a port of the Processing Visualization Language

SimpleCurves

Simple curves are drawn with simple equations. By using numbers with values between 0 and 1 in the equations, a series of elegant curves are created. The numbers are then scaled to fill the screen.

Original Processing.org Example: SimpleCurves

// All Examples Written by Casey Reas and Ben Fry

// unless otherwise stated.

void setup() {

  size(200, 200);

  colorMode(RGB, 100);

  background(0);

  noFill();

  noLoop();

}



void draw() {

  stroke(40);

  beginShape();

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

   vertex(i, singraph((float)i/width)*height);

  }

  endShape();

  

  stroke(55);

  beginShape();

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

   vertex(i, quad((float)i/width)*height);

  }

  endShape();

  

  stroke(70);

  beginShape();

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

   vertex(i, quadHump((float)i/width)*height);

  }

  endShape();

  

  stroke(85);

  beginShape();

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

   vertex(i, hump((float)i/width)*height);

  }

  endShape();

  

  stroke(100);

  beginShape();

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

   vertex(i, squared((float)i/width)*height);

  }

  endShape();

}



float singraph(float sa) {

  sa = (sa - 0.5) * 1.0; //scale from -1 to 1

  sa = sin(sa*PI)/2 + 0.5;

  return sa;

}



float quad(float sa) {

  return sa*sa*sa*sa;

}



float quadHump(float sa) {

  sa = (sa - 0.5); //scale from -2 to 2

  sa = sa*sa*sa*sa * 16;

  return sa;

}



float hump(float sa) {

  sa = (sa - 0.5) * 2; //scale from -2 to 2

  sa = sa*sa;

  if(sa > 1) { sa = 1; }

  return 1-sa;

}



float squared(float sa) {

  sa = sa*sa;

  return sa;

}
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