University of California, Berkeley
EECS Dept, CS Division
Jordan Smith SLIDE: Scene Language for
Interactive Dynamic Environments
Prof. Carlo H. Séquin

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SLIDE Implementation Specification

SLIDE Class Hierarchy

The following is a diagram of the SLIDE C++ class hierarchy. Subclasses point up to their superclasses. Every textual SLIDE language element has a corresponding C++ class which represents its type in the run time viewer program. Notice that most SLIDE types are directly or indirectly a subclass of CSLIDEPrimitive.

Notice that CSLIDEObject, CSLIDEGroup, and CSLIDEInstance all share a common superclass, CSLIDENode. This common CSLIDENode type eases the management of the scene graph DAG.

Notice that CSLIDERotate, CSLIDEScale, and CSLIDETranslate all share a common superclass, CSLIDETransform. This common CSLIDETransform type eases the management of transforms in the CSLIDEInstance class.

The classes which appear in red have had portions of their implementations removed. You need to complete the functionality of these classes.

Scan Converter

This is where all of your work will be done this week. You need to write the FillPolygon method which uses Z-Buffering for hidden surface removal.

Take note that there is no prepared solution for this weeks assignment, and you will need to build off of it for the lighting assignment.

Outline of Viewer Execution

For more information and diagrams checkout the SLIDE Rendering Pipeline Page. Note: Ignore the rendering pass described there and follow the one described at the bottom of this page instead.

Render

The following graph shows what should be happening for a single face in the rendering process, starting with the HandleDisplay callback on the CWindow object. Note that the matrix notation used in the diagram is ROW VECTOR form, and you will be coding COLUMN VECTORS in the project. The red blocks indicate which portions of the rendering pipeline have changed since the last assignment. These are the ones which you will be creating.

You can also download the postscript version of this graph: render.ps

Suggested Plan of Attack

  1. Get the 2D scan conversion working ignoring the Z values
  2. Get the Z-Buffer code working



This page was originally built by Jordan Smith.

Last modified: Monday, 15-Mar-1999 10:57:52 PST