Add noise to sea side

Processing/sea_side/sea_side.pde

@@ -3,40 +3,80 @@ color rock_color;
 float seed;
 int perlin_octave;
 
-import processing.opengl.*;
 
 void setup() {
-  size(1000, 700, OPENGL);
+  size(screen.width, screen.height  );
   colorMode(HSB, 360.0, 1.0, 1.0);
   background_color = color(180.0, 0.07, 0.85);
   background( background_color);
   seed = 0.0;
   rock_color = color(228, 0.79, 0.42);
-  perlin_octave = 1;
+  perlin_octave = 3;
   noiseDetail(perlin_octave);
   noStroke();
+  draw_mountain_range();
 }
 
 void mousePressed() {
   seed += 999;
   perlin_octave ++ ;
   noiseDetail(perlin_octave);
+  add_noise();
+  //save("noise_sea.png");
+}
+
+void draw() {
+  // add_noise();
+  draw_mountain_range();
+
+  add_noise();
+}
+
+int coord(int x, int y) {
+  int x_ = x % width;
+  if (x_ < 0) { 
+    x_ += width;
+  }
+
+  int y_ = y % height;
+  if (y_ < 0) { 
+    y_ += height ;
+  }
+  return x_ + width* y_;
+}
+
+void add_noise() {
+  loadPixels();
+
+
+  for ( int x=0 ; x < width; x++) {
+    for (int y=0; y< height;y++) {
+      color i = pixels[coord(x, y)];
+      pixels[coord(x, y)] = color(
+      hue(i), // + random(-3,3),
+      saturation(i) +random(-0.02, 0.02), 
+      brightness(i) +random(-0.02, 0.02) 
+        );
+    }
+  }
+
+  updatePixels();
+  // filter(BLUR, 0.4);
+  //filter(DILATE);
 }
 
 void draw_montain_line(float y) {
   fill(  color(228, 0.79, 1.0- 0.8 * y/height));
 
   beginShape();
-  vertex(0, 0);
+  vertex(0, 50);
   int step = 1;
   for (int x = 0; x < width - step ; x+=step ) {
-    float y_noise = 160* noise(0.01* x, y+seed);
+    float y_noise = 260* pow( noise(0.01* x, 0.02* y, seed), 1.2);
     vertex(x, - y_noise);
   }
-  vertex( width, 0);
-  vertex( width, 0);
+  vertex( width, 50);
   endShape(CLOSE);
-
 }
 
 void draw_montain_curve() {
@@ -60,16 +100,15 @@ void draw_montain_curve() {
   println( "narf" + seed );
 }
 
-void draw() {
+void draw_mountain_range() {
   background( background_color);
   pushMatrix();
   int y_step = 40;
-    for (int y = 100; y <= height + y_step; y += y_step) {
+  for (int y = 100; y <= height + 2*y_step; y += y_step) {
     translate(0, y_step);
     draw_montain_line(y);
   }
   popMatrix();
-  seed += 0.01;
-
+  seed += 0.005;
 }