::isHeadlight ( void  ) const

Returns status of the viewer headlight, whether it is on or off.

See also
setHeadlight(), getHeadlight()

◆ getHeadlight()

SoDirectionalLight * SoWinViewer::getHeadlight ( void  ) const

Returns the a pointer to the directional light node which is the viewer headlight.

The fields of the node is available for user editing.

See also
isHeadlight(), setHeadlight()

◆ setDrawStyle()

void SoWinViewer::setDrawStyle ( SoWinViewer::DrawType  type,
SoWinViewer::DrawStyle  style 
)
virtual

Set up a drawing style. The type argument specifies if the given style should be interpreted as the drawstyle during animation or when the camera is static.

Default values for the drawing style is to render the scene "as is" in both still mode and while the camera is moving.

See the documentation for the DrawType and DrawStyle for more information.

See also
getDrawStyle()

◆ getDrawStyle()

SoWinViewer::DrawStyle SoWinViewer::getDrawStyle ( const SoWinViewer::DrawType  type) const

Return current drawstyles for the given type (STILL or INTERACTIVE).

See also
setDrawStyle()

◆ setBufferingType()

void SoWinViewer::setBufferingType ( SoWinViewer::BufferType  type)
virtual

Set the viewer's buffer type. Available types are SoWinViewer::BUFFER_SINGLE, SoWinViewer::BUFFER_DOUBLE and SoWinViewer::BUFFER_INTERACTIVE.

(With a buffer type of SoWinViewer::BUFFER_INTERACTIVE, the viewer will render with doublebuffering during user interaction and with single buffering otherwise.)

Default is SoWinViewer::BUFFER_DOUBLE.

See also
getBufferingType()

◆ getBufferingType()

SoWinViewer::BufferType SoWinViewer::getBufferingType ( void  ) const

Return the viewer's buffer type.

See also
setBufferingType()

◆ setViewing()

void SoWinViewer::setViewing ( SbBool  enable)
virtual

Set view mode.

If the view mode is on, user events will be caught and used to influence the camera position / orientation. If view mode is off, all events in the viewer canvas (like for instance keypresses or mouseclicks and -movements) will be passed along to the scene graph.

Default is to have the view mode active.

See also
isViewing()

Reimplemented in SoWinExaminerViewer, SoWinFullViewer, SoWinFlyViewer, and SoWinPlaneViewer.

◆ isViewing()

SbBool SoWinViewer::isViewing ( void  ) const

Return state of view mode.

TRUE means that the mode of the viewer is set such that user interaction with the mouse is used to modify the position and orientation of the camera.

See also
setViewing()

◆ setCursorEnabled()

void SoWinViewer::setCursorEnabled ( SbBool  on)
virtual

Set whether or not the mouse cursor representation should be visible in the viewer canvas.

Default value is on.

See also
isCursorEnabled()

Reimplemented in SoWinExaminerViewer, SoWinFlyViewer, and SoWinPlaneViewer.

◆ isCursorEnabled()

SbBool SoWinViewer::isCursorEnabled ( void  ) const

Returns visibility status of mouse cursor.

See also
setCursorEnabled()

◆ setAutoClipping()

void SoWinViewer::setAutoClipping ( SbBool  enable)

Turn on or off continuous automatic adjustments of the near and far clipping planes.

If on, the distance from the camera position to the near and far planes will be calculated to be a "best fit" around the geometry in the scene, to maximize the "stretch" of values for the visible geometry in the z-buffer. This is important, as z-buffer resolution is usually limited enough that one will quickly see flickering in the rasterization of close polygons upon lousy utilization of the z-buffer.

Automatic calculations of near and far clip planes are on as default.

For better control over what happens in boundary conditions (for instance when the distance between near and far planes get very far, or if geometry gets very close to the camera position), it is possible to use the SoWinViewer::setAutoClippingStrategy() method to fine-tune the near/far clipping plane settings.

On a major note, be aware that turning auto-updating of near and far clip planes off have a potentially serious detrimental effect on performance, due to an important side effect: updating the near and far clip planes triggers an SoGetBoundingBoxAction to traverse the scene graph, which causes bounding boxes to be calculated and stored in caches. The bounding box caches are then used by the SoGLRenderAction traversal for view frustum culling operations. With no bounding box caches, the rendering will not do culling, which can cause much worse performance. Kongsberg Oil & Gas Technologies are working on correcting this problem properly from within the Coin library.

On a minor note, be aware that notifications will be temporarily turned off for the scene's SoCamera when changing the near and far clipping planes (which is done right before each redraw). This is done to avoid notifications being sent through the scene graph right before rendering, as that causes some latency. It is mentioned here in case you have any client code which for some reason needs to sense all changes to the scene camera. This is however unlikely, so you can very probably ignore this.

See also
getAutoClipping()

◆ isAutoClipping()

SbBool SoWinViewer::isAutoClipping ( void  ) const

Return value of the automatic near/far clipplane adjustment indicator.

See also
setAutoClipping()

◆ setAutoClippingStrategy()

void SoWinViewer::setAutoClippingStrategy ( const AutoClippingStrategy  strategy,
const float  value = 0.6f,
SoWinAutoClippingCB *  cb = NULL,
void *  cbuserdata = NULL 
)

Set the strategy used for automatic updates of the distances to the near and far clipping planes.

When auto clipping is enabled, the near plane distance is calculated so that it is just in front of the scene bounding box. If this near plane is behind or very close to the projection point, one of the following strategies will be used to calculate the new clipping plane.

The VARIABLE_NEAR_PLANE strategy considers the number of z buffer bits available for the current OpenGL context, and uses value to calculate the number of bits that is lost because of the far/near ratio. value should be in the range [0.0, 1.0]. A higher value will increase the z-buffer precision, but also push the near plane further away from the projection point.

The CONSTANT_NEAR_PLANE strategy simply sets the near plane to value. If value at some point approaches the far clipping plane distance, the near plane distance will be set to far plane distance divided by 5000.0.

The default strategy is VARIABLE_NEAR_PLANE.

It is also possible to register a callback method cb, which will then be invoked after the near and far clipping planes has been calculated by the SoWinViewer code. The callback can then adjust the values for the distance to the near and far planes to exactly match the needs of the application (for instance at specific parts in the scene), to limit the distance to either plane, or whatever else needs to be controlled.

The signature of the SoWinAutoClippingCB callback must match:

SbVec2f myfunc(void * data, const SbVec2f & nearfar);

The first argument is the cbuserdata passed in along with the callback function pointer itself (ie the callback function's closure). The second argument is the near and far clipping plane distances from the camera position, as calculated internally by the viewer, including "slack".

The function callback can then modify the near and far clipping plane distances to what will actually be used by the viewer. These values will then be used unmodified for the viewer's camera.

This is a good way of dynamically modifying the near and far distances such that they at all times exactly matches the specific layout of the application scene, for instance with regard to the trade-off between z-buffer resolution and how early geometry is clipped at the near plane (or at the far plane).

Note that the internal near/far calculations should be good enough for the vast majority of scenes. Application programmers should only need to set up their own adjustments upon "unusual" scenes, like for instance scenes with a large world space, but where one would still like to be able to get up extremely close on details in some parts of the scene.

See also
setAutoClipping()

◆ setStereoViewing()

void SoWinViewer::setStereoViewing ( SbBool  enable)
virtual

Turn stereo viewing on or off.

Note: this function is being obsoleted, you should use the setStereoType() function instead.

Coin does "correct" stereo rendering, using the method known as "parallel axis asymmetric frustum perspective projection". For more information, see this link:

http://astronomy.swin.edu.au/~pbourke/opengl/stereogl/

See also
isStereoViewing(), setStereoType()

◆ isStereoViewing()

SbBool SoWinViewer::isStereoViewing ( void  ) const

Returns a boolean indicating whether or not we're in stereo viewing mode.

NOTE: in the original InventorXt API, this method was virtual. It is not virtual here.

See also
setStereoViewing(), getStereoType()

◆ setStereoOffset()

void SoWinViewer::setStereoOffset ( const float  dist)
virtual

Set the offset between the two viewpoints when in stereo mode. Default value is 0.1.

NOTE: In the original InventorXt API, this method was not virtual.

See also
getStereoOffset()

◆ getStereoOffset()

float SoWinViewer::getStereoOffset ( void  ) const

Return the offset distance between the two viewpoints when in stereo mode.

See also
setStereoOffset()

◆ setStereoType()

SbBool SoWinViewer::setStereoType ( SoWinViewer::StereoType  s)

Set up stereo rendering.

