ASKEW (java) - OpenProcessing

mySketch
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/* @pjs preload="ASKEW_A.jpg"; */
PImage img;
​
import java.util.List;
final List<PVector> pts = new ArrayList<PVector>();
​
​
void setup() {
  img = loadImage("ASKEW_A.jpg"); 
  size(500, 500, P3D);
  findPoints();
}
​
void draw () {
  background(255);
    
for (int i = pts.size()-1; i >= 0; i --){
      PVector pt = pts.get(i);
      fill(pt.z);
      noStroke();
​
      for (int j = pts.size()-1; j >= 0; j --){
      if(i>1){  
        PVector pt2 = (PVector)pts.get(j);
        if (pt.dist(pt2) < 20){
          
          int r = mouseX/((int)tan(5))/2;
          float x = r * sin(radians(i*(360.0/ (mouseX) )));
          float y = r * sin(radians(i*(360.0/ (mouseY) )));
          
          int r1 =  mouseY/((int)tan(5))/2;
          float x1 = r1 * sin(radians(i*(360.0 / (mouseX))));
          float y1 = r1 * sin(radians(i*(360.0 / (mouseY))));
          
          
          stroke(50);
          line(pt.x + x, pt.y + y, 
          pt2.x + x1, pt2.y + y1);
          
        }
      }
    }
  }
}
​
void findPoints(){
  
  img.loadPixels();
  for (int i = img.width-1; i >= 0; i -= 5){
    for (int j = img.height; j >=0; j -= 5){
​
      color c = img.get(i, j);
      if (brightness(c) < 255){
        pts.add(new PVector(i, j, brightness(c)));
      }
    }
  }
}