function main(){ gameboard = [["","","",""],["","","",""],["","","",""],["","","",""]]; nums = [2]; max = 2; diff = 5; // difficulty gameover = false; wait_upgrade = false; auto_upgrade = false; gap = Math.pow(2, diff); putNew(); putNew(); nums.push(4); setBoard(); document.getElementById("score"). innerText = "0"; document.getElementById("numlist"). style.color = "black"; showNums(); } function gb(y,x){ if(x===undefined) return gameboard[y]; else return gameboard[y] && gameboard[y][x]; } function n(y,x){ return document.getElementById("n"+y+x); } function putNew(){ var avails = []; for(var p=0; p<4; p++) for(var q=0; q<4; q++) if(gb(p,q)==="") avails.push([p,q]); if(avails.length===0){ return; } var grid = avails[Math.floor(Math.random()*avails.length)]; var rd = Math.random(); var num = 0; for(var p=0, a=4; p=1/a){ num = nums[p]; break; } num = num || nums[0]; gb(grid[0])[grid[1]] = num; } function checkLose(){ if(gameover===true){ gameover=false; main(); return; } for(var p=0; p<4; p++) for(var q=0; q<4; q++) if(gb(p,q)==="" || gb(p,q)===gb(p+1,q) || gb(p,q)===gb(p,q+1)) return false; alert("Gameover"); gameover = true; document.getElementById("cover").style.display = "block"; return true; } function move(dir){ switch(dir){ case "l": case "u": var r = [0,4,1]; break; case "r": case "d": var r = [3,-1,-1]; break; } var moved = false; switch(dir){ case "l": case "r": for(var y=0; y<4;y++){ for(var x=r[0];x!=r[1];x+=r[2]){ if(gb(y,x)===""){ for(var i=x+r[2]; i!=r[1]; i+=r[2]){ if(gb(y,i)!==""){ gb(y)[x] = gb(y,i); gb(y)[i] = ""; x -= r[2]; moved = true; break; }else if(i===r[1]-r[2]){ x = i; } } }else{ for(var i=x+r[2]; i!=r[1]; i+=r[2]){ if(gb(y,i)!==""){ if(gb(y,x)===gb(y,i)){ gb(y)[x] *= 2; gb(y)[i] = ""; addscore(gb(y,x)); if(gb(y,x)>max) max *= 2; moved = true; } break; }else if(i===r[1]-r[2]){ x = i; } } } } } break; case "u": case "d": for(var x=0; x<4; x++){ for(var y=r[0];y!=r[1];y+=r[2]){ if(gb(y,x)===""){ for(var j=y; j!=r[1]; j+=r[2]){ if(gb(j,x)!==""){ gb(y)[x] = gb(j,x); gb(j)[x] = ""; y -= r[2]; moved = true; break; }else if(j===r[1]-r[2]){ y = j; } } }else{ for(var j=y+r[2]; j!=r[1]; j+=r[2]){ if(gb(j,x)!==""){ if(gb(y,x)===gb(j,x)){ gb(y)[x] *= 2; gb(j)[x] = ""; addscore(gb(y,x)); if(gb(y,x)>max) max *= 2; moved = true; } break; }else if(j===r[1]-r[2]){ y = j; } } } } } break; } if(moved===true){ if(wait_upgrade===true || auto_upgrade===true){ wait_upgrade = false; document.getElementById("numlist").style.color = "black"; upgrade(); } putNew(); setBoard(); }else{ checkLose(); } } function setBoard(){ for(var p=0; p<4; p++) for(var q=0; q<4; q++){ var num = simplify(gb(p,q)); n(p,q).innerHTML = num; var v = num.slice(0,-1), u = num.slice(-1); n(p,q).style.color = u===" "?"black": u==="K"?"purple": u==="M"?"blue": u==="G"?"cyan": u==="T"?"green": u==="P"?"yellow": u==="E"?"orange": u==="Z"?"red": "magenta"; n(p,q).style.backgroundColor = v===""?"transparent": v==="1"?"#fd6": v==="2"?"#ec7": v==="4"?"#db8": v==="8"?"#ca9": v==="16"?"#b9a": v==="32"?"#a8b": v==="64"?"#97c": v==="128"?"#86d": v==="256"?"#75e": v==="512"?"#64f": "transparent"; } } function showNums(){ var simps = []; for(var p=0; p=max/gap || (l===4 && gb(p,q)===nums[0])){ wait_upgrade = true; document.getElementById("numlist").style.color = "red"; return; } if(max>nums[l-1]){ if(l===4){ for(var p=0; p<4; p++) nums[p] *= 2; }else{ nums[l] = nums[l-1]*2; } showNums(); } } function addscore(score){ document.getElementById("score").innerText -= -score; } function mstart(e){ pos_start = [e.clientX, e.clientY]; } function mstop(e){ var dx = e.clientX-pos_start[0], dy = e.clientY-pos_start[1]; if(Math.abs(dx)>Math.abs(dy)){ if(Math.abs(dx)>20) move(dx>0?"r":"l"); }else if(Math.abs(dy)>20){ move(dy>0?"d":"u"); } } function keyact(key){ switch(key){ case 37: move("l"); break; case 38: move("u"); break; case 39: move("r"); break; case 40: move("d"); break; case 85: upgrade(); break; } } function simplify(num){ /* num = "" + num; var nnum = num.slice(0,4); var a = 4; while(a=1024 && u<8){ num /= 1024; u += 1; } return num + units[u]; } function toggleAUG(){ auto_upgrade = !auto_upgrade; document.getElementById("upgrade").style.backgroundColor = auto_upgrade?"lime":"#ccc"; } class BigInteger{ static get Bases(){ return "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ#abcdefghijklmnopqrstuvwxyz_"; } static get Bit16(){ return 65536; } static get Bit32(){ return 4294967296; } static get BitLimit(){ return Math.pow(2,54); } static get BitUnit(){ return Math.pow(2,24); } constructor(num){ this._value_list = []; while(num>0){ this._value_list.push (num%BigInteger.BitUnit); num = Math.floor(num/BigInteger.BitUnit); } } get _val(){ return this._value_list; } get _len(){ return this._val.length; } toString(base){ if(base===undefined){ return "not yet"; }else if(base>1&&base<65&&24%Math.log2(base)===0){ var l = this._len, res = ""; var n=this._val[l-1]; while(n>0){ res = BigInteger.Bases [n%base] + res; n = Math.floor(n/base); } for(var i=l-2; i>-1; i--){ var s = "", n=this._val[i]; for(var j=0; j<24/Math.log2(base); j++){ s = BigInteger.Bases [n%base] + s; n = Math.floor(n/base); } res += s; } return res; }else if(base>1&&base<65){ }else{ console.log("Invalid base: " + base); return; } } } //alert(new BigInteger(BigInteger.BitUnit-1).toString(64));

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