opxmviewer is the Motif version of opviewer. opxmviewer allows user input through a menu bar instead of command-line input. /usr/share/Optimizer/src/libopXmGUI is the motif version of /usr/share/Optimizer/src/libopGUI.

opxmviewer is a typical Motif application that creates a main window and a menu bar. The application also creates an opXmViewer widget attached to the main window. opXmViewer is the motif version of opViewer, discussed in “Viewing Class: opViewer”. opXmViewer is a composite Motif widget consisting of a main drawing area, an information area (for help text), and a user interface area.

opxmviewer takes the same command-line options as opviewer, with the exception of occlusion culling and no-picking options: occlusion culling is not available and the picking option is always on. Interactive controls are defined by the class opXmDrawImpl, which is the Motif analog to a combination of opDefDrawImpl and opPickDrawImpl, which are discussed in “Controlling Rendering: opKeyCallback and opDrawImpl”; and in “Interacting With a Rendered Object: opPickDrawImpl”.

As in opviewer, translation, rotation and zoom are done in opxmviewer using the mouse in the drawing area. Unlike opviewer, the other interactions are controlled by buttons in the user interface area, rather than by keyboard commands. If users pass the cursor over a button, the help text associated with that button is displayed in the information area.

opxdemo is the X version of opviewer. opxdemo illustrates how to render a Cosmo3D scene graph inside an X Window. It presents a minimal OpenGL Optimizer application and emphasizes the rendering process. It includes the necessary routines from the following libraries: X Window, OpenGL extensions to X, Cosmo3D, and OpenGL Optimizer.

opoptimize uses most of the OpenGL Optimizer scene-graph-tuning tools that include simplifying shapes, creating LODs, and writing out .csb files. It is mainly used in batch processing mode, although it is possible to view the scene graph using an opViewer (see “Viewing Class: opViewer”).

A line-by-line commentary for opoptimize appears in Appendix D, “Scene Graph Tuning With the opoptimize Application.” This application adds to opviewer the command-line options and keyboard controls from the file /usr/share/Optimizer/src/apps/opoptimize/main.cxx.

mergeLODDemo creates level-of-detail (LOD) nodes at leaf nodes. mergeLODDemo provides fewer options than opoptimize, which places LOD nodes near the root of the scene graph.

This application illustrates how to combine topologically identical scene graphs that contain leaf nodes with differing levels of detail. See “Merging Graphs With Differing Levels of Detail: opMergeScenes”.

repTest is used for rendering higher-order reps, providing an environment for developing and rendering these objects.

This application is discussed in Chapter 9, “Higher-Order Geometric Primitives and Discrete Meshes.” It adds to opviewer command-line options from in the file /usr/share/Optimizer/src/apps/reptest/main.cxx.

topoTest illustrates the use of the OpenGL Optimizer topology building tools to “stitch” together surfaces. It is designed to help you import surfaces whose connectivity you know so that you can use the OpenGL Optimizer tessellators to get crack-free images. The application also illustrates an approach to developing trimmed NURBS surfaces that differs somewhat from that used in repTest.

Topology building tools are discussed in Chapter 10, “Creating and Maintaining Surface Topology.”

opviz illustrates how to use OpenGL Optimizer to visualize discrete scientific and engineering data.

This application is discussed in the section “Sample Mesh Tessellation: opviz and opVizViewer”. It adds to opviewer the command-line options that appear in the file /usr/share/Optimizer/src/apps/opviz/main.cxx, and the interactive commands that appear in opVizViewer.cxx.

zebraFly illustrates the use of reflection mapping to get tube-lighting effects, which simulate lighting by fluorescent lights in a cylindrical room. The file /usr/share/Optimizer/src/apps/zebrafly/README describes the basic controls for the application, which is based on opviewer.

Reflection mapping tools are discussed in Chapter 8, “Efficient High-Quality Lighting Effects: Reflection Mapping.”