上課內容

PImage imgBird,imgPig;

float birdX=200,birdY=200,oldX,oldY,vx=0,vy=0;

void setup(){

  size(400,400);

  imgBird=loadImage("bird.png");

  imgPig=loadImage("pig.gif");

  imageMode(CENTER);

}

void draw(){

  background(255);

  image(imgBird,birdX,birdY,100,100);

  birdX+=vx; birdY+=vy;

}

void mousePressed(){

  oldX=birdX; oldY=birdY;

}

void mouseDragged(){

  birdX=mouseX; birdY=mouseY;

}

void mouseReleased(){

  vx=(oldX-birdX)/10;

  vy=(oldY-birdY)/10;

}