Class SoPath

  • All Implemented Interfaces:

    public class SoPath
    extends SoBase
    A path represents a scene graph or subgraph. It contains a list of pointers to nodes forming a chain from some root to some descendent. Each node in the chain is a child of the previous node. Paths are used to refer to some object in a scene graph precisely and unambiguously, even if there are many instances of the object. Therefore, paths are returned by both the SoRayPickAction and SoSearchAction.

    When an action is applied to a path, only the nodes in the subgraph defined by the path are traversed. These include : the nodes in the path chain, all nodes (if any) below the last node in the path, and all nodes whose effects are inherited by any of these nodes.

    SoPath attempts to maintain consistency of paths even when the structure of the scene graph changes. For example, removing a child from its parent when both are in a path chain cuts the path chain at that point, leaving the top part intact. Removing the node to the left of a node in a path adjusts the index for that node. Replacing a child in the chain with the new child, truncating the path below the new child.

    Since nodekits hide their children, there are 3 ways to view the differents nodes contained by the path
    • the regular path (field regular) do not contains hidden childrens of nodekits
    • the nodekit path (field nodekit) contains only the nodekits
    • the full path (field full) contains all nodes (public and hidden)
    Thus, for instance,
    • full.getLength() returns the number of public and hidden nodes in the path
    • nodekit.getLength() returns the number of nodekits in the path
    • regular.getLength() returns the number of nodes up to the first nodekit in the path
    Jean-Michel Godinaud
    • Field Detail

      • full

        public SoGeneralPath full
        access to all nodes (public and hidden) in the path
      • regular

        public SoGeneralPath regular
        access to all public nodes in the path except hidden children in nodekits.
      • nodekit

        public SoNodeKitPath nodekit
        access only to nodekits in the path
    • Constructor Detail

      • SoPath

        public SoPath()
      • SoPath

        public SoPath​(SoNode node)
      • SoPath

        public SoPath​(int approxLength)
    • Method Detail

      • getByName

        public static SoPath getByName​(java.lang.String name)
        Returns the last path that was given the name, either by SoBase.setName(java.lang.String) or by reading in a named path from a file. If there is no path with the given name, null will be returned.
      • getAllByName

        public static SoPath[] getAllByName​(java.lang.String name)
        Returns an array of all path with the given name. Paths are named by calling their SoBase.setName(java.lang.String).
      • equals

        public boolean equals​(java.lang.Object obj)
        Compares this object against the specified object. The result is true if and only if the argument is not null, is an instance of this's class and has the same value(s).
        equals in class java.lang.Object
        obj - the object to compare with.
        true if the objects are the same; false otherwise.