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Code used for A Perfect Circle
import processing.video.*;
import processing.pdf.*;
Capture video;
PGraphics topLayer;
PGraphics topLayer2;
color trackColor;
float hue = 0;
int xorig=width/2, yorig=height/2;
int xprev=width/2, yprev=height/2;
int xprev2=width/2, yprev2=height/2;
void setup() {
size(1280, 720);
smooth();
noStroke();
String[] cameras = Capture.list();
video = new Capture(this, 1280, 720, cameras[0]);
video.start();
trackColor = color(255, 25, 255);
topLayer = createGraphics(width, height, g.getClass().getName());
topLayer2 = createGraphics(width, height, PDF, "output.pdf");
topLayer2.beginDraw();
topLayer2.colorMode(HSB, 360, 100, 100);
}
void draw() {
hue = (hue + 1) % 360;
if (video.available()) {
video.read();
}
image(video, 0, 0);
float worldRecord = 500;
int closestX = 0;
int closestY = 0;
int closestX2 = 0;
int closestY2 = 0;
for (int x = 0; x < video.width; x ++ ) {
for (int y = 0; y < video.height; y ++ ) {
int loc = x + y*video.width;
color currentColor = video.pixels[loc];
float r1 = red(currentColor);
float g1 = green(currentColor);
float b1 = blue(currentColor);
float r2 = red(trackColor);
float g2 = green(trackColor);
float b2 = blue(trackColor);
float d = dist(r1, g1, b1, r2, g2, b2);
if (d < worldRecord) {
worldRecord = d;
closestX = x;
closestY = y;
closestX2 = x;
closestY2 = y;
}
}
}
video.loadPixels();
//topLayer2.stroke(trackColor);
if (worldRecord < 10) {
topLayer2.strokeWeight(3);
topLayer2.stroke(hue, 100, 100);
if (xprev != xorig && yprev != yorig) topLayer2.line(xprev, yprev, closestX, closestY);
xprev = closestX;
yprev = closestY;
}
topLayer.beginDraw();
topLayer.colorMode(HSB, 360, 100, 100);
if (worldRecord < 10) {
topLayer.strokeWeight(3);
topLayer.stroke(hue, 100, 100);
if (xprev2 != xorig && yprev2 != yorig) topLayer.line(xprev2, yprev2, closestX2, closestY2);
xprev2 = closestX2;
yprev2 = closestY2;
}
topLayer.endDraw();
image(topLayer, 0, 0);
}
void mousePressed() {
int loc = mouseX + mouseY*video.width;
trackColor = video.pixels[loc];
//trackColor = hue;
}
void keyPressed() {
if (key == 'q') {
topLayer2.dispose();
topLayer2.endDraw();
}
}
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