Add random walk that follow mouse

random_walk_follow_mouse/random_walk_follow_mouse.pde

@@ -0,0 +1,60 @@
+
+int EQUILIBRE = 3;
+int SUD_EST = 4;
+int BALADE = SUD_EST;
+
+class Walker {
+  int x;
+  int y;
+  
+  Walker() {
+    x = width / 2;
+    y = height / 2;
+  }
+  
+  void display() {
+    stroke(0);
+    point(x, y);
+  }
+  
+  boolean follow_the_mouse(float random) {
+    return random < 0.5;  
+  }
+  
+  void step() {
+    float random = random(1);
+    if (follow_the_mouse(random)) {    
+      int x_direction = (mouseX - x);
+      int y_direction = (mouseY - y);
+      
+      if (x_direction != 0) {
+        x_direction /= abs(x_direction);
+      } 
+      if (y_direction != 0) {
+        y_direction /= abs(y_direction);
+      }
+      
+      x += x_direction;
+      y += y_direction;
+    } else {
+      x += int(random(-2, 2));
+      y += int(random(-2, 2));
+    }
+
+    x = constrain(x, 0, width-1);
+    y = constrain(y, 0, height-1);
+  }
+}
+
+Walker w;
+
+void setup(){
+  size(640, 360);
+  w = new Walker();
+  background(255);
+}
+
+void draw() {
+  w.step();
+  w.display();
+}