a port of the Processing Visualization Language

Functions

The draw_target() function makes it easy to draw many distinct targets. Each call to draw_target() specifies the position, size, and number of rings for each target.

Original Processing.org Example: Functions

// All Examples Written by Casey Reas and Ben Fry

// unless otherwise stated.

void setup() 

{

  size(200, 200);

  background(51);

  noStroke();

  smooth();

  noLoop();

}



void draw() 

{

  draw_target(68, 34, 200, 10);

  draw_target(152, 16, 100, 3);

  draw_target(100, 144, 80, 5);

}



void draw_target(int xloc, int yloc, int size, int num) 

{

  float grayvalues = 255/num;

  float steps = size/num;

  for(int i=0; i<num; i++) {

    fill(i*grayvalues);

    ellipse(xloc, yloc, size-i*steps, size-i*steps);

  }

}
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