Ideas for implementing the Landlord Game with JavaScript_javascript skills

The knowledge in this article will share with you the ideas of using js to write Landlords. Please forgive me if the code is not well written.

Here we will talk about the main functions of Doudizhu: shuffling, dealing, players playing cards, computer playing cards, verification of playing rules, there is no judgment about winning or losing, it just implements these main functions, the following are in order Let’s talk about the implementation of several functions:

1. Shuffle:

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. Dealing the cards (The default version of the simplified version is that the player is the landlord and the computer is the farmer). Since the order of the cards has been disrupted during the previous shuffling, dealing the cards is just a simple loop of pukes Elements in are added to the pukes field in each player instance.

//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. The player plays the card . The player plays the card in two steps: the computer and the player themselves. The computer plays the card is a very stupid way of playing the card (play as soon as there is a card):

//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. Verification of the rules of playing cards, is a combination of many functions, and then called in a loop. If true is returned, the playing of cards complies with the rules:

//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;
}
}

The above 4 steps are what I think are the main 4 functions. Other functions, such as initialization, event registration, etc., are already commented in the source code. If they are not well written, please do not comment.

That’s all the ideas for implementing the Landlord game with JavaScript. I hope it will be helpful to you!