//TODO: change colors, perhaps pixel by pixel?
//TODO: chill out critter scare
//-----decreasing probability over distance



int SCREENSIZE = 300;
int CRITTERCOUNT = 75;
int CRITTERWIDTH=8;
int CRITTERHEIGHT=10;
critter c[]; 
int count; 
void setup(){
  size(300,300);
  c = new critter[CRITTERCOUNT*10];

frameRate(30);

   for(int h = 1; h <= 7; h++){     
    PImage leftdown = loadImage(h+"-down-l.gif");    
    PImage rightdown = loadImage(h+"-down-r.gif");    
    PImage leftup = loadImage(h+"-up-l.gif");    
    PImage rightup = loadImage(h+"-up-r.gif");  
    
      
          
    for(int i = 0; i < CRITTERCOUNT; i++){
      c[count++] = new critter(random(SCREENSIZE),random(SCREENSIZE),leftdown,rightdown,leftup,rightup);
    }
  }

}



void draw(){
  background(4,66,90);
    for(int i = 0; i < count; i++){
      c[i].move(mouseX,mouseY);
      c[i].show();
    }
}



class critter {
  float x, y;
  PImage imgLeftDown, imgLeftUp, imgRightDown, imgRightUp;
  boolean isStopped = false;
 boolean isScared = false;
   boolean nowUp = true;
  
  PImage img;
  
  float xspeed = 0;
  float yspeed = 0;
  
  float frozX, frozY;
  
  critter(float inX, float inY, PImage inLeftDown,PImage inRightDown, PImage inLeftUp, PImage inRightUp){
    x = inX;
    y = inY;
    imgLeftDown = inLeftDown;
    imgRightDown = inRightDown;
    imgLeftUp = inLeftUp;
    imgRightUp = inRightUp;
    img = inRightUp;
  }

  void show(){
if(! isStopped) nowUp = ! nowUp;
        
      if(xspeed <= 0) {
        if(nowUp)
        img = imgLeftUp;
        else
          img = imgLeftDown;
      }
      if(xspeed > 0){
        if(nowUp)
        img = imgRightUp;
        else
          img = imgRightDown;
      }
  
        image(img,x,y);
  }

boolean between(int val, int lower, int higher){
  if(val >= lower && val <= higher){
    return true;
  }
  return false;
}

  void move(int mx, int my){
    int ccX = (int)x+(CRITTERWIDTH/2);
    int ccY =(int) y+(CRITTERHEIGHT/2);
    int cRight = (int)x+CRITTERWIDTH;
    int cBottom = (int)y+CRITTERHEIGHT;
    
    if(mousePressed){
      if(! isStopped){
        if((between(mx,(int)x,cRight) && between(my,(int)y,cBottom))){
          isStopped = true;
          isScared = true;
          frozX = mx; frozY = my;
       } //end else (not frozen now) 
      } // end not previously stopped 
      else { //previously stopped
              x = x + (mx-frozX);
        y = y + (my-frozY);
        frozX = mx;
        frozY = my;

      }
    } // end if mouse pressed
    else {
      isStopped = false;
    }
 
    if(! isStopped){
       float d = sqrt(  pow((mx - ccX),2) + pow((my-ccY),2 ));
      //println(d);
      if(d < 60 && random(100) < (60-d) ){      
        //line(mx,my,ccX,ccY);  
        isScared = true;
 
   
        if(mx < ccX){
          xspeed = 1;
        } else {
         xspeed = -1;
        }
        if(my < ccY){
          yspeed = 1;
        } else {
          yspeed = -1;
        }
       }//end if random
       else {
         isScared = false;
       }
   
     
      
    } 
         
             
                 
                         
    if(! isStopped && ! isScared){
 
      if(int(random(3)) == 0){
        xspeed = int(random(0,1)*3)-1;
      
      }
      if(int(random(3)) == 0){
        yspeed = int(random(0,1)*3)-1;
      }
    }
     if(! isStopped){ 
           
      x += xspeed; //random(-1,1);
      y += yspeed; random(-1,1);

    
      x = constrain(x, 0, SCREENSIZE-CRITTERWIDTH);
      y = constrain(y, 0, SCREENSIZE-CRITTERHEIGHT);
    

    }
    }

}