Coin does "correct" stereo rendering, using the method known as "parallel axis asymmetric frustum perspective projection". For more information, see this link:

http://astronomy.swin.edu.au/~pbourke/opengl/stereogl/

Note: it is prefered that one uses this function for control of which type of stereo rendering to use, instead of the older SoWinViewer::setStereoViewing() and SoWinGLWidget::setQuadBufferStereo() functions.

The default is to do monoscopic rendering, i.e. the default SoWinViewer::StereoType value is SoWinViewer::STEREO_NONE.

See also
SoWinViewer::StereoType, SoCamera::setStereoAdjustment
Since
SoWin 1.2

◆ getStereoType()

SoWinViewer::StereoType SoWinViewer::getStereoType ( void  ) const

Returns the current type of stereo rendering used (or SoWinViewer::STEREO_NONE if monoscopic).

◆ setAnaglyphStereoColorMasks()

void SoWinViewer::setAnaglyphStereoColorMasks ( const SbBool  left[3],
const SbBool  right[3] 
)

If display is configured to render in anaglyph stereo, this function can be used to control which filter is used for each eye.

The default filters are red (i.e. color vector [TRUE,FALSE,FALSE]) for the left eye, and cyan (color vector [FALSE,TRUE,TRUE]) for the right eye.

See also
SoWinViewer::StereoType, setStereoType()

◆ getAnaglyphStereoColorMasks()

void SoWinViewer::getAnaglyphStereoColorMasks ( SbBool  left[3],
SbBool  right[3] 
)

Returns color masks for left and right eye filters in anaglyph stereo.

See also
setAnaglyphStereoColorMasks()

◆ setDetailSeek()

void SoWinViewer::setDetailSeek ( const SbBool  on)

Toggle between seeking to a point or seeking to an object.

Default is to seek to a point.

See also
isDetailSeek()

◆ isDetailSeek()

SbBool SoWinViewer::isDetailSeek ( void  ) const

Returns a value indicating whether or not seeks will be performed to the exact point of picking or just towards the picked object.

See also
setDetailSeek()

◆ setSeekTime()

void SoWinViewer::setSeekTime ( const float  seconds)

Set the duration of animating the camera repositioning after a successful seek. Call with seconds equal to 0.0 to make the camera jump immediately to the correct spot.

Default value is 2 seconds.

See also
getSeekTime()

◆ getSeekTime()

float SoWinViewer::getSeekTime ( void  ) const

Returns the camera repositioning duration following a seek action.

See also
setSeekTime()

◆ addStartCallback()

void SoWinViewer::addStartCallback ( SoWinViewerCB *  func,
void *  data = NULL 
)

Add a function to call when user interaction with the scene starts.

See also
removeStartCallback(), addFinishCallback()

◆ addFinishCallback()

void SoWinViewer::addFinishCallback ( SoWinViewerCB *  func,
void *  data = NULL 
)

Add a function to call when user interaction with the scene ends.

See also
removeFinishCallback(), addStartCallback()

◆ removeStartCallback()

void SoWinViewer::removeStartCallback ( SoWinViewerCB *  func,
void *  data = NULL 
)

Remove one of the functions which has been set up to be called when user interaction with the scene starts.

See also
addStartCallback(), removeFinishCallback()

◆ removeFinishCallback()

void SoWinViewer::removeFinishCallback ( SoWinViewerCB *  func,
void *  data = NULL 
)

Remove one of the functions which has been set up to be called when user interaction with the scene ends.

See also
addFinishCallback(), removeStartCallback()

◆ setWireframeOverlayColor()

void SoWinViewer::setWireframeOverlayColor ( const SbColor color)

Set the color of the overlay wireframe to color.

See also
getWireframeOverlayColor()

◆ getWireframeOverlayColor()

const SbColor & SoWinViewer::getWireframeOverlayColor ( void  ) const

Returns the current color of the overlay wireframe. The default color is [1,0,0], ie pure red.

See also
setWireframeOverlayColor()

◆ setDoubleBuffer()

void SoWinViewer::setDoubleBuffer ( const SbBool  on)
virtual

Overloaded to update the local bufferingtype variable.

See also
setBufferingType(), getBufferingType()

Reimplemented from SoWinGLWidget.

◆ setSceneGraph()

void SoWinViewer::setSceneGraph ( SoNode root)
virtual

Give the viewer a scenegraph to render and interact with. Overridden from parent class so the viewer can add it's own nodes to control rendering in different styles, rendering with a headlight, etc.

