Previous Next

                                                   832
         CHAPTER 9                                                          Multimedia Features



         Figure 9.14 shows a view whose node array includes three nodes, all of which are
         rendered with the appearance opaque (/O 1) and visible (/V true).




FIGURE 9.15 Rendering of the 3D artwork using View2 (the cone is hidden and the sphere is semi-transparent)


         Figure 9.15 shows a view with a node array that specifies the same three nodes
         used in Figure 9.14. These nodes have the following display characteristics:
         • The node named Sphere is partially transparent (/O 0.5) and visible (/V true)
         • The node named Cone is opaque (/O 1) and invisible (/V false)
         • The node named Cube is opaque (/O 1) and visible (/V true)

9.5.4 Coordinate Systems for 3D

         3D artwork is a collection of objects whose positions and geometry are specified
         using three-dimensional coordinates. Section 4.2, “Coordinate Systems,” discuss-
         es the concepts of two-dimensional coordinate systems, their geometry and
         transformations. This section extends those concepts to include the third dimen-
         sion.

Previous Next