CS145: Topics for the Week of Feb 15, 2010

• Continue to work on Lab 4: Parameters, Translations, and the Matrix Stack . This is due Wed.

• Wed: Begin Lab 5: Scale and Rotate Transformations.

• Note, Exam 1 will be approximately in 2 weeks. Material will be placed on study page.

• Programming Elements for this Week

  • Review the Matrix Stack.
    • What is a stack? Last-in, First-out (LIFO)
    • What is a matrix stack?
    • Sequence in code matters!
  • Rotation and the fixed point (or pivot).
  • Scaling and the fixed point (or pivot).
  • Rotation, Translate, and Scale combined.

• Creating hierarchical structures - robot arm, solar system, car (robot arm and solar system code can be found on WISE under resources.

• Transformations can be used to create symmetry designs:

  • M. C. Escher
  • Islamic Geometric Art
  • Misc links