时间：2023-07-05 18:33:01 | 来源：网站运营
时间：2023-07-05 18:33:01 来源：网站运营
h5的游戏开发详解：这次给大家带来h5的游戏开发详解，h5游戏开发的注意事项有哪些，下面就是实战案例，一起来看一下。
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//ball 球function Ball(sx, sy, rad, stylestring) { this.sx = sx; this.sy = sy; this.rad = rad; this.draw = drawball; this.moveit = moveball; this.fillstyle = stylestring;}function drawball() { ctx.fillStyle = this.fillstyle; ctx.beginPath(); //ctx.fillStyle= rgb(0,0,0); ctx.arc(this.sx, this.sy, this.rad, 0, Math.PI * 2, true); ctx.fill();}function moveball(dx, dy) { this.sx += dx; this.sy += dy;}//Rect 方形function Myrectangle(sx, sy, swidth, sheight, stylestring) { this.sx = sx; this.sy = sy; this.swidth = swidth; this.sheight = sheight; this.fillstyle = stylestring; this.draw = drawrects; this.moveit = moveball;//move方法是一样的}function drawrects() { ctx.fillStyle = this.fillstyle; ctx.fillRect(this.sx, this.sy, this.swidth, this.sheight);}//多边形function Polycard(sx, sy, rad, n, frontbgcolor, backcolor, polycolor) { this.sx = sx; this.sy = sy; this.rad = rad; this.draw = drawpoly; this.frontbgcolor = frontbgcolor; this.backcolor = backcolor; this.polycolor = polycolor; this.n = n; this.angle = (2 * Math.PI) / n; //parens may not be needed. this.moveit = generalmove;}//画多边形function drawpoly() { ctx.fillStyle = this.frontbgcolor; ctx.strokeStyle = this.backcolor; ctx.fillRect(this.sx - 2 * this.rad, this.sy - 2 * this.rad, 4 * this.rad, 4 * this.rad); ctx.beginPath(); ctx.fillStyle = this.polycolor; var i; var rad = this.rad; ctx.beginPath(); ctx.moveTo(this.sx + rad * Math.cos(-.5 * this.angle), this.sy + rad * Math.sin(-.5 * this.angle)); for (i = 1; i < this.n; i++) { ctx.lineTo(this.sx + rad * Math.cos((i - .5) * this.angle), this.sy + rad * Math.sin((i - .5) * this.angle)); } ctx.fill();}function generalmove(dx, dy) { this.sx += dx; this.sy += dy;}//图像function Picture(sx, sy, swidth, sheight, imga) { this.sx = sx; this.sy = sy; this.img = imga; this.swidth = swidth; this.sheight = sheight; this.draw = drawAnImage;}function drawAnImage() { ctx.drawImage(this.img, this.sx, this.sy, this.swidth, this.sheight);}(ev.layerX || ev.layerX == 0) { mx == (ev.offsetX || ev.offsetX == 0) { mx ==3. 获取按键输入：function getkey(event) { var keyCode; if(event == null) { keyCode = window.event.keyCode; window.event.preventDefault(); } else { keyCode = event.keyCode; event.preventDefault(); } switch(keyCode) { case 68: //按下D deal(); break; case 72: //按下H playerdone(); break; case 78: //按下N newgame(); break; default: alert("Press d, h, or n."); } }4. 添加事件监听：var canvas1 = document.getElementById('canvas'); canvas1.addEventListener('mousedown', startwall, false);//false表示事件冒泡的顺序。 canvas1.addEventListener('mousemove', stretchwall, false); canvas1.addEventListener('mouseup', finish, false);5.运动的图形一般都是统一加载在一个数组中，定时器每触发一次就重绘一次。每一个对象都有draw方法。var mypent = new Token(100, 100, 20, "rgb(0,0,250)", 5);everything.push(mypent); function drawall() { ctx.clearRect(0, 0, cwidth, cheight); var i; for (i = 0; i < everything.length; i++) { everything[i].draw(); }}6.javascript面向对象的能力没有那些高级语言强，很多功能的实现都是巧妙的运用了数组。比如洗牌的动作。 //洗牌就是更换了牌的位置 function shuffle() { var i = deck.length - 1;//deck代表一副牌 var s; while (i>0) {//这里循环一次 每张牌平均更换了两次位置 s = Math.floor(Math.random()*(i+1));//随机范围是0-i (包括i) swapindeck(s,i);//交换位置 i--; } } function swapindeck(j,k) { var hold = new MCard(deck[j].num,deck[j].suit,deck[j].picture.src); //MCard 是一张牌的对象。 deck[j] = deck[k]; deck[k] = hold;}7.很多地方要用到数学知识：比如小球碰撞，就需要改变x和y的运动方向即可。判断是否在击中目标。就是判断xy是否在一定的区间。但判断一个移动的物体能不能经过前面的路，且不能能穿越墙。就有点复杂了。像迷宫那个游戏。本质是要判断线段到球心的距离不小于球的半径。.sx +=.sy += (i = 0; i < walls.length; i++= (intersect(wall.sx, wall.sy, wall.fx, wall.fy, .sx, .sy, .sx -=.sy -== fx -= fy -= 0.0 - ((sx - cx) * dx + (sy - cy) * dy) / ((dx * dx) + (dy * (t < 0.0= 0.0 (t > 1.0= 1.0= (sx+t*(fx-sx))-= (sy +t*(fy-sy))-= (dx*dx) +(dy* (rt<(rad*相信看了本文案例你已经掌握了方法，更多精彩请关注我！！！关键词：游戏
