wendy_week8

 互動技術概論

week8

重點語法:

找畫面像素點

pixels[]

舉例:

找像素是pink的向素點

color pink = color(255, 102, 204);

loadPixels();

for (int i = 0; i < (width*height/2)-width/2; i++) {

  pixels[i] = pink; 

}

updatePixels();

舉例:

點選畫面區塊，顯示點選顏色

PImage img;

color nowColor;

void setup() {

  size(300, 200);

  img=loadImage("cloud.png");

}

void draw() {

  image(img,0,0);

  fill(nowColor);

  rect(0,0,30,30);

}

void mouseMoved(){

  loadPixels();

  int now = width * mouseY + mouseX;

  nowColor = pixels[now];

}