o.O week07

 week07

week07-1

放開滑鼠清除畫面

week07-2

week07-3

week07-4

week07-5

畫橫線會變紅色

week07-6

直線 藍色

week07-7

右下 綠色

week07-8

week07-9

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

void setup(){

  size(400,400);

  background(255);

}

float ghostX=400,ghostY=20;

void mouseDragged(){//按下MOUSE鍵，再拖它

  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 rd=0,green_rightup=0;//右下,右上

  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) rd+=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);

    //ellipse(p.x,p.y,10,10);

    if(green_part1==false&& rd>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;

  }

  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(green_part1) stroke(0,128,0);

  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);

    //ellipse(p.x,p.y,3,3);

  }

  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);

  }  

}