SoSpotLightDragger Class Reference
[Draggers]

Spotlight shaped dragger that allows you to change position, direction, and width of the beam. More...

#include <Inventor/draggers/SoSpotLightDragger.h>

Inheritance diagram for SoSpotLightDragger:
SoDragger SoInteractionKit SoBaseKit SoNode SoGetView SoFieldContainer SoBase SoRefCounter SoTypedObject

List of all members.

Public Member Functions

virtual SoType getTypeId () const
virtual const SoNodekitCataloggetNodekitCatalog () const
 SoSpotLightDragger ()

Static Public Member Functions

static SoType getClassTypeId ()
static const SoNodekitCataloggetClassNodekitCatalog ()

Public Attributes

SoSFRotation rotation
SoSFVec3f translation
SoSFFloat angle

Detailed Description

Spotlight shaped dragger that allows you to change position, direction, and width of the beam.

SoSpotLightDragger is a composite dragger. It is shaped like a beam of light emanating from a sun-like ball. An arrow runs along the axis of the beam and extends past the end of the beam.

When you click and drag the beam, it opens and closes with an umbrella-like motion. The angle between the center and edge of the beam is stored in the angle field of this dragger; setting the angle field causes the beam to widen or narrow in response. The spotlight dragger does not use a standard dragger class to execute this motion. More details are given later in this section.

Dragging the arrow rotates it around the sun, and the beam moves with it. The arrow is an SoRotateSphericalDragger that controls the rotation field. See the reference page for SoDirectionalLightDragger, which works the same way, for details.

The sun-shape can be dragged to translate all three pieces together through 3-space. Its movement controls the translation field and works exactly as described in the reference pages for SoDirectionalLightDragger and SoPointLightDragger (which goes into more detail).

Remember: This is not a light source! It just looks like one. If you want to move a light with this dragger, you can do the following:

See the SoPointLightDragger and SoDirectionalLightDragger reference pages for other ways to control light parameters with the rotation and translation fields.

This class creates its own projector and handles mouse events to do its own dragging of the beam angle. When the mouse picks a point on the beam, that point is dragged in a circle just like in an SoRotateDiscDragger, but the plane of the disc is re-defined every time a drag is initiated. Imagine placing the metal tip of a compass at the apex of the cone and the pencil tip at the picked point. If you swing an arc through the central axis of the cone, you will be drawing the arc used to drag the beam open and closed.

The beam is opened and closed not by rotating, but by scaling. The dragger scales the beam-cone so that the height and radius change to move the picked point along the circle. Then the angle field is calculated from the height and radius.

You can change the geometry of parts in any instance of this dragger using setPart(). The default part geometries are defined as resources for this SoSpotLightDragger class. They are detailed below in the DRAGGER RESOURCE section. You can make your program use different default resources for the parts by copying the file $OIVHOME/data/draggerDefaults/spotLightDragger.iv into your own directory, editing the file, and then setting the environment variable SO_DRAGGER_DIR to be a path to that directory.

See SoDragger for more information about using and customizing draggers, including code examples, using draggers in an immersive VR environment and using WYSIWYG draggers.

SoSpotLightDragger.png

FILE FORMAT/DEFAULT

DRAGGER RESOURCES

CATALOG PARTS

SEE ALSO

SoInteractionKit, SoDragger, SoCenterballDragger, SoDirectionalLightDragger, SoDragPointDragger, SoHandleBoxDragger, SoJackDragger, SoPointLightDragger, SoRotateCylindricalDragger, SoRotateDiscDragger, SoRotateSphericalDragger, SoScale1Dragger, SoScale2Dragger, SoScale2UniformDragger, SoScaleUniformDragger, SoTabBoxDragger, SoTabPlaneDragger, SoTrackballDragger, SoTransformBoxDragger, SoTransformerDragger, SoTranslate1Dragger, SoTranslate2Dragger


Constructor & Destructor Documentation

SoSpotLightDragger::SoSpotLightDragger (  ) 

Constructor.


Member Function Documentation

static const SoNodekitCatalog* SoSpotLightDragger::getClassNodekitCatalog (  )  [static]

Returns the SoNodekitCatalog for this class.

Reimplemented from SoDragger.

static SoType SoSpotLightDragger::getClassTypeId (  )  [static]

Returns the type identifier for this class.

Reimplemented from SoDragger.

virtual const SoNodekitCatalog* SoSpotLightDragger::getNodekitCatalog (  )  const [virtual]

Returns the SoNodekitCatalog for this instance.

Reimplemented from SoDragger.

virtual SoType SoSpotLightDragger::getTypeId (  )  const [virtual]

Returns the type identifier for this specific instance.

Reimplemented from SoDragger.


Member Data Documentation

Angle between center and edge of beam.

Orientation of the rotating part (an arrow by default).

Position of the dragger.


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

Open Inventor Toolkit reference manual, generated on 25 Feb 2021
Copyright © Thermo Fisher Scientific All rights reserved.
http://www.openinventor.com/