前兩篇,RPG的開發已經實現了添加地圖和添加遊戲人物,本篇來實現地圖的捲軸滾動和人物對話的實現,效果如下
地圖的捲動
#關於地圖的捲動原理,可以參考下圖
#依照上圖說明,實作地圖捲動,只需要先把即將出現的地圖(圖中黃色部分)畫上,然後滾動地圖,待地圖滾動完畢之後,將螢幕之外的部分(圖中綠色部分)移除
#首先要添加一個變數來控制地圖是否滾動
#
//地图滚动 var mapmove = false;
然後,在人物移動的時候,判斷地圖是否需要滾動
/** * 地图是否滚动 **/ Character.prototype.checkMap = function (dir){ var self = this; mapmove = false; //如果不是英雄,则地图不需要滚动 if(!self.isHero)return; switch (dir){ case UP: if(self.y + charaLayer.y> STEP)break; if(mapLayer.y >= 0)break; addMap(0,-1); mapmove = true; break; case LEFT: if(self.x + charaLayer.x > STEP)break; if(mapLayer.x >= 0)break; addMap(-1,0); mapmove = true; break; case RIGHT: if(self.x < 480 - 2*STEP)break; if(480 - mapLayer.x >= map[0].length*STEP)break; addMap(1,0); mapmove = true; break; case DOWN: if(self.y < 288 - 2*STEP)break; if(288 - mapLayer.y >= map.length*STEP)break; addMap(0,1); mapmove = true; break; } };
在移動過程中,判斷地圖是否處於滾動狀態,如果地圖處於滾動,則滾動地圖,否則移動人物
/** * 开始移动 **/ Character.prototype.onmove = function (){ var self = this; //设定一个移动步长中的移动次数 var ml_cnt = 4; //计算一次移动的长度 var ml = STEP/ml_cnt; //根据移动方向,开始移动 switch (self.direction){ case UP: if(mapmove){ mapLayer.y += ml; charaLayer.y += ml; } self.y -= ml; break; case LEFT: if(mapmove){ mapLayer.x += ml; charaLayer.x += ml; } self.x -= ml; break; case RIGHT: if(mapmove){ mapLayer.x -= ml; charaLayer.x -= ml; } self.x += ml; break; case DOWN: if(mapmove){ mapLayer.y -= ml; charaLayer.y -= ml; } self.y += ml; break; } self.moveIndex++; //当移动次数等于设定的次数,开始判断是否继续移动 if(self.moveIndex >= ml_cnt){ //一个地图步长移动完成后,如果地图处于滚动状态,则移除多余地图块 if(mapmove)delMap(); self.moveIndex = 0; //如果已经松开移动键,或者前方为障碍物,则停止移动,否则继续移动 if(!isKeyDown || !self.checkRoad()){ self.move = false; return; }else if(self.direction != self.direction_next){ self.direction = self.direction_next; self.anime.setAction(self.direction); } //地图是否滚动 self.checkMap(self.direction); } };
最後,將地圖的數組和地形擴大為大於螢幕大小
//地图图片数组 var map = [ [18,18,18,18,18,18,18,18,18,18,18,18,55,55,18,18,18], [18,18,18,17,17,17,17,17,17,17,17,17,55,55,17,17,18], [18,18,17,17,17,17,18,18,17,17,17,17,55,55,17,17,18], [18,17,17,17,18,18,18,18,18,17,17,55,55,17,17,17,18], [18,17,17,18,22,23,23,23,24,18,17,55,55,17,17,17,18], [18,17,17,18,25,28,26,79,27,18,55,55,17,17,17,17,18], [18,17,17,17,17,10,11,12,18,18,55,55,17,17,17,17,18], [18,18,17,17,10,16,16,16,11,55,55,17,17,17,17,17,18], [18,18,17,17,77,16,16,16,16,21,21,17,17,17,17,17,18], [18,18,17,17,77,16,16,16,16,55,55,17,17,17,17,17,18], [18,18,18,18,18,18,18,18,18,55,55,18,18,18,18,18,18] ]; //地图地形数组 var mapdata = [ [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1], [1,1,1,0,0,0,0,0,0,0,0,0,1,1,0,0,1], [1,1,0,0,0,0,1,1,0,0,0,0,1,1,0,0,1], [1,0,0,0,1,1,1,1,1,0,0,1,1,0,0,0,1], [1,0,0,1,1,1,1,1,1,1,0,1,1,0,0,0,1], [1,0,0,1,1,1,0,1,1,1,1,1,0,0,0,0,1], [1,0,0,0,0,0,0,0,1,1,1,1,0,0,0,0,1], [1,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,1], [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], [1,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,1], [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1] ];
為了實現地圖滾動,修改添加地圖的方法,根據參數來實現添加上面圖片的黃色地圖部分
