Click and drag mouse up and down to control the signal. Press and hold any key to watch the scanning.
Original Processing.org Example: LinearImage
// All Examples Written by Casey Reas and Ben Fry
// unless otherwise stated.
PImage a;
boolean onetime = true;
int[] aPixels = new int[200*200];
int direction = 1;
float signal;
void setup()
{
size(200, 200);
stroke(255);
a = loadImage("florence03.jpg");
for(int i=0; i<width*height; i++) {
aPixels[i] = a.pixels[i];
}
frameRate(30);
}
void draw()
{
if (signal > width-1 || signal < 0) {
direction = direction * -1;
}
if(mousePressed) {
signal = abs(mouseY%height);
} else {
signal += (0.3*direction);
}
if(keyPressed) {
loadPixels();
for (int i=0; i<width*height; i++) {
pixels[i] = aPixels[i];
}
updatePixels();
line(0, signal, width, signal);
} else {
loadPixels();
for (int i=0; i<width*height; i++) {
pixels[i] = aPixels[int((width*int(signal))+(i%width))];
}
updatePixels();
}
}