COMP 1671 , Section 1, Fall 2008

Assignment 1

Due September 18, 2008

You are to write a simple simulation in Greenfoot. There are to be two types a sprites, lets call them "A-sprites" and "B-sprites". When your simulation starts there are 10 or more A-sprites on the screen and one B-sprite. The A-sprites are to move about the world randomly, reflecting off of the boundaries. The B-sprite is to be keyboard controlled. When a B-sprite touches an A-sprite the A-sprite is removed. You shoudl be able to capture all the B-sprites. You can use the built in greenfoot actor images if you want, no need to create your own for this assignment.

Hints/suggestions:

• For the A-sprites Use and x-velocity and y-velocity data members and negate them when an x or y boundary is hit.
• First just create then world with the a couple of A-sprites moving around and one stationary B-sprite. Second, make sure the A-sprites bounce off the world boundaries correctly. Third, make the B-sprite be keyboard controlled. Last, detect collisions and remove A-sprites.
• Use the "getOneIntersectingObect() method presented in chapter 3 to detect if the an A-sprite is intersecting a B-sprite. Put this code in the B-sprite act method. If there is an intersection call getWorld().removeOBject() as shown in chapter 3.