本文知识给大家分享一下使用js写斗地主的思路，代码写的不好，还请见谅。
这里说说斗地主主要包含的功能：洗牌，发牌，玩家出牌、电脑出牌，出牌规则的验证，输赢啥的没有判断，只是实现了这几个主要功能，下面依次说说几个功能的实现：
1.洗牌：
var pukes=this.manage.pukes;//存放扑克牌的数组
//洗牌
for(var i=;i<pukes.length;i++){
var tmp=pukes[i];
var index=util.random(i,pukes.length);//随机交换两张牌
pukes[i]=pukes[index];
pukes[index]=tmp;
}
2.发牌（简版默认是玩家自己为地主，电脑为农民），由于前面洗牌时已经将牌的顺序打乱，所以发牌只是简单的循环把pukes中的元素添加到每个玩家实例中的pukes字段中。
//发牌
var start=;
for(var i=;i<this.manage.pukes.length-;i++) {
if(start==this.manage.players.length){
start=;
}
this.manage.pukes[i].status=true;
this.manage.players[start].pukesLen++;
this.manage.players[start++].pukes.push(this.manage.pukes[i]);
}
for(var i=this.manage.pukes.length-;i<this.manage.pukes.length;i++){
//地主多三张
this.manage.pukes[i].status=true;
this.manage.players[this.manage.curPlayerIndex].pukesLen++;
this.manage.players[this.manage.curPlayerIndex].pukes.push(this.manage.pukes[i]);
}
3.玩家出牌，玩家出牌分为电脑和玩家自己两个步骤，电脑出牌是非常傻瓜的出牌方式（有牌就出）：
//出牌
if(this.options.playerIndex==this.manage.curPlayerIndex) {
var spks = [],gz=false;
if (this.manage.curMaxPlayerIndex == this.options.playerIndex) {
this.manage.deskPukes = [];
}
if (this.isCompute) {
//电脑自动出牌
var start = ;
var len=this.manage.deskPukes.length||;
while (start < this.pukes.length) {
spks = [];
for (var i = ,j=start; i <len&&j<this.pukes.length; i++) {
//随便选一张 可以出就行
if(this.pukes[j].status) {
spks.push(this.pukes[j++]);
}
}
if(spks.length) {
if (rules.valids(spks, this.manage.deskPukes)) {
gz = true;
break;
}
}
start++;
}
}
else {
//玩家选择出牌
for (var i = ; i < this.pukes.length; i++) {
if (this.pukes[i].selected && this.pukes[i].status) {
spks.push(this.pukes[i]);
}
}
if (rules.valids(spks, this.manage.deskPukes)) {
gz=true;
}
else{
alert("出牌不符合规则！");
}
}
if(gz){
this.manage.curMaxPlayerIndex=this.options.playerIndex;
this.manage.deskPukes = [];
for (var i = ; i < spks.length; i++) {
this.pukesLen--;
this.manage.deskPukes.push(spks[i]);
spks[i].status = false;
}
}
this.manage.renderPukes();
this.manage.renderCurDiscard();
if(this.isCompute||gz) {
this.manage.nextPlayer();
}
}
else{
alert("没轮到你出牌！");
}
4.出牌规则的验证，是很多函数组合起来，然后循环调用，如果遇到返回ture的即为出牌符合规则：
//以下为出牌规则
var rules={
_rules:[
new danzRule(),
new duiRule(),
new sandRule(),
new zandRule(),
new shunzRule(),
new liandRule()
],
valids:function(_pukes,_curPukes){
for(var i=;i<this._rules.length;i++){
if(this._rules[i].valid(_pukes,_curPukes)){
return true;
}
}
return false;
}
};
function danzRule(){
//单张规则
}
danzRule.prototype.valid=function(_pukes,_curPukes){
//校验
var pukes=_pukes;//玩家的牌
var curPukes=_curPukes;//左面的牌
if(pukes&&pukes.length==){
//比较牌面值
if(!curPukes||!curPukes.length){
return true;
}
if(curPukes[].dians==&&pukes[].dians<){
//特殊处理
return false;
}
if(pukes[].dians==&&curPukes[].dians<){
//特殊处理
return true;
}
return pukes[].dians>curPukes[].dians;
}
return false;
}
function duiRule(_pukes,_curPukes){
//两张规则
}
duiRule.prototype.valid=function(_pukes,_curPukes){
//校验
var pukes=_pukes;//玩家的牌
var curPukes=_curPukes;//左面的牌
if(pukes&&pukes.length==){
//比较牌面值
if(pukes[].dians>&&pukes[].dians>){
return true;
}
if(pukes[].dians!=pukes[].dians){
return false;
}
if(!curPukes||!curPukes.length){
return true;
}else {
if(curPukes.length!=){
return false;
}
if (curPukes[].dians > && curPukes[].dians > ) {
return false;
}
if (curPukes[].dians != curPukes[].dians) {
return false;
}
if (curPukes[].dians == ) {
return false;
}
}
if(pukes[].dians==){
return true;
}
return pukes[].dians>curPukes[].dians;
}
return false;
}
function sandRule(){
//三带
}
sandRule.prototype.valid=function(_pukes,_curPukes){
//校验
var pukes=_pukes;//玩家的牌
var curPukes=_curPukes;//左面的牌
if(pukes&&(pukes.length>=)){
//比较牌面值
var books=getBooks(pukes);
if(!valid(books))return false;
