Viewing & Rendering

Table of Contents

3D Geometric Modeling Road Map

Conceptual Viewing and Rendering Pipeline

Model Traversal

Traversal Paths, Composing Modeling Transformations

Adding Viewing Transformation During Traversal

Refresher on Viewing Transformation (VT) for Perspective Projection

Perspective Projection vs. Perspective Transformation

Clipping Against View Volume

Visible Surface Determination--Back-Face Culling

Visible Surface Determination--Polygon Clipping

A Digression: Graphics Hardware Architecture

Pixmaps

Buffers

Actual Viewing and Rendering Pipeline

Depth Comparison using a z-Buffer

Integer z-Buffer Example

Scan Conversion

Filling Rectangles

Polygon-Filling Algorithm

Wireframe Rendering

Illumination and Shading

Reflection Characteristics of Surfaces

Polygon Shading

Gouraud Shading

Viewing & Rendering - 08 MAY 95

sl@cs.brown.edu