Introduction

1. You will choose a programming platform for the quarter and familiarize yourself with RGB color and the ppm format. In part, this assignment is to ensure that you have a method of submitting you work so that I can:
   • read the code
   • compile (or interpret) the code
   • run the code to produce a file in ppm format.

2. You will write your own 3D vector tools (e.g. as a JAVA class) that you will use for your later programming assignments.

Part 1: RGB Triangle

Here are some triangles that were generated by such a program.

RGB at the vertices	Other RGB Colors at the Vertices

• Your program should work with any triangle in your graphics space, e.g. with all vertex coordinates between 0 and 300.
• Your program should work with any RGB colors assigned to the vertices.
• You can get the data for your triangles by:
  • reading the information from a file, or
  • reading mouse clicks, or
  • generating appropriate random numbers.
• You must ouput your image to a ppm file.

Part 2: Vector Tools

• Set and Get the x, y, and z components of a vector.
• Add two vectors
• Subtract one vector from another
• Multiply vector by scalar
• Divide a vector by a non-zero scalar
• Determine whether a vector is zero
• Test whether two vectors are equal
• Compute the dot product of two vectors
• Compute the cross product of two vectors
• Compute the length of a vector
• Normalize a vector
• Compute the angle between two vectors

What to submit
A zipped folder containing one folder for each part of this assignment.

• Triangle Folder
  • your code
  • a readme.txt file containing:
    • instructions on how to run your program
    • what to expect as output
    • data file(s) if required
    • how I can change the triangles and their colors
    • anything that causes your program to crash
  • NOTHING ELSE
• Vector Folder
  • your code
  • a readme.txt file containing:
    • instructions on how to run your program
    • what to expect as output
    • anything that causes your program to crash

How to submit
Email your zipped work as an attachment to fell@ccs.neu.edu with Subject: CSG140SP07-prog0.

Due
By midnight Tuesday, January 23

Grading
These grading guidelines will be used for all programming assignments:
Your project will be graded on:

• correctness (60%).
• style of your program (10%) (20% for part 2)
• documentation:
  • inline comments (10%)
  • README (10%)
• quality of the resulting image(s). (10%) (0% for part 2)

Some points may be subtracted (up to 10%) if you need substantial help from the TA or professor to make your program run.

The penalty for a late homework is 5% per calendar day for up to one week late.
No homework will be accepted later than that.

Last Updated:
The URL for this document is: http://www.ccs.neu.edu/home/fell/CSG140/Assignments/CSG140SP2007prog0.html