int promenna;

int pocet=15; //pocet stangli

int[] pozicex = new int[pocet];
int[] pozicey = new int[pocet];

int[] smer = new int[pocet];
int[] delka = new int[pocet];
float[] uhel = new float[pocet];
float[] uhel1 = new float[pocet];
float[] uhel2 = new float[pocet];
float x2;
float y2;

int[] bsmer = new int[pocet];
int[] bdelka = new int[pocet];
float[] buhel = new float[pocet];
float[] buhel1 = new float[pocet];
float[] buhel2 = new float[pocet];
float bx2;
float by2;

float[] rychlostPohybu = new float[pocet];



void setup(){
  frameRate(60);
  smooth();
  size(1280,1024);
  
for(int i=0; i<pocet; i++){
  rychlostPohybu[i]=random(0.0001,0.002);   //rychlost pohybu
  
  pozicex[i]=round(random(1280)); //pozice stangle v plose
  pozicey[i]=round(random(600,900)); //pozice stangle v plose
  
  delka[i]=round(random(100,200)); //delka dolni stangle
  bdelka[i]=round(random(90,150)); //delka horni stangle
  uhel1[i]=random(0,PI/4); //rozsah uhlu na jednu stranu dolni stangle
  uhel2[i]=random(-PI/4,0); //rozsah uhlu na jednu stranu dolni stangle
  buhel1[i]=random(0,PI/4); //rozsah uhlu na jednu stranu horni stangle
  buhel2[i]=random(-PI/4,0); //rozsah uhlu na jednu stranu horni stangle
  
  uhel[i]=random(uhel2[i],uhel1[i]);
  buhel[i]=random(buhel2[i],buhel1[i]);;
  smer[i]=1;
  bsmer[i]=1;
  }
}

void draw(){
  smooth();
  background(255,255,255);
  strokeWeight(5);
  for(promenna=0;promenna<900;promenna+=5){
    stroke(80+promenna/4);
    line(0,promenna,1440, promenna);
  }
  
for(int i=0; i<pocet; i++){
  uhel[i]+= smer[i]*rychlostPohybu[i];
  buhel[i]+= bsmer[i]*rychlostPohybu[i];
  
  if(uhel[i]>uhel1[i]){
    uhel[i]=uhel1[i];
    smer[i]=-1;}
   if(uhel[i]<uhel2[i]){
    uhel[i]=uhel2[i];
    smer[i]=1;}
    
    if(buhel[i]>buhel1[i]){
      buhel[i]=buhel1[i];
      bsmer[i]=-1;}
    if(buhel[i]<buhel2[i]){
      buhel[i]=buhel2[i];
      bsmer[i]=1;}
  
    stroke(217,218,219);
    strokeWeight(47);
    pushMatrix();
    
    translate(pozicex[i],pozicey[i]);
    
    x2=delka[i]*sin(uhel[i]);
    y2=delka[i]*cos(uhel[i]);
    
    bx2=bdelka[i]*sin(buhel[i]);
    by2=bdelka[i]*cos(buhel[i]);
  
    line(0, 0, x2, y2);
    line(0, 0, bx2, -by2);

    stroke(255,255,255);
    strokeWeight(30);

    line(0, 0, x2, y2);
    line(0, 0, bx2, -by2);
    popMatrix();
} 

}