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Problem Set 3 - UBC - CPSC CA$7.23   Add to cart
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  3. University Of British Columbia (UBC )
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  5. Computer Science
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  7. CPSC 110 (CPSC110)

Class notes

Problem Set 3 - UBC - CPSC

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Completed file for problem set 3. Remember to copy the pdf file to Dr Racket for a better view. This file should be exactly identical except that the file has answers for each problems.

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  • December 20, 2022
  • 11
  • 2023/2024
  • Class notes
  • Gregor kiczales
  • All classes

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;; DO NOT PUT ANYTHING PERSONALLY IDENTIFYING BEYOND YOUR
CWL IN THIS FILE.
;; YOUR CWLs WILL BE SUFFICIENT TO IDENTIFY YOU AND, IF YOU HAVE
ONE, YOUR
;; PARTNER.
;;

(require 2htdp/image)
(require 2htdp/universe)
(require spd/tags)

(@assignment psets/pset-03);Do not edit or remove this tag

;; If you are:
;; - A 110 or 107 student replace the first set of '???'s with your cwl.
;; For problem sets, If you have a partner, please replace the second
;; set of '???'s with their cwl. Remember this, it is what you will
;; do with these @cwl annotations for the whole course.
;; - A UBC Extended Learning student, replace the first set of ??? with
;; your email address as confirmed in the email you received from
;; extended learning. The handin password is also in that email.
;; Remember this, it is what you will do with these @cwl annotations
;; for the whole course.
;;
(@cwl ??? ???)

;; Bounce a single ball around the screen.

;; IMPORTANT:
;; This problem set will form the basis for problem sets 4 and 5 as well.
;; You are strongly advised to put in the effort to do well on this
;; problem set so that you then have an easier time with problem sets
;; 4 and 5.
;;

;; For this problem set you must complete the design of a world program.
;; The complete program must have the following behaviour:
;; - there is a green background, with a single white ball
;; bouncing around inside that box
;; - when the ball hits the top/right/bottom/left of the box it
;; bounces in the usual way a ball would bounce off of a wall

, ;; - clicking the mouse replaces the ball with a new ball, at the
;; current mouse position, and with a small random x,y velocity
;;
;; Note that we are giving you significant help in the starter file.
;; There is a complete data design, some complete helper functions, as
;; well as a some wish list entries. You absolutely MUST
;; - not edit any of the complete design elements we give you
;; - complete the wish list entries we give you, and do so in a way
;; that is consistent with the rest of the design we give you
;; - must use the helpers we give you as part of your solution
;;
;; We recommend that you begin by first going through the entire file to
;; understand what is already complete and what you need to complete.
;;
(@problem 1)
(@htdw Ball)

;; Constants:
(define WIDTH 605)
(define HEIGHT 535)

(define BALL-RADIUS 10)

(define TOP (+ 0 BALL-RADIUS)) ;these constants define the "inner box"
(define BOT (- HEIGHT 1 BALL-RADIUS)) ;that constrains the center of the ball
(define LEF (+ 0 BALL-RADIUS)) ;
(define RIG (- WIDTH 1 BALL-RADIUS)) ;

(define BALL (circle BALL-RADIUS "solid" "white"))

(define MTS (rectangle WIDTH HEIGHT "solid" "green"))


;;
============================================================
===============
;;
============================================================
===============
;; Data definitions:

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