hi

i have a problem with image masking. why is the code down there not always working? in some cases the masking is just not working correct. after drawing a shape on the screen it should display the new captured image in only this area.


import processing.video.*;  

Capture myCapture;
PImage img;
PImage maskImg;

void captureEvent(Capture myCapture) {
 myCapture.read();
}

void setup() {
 size(320, 240);
 colorMode(RGB, 100);
 //println(myCapture.list());
 //String s = "SN9C120+OV7660 WebCam";
 myCapture = new Capture(this, 320, 240, 12);
 background(0);
 stroke(0, 255, 0);
 strokeWeight(50);
}

void draw() {
 if (mousePressed == true) {
   point(mouseX, mouseY);
 }
}


void mouseReleased() {
 maskImg = get();
 int dimension = (width*height);
 for (int i=0; i<dimension; i++) {  
   if(maskImg.pixels[i] == -16711936) {
     maskImg.pixels[i] = -1;
   }
   else {
     maskImg.pixels[i] = -16777216;
   }
 }
 img = myCapture;
 for (int i=0; i<dimension; i++) {  
   img.pixels[i] = myCapture.pixels[i];
 }
 img.mask(maskImg);
 image(img, 0, 0);
}