week04_瑋

10/3號
今天上課的內容
int ballX=300,ballY=300;
int vx=-2;
void setup(){
  size(700,400);
}
void draw(){
  background(255);
  ellipse(ballX,ballY,30,30);
  ///製作圓
  ballX+=vx;
  ballY+=vy;
  ///增加數值
  if(ballX<15)vx=+5;
  if(ballX>685)vx=-5;
  if(ballY<15)vy=+3;
  if(ballY>385)vy=-3;
  上面的是讓球可以再視窗隨機彈跳
}

第二階段

float ballX=300,ballY=300;

float vx=-2,vy=2;

///因為有小數點，所以需要用float

void setup(){

  size(700,400);

}

void draw(){

  ///background(255);

  ellipse(ballX,ballY,30,30);

  ballX+=vx;

  ballY+=vy;

  println(vy);

  vy+=0.98;

  ///重力加速度

  if(ballX<15)vx=-vx*0.9;

  if(ballX>685)vx=-vx*0.9;

  if(ballY<15)vy=-vy*0.9;

  if(ballY>385)vy=-vy*0.9;

  ///彈跳之間

} 

第三階段

///是為了讓地面跟牆有摩擦力

float ballX=300,ballY=300;

float vx=-2,vy=2;

void setup(){

  size(700,400);

}

void draw(){

  ///background(255);

  ellipse(ballX,ballY,30,30);

  ballX+=vx;

  ballY+=vy;

  println(vx);

  

  if(ballX<15)vx=-vx*0.9;

  if(ballX>685)vx=-vx*0.9;

  if(ballY<15)vy=-vy*0.9;

  if(ballY>385){

  vy=-vy*0.9;

  //vx= vx*0.9;

  ballY=400-15;

  }

  vy+=0.98;

}

第四階段

PImage imgkuromi;

float kuromiX=100,kuromiY=100;

float kuromiVX=0,kuromiVY=0;

void setup(){

   size(500,500);

   imgkuromi= loadImage("66.png");

}

void draw(){

 background(#511462);

 rect(0,200,500,50);

 image(imgkuromi,kuromiX,kuromiY,100,100);

 kuromiX+=kuromiVX;

 kuromiY+=kuromiVY;

 if(softBrake==1)kuromiX*=0.9;

 if(kuromiY<=100){

   kuromiVY+=0.9;

 }

 else kuromiY=100;

}

int softBrake=0;

void keyReleased(){

 if(keyCode==RIGHT)softBrake=1;

 if(keyCode==LEFT)softBrake=1;

}

void keyPressed(){

 if(keyCode==RIGHT){

   kuromiVX=+10;

   softBrake=0;

 }

 else if(keyCode==LEFT){

   kuromiVX=-10;

   softBrake=0;

 }

 else if(keyCode==UP) {

   kuromiVY=-15;

   //softBrake=0;

 }

}

有很多未知的錯誤

第五階段