Noise Wave

//Adapted from dan shiffman's example sketch from the processing website.

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float yoff = 0.0;        // 2nd dimension of perlin noise

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void setup() {

  size(640, 360);

}

​

void draw() {

  background(255, 255, 0); // yellow sky

  //noStroke();

  stroke(0);

  fill(100, 200, 255); // blue water

  // We are going to draw a polygon out of the wave points

  beginShape(); 

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  float xoff = 0;       // Option #1: 2D Noise

  //float xoff = yoff; // Option #2: 1D Noise

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  // Iterate over horizontal pixels

  for (float x = 10; x <= width-10; x += 10) {

    // Calculate a y value according to noise, map to 

    float y = map(noise(xoff, yoff), 0, 1, 200, 300); // Option #1: 2D Noise

    // float y = map(noise(xoff), 0, 1, 200,300);    // Option #2: 1D Noise

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    // Set the vertex

    vertex(x, y); 

    // Increment x dimension for noise 

    xoff += 0.05;

  }

  // increment y dimension for noise

  yoff += 0.01;

  vertex(width-10, height-10);

  vertex(10, height-10);

  endShape(CLOSE);

}