The root node will be inserted under the viewer's root node, which also covers the nodes necessary to implement the different preferences drawing style settings.

If no camera is part of the scene graph under root, one will automatically be instantiated and added. You can get a reference to this camera by using the SoWinViewer::getCamera() method.

See also
getSceneGraph(), setCameraType()

Reimplemented from SoWinRenderArea.

◆ getSceneGraph()

SoNode * SoWinViewer::getSceneGraph ( void  )
virtual

This method returns a reference to the scene graph root node as set by the user.

See also
SoWinRenderArea::getSceneManager()

Reimplemented from SoWinRenderArea.

◆ sizeChanged()

void SoWinViewer::sizeChanged ( const SbVec2s size)
protectedvirtual

Called internally from within the SoWin library when the widget embedded in a component changes it size, which is usually triggered by end-user interaction.

This method is then invoked to notify the component that the size has changed. It is called from the top and all the way down to the bottom, the size being adjusted to take into account extra decorations having been added at each level in the component class hierarchy.

Reimplemented from SoWinRenderArea.

Reimplemented in SoWinFullViewer.

◆ setSeekMode()

void SoWinViewer::setSeekMode ( SbBool  enable)
protectedvirtual

Put the viewer in or out of "waiting-to-seek" mode.

If the user performs a mouse button click when the viewer is in "waiting-to-seek" mode, the camera will be repositioned so the camera focal point lies on the point of the geometry under the mouse cursor.

See also
isSeekMode(), setDetailSeek()

Reimplemented in SoWinExaminerViewer, SoWinFlyViewer, and SoWinPlaneViewer.

◆ isSeekMode()

SbBool SoWinViewer::isSeekMode ( void  ) const
protected

Return a flag which indicates whether or not the viewer is in "waiting-to-seek" mode.

(The actual animated translation will not occur until the end user really starts the seek operation, typically by clicking with the left mousebutton.)

See also
setSeekMode()

◆ seekToPoint() [1/2]

SbBool SoWinViewer::seekToPoint ( const SbVec2s  screenpos)
protected

Call this method to initiate a seek action towards the 3D intersection of the scene and the ray from the screen coordinate's point and in the same direction as the camera is pointing.

Returns TRUE if the ray from the screenpos position intersect with any parts of the onscreen geometry, otherwise FALSE.

◆ seekToPoint() [2/2]

void SoWinViewer::seekToPoint ( const SbVec3f scenepos)
protected

Call this method to initiate a seek action towards the give 3D world coordinate point in the scene, scenepos.

Since
SoWin 1.3.0

◆ computeSeekFinalOrientation()

void SoWinViewer::computeSeekFinalOrientation ( void  )
protectedvirtual

This method can be overridden in subclasses if the final orientation of the camera after a seek should be something other than what is computed in SoWinViewer::seekToPoint(const SbVec3f & scenepos)

Reimplemented in SoWinPlaneViewer.

◆ actualRedraw()

void SoWinViewer::actualRedraw ( void  )
protectedvirtual

This method instantly redraws the normal (non-overlay) scenegraph by calling SoSceneManager::render().

Subclasses may override this method to add their own rendering before or after Coin renders it's scenegraph.

The following is a complete example that demonstrates one way of adding both a background image and foreground (overlay) geometry to the "normal" rendering:

