Lecture 13

Computer Science 112
The Art & Science of Computer Graphics

Fall 2015, The College of Saint Rose

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Lecture 13: Lighting
Date: Wednesday, October 14, 2015

Agenda

Announcements
- Exam in 1 week: details on previous lecture page, review time Friday
- Studio/Lab 5: Marbles now due
- Studio/Lab 6: Modeling with Realistic Materials continues
Lecture 12 assignment recap
Lighting
- Light objects
- Spotlight objects
Lab work time

Due at the start of class, Friday, October 16.

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 13 Assignment , Joe Student). We will discuss these questions at the start of class, so no late submissions are accepted.

Experiment with properties of Light and Spotlight objects. You may develop a simple new model for this, or start with an existing model from a class example or something you have developed. (10 points)
Run the following example code and explain why the lighting in the image is as you see in the generated image. Be sure to give the exact position of the bulb in your explanation. (5 points)
```
from ambrosia import *
scene.clear()
scene.add(Plane(), translate(0,-50,0), whitePlaster)
scene.add(cone, redPlaster)
scene.add(bulb, translate(0,200,-300)*yRot(90))
camera.shoot()
```

Terminology

spotlights
radius of a spotlight
falloff of a spotlight

Examples

On the Wiki: Whitecubeinbluelight, Downloadable file: whitecubeinbluelight.py
On the Wiki: Spotlights, Downloadable file: spotlights.py