SoLevelOfDetail — level-of-detail switching group node

SoGLRenderAction,SoRayPickAction,SoCallbackAction
          Only the child with the appropriate level of detail is traversed.

     SoGetBoundingBoxAction
          The box that encloses all children is computed. (This is  the  box  that  is  needed  to  compute  the
          projected size.)

     others
          All implemented as for SoGroup.

       The  children  of  this  node typically represent the same object or objects at varying levels of detail,
       from highest detail to lowest. The size of the objects when  projected  into  the  viewport  is  used  to
       determine which version to use (i.e., which child to traverse).

       The  size is computed as the area of the screen rectangle enclosing the projection of the 3D bounding box
       that encloses all of the children. When rendering, this size is compared to the values in the  screenArea
       field.  If  the  size  is  greater  than the first value, child 0 is traversed. If it is smaller than the
       first, but greater than the second, child 1 is traversed, and so on. If there are fewer children than are
       required by this rule, the last child is traversed. The screenArea field contains just 0 by  default,  so
       the first child is always traversed.

       The  size  calculation  takes  the  current complexity into account. If the complexity is 0 or is of type
       BOUNDING_BOX, the last child is always traversed. If the complexity is less than .5, the computed size is
       scaled down appropriately to use (possibly) a less detailed representation. If the complexity is  greater
       than .5, the size is scaled up. At complexity 1, the first child is always used.

       Note  that the SoLOD node is similar to SoLevelOfDetail, except the switching between levels in the SoLOD
       node is based on distance from the camera, which is faster than using screen area.

SoMFFloatscreenArea
          Areas to use for comparison

LevelOfDetail{screenArea0}

       SoBase > SoFieldContainer > SoNode > SoGroup > SoLevelOfDetail

SoLevelOfDetail()
          Creates a level-of-detail node with default settings.

     staticSoTypegetClassTypeId()
          Returns type identifier for this class.

       SoLevelOfDetail — level-of-detail switching group node

SoLOD,SoComplexity,SoSwitch,SoGroupSoLevelOfDetail(3IV)()

#include<Inventor/nodes/SoLevelOfDetail.h>

          Fields from class SoLevelOfDetail:

     SoMFFloatscreenArea

          Methods from class SoLevelOfDetail:

                         SoLevelOfDetail()staticSoTypegetClassTypeId()

          Methods from class SoGroup:

     voidaddChild(SoNode*child)voidinsertChild(SoNode*child,intnewChildIndex)SoNode*getChild(intindex)constintfindChild(constSoNode*child)constintgetNumChildren()constvoidremoveChild(intindex)voidremoveChild(SoNode*child)voidremoveAllChildren()voidreplaceChild(intindex,SoNode*newChild)voidreplaceChild(SoNode*oldChild,SoNode*newChild)

          Methods from class SoNode:

     voidsetOverride(SbBoolstate)SbBoolisOverride()constSoNode*copy(SbBoolcopyConnections=FALSE)constvirtualSbBoolaffectsState()conststaticSoNode*getByName(constSbName&name)staticintgetByName(constSbName&name,SoNodeList&list)

          Methods from class SoFieldContainer:

     voidsetToDefaults()SbBoolhasDefaultValues()constSbBoolfieldsAreEqual(constSoFieldContainer*fc)constvoidcopyFieldValues(constSoFieldContainer*fc,SbBoolcopyConnections=FALSE)SbBoolset(constchar*fieldDataString)voidget(SbString&fieldDataString)virtualintgetFields(SoFieldList&resultList)constvirtualSoField*getField(constSbName&fieldName)constSbBoolgetFieldName(constSoField*field,SbName&fieldName)constSbBoolisNotifyEnabled()constSbBoolenableNotify(SbBoolflag)

          Methods from class SoBase:

     voidref()voidunref()constvoidunrefNoDelete()constvoidtouch()virtualSoTypegetTypeId()constSbBoolisOfType(SoTypetype)constvirtualvoidsetName(constSbName&name)virtualSbNamegetName()const