李甲駿翹課仔

1.
int ballX=300, ballY=300;
int vx = -2;
void setup(){
  size(700,400);
}
void draw(){
  background(255);
  ellipse(ballX,ballY, 30,30);
  ballX += vx;

  if(ballX<0) vx=+2;彈到牆壁彈回來
  if(ballX>700) vx=-2; 彈到牆壁彈回來
}

2.
float ballX=300, ballY=300;
float vx = +2,vy = -10;
void setup(){
  size(600,400);
}
void draw(){
  background(255);
  ellipse(ballX,ballY, 30,30);
  ballX += vx;
  ballY += vy;
  vy += 0.98;
  if(ballX<0+15) vx= -vx*0.9;
  if(ballX>600-15) vx= -vx*0.9;
  if(ballY<0+15) vy= -vy*0.9;
  if(ballY>400-15) vy= -vy*0.9;
}

3.會停的球
float ballX=300, ballY=300;
float vx = +2,vy = -10;
void setup(){
  size(600,400);
}
void draw(){
  background(255);
  ellipse(ballX,ballY, 30,30);
  ballX += vx;
  ballY += vy;
  if(ballX<0+15) vx= -vx*0.9;
  if(ballX>600-15) vx= -vx*0.9;
  if(ballY<0+15) vy= -vy*0.9;
  if(ballY>400-15){
    vy= -vy*0.9;
    vx= vx*0.9;
    ballY=400-15;
  }
  vy+= 0.98;
}

4.用鍵盤控制mario
PImage imgMario;
float marioX=100,marioY=100;
float marioVX=0,marioVY=0;
void setup(){
  size(500,500);
  imgMario = loadImage("mario.png");
}
void draw(){
  background(255);
  rect(0,200,500,50);
  image(imgMario,marioX,marioY,100,100);
  marioX+=marioVX;
  marioY+=marioVY;
  if(marioY<=100) marioVY += 0.9;
  else marioY = 100;
}
void keyPressed(){
  if(keyCode==RIGHT) marioX+=3;
  if(keyCode==LEFT) marioX-=3;
  if(keyCode==UP){
    marioVY = -15;
  }
}

5.比較好的馬力歐
PImage imgMario;
float marioX=100,marioY=100;
float marioVX=0,marioVY=0;
void setup(){
  size(500,500);
  imgMario = loadImage("mario.png");
}
void draw(){
  background(255);
  rect(0,200,500,50);
  image(imgMario,marioX,marioY,100,100);
  marioX+=marioVX;
  marioY+=marioVY;
  if(softBrake==1) marioVX *=0.9;
  if(marioY<=100) marioVY += 0.9;
  else marioY = 100;
}
int softBrake=0;
void keyReleased(){
  if(keyCode==RIGHT) softBrake=1;
  if(keyCode==LEFT) softBrake=1;
}
void keyPressed(){
  if(keyCode==RIGHT){
    marioVX=3;
    softBrake=0;
  }
  else if(keyCode==LEFT){
    marioVX=-3;
    softBrake=0;
  }
  else if(keyCode==UP){
    marioVY = -15;
}
}