上課內容

void setup(){
  size(300,300);
}
void draw(){
  background(#002966);
  fill(#b7efff);
  noStroke();
  ellipse(100,150,13,13);
  ellipse(200,150,13,13);
}
void setup(){
  size(300,300);
}
float x=200,y=150;
void draw(){
  background(#002966);
  stroke(#b7efff);
  line(100,150,x,y);
  fill(#b7efff);
  noStroke();
  ellipse(100,150,13,13);
  ellipse(x,y,13,13);
  if(! mousePressed){
    float dx=x-100,dy=y-150;
    float len=sqrt(dx*dx+dy*dy);
    x-=dx*(len-100)/len;
    x-=dx*(len-100)/len;
  }
}
void mouseDragged(){
  x=mouseX;y=mouseY;
}


void setup(){
  size(300,300);
}
float x=200,y=150;
float vx=0,vy=0;
void draw(){
  background(#002966);
  stroke(#b7efff);
  line(100,150,x,y);
  fill(#b7efff);
  noStroke();
  ellipse(100,150,13,13);
  ellipse(x,y,13,13);
  if(! mousePressed){
    float dx=x-100,dy=y-150;
    float len=sqrt(dx*dx+dy*dy);
 
    vx -=dx*(len-100)/len*0.001;
    vy -=dy*(len-100)/len*0.001;
    x+=vx;
    y+=vy;
  }
}
void mouseDragged(){
  x=mouseX;y=mouseY;
}

void setup(){
   size(400,300);
}
float x=200,y=150;
void draw(){
  background(#002966);
  fill(255);
  rect(x,y,80,20);
  float dx=x-mouseX, dy=y-mouseY;
  float len=sqrt(dx*dx+dy*dy);
 
  x-=dx*0.1;
  y-=dy*0.1;
}