processing in 實踐

gistfile1.txt

//show photos
PImage photo_a;
PImage photo_b;
PImage photo_c;
int mode = 0;

void setup() //設定
{
  size(300, 300);
  photo_a = loadImage("a.jpg");
  photo_b = loadImage("b.jpg");
  photo_c = loadImage("c.jpg");
  frameRate(10);
}
//area1 = 0 ~ width/3,
//area2 = width/3 ~ (width/3)*2,
//area3 = (width/3)*2 ~ (width/3)*3

void draw() //繪圖
{ 
  background(0);
  stroke(255);
  line(width/3, 0, width/3, height);
  line(width/3*2, 0, width/3*2, height);

  if (mode == 0) image(photo_a, 30, 10, 30, 30);
  if (mode == 1) image(photo_b, 30, 50, 30, 30);
  if (mode == 2) image(photo_c, 30, 90, 30, 30);
}
void mousePressed() //滑鼠按下
{  
  if (mouseX > 0 && mouseX < width/3)
    mode = 0;

  if (mouseX > width/3  && mouseX <  (width/3)*2)
    mode = 1;

  if ( mouseX >  (width/3)*2 && mouseX <  (width/3)*3)
    mode = 2;
  println("mode:"+mode);
}