永夜初晗凝碧天 week08

 step01

播放音樂

```java

import processing.sound.*;

SoundFile sound1,sound2,sound3;

void setup()

{

  size(400,300);

  sound1=new SoundFile(this,"Intro Song_Final.mp3");

  sound1.play();

}

void draw()

{

  

}

```

設舞台

```java

import processing.sound.*;

SoundFile sound1,sound2,sound3;

void setup()

{

  size(400,300);

  textSize(50);

  fill(255,0,0);

  sound1=new SoundFile(this,"Intro Song_Final.mp3");

  sound2=new SoundFile(this,"In Game Music.mp3");

  sound1.play();

}

int stage=1;

void draw()

{

  background(255);

  if(stage==1) text("stage 1",100,100);

  else if(stage==2) text("stage 2",100,100);

}

void mousePressed()

{

  if(stage==1)

  {

    stage=2;

    sound1.stop();

    sound2.play();

  }

  else if(stage==2)

  {

    stage=1;

    sound2.stop();

    sound1.play();

  }

}

```

簡單舞台

```java

void setup()

{

  size(400,300);

}

int stage=1;

void draw()

{

  background(255,0,0);

  textSize(80);

  if(stage==1) text("stage 1",100,100);

  else if(stage==2) text("stage 2",100,100);

}

void mousePressed()

{

  if(stage==1) stage=2;

  else if(stage==2) stage=1;

}

```

step02

會飛的水果

```java

void setup()

{

  size(400,300);

}

float fruitX=200,fruitY=150;

float fruitVX=1,fruitVY=-1;

boolean flying=true;//布林變數

void draw()

{

  background(255,255,0);

  ellipse(fruitX,fruitY,50,50);

  if(flying)

  {

    fruitX+=fruitVX;

    fruitY+=fruitVY;

  }

}

void keyPressed()

{

  flying=false;

}

```

再生水果

```java

void setup()

{

  size(400,300);

}

float fruitX=200,fruitY=300;

float fruitVX=2,fruitVY=-13;

boolean flying=true;//布林變數

void draw()

{

  background(255,255,0);

  ellipse(fruitX,fruitY,50,50);

  if(flying)

  {

    fruitX+=fruitVX;

    fruitY+=fruitVY;

    fruitVY+=0.98/3;//重力加速度

  }

}

void keyPressed()

{

  flying=false;

  fruitReset();//再生一顆水果

}

void fruitReset()

{

  fruitX=random(100,300);

  fruitY=300;//固定高度

  fruitVX=random(-2,+2);

  fruitVY=-13;

  flying=true;

}

```

step03

用class再生水果

```java

class Fruit

{

  float x,y,vx,vy;

  boolean flying;

  PApplet sketch;//讓random可以使用

  Fruit(PApplet _sketch)

  {

    sketch=_sketch;

    reset();

  }

  void reset()

  {

    x=sketch.random(100, 300);

    y=300;

    vx=sketch.random(-2,+2);

    vy=-13;

    flying=true;

  }

  void update()

  {

    x+=vx;

    y+=vy;

    vy+=0.98/3;

  }

}

Fruit fruit;

void setup()

{

  size(400,300);

  fruit=new Fruit(this);

}

void draw()

{

  background(255,255,0);

  ellipse(fruit.x,fruit.y,50,50);

  fruit.update();

}

void keyPressed()

{

  fruit.reset();

}

```