Lecture 11

Computer Science 112
The Art & Science of Computer Graphics

Fall 2015, The College of Saint Rose

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Lecture 11: Colors and Materials
Date: Wednesday, October 7, 2015

Agenda

Announcements
Lecture 9 assignment recap
Color
- RGB
- HSV
Materials
- predefined material types
- all material properties
Looking ahead: you will be creating a model of a marble starting on Friday. Think about what you'd like your marble to look like. Many previous marbles have been made of glass materials with some design visible on the inside.

Due at the start of class, Friday, October 9.

Please submit answers to these questions either as a hard copy (typeset or handwritten are OK) or by email to terescoj AT strose.edu by the start of class. Please use a clear subject line when submitting by email (e.g., CSC 112 Lecture 11 Assignment , Joe Student). We will discuss these questions at the start of class, so no late submissions are accepted.

Fill in the missing entries in the following table. (8 points, (1)/(2) each)

HSV	RGB	Common Name
		Blue
(33, 0, .5)
(33, .5, 0)
	(0, 1, 0)
		Pink
(270, 1, 1)
	(1, 1, 0)
	(0.5, 0.5, 0.5)

Work through this carefully and make sure you understand it when we go over it in class. There will be a question on the first exam which is exactly this, just with different colors.

Terminology

RGB, Red-Green-Blue
primary colors of light
secondary colors of light
HSV, Hue-Saturation-Value

Examples

On the Wiki: Plasterandplastic, Downloadable file: plasterandplastic.py
On the Wiki: Materialsplayroom, Downloadable file: materialsplayroom.py

Links

An applet for color space conversions: http://www.cs.rit.edu/~ncs/color/a_spaces.html (By Nan C. Schaller, Rochester Institute of Technology)
The Colors page on the wiki: http://ascg-wiki.teresco.org/index.php/Colors