//添加地图 function addMap(cx,cy){ var i,j,index,indexX,indexY; var bitmapdata,bitmap; var mapX = mapLayer.x / STEP; var mapY = mapLayer.y / STEP; var mx = cx<0?-1:0,my = cy<0?-1:0; if(imageArray == null){ //地图图片数据 bitmapdata = new LBitmapData(imglist["map"]); //将地图图片拆分,得到拆分后的各个小图片的坐标数组 imageArray = LGlobal.pideCoordinate(bitmapdata.image.width,bitmapdata.image.height,10,10); } mapLayer.removeAllChild(); //在地图层上,画出15*10的小图片 for(i=my;i<9 +Math.abs(cy) && i-mapY < map.length;i++){ for(j=mx;j<15 +Math.abs(cx)&& j-mapX < map[0].length;j++){ //从地图数组中得到相应位置的图片坐标 index = map[i-mapY][j-mapX]; //小图片的竖坐标 indexY = Math.floor(index /10); //小图片的横坐标 indexX = index - indexY*10; //得到小图片 bitmapdata = new LBitmapData(imglist["map"],indexX*32,indexY*32,32,32); bitmap = new LBitmap(bitmapdata); //设置小图片的显示位置 bitmap.x = j*STEP - mapLayer.x; bitmap.y = i*STEP - mapLayer.y; //将小图片显示到地图层 mapLayer.addChild(bitmap); } } } //移除多余地图块 function delMap(){ var bitmap,i; for(i=0;i<mapLayer.childList.length;i++){ bitmap = mapLayer.childList[i]; if(bitmap.x + mapLayer.x < 0 || bitmap.x + mapLayer.x >= 480 || bitmap.y + mapLayer.y < 0 || bitmap.y + mapLayer.y >= 288){ mapLayer.removeChild(bitmap); i--; } } }
看一下效果如下
人物的對話
#對話的實現,點擊控制按鈕的方形按鈕時加,所以,先在滑鼠抬起的時候,判斷是否點擊了方形按鈕
function onup(event){ isKeyDown = false; if(event.offsetX >= ctrlLayer.x + 280 && event.offsetX <= ctrlLayer.x+330){ if(event.offsetY >= ctrlLayer.y+40 && event.offsetY <= ctrlLayer.y+100){ //对话 addTalk(); } } }
在完善addTalk()方法的時候,首先準備好對話的內容
#
var talkScriptList = { "talk1":new Array( {img:"m",name:"鸣人",msg:"我是木叶村的鸣人,你是谁?"}, {img:"n",name:"黑衣忍者甲",msg:"你就是鸣人?九尾还在你身体里吗?"} ), "talk2":new Array( {img:"n",name:"黑衣忍者乙",msg:"鸣人,听说忍者大战就要开始了。"}, {img:"m",name:"鸣人",msg:"真的吗?一定要想想办法啊。"} ) };
talk1,talk2中talk後面的數字,代表人物的編號,其中每個對話單位的img為人物的頭像,name為人物的名稱,msg為對話的內容
添加對話時的做法是,當點擊方形按鈕後,判斷小鳴人前方是否有人,如果有人,則將這個人物的編號取出來,再從上面的數組中獲取相應的對話內容,然後,將相應的內容顯示到遊戲屏幕上,具體實現代碼如下
//对话内容 var talkScript; var talkScriptList = { "talk1":new Array( {img:"m",name:"鸣人",msg:"我是木叶村的鸣人,你是谁?"}, {img:"n",name:"黑衣忍者甲",msg:"你就是鸣人?九尾还在你身体里吗?"} ), "talk2":new Array( {img:"n",name:"黑衣忍者乙",msg:"鸣人,听说忍者大战就要开始了。"}, {img:"m",name:"鸣人",msg:"真的吗?一定要想想办法啊。"} ) }; //对话序号 var talkIndex = 0; //对话中 var talking = false; /** * 添加对话 * */ function addTalk(){ //如果对话内容为空,则开始判断是否可以对话 if(talkScript == null){ var key,tx = player.x,ty = player.y; switch (player.direction){ case UP: ty -= STEP; break; case LEFT: tx -= STEP; break; case RIGHT: tx += STEP; break; case DOWN: ty += STEP; break; } for(key in charaLayer.childList){ //判断前面又没有npc,有则开始对话 if(charaLayer.childList[key].x == tx && charaLayer.childList[key].y == ty){ if(talkScriptList["talk"+charaLayer.childList[key].index]){ talkScript = talkScriptList["talk"+charaLayer.childList[key].index]; talkIndex = 0; } } } //如果前方没有npc,则返回 if(talkScript == null)return; } //将对话层清空 talkLayer.removeAllChild(); //当对话开始,且按照顺序进行对话 if(talkIndex < talkScript.length){ //得到对话内容 var talkObject = talkScript[talkIndex]; //对话背景 bitmapdata = new LBitmapData(imglist["talk"]); bitmap = new LBitmap(bitmapdata); bitmap.width = 330; bitmap.height = 70; bitmap.x = 100; bitmap.y = 20; bitmap.alpha = 0.7; talkLayer.addChild(bitmap); //对话头像 bitmapdata = new LBitmapData(imglist[talkObject.img]); bitmap = new LBitmap(bitmapdata); bitmap.x = 0; bitmap.y = 0; talkLayer.addChild(bitmap); //对话人物名称 var name = new LTextField(); name.x = 110; name.y = 30; name.size = "14"; name.color = "#FFFFFF"; name.text = "[" + talkObject.name + "]"; talkLayer.addChild(name); //对话内容 var msg = new LTextField(); msg.x = 110; msg.y = 55; msg.color = "#FFFFFF"; msg.text = talkObject.msg; talkLayer.addChild(msg); //对话内容逐字显示 msg.wind(); talkLayer.x = 20; talkLayer.y = 50; talkIndex++; }else{ //对话结束 talkScript = null; } }
效果看下圖
遊戲示範網址
http://lufylegend.com/demo/rpg/index.html
##lufylegend.js引擎包內包含這個demo,請直接下載lufylegend.js引擎,查看引擎包內源碼
lufylegend.js引擎下載網址
#http://lufylegend .com/lufylegend
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