Package com.sun.j3d.utils.geometry

Class Sphere

  • public class Sphere
extends Primitive
    Sphere is a geometry primitive created with a given radius and resolution. It is centered at the origin.

    When a texture is applied to a Sphere, it is mapped CCW from the back of the sphere.

    By default all primitives with the same parameters share their geometry (e.g., you can have 50 shperes in your scene, but the geometry is stored only once). A change to one primitive will effect all shared nodes. Another implication of this implementation is that the capabilities of the geometry are shared, and once one of the shared nodes is live, the capabilities cannot be set. Use the GEOMETRY_NOT_SHARED flag if you do not wish to share geometry among primitives with the same parameters.

    • Constructor Detail

      • Sphere

        public Sphere​(float radius)
        Constructs a Sphere of a given radius. Normals are generated by default, texture coordinates are not. The resolution defaults to 15 divisions along sphere's axes. Appearance defaults to white.
        Parameters:
        radius - Radius

      • Sphere

        public Sphere()
        Constructs a default Sphere of radius of 1.0. Normals are generated by default, texture coordinates are not. Resolution defaults to 15 divisions. Appearance defaults to white.

      • Sphere

        public Sphere​(float radius,
              Appearance ap)
        Constructs a Sphere of a given radius and appearance. Normals are generated by default, texture coordinates are not.
        Parameters:
        radius - Radius
        ap - Appearance

      • Sphere

        public Sphere​(float radius,
              int primflags,
              Appearance ap)
        Constructs a Sphere of a given radius and appearance with additional parameters specified by the Primitive flags.
        Parameters:
        radius - Radius
        primflags -
        ap - appearance

      • Sphere

        public Sphere​(float radius,
              int primflags,
              int divisions)
        Constructs a Sphere of a given radius and number of divisions with additional parameters specified by the Primitive flags. Appearance defaults to white.
        Parameters:
        radius - Radius
        divisions - Divisions
        primflags - Primflags

      • Sphere

        public Sphere​(float radius,
              int primflags,
              int divisions,
              Appearance ap)
        Constructs a customized Sphere of a given radius, number of divisions, and appearance, with additional parameters specified by the Primitive flags. The resolution is defined in terms of number of subdivisions along the sphere's axes. More divisions lead to more finely tesselated objects.

        If the appearance is null, the sphere defaults to a white appearance.

    • Method Detail

      • getShape

        public Shape3D getShape​(int partId)
        Obtains Sphere's shape node that contains the geometry. This allows users to modify the appearance or geometry.
        Specified by:
        getShape in class Primitive
        Parameters:
        partId - The part to return (must be BODY for Spheres)
        Returns:
        The Shape3D object associated with the partId. If an invalid partId is passed in, null is returned.

      • getShape

        public Shape3D getShape()
        Obtains Sphere's shape node that contains the geometry.

      • getAppearance

        public Appearance getAppearance​(int partId)
        Gets the appearance of the specified part of the sphere.
        Specified by:
        getAppearance in class Primitive
        Parameters:
        partId - identifier for a given subpart of the sphere
        Returns:
        The appearance object associated with the partID. If an invalid partId is passed in, null is returned.
        Since:
        Java 3D 1.2.1

      • cloneNode

        public Node cloneNode​(boolean forceDuplicate)
        Used to create a new instance of the node. This routine is called by cloneTree to duplicate the current node. cloneNode should be overridden by any user subclassed objects. All subclasses must have their cloneNode method consist of the following lines: 

             public Node cloneNode(boolean forceDuplicate) {
         UserSubClass usc = new UserSubClass();
         usc.duplicateNode(this, forceDuplicate);
         return usc;
     }
        Overrides:
        cloneNode in class Group
        Parameters:
        forceDuplicate - when set to true, causes the duplicateOnCloneTree flag to be ignored. When false, the value of each node's duplicateOnCloneTree variable determines whether NodeComponent data is duplicated or copied.
        See Also:
        Node.cloneTree(), Node.duplicateNode(javax.media.j3d.Node, boolean), NodeComponent.setDuplicateOnCloneTree(boolean)

      • duplicateNode

        public void duplicateNode​(Node originalNode,
                          boolean forceDuplicate)
        Copies all node information from originalNode into the current node. This method is called from the cloneNode method which is, in turn, called by the cloneTree method.

        For any NodeComponent objects contained by the object being duplicated, each NodeComponent object's duplicateOnCloneTree value is used to determine whether the NodeComponent should be duplicated in the new node or if just a reference to the current node should be placed in the new node. This flag can be overridden by setting the forceDuplicate parameter in the cloneTree method to true.

        Overrides:
        duplicateNode in class Node
        Parameters:
        originalNode - the original node to duplicate.
        forceDuplicate - when set to true, causes the duplicateOnCloneTree flag to be ignored. When false, the value of each node's duplicateOnCloneTree variable determines whether NodeComponent data is duplicated or copied.
        See Also:
        Node.cloneTree(), Node.cloneNode(boolean), NodeComponent.setDuplicateOnCloneTree(boolean)

      • getRadius

        public float getRadius()
        Returns the radius of the sphere
        Since:
        Java 3D 1.2.1

      • getDivisions

        public int getDivisions()
        Returns the number of divisions
        Since:
        Java 3D 1.2.1