鳥會一直黏在滑鼠上

程式碼

void setup(){

  size(500,400);

  imgBird=loadImage("bird.png");

  imageMode(CENTER);

}

void draw(){

  background(255);

  image(imgBird, mouseX,mouseY,100,100);

}

不再黏在我的滑鼠上了

程式碼

PImage imgBird;

void setup(){

  size(500,400);

  imgBird=loadImage("bird.png");

  imageMode(CENTER);

}

float birdX=100,birdY=300,oldX,oldY;

void draw(){

  background(255);

  image(imgBird, birdX,birdY,100,100);

  if(mousePressed)line(birdX,birdY,oldX,oldY);    

}

void mousePressed(){

  oldX=birdX;oldY=birdY;

}

void mouseDragged(){

  birdX=mouseX;birdY=mouseY;

}