Class SoLOD

  • All Implemented Interfaces:
    Direct Known Subclasses:

    public class SoLOD
    extends SoGroup
    Distance-based level-of-detail switching group node. This group node is used to allow applications to switch between various representations of objects automatically. The children of this node typically represent the same object or objects at varying levels of detail, from highest detail to lowest. The distance from the world-space eye point to the transformed center of the LOD is computed, and one child is drawn, based on the values in the ranges field.

    More precisely, if the distance from the world-space eyepoint to the transformed center is D and the ranges array contains LAST_RANGE+1 values (numbered 0...LAST_RANGE), then:

       if D < ranges[0] : Child 0 is drawn
       else if ranges[i-1] < D < ranges[i] : Child i is drawn
       else if D > ranges[LAST_RANGE] : Child LAST_RANGE+1 is drawn
    Thus, N ranges and N+1 children should be specified. If you specify too few children, the last child will be used for the extra ranges. If you specify too few ranges, the extra children will never be used.

    It is often useful to define the lowest detail child to be an SoInfo node. This causes the object to completely disappear if it is far enough away from the eyepoint. Defining the highest detail child to be an SoInfo node can also be useful if you want the object to disappear if it gets too close to the eyepoint.

    File format/default:

    LOD {

      center 0 0 0
      range [ ]

    Action behavior:

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

    Other actions

    All implemented as for SoGroup.

    See Also:
    SoSwitch, SoGroup, SoLevelOfDetail, SoLevelOfSimplification
    • Field Detail

      • range

        public final SoMFFloat range
        World-space distances to use as switching criteria.
      • center

        public final SoSFVec3f center
        Object-space center of the model.
    • Constructor Detail

      • SoLOD

        public SoLOD​(int nChildren)
        Constructor that takes approximate number of children.
      • SoLOD

        public SoLOD()
        Creates a distance-based level-of-detail node with default settings.