CS 231 Lab 3: Drawing Constellations

For this assignment you should write a set of classes including Star, Constellation and Edge. Between these, you should implement methods that will allow you to draw a picture of a constellation in a DrawingPanel (you can download the code for this from the textbook website's supplement section).

You should have data for the stars part of the constellation from the last lab.

You should be able to do most of this from what you saw in lecture (well, by Wednesday's lecture!), but here are some tips and pointers to remind you about some of the tricky parts:

• each of the three classes (Star, Edge and Constellation) should have a public void paint(...) method which takes a Graphics parameter (traditionally called g). You can pass the graphics parameter in to the original constellation paint method, which can then "pass the buck" (i.e., the graphics parameter) in to each of the star and edge paint methods.
  (In order for this to work, and to have access to colors, you will want to add the statement "import java.awt.*;" at the top of each file, outside/above the class definition.)
• Remember that the y axis runs "backwards", so that aero is at the top of the screen or window. Also, you may want to scale the numbers you've used to define the positions and magnitudes of the stars so that they look good in the window.
• Recall, too, that the various drawing methods take ints, not doubles, so you may need to convert them using a typecast of the form "(int) expression.