91 week07

 畫一個背景，滑鼠畫黑線放開消失:

void setup(){
  size(400,400);
}
void draw(){
  if(mousePressed)line(mouseX,mouseY,pmouseX,pmouseY);
}
void mouseReleased(){
  background(255);
}

畫鬼走向人物:

void setup(){
  size(400,400);
  background(255);
}
float ghostX=400,ghostY=20;
void draw(){
  ellipse(200,200,15,15);
  if(mousePressed)line(mouseX,mouseY,pmouseX,pmouseY);
  ellipse(ghostX,ghostY,15,15);
  float dx=200-ghostX,dy=200-ghostY,len=sqrt(dx*dx+dy*dy);
  ghostX+=dx/len/3;
  ghostY+=dy/len/3;
}
void mouseReleased(){
  background(255);
}
畫點有殘影，沒有:
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);
  ellipse(200,200,15,15);
  //if(mousePressed)line(mouseX,mouseY,pmouseX,pmouseY);
  for(int i=0;i<pt.size();i++){
    PVector p = pt.get(i);
    ellipse(p.x,p.y,3,3);
  }
  ellipse(ghostX,ghostY,15,15);
  float dx=200-ghostX,dy=200-ghostY,len=sqrt(dx*dx+dy*dy);
  ghostX+=dx/len/3;
  ghostY+=dy/len/3;
}
void mouseReleased(){
  background(255);
}
資料結構，滑鼠放開用remove:
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);
  ellipse(200,200,15,15);
  //if(mousePressed)line(mouseX,mouseY,pmouseX,pmouseY);
  for(int i=0;i<pt.size();i++){
    PVector p = pt.get(i);
    ellipse(p.x,p.y,3,3);
  }
  ellipse(ghostX,ghostY,15,15);
  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);
  }
}
變成畫線，到過來迴圈，+1-1對消:
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);
  ellipse(200,200,15,15);
  //if(mousePressed)line(mouseX,mouseY,pmouseX,pmouseY);
  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(ghostX,ghostY,15,15);
  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);
  }
}
累積x的移動量、y的移動量變顏色，加粗，如果橫線就變紅色，其餘黑線:
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);
  ellipse(200,200,15,15);
   ellipse(ghostX,ghostY,15,15);
  strokeWeight(4);
  float dpx=0,dpy=0;
  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(dpx>100&&dpy<40) stroke(255,0,0);
    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);
  }
}
多一條藍色線，使人物跟鬼變細和不要變色:
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;
  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(dpx>100&&dpy<40) stroke(255,0,0);
    else if(dpx<40&&dpy>100) stroke(0,0,255);
    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);
  }
}
增加右下變綠線，但是太快會跑不出來:
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;
  int rightdown=0;
  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++;
  }
    if(dpx>100&&dpy<40) stroke(255,0,0);
    else if(dpx<40&&dpy>100) stroke(0,0,255);
    else if(rightdown>30) stroke(0,255,0); 
    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);
  }
}
小修改綠線變色:
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;
  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(dpx>100&&dpy<40) stroke(255,0,0);
    else if(dpx<40&&dpy>100) stroke(0,0,255);
    else if(rightdown>150) stroke(0,255,0); 
    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);
  }
}
修改成勾勾才會變綠色:
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,rightup=0;
  boolean green_part1=false,green_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(p2.x-p.x>0&&p2.y-p.y<0) rightup +=sqrt(dpx*dpx+dpy*dpy);
    ellipse(p.x,p.y,10,10);
    if(green_part1==false&&rightdown>150) green_part1=true;
    else if(green_part1==true&&rightup>150) green_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 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);
  }
}
修改成限定往右下角的勾勾，其他勾勾還不能辨識不會變色:
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;
  boolean green_part1=false,green_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);
    ellipse(p.x,p.y,10,10);
    if(green_part1==false&&rightdown>150) green_part1=true;
    else if(green_part1==true&&green_rightup>150) green_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(green_part1) stroke(0,128,0);
    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);
  }
}
增加另外一種勾勾變黃線:
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);
  }
}