Golden Ration Interactive Spirals_single

/*

Program Title: A2-2

 Program Description:Write a procedure for drawing a simple character with at least two different parameters and use your

 procedure at least three times with different values of its parameters.

 By Jillian Warren, September 28, 2012

 Comments: IAT 800 - Assignment 2 

 **Inspiration from: http://krazydad.com/tutorials/circles_js/

 */

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//***Global variables

float goldenRatio = (sqrt(5)+1)/2 - 1;  // golden ratio

float goldenAngle = goldenRatio * TWO_PI;  // golden angle

float largeRadius;

float ratio;

float sinCosAngle;

float xCenter;

float yCenter;

float spiralRadius;

​

​

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//***to be executed once

void setup () {

  size (1200, 800);

  background (255); // white

  smooth();

  frameRate (5);

  ellipseMode (RADIUS);

  fill (0);

}//end setup

​

​

​

//*** procedure to draw spiral characters. Arguements: numberofCircles used for # of circles that makes up spiral, circle size dictates

// size of circles that make up spiral, xPos and yPos are used in determination of location of circles and therefore overall spiral

void drawSpirals (int numberOfCircles, int circleSize, int xPos, int yPos) {

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  //initialize

  largeRadius = width * random (.10, .30); // used for radius of the whole spiral

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  //create circles spiraling outward to create full spiral

  for (int i = 1; i <= numberOfCircles; ++i) {

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    ratio = i/ (float) numberOfCircles;

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    sinCosAngle = i*goldenAngle;

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    spiralRadius = ratio * largeRadius;

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    xCenter = xPos + cos(sinCosAngle) * spiralRadius;

    yCenter = yPos + sin(sinCosAngle) * spiralRadius;

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    ellipse (xCenter, yCenter, circleSize, circleSize);

  }//end for

}//end drawSpirals

​

​

void draw () {

//  changeColor();

  noStroke();

  fill(0, 40);

  drawSpirals (400, 4, width/2, height/2);

  // delay (100);  //only works in processing on the desktop

}//end draw

​

void mousePressed () {

   background (255);

}