CS 340 - Spring 2005

CS 340 Spring 2005: Assignments and Projects

Project 3 (due May 19th)
Project 2 (due April 4th)
Project 1 (due March 2nd)
Assignment 4: In this assignment you will extend the code from Assignment 2 to visualize a set of segments in a 2D top-down view (that is, using the default OpenGL viewpoint and projection).
Your program should take a single command line argument, the name of the input ascii file containing the segments. The format of the input file is as follows:
```
 
x1 y1 x2 y2 
x1 y1 x2 y2 
x1 y1 x2 y2 
...  
```
where x1, y1, x2, y2 are floating point numbers and (x1,y1) and (x2,y2) represent the coordinates of the two endpoints of the segment.
When invoked with a wrong number of arguments your program should display a help message like a standard unix command. Your program should handle correctly the situations when the input file does not exist and other possible error scenarios.
Include a menu that allows to select a color for the segments, toggles between two line patterns (pick two, say continuous and dotted line), and allows to quit.
Note: Your display function will be called every time the window needs to be redrawn; if you read the segments from the file every single time, that will be very inneficient! You will need to read the segments into a structure in memory.
Extra work (leading into the first project): Implement keyboard options to translate left and right. (with a predefined distance) and to zoom in and out.
Extra note: the due date is firm. Monday before class!
Assignment 3: The goal of this assignment is to get you acquainted with OpenGL and GLUT. Write a program to draw a simple scene containing a set of polygonal objects. The program should have the following features:
- Inlude at least one polygon.
- One of the polygons must have vertices of different colors.
- Use at least a for loop to get non-trivial objects. You could, for instance, try to draw a fan of lines, a wheel, a circle, a flower, a comb.
- Include a menu that toggles between drawing the polygons in your scene filled or contour only. Also, the menu should allow to Quit. Do not submit your code. We will demo it in class on Monday!
Assignment 2: Write a program that reads an ascii file containing the (x,y) coordinates of segments, shifts the and writes them to an ascii output file. The shift amount and the name of the input and output file should be command line arguments. The interface of your program should work as follows:
The format of the input file is as follows:
```
x1 y1 x2 y2
x1 y1 x2 y2
x1 y1 x2 y2
...
```
where x1, y1, x2, y2 are floating point numbers and (x1,y1) and (x2,y2) represent the coordinates of the two endpoints of the segment.
When you run your program it should like something like this:
```
%./shiftseg
usage: shiftseg < fin > < fout > < sx > < sy >
< fin >=input file name
< fout >=output file name
< sx >=shift amount x
< sy >=shift amount y
%./shiftseg f1 foo 2.3 4.5
reading input file f1.
creating file foo.
done. total segments=...
```
Your program should handle correctly the case when the input file does not exist or other special cases that may occur.
For example on using command line arguments and file I/O check out fileseg.tar.
Input test files: here.
Assignment 1: Implement a first-in first-out doubly linked queue using the following specification: qlistspec.tar Fill in the functions in lqueue.c so that when you run the output you get this. You may not change lqmain.c. You may want to use a dummy head; this will avoid all special cases of insert and delete, and is more elegant!