RenaissanceBug

#lang racket
#|
Little audio player to demo switching between recordings with
the rsound library.

Create two .wav files, define your constants MUSIC-DIR, SONG1, SONG2,
and run in DrRacket.

Controls: press 1 to start looping SONG1, 2 to start looping SONG2,
             or Esc to kill the audio.

RenaissanceBug

#lang racket/base

(require 2htdp/image
         lang/posn
         racket/match)

;; Given: I've got three colors of paint, and the wall is painted light blue.
(define blue (make-color #x66 #xcc #xff))
(define purple (make-color #x66 #x33 #xff))
(define orange (make-color #xff #xcc #x33))

RenaissanceBug

#lang typed/racket/base

#|
Drawing function graphs on a circle, in modular arithmetic.
jmj, 8 June 2015.

See also:
  http://stephanainley.com/shapes2/#
  http://blog.recursiveprocess.com/2015/04/28/linear-modulus-art/
|#

RenaissanceBug

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

; Sun and background
(define SPACE (rectangle 900 900 "solid" "black"))
(define SUN (star 20 "solid" "gold"))

;Key
; (+ [center of ellipse] (* [determines width/height of ellipse] 
;    (cos (/ fn [adjusts the speed of rotation])))))

RenaissanceBug

#lang racket

;; Bezier curve drawing.  jmj, 4/22/10.
;; Illustrates using posns to represent 2d locations, and drawing using 2htdp/image library.
;; Test cases removed.

(require 2htdp/image)

(define BG (rectangle 220 150 'solid 'white))

RenaissanceBug

#lang racket

#|
Symbolic differentiation:
An example of higher-order functions in math. Includes:
 * Basic function constructors:
  - identity
  - constant functions for several small numbers
  - power-functions (x^n for given n)
 * Functions of functions, or function combinators:

RenaissanceBug

#lang racket

#| Generator for times-table images for modular arithmetic. 
   jmj (jjohnson@kirby.org), 12 Nov 2013

   Based on a discussion at the Monterey Bay Area Math Teachers' Circle.
|#

(require 2htdp/image)