Help in Slit-Scan

Processing Libraries
1

hello :slight_smile:

i have written this code for Slit-Scan,

import processing.video.*;

Capture video;

int x = 0;

void setup() {
 size(2000, 720);
 frameRate(120);


video = new Capture(this, 1280, 720);

// Start capturing the images from the camera
   video.start();  

  background(0);
}

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

void draw() {
 
  int w = video.width;
  int h = video.height;
  copy(video, w/2, 0, 1, h, x, 0, 1, h);

  x = x + 1;
  //panning

  if (x > width) {
    x = 0;
   //panning cycles back to beginning
  }

}

but i need start the capture from the center of screen, it will be like the circle or the clock (rotate it ) like this :

screen
screen.jpg600×600 30.4 KB

1 Like
2

cool sketch! here’s how you can make the circular effect work:

import processing.video.*;

Capture video;

//changed to float
float x = 0;

void setup() {
  size(960, 960);
  frameRate(120);


  video = new Capture(this, 640, 480);

  // Start capturing the images from the camera
  video.start();  

  background(0);
}

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

void draw() {

  int w = video.width;
  int h = video.height;

  x += 1; //you can change this to e.g. 0.5 to make it less choppy
  //panning

  //new center in the middle of the sketch
  translate(width / 2, height / 2);

  //use x to rotate around the new center
  float rotation = map(x, 0, width, 0, TWO_PI);
  rotate(rotation);

  //copy always to the same place, while the canvas is being rotated
  //copied slits are a bit bigger now to avoid black stripes inbetween (and moiree)
  copy(video, w/2, 0, 10, h, 0, -height/2, 10, h);


  if (x > width) {
    x = 0;
    //panning cycles back to beginning
  }
}
2 Likes
3

Mr- retrakt, Thank you very much i appreciate it . :bouquet: