if(!e) return; didAnchorLine = e.line; awaitingDidAnchor = true; codeStatus('tap the anchor stone for: '+e.line); } function didAnchorTo(grp){ awaitingDidAnchor = false; cursor.x = grp.position.x; cursor.z = grp.position.z; saveCursor(); paintCursor(); var l = didAnchorLine; didAnchorLine = null; runLine(l); } /* send your build to your friends: `send myfence` turns the save into a code (copied to the bar, ready to copy). a friend types `take

` and the
   build joins their library. no server — the code IS the build. */
function shareEncode(name){
  var sv = SAVES[name];
  if(!sv) return null;
  var b64 = btoa(unescape(encodeURIComponent(JSON.stringify({n:name, s:sv.stones}))));
  return 'RUBY1.' + b64.replace(/\+/g,'-').replace(/\//g,'_').replace(/=+$/,'');
}
function shareDecode(code){
  code = String(code||'').trim();
  if(code.indexOf('RUBY1.')!==0) return null;
  try{
    var b64 = code.slice(6).replace(/-/g,'+').replace(/_/g,'/');
    var p = JSON.parse(decodeURIComponent(escape(atob(b64))));
    if(!p || typeof p.n!=='string' || !/^[a-z][a-z0-9]*$/.test(p.n)) return null;
    if(!Array.isArray(p.s) || !p.s.length || p.s.length>500) return null;
    var known = {cube:1,pyramid:1,sphere:1,cyl:1,torus:1,cone:1,octa:1,tetra:1,icosa:1,dodeca:1,tri:1,pdown:1,poff:1,poffdown:1};
    for(var i=0;i=1&&st.r<=200)) return null;
    }
    return p;
  }catch(e){ return null; }
}
function saveOps(name, ec){
  var sv = SAVES[name].stones, o = [];
  for(var i=0;i 2.01) return false;
  var ay=au.y||0, ah=(au.rubies||1)*(au.k1||1);
  var by=bu.y||0, bh=(bu.rubies||1)*(bu.k1||1);
  return ay <= by+bh+0.01 && by <= ay+ah+0.01;
}
function floodFrom(anchor){
  var seen=[anchor], queue=[anchor];
  while(queue.length){
    var a=queue.pop();
    for(var i=0;i=0) continue;
      if(stoneTouches(a,b)){ seen.push(b); queue.push(b); }
    }
  }
  return seen;
}
function selectConnected(anchor){
  if(!anchor){ codeStatus('no anchor'); return; }
  clearSelection();
  selection = floodFrom(anchor);
  for(var i=0;i` restyles · `cut` removes · `keep` releases');
}
function swapSelection(code){
  if(!selection.length){ codeStatus('nothing selected'); return; }
  var key = codeToShapeKey(code);
  if(!key){ codeStatus('refused · unknown code'); return; }
  var nbase = shapeBase(key), nghost = shapeIsGhost(key);
  var au = selection[0].userData, abase = au.shape, aghost = !!au.ghost, n = 0;
  for(var i=0;i` again · `keep` releases');
}
function cutSelection(){
  if(!selection.length){ codeStatus('nothing selected'); return; }
  var st=[];
  for(var i=0;i10) undoStack.shift();
  saveUndo(); save(); updateAnchors();
  codeStatus(n+' cut');
}
function runOps(ops, mass){
  var raised=0, stepped=0, cleared=0, newGs=[];
  var runProc = null, bi