温 week07

 ArrayList<PVector> pt=new ArrayList<PVector>();

void setup(){
  size(400,400);
  background(255);
}
float ghostX=400,ghostY=20;
void mouseDragged(){
  pt.add(new PVector(mouseX,mouseY));
}
void draw(){
  background(255);
  strokeWeight(1);
  stroke(0);ellipse(200,200,15,15);
  stroke(0);ellipse(ghostX,ghostY,15,15);
  strokeWeight(4);
  float dpx=0,dpy=0;
  float rightdown=0,green_rightup=0;
  float rightup=0,yellow_rightdown=0;
  boolean green_part1=false,green_ok=false;
  boolean yellow_part1=false,yellow_ok=false;
  for(int i=0;i<pt.size()-1;i++){
    PVector p = pt.get(i),p2=pt.get(i+1); 
    dpx+=abs(p2.x-p.x);
    dpy+=abs(p2.y-p.y);
    if(p2.x-p.x>0&&p2.y-p.y>0) rightdown +=sqrt(dpx*dpx+dpy*dpy);
    if(green_part1&&p2.x-p.x>0&&p2.y-p.y<0) green_rightup +=sqrt(dpx*dpx+dpy*dpy);
    if(p2.x-p.x>0&&p2.y-p.y<0) rightup +=sqrt(dpx*dpx+dpy*dpy);
    if(yellow_part1&&p2.x-p.x>0&&p2.y-p.y>0) yellow_rightdown +=sqrt(dpx*dpx+dpy*dpy);
    if(green_part1==false&&rightdown>150) green_part1=true;
    else if(green_part1==true&&green_rightup>150) green_ok=true;
    if(yellow_part1==false&&rightup>150) yellow_part1=true;
    else if(yellow_part1==true&&yellow_rightdown>150) yellow_ok=true;
  }
    println(rightdown);
    if(dpx>100&&dpy<40) stroke(255,0,0);
    else if(dpx<40&&dpy>100) stroke(0,0,255);
    else if(green_ok) stroke(0,255,0);
    else if(yellow_ok) stroke(255,255,0);
    else stroke(0);
    for(int i=0;i<pt.size()-1;i++){
    PVector p = pt.get(i),p2=pt.get(i+1);
    line(p.x,p.y,p2.x,p2.y);
  }
  float dx=200-ghostX,dy=200-ghostY,len=sqrt(dx*dx+dy*dy);
  ghostX+=dx/len/3;
  ghostY+=dy/len/3;
}
void mouseReleased(){
  for(int i=pt.size()-1;i>=0;i--){
    pt.remove(i);
  }
}