鼠标拖拽折磨布娃娃，JavaScript小游戏代码

发布时间：2018-08-13 22:18:24 所属栏目：编程来源：站长网

导读：一个非常强大的前端代码，作者利用纯JS+CSS编写的小游戏。以下为烈火小编注解：首先用纯CSS实现一个布娃娃人形，这需要有相当棒的CSS功夫，再利用JS脚本将人形实现拖拽，同时加入了反弹、碰撞后的流血等效果，非常不错。言语无法表达效果，请点击下边的

　　一个非常强大的前端代码，作者利用纯JS+CSS编写的小游戏。

　　以下为烈火小编注解：

　　首先用纯CSS实现一个布娃娃人形，这需要有相当棒的CSS功夫，再利用JS脚本将人形实现拖拽，同时加入了反弹、碰撞后的流血等效果，非常不错。言语无法表达效果，请点击下边的运行查看效果吧！

　　演示：

<!DOCTYPE HTML> <html> <head> <title>Rag Doll</title> <meta name="Author" content="hongru.chenhr"> <style type="text/css"> html { overflow: hidden; } body { margin: 0px; padding: 0px; background: #222; position: absolute; width: 100%; height: 100%; } #screen { position: absolute; left: 6%; top: 10%; width: 88%; height: 80%; background: #000; overflow: hidden; cursor: default; } #title { position: absolute; font-family: verdana; width: 100%; font-size: 7em; font-weight: bold; color: #181818; text-align: center; z-index:0; } </style> <script type="text/javascript"> var __SVG = false; var __svgNS = false; if (document.createElementNS) { __svgNS = "http://www.w3.org/2000/svg"; __svg = document.createElementNS(__svgNS, "svg"); __SVG = (__svg.x != null); } if (__SVG) { vectorGraphics = function(o, antialias) { this.canvas = document.createElementNS(__svgNS, "svg"); this.canvas.style.position = "absolute"; o.appendChild(this.canvas); this.createLine = function(w, col, linecap) { var o = document.createElementNS(__svgNS, "line"); o.setAttribute("shape-rendering", antialias?"auto":"optimizeSpeed"); o.setAttribute("stroke-width", Math.round(w)+"px"); if (col) o.setAttribute("stroke", col); if (linecap) o.setAttribute("stroke-linecap", linecap); o.move = function(x1, y1, x2, y2) { this.setAttribute("x1", Math.round(x1) + .5); this.setAttribute("y1", Math.round(y1)); this.setAttribute("x2", Math.round(x2)); this.setAttribute("y2", Math.round(y2)); } o.color = function(c){ this.setAttribute("stroke", c); } o.RGBcolor = function(R, G, B){ this.setAttribute("stroke", "rgb("+Math.round(R)+","+Math.round(G)+","+Math.round(B)+")"); } o.stroke_weight = function(s){ this.setAttribute("stroke-width", Math.round(s)+"px"); } this.canvas.appendChild(o); return o; } this.createPolyline = function(w, points, col, fill) { var o = document.createElementNS(__svgNS, "polyline"); o.setAttribute("shape-rendering", antialias?"auto":"optimizeSpeed"); o.setAttribute("stroke-width", Math.round(w)); if (col) o.setAttribute("stroke", col); o.setAttribute("fill", fill?fill:"none"); if (points) o.setAttribute("points", points); o.move = function(points) { this.setAttribute("points", points); } this.canvas.appendChild(o); return o; } this.createOval = function(diam, filled) { var o = document.createElementNS(__svgNS, "circle"); o.setAttribute("shape-rendering", antialias?"auto":"optimizeSpeed"); o.setAttribute("stroke-width", 0); o.setAttribute("r", Math.round(diam / 2)); o.style.cursor = "pointer"; o.move = function(x1, y1, radius) { this.setAttribute("cx", Math.round(x1)); this.setAttribute("cy", Math.round(y1)); this.setAttribute("r", Math.round(radius)); } o.stroke_color = function(col) { this.setAttribute("stroke", col); } o.fill_color = function(col) { this.setAttribute("fill", col); } o.stroke_weight = function(sw) { this.setAttribute("stroke-width", sw); } this.canvas.appendChild(o); return o; } } } else if (document.createStyleSheet) { vectorGraphics = function(o, antialias) { document.namespaces.add("v", "urn:schemas-microsoft-com:vml"); var style = document.createStyleSheet(); var VMLel = ['line','stroke','polyline','fill','oval']; for (var i=0,l=VMLel.length;i<l;i++) { style.addRule('v:'+VMLel[i], "behavior: url(#default#VML);"); style.addRule('v:'+VMLel[i], "antialias: "+antialias+";"); } this.canvas = o; this.createLine = function(w, col, linecap) { var o = document.createElement("v:line"); o.strokeweight = Math.round(w)+"px"; if (col) o.strokecolor = col; o.move = function(x1, y1, x2, y2) { this.to = (Math.round(x1) + .5) + "," + Math.round(y1); this.from = Math.round(x2) + "," + Math.round(y2); } o.color = function(c){ this.strokecolor = c; } o.RGBcolor = function(R, G, B){ this.strokecolor = "rgb("+Math.round(R)+","+Math.round(G)+","+Math.round(B)+")"; } o.stroke_weight = function(s){ this.strokeweight = Math.round(s)+"px"; } if (linecap) { s = document.createElement("v:stroke"); s.endcap = linecap; o.appendChild(s); } this.canvas.appendChild(o); return o; } this.createPolyline = function(w, points, col, fill) { var o = document.createElement("v:polyline"); o.strokeweight = Math.round(w)+"px"; if (col) o.strokecolor = col; o.points = points; if (fill) o.fillcolor = fill; else { s = document.createElement("v:fill"); s.on = "false"; o.appendChild(s); } o.move = function(points) { this.points.value = points; } this.canvas.appendChild(o); return o; } this.createOval = function(diam, filled) { var o = document.createElement("v:oval"); var os = o.style; os.position = "absolute"; os.cursor = "pointer"; o.strokeweight = 1; o.filled = filled; os.width = Math.round(diam) + "px"; os.height = Math.round(diam) + "px"; o.move = function(x1, y1, radius) { os.left = Math.round(x1 - radius) + "px"; os.top = Math.round(y1 - radius) + "px"; os.width = Math.round(radius * 2) + "px"; os.height = Math.round(radius * 2) + "px"; } o.stroke_color = function(col) { this.strokecolor = col; } o.fill_color = function(col) { this.fillcolor = col; } o.stroke_weight = function(sw) { this.strokeweight = sw; } this.canvas.appendChild(o); return o; } } } else { vectorGraphics = function(o, i) { return false; } } </script> <script type="text/javascript"> /* ==== Vector constructor ==== */ function Vector (x, y) { this.x = x; this.y = y; } Vector.prototype.equ = function (vector, x, y) { this.x = vector.x || x || 0; this.y = vector.y || y || 0; } Vector.prototype.add = function (vector, x, y) { this.x += vector.x || x || 0; this.y += vector.y || y || 0; } var ragdoll = function () { var svg; var scr; var xm = 0; var ym = 0; var nw = 0; var nh = 0; var zoom = 1.5; var dragDoll = false; var xd = 0; var yd = 0; var dolls = []; var nodes = []; var nBlood = 100; var blood = []; var collisions = []; var initScript = function () { for (var i = 0; i < nBlood; i++) blood.push(new Blood()); for (var i = 0; i < dolls.length; i++ ) { for (var j = 0; j < i; j++) { if (i != j) { var o1 = dolls[i]; var o2 = dolls[j]; for (var i1 = 0, n1; n1 = o1.nodes[i1++]; ) { for (var i2 = 0, n2; n2 = o2.nodes[i2++]; ) { if (n1.testCol == 1 && n2.testCol == 1) { collisions.push({ n1p : n1.pos, n1o : n1.oBody.pos, n2p : n2.pos, n2o : n2.oBody.pos, n2s : new Vector(0,0), r : ((n1.size * .5) + (n2.size * .5)) / n1.h2Body, m2 : n1.mass / (n1.mass + n2.mass), m1 : n2.mass / (n1.mass + n2.mass) }); } } } } } } } function addEvent (o, e, f) { if (window.addEventListener) o.addEventListener(e, f, false); else if (window.attachEvent) r = o.attachEvent('on' + e, f); } function resize() { nw = scr.offsetWidth || 0; nh = scr.offsetHeight || 0; } var initEvents = function () { addEvent(document, 'mousemove', function (e) { if (window.event) e = window.event; xm = e.clientX; ym = e.clientY; }); addEvent(document, 'mouseup', function () { if ( dragDoll && document.releaseCapture) dragDoll.dragNode.o.releaseCapture(); scr.style.cursor = "default"; dragDoll = false; return false; }); /* ---- screen resize event ---- */ resize(); addEvent(window, 'resize', resize); } var Blood = function () { this.o = svg.createLine(6 * zoom, "#F00", "round"); this.o.move(-99,-99,-99,-99); this.pos = new Vector(0, 0); this.vel = new Vector(0, 0); this.bloody = false; this.W = 0; } Blood.prototype.start = function (x, y, vx, vy) { this.pos.equ(false, x, y); this.vel.equ(false, vx, vy); this.bloody = true; } Blood.prototype.anim = function () { this.vel.x *= .96; this.vel.y *= .96; this.pos.add(this.vel); if (Math.abs(this.vel.x) + Math.abs(this.vel.y) > 1) { this.o.move( this.pos.x, this.pos.y, this.pos.x + this.vel.x, this.pos.y + this.vel.y ); this.W = parseInt(document.getElementById('red').style.width) + 1; document.getElementById('red').style.width = this.W + 'px'; //if(this.W > = 2000) {document.getElementById('red').style.width = '0px';} } else { this.o.move(-99,-99,-99,-99); this.bloody = false; } } var Doll = function (x, y, structure) { this.nodes = []; /* ==== Node constructor ==== */ this.Node = function (doll, p) { this.parent = doll; this.oBody = p[1]; this.oSpring = p[3]; this.hBody = p[2] * p[2] * zoom * zoom; this.h2Body = p[2] * zoom; this.hSpring = p[4] * p[4] * zoom * zoom; this.size = p[5] * zoom; this.pos = new Vector(x + Math.random(), y); this.old = new Vector(x + Math.random(), y); this.vel = new Vector(0, 0); this.mass = p[6]; this.ind = p[0]; this.bloody = p[8]; this.testCol = p[9]; this.o = svg.createLine(this.size, p[7], "round"); this.s = false; this.o.style.cursor = "pointer"; this.o.parent = this; this.barW = 0; /* ---- drag events ---- */ this.o.onselectstart = function () { return false; } this.o.ondrag = function () { return false; } this.o.onmousedown = function () { dragDoll = this.parent.parent; dragDoll.dragNode = this.parent; xd = dragDoll.dragNode.pos.x - xm; yd = dragDoll.dragNode.pos.y - ym; scr.style.cursor = "pointer"; if (this.setCapture) this.setCapture(); return false; } /* ==== maintain tables ==== */ doll.nodes[this.ind] = this; nodes.push(this); } /* ==== blood splash ==== */ this.Node.prototype.bounce = function (val) { if (this.bloody) if (this.vel.x * this.vel.x + this.vel.y * this.vel.y > zoom) for (var i = 2; i < 2 + Math.random(); i += .25) if (ragdoll.eBlood) blood[Math.floor(Math.random() * nBlood)].start(this.pos.x, this.pos.y, .001 - this.vel.x * zoom * i, .001 - this.vel.y * zoom * i); this.old.equ(this.pos); return val; } /* ==== solving constraints by relaxation ==== */ this.Node.prototype.satisfyConstraints = function (that, len) { var dx = that.pos.x - this.pos.x; var dy = that.pos.y - this.pos.y; var delta = len / (dx * dx + dy * dy + len) - .5; var m1 = (this.mass + that.mass) * ragdoll.flexibility; var m2 = this.mass / m1; m1 = that.mass / m1; this.pos.add(false, -m1 * dx * delta, -m1 * dy * delta); that.pos.add(false, m2 * dx * delta, m2 * dy * delta); } /* ==== Graphic rendering ==== */ this.Node.prototype.rendering = function () { /* ---- body ---- */ if (this.size) this.o.move( this.pos.x, this.pos.y, this.oBody.pos.x, this.oBody.pos.y ); /* ---- springs ---- */ if (this.s) this.s.move( this.pos.x, this.pos.y, this.oSpring.pos.x, this.oSpring.pos.y ); } /* ==== Verlet Integration ==== */ this.Node.prototype.verlet = function () { this.vel.x = (ragdoll.viscosity * (this.pos.x - this.old.x)) || 1; this.vel.y = (ragdoll.viscosity * (this.pos.y - this.old.y) + ragdoll.gravity) || 1; this.old.equ(this.pos); this.pos.add(this.vel); /* --- test borders --- */ if (this.testCol) { var size = this.size * .5; if (this.pos.x < size) this.pos.x = this.bounce(size); else if (this.pos.x > nw - size) this.pos.x = this.bounce(nw - size); if (this.pos.y < size) this.pos.y = this.bounce(size); else if (this.pos.y > nh - size) this.pos.y = this.bounce(nh - size); } /* --- Constraint --- */ if (this != this.oSpring) this.satisfyConstraints(this.oSpring, this.hSpring); if (this != this.oBody) this.satisfyConstraints(this.oBody, this.hBody); } /* ==== create springs display ==== */ this.Node.prototype.dispSpring = function () { if (ragdoll.eSprings) { /* ---- create spring line ---- */ this.s = svg.createLine(1, "#0F0", ""); this.s.onselectstart = function () { return false; } this.s.ondrag = function () { return false; } this.s.o = this; this.s.onmousedown = function () { this.o.o.onmousedown(); return false; } } else { /* ---- clear DOM ---- */ this.s.parentNode.removeChild(this.s); this.s = false; } } /* ==== create Nodes ==== */ for (var i = 0, p; p = structure[i++];) new this.Node(this, p); for (var i = 0, o; o = this.nodes[i++]; ) { o.oBody = this.nodes[o.oBody]; o.oSpring = this.nodes[o.oSpring]; } } var segmentsIntersection = function (p1, p2, p3, p4) { var dn = ((p4.y - p3.y) * (p2.x - p1.x)) - ((p4.x - p3.x) * (p2.y - p1.y)); if (dn) { var na = ((p4.x - p3.x) * (p1.y - p3.y)) - ((p4.y - p3.y) * (p1.x - p3.x)); var nb = ((p2.x - p1.x) * (p1.y - p3.y)) - ((p2.y - p1.y) * (p1.x - p3.x)); var ua = na / dn; var ub = nb / dn; if (ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1) return ua; } return false; } var run = function () { /* --- drag node --- */ if (dragDoll) { dragDoll.dragNode.pos.x += (xm + xd - dragDoll.dragNode.pos.x) * .2; dragDoll.dragNode.pos.y += (ym + yd - dragDoll.dragNode.pos.y) * .2; } /* ---- dolls ---- */ for (var i = 0, o; o = nodes[i++]; ) o.verlet(); for (var i = 0, o; o = nodes[i++]; ) o.rendering(); /* ---- blood ---- */ for (var i = 0, o; o = blood[i++]; ) if (o.bloody) o.anim(); /* ---- collisions btw dolls ---- */ if (ragdoll.collision) { for (var i = 0, o; o = collisions[i++]; ) { o.n2s.x = o.n2p.x - (o.n2o.x - o.n2p.x) * o.r; o.n2s.y = o.n2p.y - (o.n2o.y - o.n2p.y) * o.r; var ua = segmentsIntersection(o.n1p, o.n1o, o.n2s, o.n2o); if (ua != false) { /* ---- bounce ---- */ var ix = ua * (o.n2o.x - o.n2p.x) * ragdoll.collision; var iy = ua * (o.n2o.y - o.n2p.y) * ragdoll.collision; o.n1o.x -= ix * o.m1; o.n2o.x += ix * o.m2; o.n1o.y -= iy * o.m1; o.n2o.y += iy * o.m2; } } } setTimeout(run, 16); } // 源码来自：烈火下载 http://www.veryhuo.com/down return { viscosity : .999, flexibility : 3, gravity : .1, collision : .05, eBlood : true, eSprings : false, dispSprings : function () { this.eSprings = !this.eSprings; for (var i = 0, o; o = nodes[i++]; ) o.dispSpring(); }, /* ==== initialize script ==== */ init : function () { addEvent(window, 'load', function () { /* ---- init SVG/VML canvas ---- */ scr = document.getElementById("screen"); initEvents(); svg = new vectorGraphics(scr, true); zoom = nh / 250; /* ---- syntax ---- */ // dolls.push(new Doll(ragdoll_init_pos_x, ragdoll_init_pos_y, [ // [node_ind,node_parent_ind,node_length,node_spring_parent_ind,spring_length,node_width,node_mass,node_color,blood_on_off,collisions_on_off], // note: declare nodes by z-index order (painting algorithm) - thanks SVG for not implementing zIndex property !!! /* ---- create ragdoll ---- */ dolls.push(new Doll(nw * .5, 40, [ [1,0,3,7,80,10,1, "#888", 0, 0], [5,3,20,1,60,8,1, "#888", 0, 1], [6,4,20,1,60,8,1, "#888", 0, 1], [3,1,20,4,40,10,1, "#FFF", 1, 1], [4,1,20,2,40,10,1, "#FFF", 1, 1], [9,7,30,2,80,8,2, "#888", 0, 1], [10,8,30,2,80,8,2, "#888", 0, 1], [7,2,30,8,30,13,1, "#F80", 1, 1], [8,2,30,1,80,13,1, "#F80", 1, 1], [2,1,30,3,40,20,2, "#FFF", 1, 1], [0,0,35,2,60,35,1, "#888", 1, 1], [11,1,1,2,25,0,1, "#000", 0, 0], [12,11,25,11,25,5,1, "#444", 0, 0] ])); initScript(); run(); }); } } }(); /* ==== start script ==== */ ragdoll.init(); </script> </head> <body> <div id="screen"> <div id="title">花多少时间折磨死他</div> <div id="red" style="position:absolute;height:20px;background:red;width:20px"></div> </div> </body> </html><br /><center>如不能显示效果，请按Ctrl+F5刷新本页，更多网页代码：<a href='http://www.veryhuo.com/' target='_blank'>http://www.veryhuo.com/</a></center>
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