06160166 week04

20191003 Week04
製作一個在視窗彈跳的小球
int ballX=300,ballY=300;
int vx = -2;
int vy = -2;
void setup(){
  size(700,400);
}
void draw(){
  background(255);
  ellipse(ballX,ballY,30,30);
  ballX += vx;
  ballY += vy;
  if(ballX<0) vx = +2;
  if(ballX>700) vx =-2;
  if(ballY<0) vy = +2;
  if(ballY>400) vy =-2; 

}

製作一個在地板有拋物線的小球
float ballX=300,ballY=300;
float vx = -2;
float vy = -10;
void setup(){
  size(700,400);
}
void draw(){
  background(255);
  ellipse(ballX,ballY,30,30);
  ballX += vx;
  ballY += vy;
  vy+=0.98;
  if(ballX<0) vx = -vx;
  if(ballX>700) vx =vx;
  if(ballY<0) vy = -vy;
  if(ballY>400) vy =-vy; 

}

符合牛頓定理的彈跳
float ballX=300, ballY=300;
float vx = -2;
float vy = -10;
void setup() {
  size(700, 400);
}
void draw() {
  //background(255);
  ellipse(ballX, ballY, 30, 30);
  ballX += vx;
  ballY += vy;
  if (ballX<0+15) vx = -vx*0.9;
  if (ballX>700-15) 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;

}

彈跳的馬力歐

PImage imgMario;

float mx=50, my=100;

float mvx=0, mvy=0;

void setup() {

  size(1000, 500);

  imgMario = loadImage("Mario.png");

}

void draw() {

  background(0);

  rect(0, 200, 1000, 100);

  image(imgMario, mx, my, 110, 110);

  mx += mvx;

  my += mvy;

  if (my<=100)mvy+=0.9;

  else my =100;

}

void keyPressed() {

  if (keyCode==RIGHT)mx+=3;

  if (keyCode==LEFT)mx-=3;

  if (keyCode==UP) {

    mvy =-15;

  }

}