CS 285: SOLID MODELING

Lecture #8 -- We, Feb. 20, 2002.

Preparation

Paper Presentation, Discussion, and Video

1. What is the paper all about ?
2. How does it differ from a "naive" approach ?
3. What is the key idea that the authors exploit ?
4. How do they obtain a consistent B-rep ?
5. What is the most dramatic result that they show ?

Meta-skills: How to read a paper when you don't have enough time ...

1. Read: Abstract, Intro, Conclusions, and try to get a clear picture what the paper is all about.
2. Look at figures and figure captions, and read some of the key technical sections as well as the result section to discover what the special contribution of the paper is.
3. Think about whether this all makes a consistent story, or whether something crucial is missing.
4. Hunt specifically for those unclear/missing issues and try to get clarification.
5. Decide whether you need a more detailed view on how the described techniques work and search specifically for the sections that may give you the answers.
6. Take some notes about the key points discovered as you go along, (perhaps also highlight key passages in the paper).
7. Make a list of open question that you would like to get answers to -- either from someone else, or by yourself at a later time when you have more time to dig deeper into the paper.

Discussion of Assignment #5: Designing a Bell for Layered Manufacturing

Layered Manufacturing

QuickSlice

• Closed, water-tight, properly oriemted B-reps.
• Implicit Boolean union operations.
• Optimal build orientation.
• Yellow curves in the sliced set.
• Overlapping and nested red curves.
• Minimal wall thickness for fabrication (1.5mm = 60mils).
• Where are supports needed? Steepness of overhangs. Build no wedges (keels).
• Check consistency of support areas.
• Check estimated run time (costs).

Homework Assignments:

Finish: A#5: Preparing your Bell for Layered Manufacturing

A#6: Build your Bell on the FDM Machine

Reading Assignment: Read MC01