week ╯ 04 ╮

 week04💜👾

♥將圖片匯入processing(調整適當大小)

♥程式碼-

PImage img;

size(800,533);

img = loadImage("cat.jpg");///匯入一張圖

image( img , 0 , 0);

---

♥再匯入一張圖片作為LOGO

setup只做一次

draw一秒做60次

設滑鼠位置為LOGO的中心

♥程式碼-

PImage img;

PImage img2;

void setup()///only once

{

  size(800,533);

  img = loadImage("cat.jpg");

  img2 = loadImage("logo.png");

}

void draw()///sixty/1sec

{

  image( img , 0 , 0);

  image( img2 ,mouseX-150/2, mouseY-119/2,150,119 );

}

---

♥把background換成長型的圖片

♥程式碼-

PImage img;

PImage img2;

void setup()///only once

{

  size(800,471);

  img = loadImage("bg.jpg");

  img2 = loadImage("mario.png");

}

int x;

void draw()

{

  if(mouseX>200) x--;

  image( img , x , 0);

  image( img2 ,mouseX-110/2, mouseY-100/2,150,119 );

}

---

♥按下滑鼠 和球之間會產生一條線

放開後球將開始彈射

♥程式碼-

float x=250,y=200;

float vx=0,vy=0;

void setup()///only once

{

  size(500,400);

}

void draw()

{

  background(255);

  if(mousePressed)line(mouseX,mouseY,x,y);

  ellipse(x,y,10,10);

  ellipse(mouseX,mouseY,10,10);

  x+=vx; y+=vy;

  if(x>500 || x<0)vx=-vx;

  if(y>400 || y<0)vy=-vy;

}

void mouseReleased()

{

   vx = x-mouseX;

   vy = y-mouseY;

}

---

♥圓圈呈現拋物線

♥程式碼-

float x=250,y=200;

float vx=1.3,vy=-14;

void setup()///only once

{

  size(500,400)-;

}

void draw()

{

  //background(255);隱藏後可看到球的路徑

  ellipse(x,y,10,10);

  x+=vx; y+=vy;///牛頓第一運動定律 動者恆動 靜者恆靜

  vy += 0.98;///牛頓第二運動定律 f=ma

  if(x>500 || x<0)vx=-vx*0.85;

  if(y>400 || y<0)vy=-vy*0.85;

}