Class SoDirectionalLightDragger

  • All Implemented Interfaces:

    public class SoDirectionalLightDragger
    extends SoDragger
    Directional icon you rotate and translate by dragging with the mouse. SoDirectionalLightDragger is a composite dragger. It looks like a sun with a large arrow coming out of it. The arrow can be rotated about the sun by dragging with the mouse; its orientation is given by the rotation field. You can also drag the sun (and the arrow with it) through 3-space. The location is stored in the translation field.

    The dragger uses an SoRotateSphericalDragger for changing the rotation. Instead of using the default spherical geometry, this dragger uses an arrow shape.

    The sun is an SoDragPointDragger. Dragging it edits the translation field; conversely, if you change the translation field the sun will move to that new location, bringing the arrow with it. The sun looks and behaves just like the sun in an SoPointLightDragger, as does the material part. See the SoPointLightDragger reference page for details.

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

    • Use an SoDirectionalLightManip, which is subclassed from SoLight. It creates an SoDirectionalLightDragger and uses it as the interface to change the direction of its light source (see the SoDirectionalLightManip reference page). The manipulator also edits the material part of this dragger to match the color of light the manipulator is producing. However, the directional light manipulator will ignore the translation field, because a directional light has no location or translation field. So in this case the translation dragger merely allows you to move the physical arrow to wherever you'd like it to be.
    • Put an SoTransform under an SoTransformSeparator. Add the SoDirectionalLight as the next child. Use a field-to-field connection between the rotation fields of this dragger and the transform node to synchronize the light with this dragger.
    • Use engines to connect the rotation field of this dragger to the direction field of an SoDirectionalLight. Use the rotation as input to an SoComposeMatrix engine. Then, use an SoTransformVec3f engine to apply that matrix to (0,0,-1), the default light direction.

    You can change the parts in any instance of this dragger using setPart(). The default part geometries are defined as resources for this SoDirectionalLightDragger class. They are detailed in the Dragger Resources section of the online reference page for this class. You can make your program use different default resources for the parts by copying the file $OIVHOME/data/draggerDefaults/directionalLightDragger.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.

    File format/default:

    DirectionalLightDragger {

      boundingBoxCaching AUTO
      renderCulling AUTO
      pickCulling AUTO
      isActive false
      translation 0 0 0
      rotation 0 0 1 0
      callbackList NULL
      material <directionalLightOverallMaterial resource>
      translatorRotInv NULL
      translator DragPointDragger {
      rotator RotateSphericalDragger {
      rotator.rotator <directionalLightRotatorRotator resource>
      rotator.rotatorActive <directionalLightRotatorRotatorActive resource> <directionalLightRotatorFeedback resource>
      rotator.feedbackActive <directionalLightRotatorFeedbackActive resource>
      translator.yzTranslator.translator <directionalLightTranslatorPlaneTranslator resource>
      translator.xzTranslator.translator <directionalLightTranslatorPlaneTranslator resource>
      translator.xyTranslator.translator <directionalLightTranslatorPlaneTranslator resource>
      translator.yzTranslator.translatorActive <directionalLightTranslatorPlaneTranslatorActive resource>
      translator.xzTranslator.translatorActive <directionalLightTranslatorPlaneTranslatorActive resource>
      translator.xyTranslator.translatorActive <directionalLightTranslatorPlaneTranslatorActive resource>
      translator.xTranslator.translator <directionalLightTranslatorLineTranslator resource>
      translator.yTranslator.translator <directionalLightTranslatorLineTranslator resource>
      translator.zTranslator.translator <directionalLightTranslatorLineTranslator resource>
      translator.xTranslator.translatorActive <directionalLightTranslatorLineTranslatorActive resource>
      translator.yTranslator.translatorActive <directionalLightTranslatorLineTranslatorActive resource>
      translator.zTranslator.translatorActive <directionalLightTranslatorLineTranslatorActive resource>


      Resource: directionalLightRotatorRotator
      Part: rotator.rotator
      Appearance: white arrow that goes through the sun
      Description: picking this begins rotation of the arrow about the sun-shape

      Resource: directionalLightRotatorRotatorActive
      Part: rotator.rotatorActive
      Appearance: yellow arrow that goes through the sun
      Description: displayed while the arrow is being rotated

      Resource: directionalLightRotatorFeedback
      Appearance: empty Separator
      Description: this disables display of the axes that a rotateSpherical dragger uses by default

      Resource: directionalLightRotatorFeedbackActive
      Part: rotator.feedbackActive
      Appearance: empty Separator
      Description: this disables display of the axes that a rotateSpherical dragger uses by default

      Resource: directionalLightOverallMaterial
      Part: material
      Appearance: white. half strength emissive, half strength diffuse
      Description: sets material for the sun shape when stationary. Resource for the moving sun, directionalLightTranslatorPlaneTranslatorActive, contains a yellow material for highlighting.

      Resource: directionalLightTranslatorPlaneTranslator
      Parts: translator.yzTranslator.translator<BR> translator.xzTranslator.translator<BR> translator.xyTranslator.translator
      Appearance: sun shape with no material
      Description: picking these parts initiates dragging by the yz, xz, and xy planar draggers respectively.

      Resource: directionalLightTranslatorPlaneTranslatorActive
      Parts: translator.yzTranslator.translatorActive<BR> translator.xzTranslator.translatorActive<BR> translator.xyTranslator.translatorActive
      Appearance: yellow sun shape
      Description: shown during planar dragging in the yz, xz, and xy planes respectively.

      Resource: directionalLightTranslatorLineTranslator
      Parts: translator.xTranslator.translator<BR> translator.yTranslator.translator<BR> translator.zTranslator.translator
      Appearance: white cylinder
      Description: picking these parts initiates dragging in the x, y, and z linear draggers respectively.

      Resource: directionalLightTranslatorLineTranslatorActive
      Parts: translator.xTranslator.translatorActive<BR> translator.yTranslator.translatorActive<BR> translator.zTranslator.translatorActive
      Appearance: yellow cylinder
      Description: shown during linear dragging in the x, y, and z directions respectively.


    All Parts

      Part NamePart TypeDefault TypeNULL Default
      callbackList NodeKitListPart yes
      material Material yes
      translatorRotInv Rotation yes
      translator DragPointDragger yes
      rotator RotateSphericalDragger yes

    Extra Information for List Parts from Above Table

      Part NameContainer TypePossible Types
      callbackList Separator Callback; EventCallback

    See Also:
    SoInteractionKit, SoDragger, SoCenterballDragger, SoDragPointDragger, SoHandleBoxDragger, SoJackDragger, SoPointLightDragger, SoRotateCylindricalDragger, SoRotateDiscDragger, SoRotateSphericalDragger, SoScale1Dragger, SoScale2Dragger, SoScale2UniformDragger, SoScaleUniformDragger, SoSpotLightDragger, SoTabBoxDragger, SoTabPlaneDragger, SoTrackballDragger, SoTransformBoxDragger, SoTransformerDragger, SoTranslate1Dragger, SoTranslate2Dragger
    • Field Detail

      • rotation

        public final SoSFRotation rotation
        Orientation of the rotating part (an arrow by default).
      • translation

        public final SoSFVec3f translation
        Position of the origin of the directional light dragger.
    • Constructor Detail

      • SoDirectionalLightDragger

        public SoDirectionalLightDragger()