// This example shows how to put a permanent background image on
// your viewer canvas, below the 3D graphics, plus overlay
// foreground geometry. Written by mortene.
// Copyright Kongsberg Oil & Gas Technologies 2002.
// *************************************************************************
#include <Inventor/Win/SoWin.h>
#include <Inventor/Win/viewers/SoWinExaminerViewer.h>
#include <Inventor/nodes/SoBaseColor.h>
#include <Inventor/nodes/SoCone.h>
#include <Inventor/nodes/SoCube.h>
#include <Inventor/nodes/SoImage.h>
#include <Inventor/nodes/SoLightModel.h>
#include <Inventor/nodes/SoOrthographicCamera.h>
#include <Inventor/nodes/SoRotationXYZ.h>
#include <Inventor/nodes/SoSeparator.h>
#include <Inventor/nodes/SoTranslation.h>
#include <GL/gl.h>
// *************************************************************************
class MyExaminerViewer : public SoWinExaminerViewer {
public:
MyExaminerViewer(HWND parent, const char * filename);
~MyExaminerViewer();
protected:
virtual void actualRedraw(void);
private:
SoSeparator * bckgroundroot;
SoSeparator * foregroundroot;
SoRotationXYZ * arrowrotation;
};
MyExaminerViewer::MyExaminerViewer(HWND parent, const char * filename)
{
// Coin should not clear the pixel-buffer, so the background image
// is not removed.
this->setClearBeforeRender(FALSE, TRUE);
// Set up background scenegraph with image in it.
this->bckgroundroot = new SoSeparator;
this->bckgroundroot->ref();
cam->position = SbVec3f(0, 0, 1);
cam->height = 1;
// SoImage will be at z==0.0.
cam->nearDistance = 0.5;
cam->farDistance = 1.5;
SoImage * img = new SoImage;
img->filename = filename;
this->bckgroundroot->addChild(cam);
this->bckgroundroot->addChild(img);
// Set up foreground, overlayed scenegraph.
this->foregroundroot = new SoSeparator;
this->foregroundroot->ref();
bc->rgb = SbColor(1, 1, 0);
cam->position = SbVec3f(0, 0, 5);
cam->height = 10;
cam->nearDistance = 0;
cam->farDistance = 10;
const double ARROWSIZE = 2.0;
posit->translation = SbVec3f(-2.5 * ARROWSIZE, 1.5 * ARROWSIZE, 0);
arrowrotation = new SoRotationXYZ;
arrowrotation->axis = SoRotationXYZ::Z;
SoTranslation * offset = new SoTranslation;
offset->translation = SbVec3f(ARROWSIZE/2.0, 0, 0);
SoCube * cube = new SoCube;
cube->width = ARROWSIZE;
cube->height = ARROWSIZE/15.0;
this->foregroundroot->addChild(cam);
this->foregroundroot->addChild(lm);
this->foregroundroot->addChild(bc);
this->foregroundroot->addChild(posit);
this->foregroundroot->addChild(arrowrotation);
this->foregroundroot->addChild(offset);
this->foregroundroot->addChild(cube);
}
MyExaminerViewer::~MyExaminerViewer()
{
this->bckgroundroot->unref();
this->foregroundroot->unref();
}
void
MyExaminerViewer::actualRedraw(void)
{
// Must set up the OpenGL viewport manually, as upon resize
// operations, Coin won't set it up until the SoGLRenderAction is
// applied again. And since we need to do glClear() before applying
// the action..
const SbViewportRegion vp = this->getViewportRegion();
glViewport(origin[0], origin[1], size[0], size[1]);
const SbColor col = this->getBackgroundColor();
glClearColor(col[0], col[1], col[2], 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Render our scenegraph with the image.
SoGLRenderAction * glra = this->getGLRenderAction();
glra->apply(this->bckgroundroot);
// Render normal scenegraph.
// Increase arrow angle with 1/1000 every frame.
arrowrotation->angle = arrowrotation->angle.getValue() + (0.001 / M_PI * 180);
// Render overlay front scenegraph.
glClear(GL_DEPTH_BUFFER_BIT);
glra->apply(this->foregroundroot);
}
// *************************************************************************
int
main(int argc, char ** argv)
{
if (argc != 2) {
(void)fprintf(stderr, "\n\n\tUsage: %s <image-filename>\n\n", argv[0]);
exit(1);
}
HWND window = SoWin::init(argv[0]);
MyExaminerViewer * viewer = new MyExaminerViewer(window, argv[1]);
viewer->setSceneGraph(new SoCone);
viewer->show();
SoWin::show(window);
delete viewer;
return 0;
}
// *************************************************************************

Reimplemented from SoWinRenderArea.

Reimplemented in SoWinExaminerViewer, SoWinFlyViewer, and SoWinPlaneViewer.

◆ processSoEvent()

SbBool SoWinViewer::processSoEvent ( const SoEvent *const  event)
protectedvirtual

Toolkit-native events are attempted converted to Coin-generic events in the SoWinRenderArea::processEvent() method. If this succeeds, they are forwarded to this method.

This is a virtual method, and is overridden in it's subclasses to catch events of particular interest to the viewer classes, for instance.

Return TRUE iff the event was processed. If not it should be passed on further up in the inheritance hierarchy by the caller. This last point is extremely important to take note of if you are expanding the toolkit with your own viewer class.