if(!curPukes||!curPukes.length)return true;
if(curPukes.length!=books.length)return false;
var books=getBooks(curPukes);
if(!valid(books))return false;
return getSum(books)>getSum(books);
}
return false;
function getSum(books){
var sum=;
for(var i=;i<books.length;i++) {
if(books[i]==){
if(i==)return ;
sum+=i;
}
}
return sum;
}
function valid(books){
//验证三带是否有效
var counts= ,countsd= ,d=true,start=false,startIndex=-;
for(var i=;i<books.length;i++) {
if(start&&books[i]==&&startIndex!=(i-)){
return false;
}else{
startIndex=i;
}
if(books[i]==){
if(!start) {
start = true;
startIndex = i;
}
counts++;
}
if(books[i]==){
d=false;
}
}
for(var i=;i<books.length;i++) {
if(d&&books[i]==){
countsd++;
}
else if(!d&&books[i]==){
countsd++;
}
}
return counts>&&counts==countsd;
}
function getBooks(pukes){
//返回三带的每个点数的个数
var books=[];
for(var i=;i<pukes.length;i++){
if(!books[pukes[i].dians]){
books[pukes[i].dians]=;
}else{
books[pukes[i].dians]++;
}
}
return books;
}
}
function zandRule(){
//炸弹
}
zandRule.prototype.valid=function(_pukes,_curPukes){
var pukes=_pukes;//玩家的牌
var curPukes=_curPukes;//左面的牌
if(pukes&&pukes.length==) {
if(!allEqual(pukes)){
return false;
}
if(!curPukes||(curPukes.length>&&curPukes.length!=)||!allEqual(curPukes)){
return true;
}
else{
if(pukes[].dians==){
return true;
}
if(curPukes[].dians==){
return false;
}
return pukes[].dians>curPukes[].dians;
}
}
return false;
function allEqual(pukes){
if(!pukes||!pukes.length)return false;
var base=pukes[].dians;
for(var i=;i<pukes.length;i++){
if(base!=pukes[i].dians){
return false;
}
}
return true;
}
}
function liandRule(){
//连对
}
liandRule.prototype.valid=function(_pukes,_curPukes) {
var pukes=_pukes;//玩家的牌
var curPukes=_curPukes;//左面的牌
if(pukes&&pukes.length>=) {
if(!verificationCoherence(pukes)){
return false;
}
if(!curPukes||curPukes.length<=){
return true;
}
if(!verificationCoherence(curPukes)){
return false;
}
if(pukes.length!=curPukes.length){
return false;
}
return getSumDians(pukes)>getSumDians(curPukes);
}
return false;
function getSumDians(pukes){
var sum=;
for(var i=;i<pukes.length;i++) {
sum+=pukes[i].dians;
}
return sum;
}
function verificationCoherence(pukes){
//验证连贯性
if(!pukes||!pukes.length)return false;
var books=[];
for(var i=;i<pukes.length;i++){
if(pukes[i].dians==||pukes[i].dians>){
return false;
}
if(!books[pukes[i].dians]){
books[pukes[i].dians]=;
}else{
books[pukes[i].dians]++;
}
if(books[pukes[i].dians]>){
return false;
}
}
var start=false;
for(var i=;i<books.length;i++) {
if(books[i]&&books[i]!=){
return false;
}
if(books[i]==&&!start){
start=true;
}
if(start&&books[i]!=){
return false;
}
}
return true;
}
}
function shunzRule(){
//顺子
}
shunzRule.prototype.valid=function(_pukes,_curPukes){
var pukes=_pukes;//玩家的牌
var curPukes=_curPukes;//左面的牌
if(pukes&&pukes.length>=) {
if(!verificationCoherence(pukes)){
return false;
}
if(!curPukes||curPukes.length<=){
return true;
}
if(!verificationCoherence(curPukes)){
return false;
}
if(pukes.length!=curPukes.length){
return false;
}
return getSumDians(pukes)>getSumDians(curPukes);
}
return false;
function getSumDians(pukes){
var sum=;
for(var i=;i<pukes.length;i++) {
sum+=pukes[i].dians;
}
return sum;
}
function verificationCoherence(pukes){
//验证连贯性
if(!pukes||!pukes.length)return false;
var books=[];
for(var i=;i<pukes.length;i++){
if(pukes[i].dians==||pukes[i].dians>){
return false;
}
if(!books[pukes[i].dians]){
books[pukes[i].dians]=;
}else{
return false;
}
}
var start=false;
for(var i=;i<books.length;i++) {
if(books[i]==&&!start){
start=true;
}
if(start&&!books[i]){
return false;
}
}
return true;
}
}
以上4步，是我认为的主要的4个函数，其他的函数，如初始化，事件注册等，在源码已有注释，写的不好勿喷。
JavaScript实现斗地主游戏的思路就给大家介绍这么多，希望对大家有所帮助！