Dec 8 - Shape Tool Library

Hour 1 - Library Concepts

• Genesis
  • Library Needs
    • Portable geometry manipulation
    • Easily used
    • Easily compiled
  • Library is Not:
    • visualization toolkit
    • file format
  • Solution
    • Java
    • General data model
    • Extensible read/write archictecture
    • Documentation
    • Useful Examples

• Data Model (:10 - :15)
  • Shape definition - tinkertoy / points connected by straight (Eulerian) lines.
  • points, edges, faces, solids, attributes, children

Library Organization

goals easy to use keep core classes small separate types of functionality into different packages extensible no dimensional assumptions (n-d vertices) excellent documentation: java doc, user guides, examples, twiki do only whats actually needed. unit testing structure (figure 2) shape package - core data model shapeio package - readers and writers shape packages other packages attribute geometry - component implementations math - math computation methods util - misc utilities

Trivial Example and important Implementation Details

• Simple example - ShowVersion

coordinate arrays

edges are directional

More Examples (:50 - :60)

• Example: Calculate Ucf Center of Mass Center of Ucf
• Example : Read Ucf with '4d' data attributes Ucf Quick start example 2

break (5 min)

Hour 2

Questions, Comments and Suggestions