Held: Friday, 7 November 2014

Back to Outline 36 - Trees. On to Outline 38 - On Two-Dimensional Design.

Summary

We use the techniques that we've learned so far (particularly numeric recursion and GIMP drawing tools) to build some interesting regular images. (You can decide whether or not it's "art".)

Related Pages

• Reading: Geometric Art
• Lab: Geometric Art
• EBoard 37 (Source 37) (HTML 37)

Overview

• Using numeric recursion for making images.
• Parallel lines, concentric circles, and beyond.

Administrivia

• Continue partners. (Those who weren't here on Wednesday can partner.)
• Extended/modified office hours continue this week and next.
• Welcome to any class visitors!

Upcoming Work

• Lab writeup: Exercise 5: http://bit.ly/151-2014F-w37
• Readings for Monday:
  • Design Elements
  • About the Project
• Exam 3 due Tuesday
  • Required prologue due tonight! http://bit.ly/151-2014F-exam3pro
  • Required epilogue due next Wednesday night. http://bit.ly/151-2014F-exam3epi

Cool Upcoming Events on Campus

• Peace studies talk Monday Nov. 10 at 4:15 p.m. in JRC 101 "With All the World’s Violence, Where is Peace?"

Extra Credit Opportunities

Academic

• CS Table TODAY: Open Data.
  12:10-12:50, Day PDR. (Readings available in the back of the room.)
• Scholars' Convocation, noon, Nov. 12: Dean Latham. In fall 2015, Convo returns to its proper time of 11 a.m. Thursday.

Peer Support

• Karan's radio show 11pm Thursday nights on KDIC
• Evan's radio show 5pm Friday nights on KDIC
• Donna's radio show Sunday midnight on KDIC
• The gaming club is hosting a Smash Brothers tournament on Saturday (Loose at 11am ...)
• Swimming on Saturday (1pm) against Luther.

Exam Notes

Are there some questions and answers in yesterday's eboard?

Yes. I've also copied some of them into the exam.

What interesting questions have you seen in the prologue?

Amazingly, most of the people who have responded to the prologue included "start early" in their list of approaches.

Someone asked how many different tests I wrote for problem 2. My "first pass" set of tests explored eleven different issues, including two kinds of preconditions that might be checked.

Many of you seem overly enamored of append, particularly for problem 1. If you are only adding one element to the front of a list, you should probably use cons.

I'm trying to figure out what char-drypot is. Maybe auto-correct.

I appreciate that at least one of you noted that for both problems 5 and problem 6, you were likely to lose a lot of points if you failed to get the turtle back to the original position and orientation.

Should I use direct or helper recursion for problem 1?

It strikes me that direct recursion is better. I forgot to mention it on Wednesday, but if you're building a new list, and you want the elements mostly in the same order, direct recursion is often the way to go.

Can we see pictures for problem 8?

Done.