// Hexatron
// by Rogelio Tomas 

Rotators[] rot;
int radius = 200, imini=0;
float r2 = radius/2.;
int[] lab = new int[24];
int[] lin = new int[4];
PFont f;
float cp3=cos(PI/3), sp3=sin(PI/3);

void setup() 
{
  size(radius*2, radius*2);
  for (int i=0; i <24;i++){
   lab[i]=i;}
 
  rot = new Rotators[7];  
  rot[0]= new Rotators (radius-r2*cp3,radius-r2*sp3, 0,1,2,6,7,8);
  rot[1]= new Rotators (radius+r2*cp3,radius-r2*sp3, 2,3,4,8,9,10);
  rot[2]= new Rotators (radius-r2    ,radius       , 5,6,7,12,13,14);
  rot[3]= new Rotators (radius+r2    ,radius       , 9,10,11,16,17,18);
  rot[4]= new Rotators (radius-r2*cp3,radius+r2*sp3, 13,14,15,19,20,21);
  rot[5]= new Rotators (radius+r2*cp3,radius+r2*sp3, 15,16,17,21,22,23);
  rot[6]= new Rotators (radius       ,radius       , 7,8,9,14,15,16);
  
  f = loadFont("Univers45.vlw.gz");
  textFont(f, radius/7);
  textAlign(CENTER);
}

void hexagon( float rad, float hexx, float hexy){
  beginShape(LINE_STRIP);
  for(int i=0; i<=6; i++) {
   vertex(rad*cos(i*PI/3)+hexx,rad*sin(i*PI/3)+hexy);
  }
  endShape();
}
  
  
void draw() 
{
  background(0);
  fill(0);
  stroke(100);
  hexagon(r2,radius,radius);
  for (int i=1; i<=6; i++){
    hexagon(r2, r2*cos(i*PI/3)+radius,r2*sin(i*PI/3)+radius);
    line(r2*cos(i*PI/3)+radius,r2*sin(i*PI/3)+radius,radius*cos(i*PI/3)+radius,radius*sin(i*PI/3)+radius);
  }
  stroke(255);
  hexagon(radius,radius,radius);
  int  mini=10000000;
  for (int i=0;i<=6;i++){
    if (dist(mouseX,mouseY,rot[i].hx,rot[i].hy)<mini) {
         mini=(int) dist(mouseX,mouseY,rot[i].hx,rot[i].hy);
         imini=i;
    }
  }
  stroke(255,0,0);
  hexagon(r2,rot[imini].hx,rot[imini].hy);
  //if (mousePressed) rot[imini].rotatenow();
  
  float[] linx = new float[4];
  lin[0]=5;
  lin[1]=7;
  lin[2]=7;
  lin[3]=5;
  linx[0]=r2;
  linx[1]=r2/2.;
  linx[2]=r2/2.;
  linx[3]=r2;
  int ind=0;
  fill(255);
  float shift=1;
  for (int j=0;j<4;j++){
    for (int i=0;i<lin[j];i++){
      if (i/2==((float) i / (float)2.0)) shift=1;
      else shift =0;
      if (j>1) shift=-shift+1;
      text(lab[ind]+1, linx[j]+i*r2/2., radius+r2*sp3*(j-1.5)+shift*r2*0.2);
    ind++;
    }
  }
}

void mouseReleased() {
rot[imini].rotatenow();
}

class Rotators {
 int hx, hy, ha, hb, hc, hd, he, hf;
 Rotators(float x, float y,int a, int b, int c, int d, int e, int f){
  hx=(int) x;
  hy=(int) y;
  ha=a;
  hb=b;
  hc=c;
  hd=d;
  he=e;
  hf=f;
  }

void rotatenow(){
int templaba=lab[ha];
lab[ha]=lab[hb];
lab[hb]=lab[hc];
lab[hc]=lab[hf];
lab[hf]=lab[he];
lab[he]=lab[hd];
lab[hd]=templaba;


}

}