Koiocity

processingdrawings

PImage g;
traceur[] traceurs;

void setup(){
  size(640,640);
  g = loadImage("lehavre.jpg");
 
  traceurs = new traceur[0];
  background(255);
  stroke(0,0,0,15);
  for(int a=0;a<120;a++){
    traceurs = (traceur[]) append (traceurs, new traceur());
  }
 
}

void draw(){
  for(int a=0;a<traceurs.length;a++){
   traceurs[a].dessine(); 
  } 
}

class traceur{
    float x,y,an,v;
    float[] rang={-0.05,0.05};
  traceur(){
    x= random(width);y=random(height);
    an=random(TWO_PI);v=random(1.2,1.5);
   rang[0]=random(-0.1,-0.05);
   rang[1]=random(0.05, 0.1);
  }
  void dessine(){
   an+=random(rang[0],rang[1]);
   float newx=x+cos(an)*v;
   float newy=y+sin(an)*v;
   if(newx<0||newx>width||newy<0||newy>height){
     newx=constrain(newx,0,width);
     newy=constrain(newy,0,height);
     an+=random(-PI,PI);
   rang[0]=random(-0.1,-0.05);
   rang[1]=random(0.05, 0.1);
   }
   if(random(100)<1){ 
   rang[0]=random(-0.1,-0.05);
   rang[1]=random(0.05, 0.1);
   }
   float angleChoisi=an;
  
   float couleur=brightness(g.get(int(newx),int(newy)));
   for(float a=an-PI*0.3;a<an+PI*0.3;a+=PI*0.15){
      int ixe=int(newx+cos(a)*v);
      int igr=int(newy+sin(a)*v);
      float col=brightness(g.get(ixe,igr));
      if(col<couleur){
        couleur=col;
        angleChoisi=a;
      }
   } 
   an=angleChoisi;
   if(random(100)<1){an=an+random(-1,1);}
   line(x,y,newx,newy);
   x=newx;y=newy;
  }
}

void keyReleased(){
  saveFrame("img#####.png");
}

fyprocessing

Wow….what nice code this person is sharing. Thank you. Very instructive.

See, that’s what the app is perfect for.

Carbon Based Lifeforms - Supersede ᴴᴰ