This method is not part of the original SGI InventorXt API. Note that you can still override the toolkit-native processEvent() method instead of this "generic" method.

Reimplemented from SoWinRenderArea.

Reimplemented in SoWinFullViewer, SoWinExaminerViewer, SoWinFlyViewer, and SoWinPlaneViewer.

◆ interactiveCountInc()

void SoWinViewer::interactiveCountInc ( void  )
protected

To be able to trigger callback functions when user interaction starts and/or stops, we need to keep track of the viewer state (i.e. are we in still mode or in animation mode?).

SoWinViewer automatically adds callbacks to switch between still and moving draw style, and to switch between single/double buffer when the buffer type is INTERACTIVE.

See also
interactiveCountDec(), getInteractiveCount()
addStartCallback(), addFinishCallback()
removeStartCallback(), removeFinishCallback()
setDrawStyle(), setBufferingType()

◆ interactiveCountDec()

void SoWinViewer::interactiveCountDec ( void  )
protected

To be able to trigger callback functions when user interaction starts and/or stops, we need to keep track of the viewer state (i.e. are we in still mode or in animation mode?).

SoWinViewer automatically adds callbacks to switch between still and moving draw style, and to switch between single/double buffer when the buffer type is INTERACTIVE.

See also
interactiveCountInc(), getInteractiveCount()
addStartCallback(), addFinishCallback()
removeStartCallback(), removeFinishCallback()
setDrawStyle(), setBufferingType()

◆ getInteractiveCount()

int SoWinViewer::getInteractiveCount ( void  ) const
protected

Return current interaction count nesting. If equal to zero, the viewer is in animation mode, otherwise the camera is still.

See also
interactiveCountInc(), interactiveCountDec()

◆ setSeekDistance()

void SoWinViewer::setSeekDistance ( const float  distance)
protected

Set the value used for calculating how close the camera and intersection hit point should be made at the end of a seek operation.

The value can be interpreted as an absolute value in the given world unit (which typically is meters) or as a percentage value of the distance between the camera starting position and the intersection hit point. This can be controlled through the setSeekValueAsPercentage() method. It is as default used as an absolute value.

Default value is 50 (absolute distance or percent).

See also
getSeekDistance(), setSeekValueAsPercentage(), setSeekTime()

◆ getSeekDistance()

float SoWinViewer::getSeekDistance ( void  ) const
protected

Returns the current seek distance. Value given as an absolute scalar length or as a percentage value of the original distance between the hitpoint and the camera starting position.

See also
setSeekDistance(), isSeekValueAsPercentage()

◆ setSeekValueAsPercentage()

void SoWinViewer::setSeekValueAsPercentage ( const SbBool  on)
protected

Control whether or not the seek distance value should be interpreted as a percentage value or as an absolute distance. See documentation on setSeekDistance() for more information.

See also
setSeekDistance(), isSeekValueAsPercentage()

◆ isSeekValuePercentage()

SbBool SoWinViewer::isSeekValuePercentage ( void  ) const
protected

Returns an boolean which indicates if the seek distance value from getSeekDistance() should be interpreted as a percentage value or as an absolute value.

See also
setSeekValuePercentage(), getSeekDistance()

◆ changeCameraValues()

void SoWinViewer::changeCameraValues ( SoCamera camera)
protectedvirtual

Copies the settings of camera into our current camera. Cameras must be of the same class type.

Reimplemented in SoWinConstrainedViewer.

◆ addSuperimposition()

void SoWinViewer::addSuperimposition ( SoNode scene)
protected

This method is for setting up a superimposed scene graph on top of the viewer scene graph. It will be used for adding spin-rotation coordinate systems, fly-viewer speed indicators and similar things.

This method is not part of the original InventorXt API.

◆ removeSuperimposition()

void SoWinViewer::removeSuperimposition ( SoNode scene)
protected

This method is not part of the original InventorXt API.

◆ setSuperimpositionEnabled()

void SoWinViewer::setSuperimpositionEnabled ( SoNode scene,
const SbBool  enable 
)
protected

This method sets whether the superimposed scene graph should be traversed or not.

This method is not part of the original InventorXt API.

◆ getSuperimpositionEnabled()

SbBool SoWinViewer::getSuperimpositionEnabled ( SoNode scene) const
protected

This method returns whether the superimposed scene is rendered or not.

This method is not part of the original InventorXt API.


The documentation for this class was generated from the following files: