int maxSpawnPoints = 30;
int mouseAwareness = 50;
int pulseRate = 200;
color randomColor;
Particles[] fountain = new Particles[maxSpawnPoints];

int mousePosX, mousePosY;
int oldMousePosX, oldMousePosY;
int notMoved;
boolean mouseWithin;





class Particles {  
  int[] posX = new int[height];
  color[] individualColor = new color[height];
  
  Particles(int Y, color setColor) {    
    for (int y=0; y<height; y++) {
      this.posX[y] = Y;      
      /*
      this.individualColor[y] = color(int(random(0,255)),int(random(0,255)),int(random(0,255)));*/
      this.individualColor[y] = setColor;
    }    
  }

  
    
        
  void move() {   
  
    /* pass onto values from the very end to the very beginning */
    for (int y=0; y<height-1; y++) {
      mouseEvents(); 
      
      /* if the mouse is within a specific range, move away from it                
             X-M X+
               Y+      <----------- checks vicinity of the mouse */
      if ((this.posX[y+1] <= mousePosX+mouseAwareness) && (this.posX[y+1] >= mousePosX-mouseAwareness) && (y <= mousePosY+mouseAwareness) && (y > mousePosY)) {
        if (this.posX[y] < mousePosX) {
          this.posX[y]=this.posX[y+1]-1;
        } else if (this.posX[y] > mousePosX) {
          this.posX[y]=this.posX[y+1]+1;
        } else if (this.posX[y] == mousePosX) {
          if (random(0,1)==0) {
            this.posX[y]=this.posX[y+1]+1;
          } else {
            this.posX[y]=this.posX[y+1]-1;
          }
        }
      } else {
        this.posX[y] = this.posX[y+1]+int(random(-2,2));
      }
    }
    
    /* gives a new value for the lowest height. offset by -1,0, or 1 (non-inclusive) */
    this.posX[height-1] = this.posX[height-1]+int(random(-2,2));    
  }
  
  void display() {
    for (int y=0; y<height; y++) {
      
      checkChanges();
          
      if ((this.posX[y] == mousePosX) && (y == mousePosY)) {
        println("Impact occured with array: "+y+" at "+mousePosX);        
        /* kill the impacted particle */
        this.posX[y] = -400;
      }    
          
      set(this.posX[y], y, this.individualColor[y]);      
      
      /*
      fill(this.individualColor[y]);
      stroke(0,0,0);
      ellipse(this.posY[y],y,10,10);*/
    }
    mouseDraw();
  }
}







void setup() {
  int setY;
  
  setY=25;

  size(800,600);  
  background(0,0,0);
  /*framerate(60);*/  
  for (int a=0; a<maxSpawnPoints; a++) {   
    randomColor = color(int(random(0,255)),int(random(0,255)),int(random(0,255)));
    /* fountain[a] = new Particles(int(random(0,width)),randomColor); */    
    fountain[a] = new Particles(setY,randomColor);
    setY+=25;
  }
  
  for (int y=0; y<height; y++) {
    for (int a=0; a<maxSpawnPoints; a++) {
      mouseEvents();
      fountain[a].move();
    }
  }
}









void mouseEvents() {
  oldMousePosX = mousePosX;
  oldMousePosY = mousePosY;
  mousePosX = mouseX;
  mousePosY = mouseY;
}

void mouseDraw() {
  if ((oldMousePosX != mousePosX) || (oldMousePosY != mousePosY) || (notMoved == pulseRate)) {
    if (notMoved == pulseRate) {
      notMoved = 0;
    }
      
    fill(0,0,255,50);
    stroke(255,255,255);
    /*ellipse(mousePosX,mousePosY,20,20);*/
    ellipse(mousePosX,mousePosY,mouseAwareness*2,mouseAwareness*2);
    set(mousePosX,mousePosY,color(255,255,255,255));
  }
  
  notMoved++;
}

void checkChanges() {
  if ((keyPressed == true) && (key == CODED)) {    
    if ((keyCode == UP) && (mouseAwareness<width) && (mouseAwareness<height)) {
      mouseAwareness++;
      println("UP: Changed mouseAwareness to: "+mouseAwareness);
    } else if ((keyCode == DOWN) && (mouseAwareness > 1)) {
      mouseAwareness--;
      println("DOWN: Changed mouseAwareness to: "+mouseAwareness);
    }
    keyPressed = false;
    mouseDraw();
  }  
}

void draw() {
  fill(0,0,0,10);
  rect(0,0,width,height);
  
  mouseWithin = ((0 < mousePosY) && (0 < mousePosX) && (mousePosY < height) && (mousePosX < width));
   
  for (int a=0; a<maxSpawnPoints; a++) {    
    fountain[a].move();
    fountain[a].display();    
  }
 
  noStroke();
}