02160190_關榮楷,Week02

PImage imgBG;

PImage imgBlack;

void setup(){

  size(800,600);

  imgBG=loadImage("colorBG.jpg");

  imgBlack=createImage(800,600,ARGB);

  

  imgBlack.loadPixels();

  for (int i = 0; i < imgBlack.pixels.length; i++) {

    imgBlack.pixels[i] = color(0,0,0,255);

  }

  imgBlack.updatePixels();

}

void drew() {

  image(imgBG,0,0,width,height);

  image(imgBlack,0,0,width,height);

}

void mouseDragged(){

  imgBlack.loadPixels();

  imgBlack.pixels[mouseX+mouseY*width] = color(0,0,0,0);

  

  imgBlack.updatePixels();

}