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skeleton6.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>skeleton 6</title>
<style>
.range{
display: inline-block;
width: 140px;
}
.range p{
display: inline-block;
width: 100%;
padding: 0;
margin: 0;
text-align: left;
font-family: '微软雅黑';
color: #bbb;
position: relative;
top: -15px;
z-index: -1;
}
</style>
</head>
<body>
<div id="controller">
<div class="range">
<input type="range" id="speedRange" max="0.1" min="0.01" step="0.01" value="0.05">
<p>Speed</p>
</div>
<div class="range">
<input type="range" id="thighRange" max="90" min="0" step="1" value="45">
<p>Thigh</p>
</div>
<div class="range">
<input type="range" id="calfRange" max="90" min="0" step="1" value="45">
<p>Calf</p>
</div>
<div class="range">
<input type="range" id="thighBase" max="180" min="0" step="1" value="90">
<p>ThighBase</p>
</div>
<div class="range">
<input type="range" id="calfOffset" max="180" min="-180" step="1" value="-90">
<p>CalfOffset</p>
</div>
</div>
<canvas id="skeletonCanvas" width="1024" height="600"></canvas>
</body>
<script src="iio-sdk/iioEngine-1.2.2.js"></script>
<script >
/**
* Bone(width,height) 骨骼位置大部分是依附关节,所以提供长宽就可以
* Bone(x,y,width,height)
*/
var Bone = iio.inherit(function(x,y,width,height){
//关节集合
this.joints = {};
//中心旋转角度，为iio处理
this.rotation = 0;
//按fixed关节旋转角度
this.angle = 0;
//注意这不能使用this._super.call(this);因为这时继承关系还没有继承
if(arguments.length == 2){
iio.ioRect.call(this,0,0,x,y);
}else{
iio.ioRect.call(this,x,y,width,height);
}
//iio.ioRect.apply(this, arguments);
},iio.ioRect);
//关节的x,y是相对于骨头的pos(就是骨头的pos)
Bone.prototype.setJoint = function(name,x,y){
if(!this.joints) this.joints = {};
//pos为关节的绝对位置（因运动而不断重设）
this.joints[name] = {x:x,y:y,pos:{x:x,y:y}};
}
Bone.prototype.getJoint = function(name){
return this.joints[name];
}
Bone.prototype.getJointAbsPos = function(name){
if(this.joints[name]){
var targetJoint = this.joints[name],
fixedJoint = this.joints['fixed'];
var disX = targetJoint.x - fixedJoint.x;
var disY = targetJoint.y - fixedJoint.y;
var xPos = this.pos.x+ fixedJoint.x + Math.cos(this.angle)*disX - Math.sin(this.angle)*disY;
var yPos = this.pos.y+ fixedJoint.y + Math.sin(this.angle)*disX + Math.cos(this.angle)*disY;
//同时更新关节的实际位置
targetJoint.pos.x = xPos;
targetJoint.pos.y = yPos;
//dot(xPos,yPos,io.context);
return {x: xPos, y: yPos}
}
}
Bone.prototype.setPosByJoint = function(bone,name){
if(bone instanceof Bone && bone.joints[name]){
var jointAbsPos = bone.getJointAbsPos(name);
var thisFixed = this.joints['fixed'];
var boneFixed = bone.joints['fixed'];
//把自身的固定关节依附到设定关节中
thisFixed.pos.x = jointAbsPos.x;
thisFixed.pos.y = jointAbsPos.y;
//同时更新自身的位置
this.pos.x = jointAbsPos.x - thisFixed.x;
this.pos.y = jointAbsPos.y - thisFixed.y;
}
}
Bone.prototype.drawJoints = function(ctx){
//重新调整自身关节绘画的位置(不影响实际位置)
for(var i in this.joints){
var joint = this.joints[i];
//关节是依附在骨骼上，那么他的位置是相对于骨骼
//它的位置只要计算在骨骼正常位置情况下所在就行了,骨骼旋转或平移会自动相对的了
var posX = this.pos.x + joint.x;
var posY = this.pos.y + joint.y;
this.drawJoint(ctx,posX,posY);
}
}
Bone.prototype.drawJoint = function(ctx,x,y,radius,lineWidth,color){
ctx.lineWidth = lineWidth || 2;
ctx.strokeStyle = color || 'green';
radius = radius || 4;
ctx.beginPath();
ctx.arc(x, y, radius, 0, Math.PI*2, true);
ctx.stroke();
ctx.closePath();
}
Bone.prototype.draw = function(ctx,pos,r){
ctx.save();
var jointPos = this.joints['fixed'].pos; //取出固定关节的实际位置(绝对位置)
ctx.translate(jointPos.x, jointPos.y);
ctx.rotate(this.angle);
ctx.translate(-jointPos.x, -jointPos.y);
//如果带有自己的绘制方法，就不使用默认的矩形
if(typeof this.redraw == 'function'){
this.redraw(ctx);
}else{
this.setStrokeStyle('#000').setFillStyle('#fff'); //默认样式,iio没有设置默认样式，不填是不能显示
this._super.draw.apply(this,arguments);
}
//画出关节
this.drawJoints(ctx);
ctx.restore();
}
var dot = function(x,y,ctx){
ctx.lineWidth = 1;
ctx.beginPath();
ctx.arc(x, y, 2, 0, Math.PI*2, true);
ctx.stroke();
ctx.closePath();
}
var bone0;
var skeletonApp = function(io){
/**
* iio引擎1.2.2和1.2.1有个bug
* 1.2.1版的同个zIndex情况下，先addObj的比后addObj的层次低（后add的高）
* 1.2.2版的同个zIndex情况下，先addObj的比后addObj的层次高（后add的低）
* 并且1.2.2有个bug，默认情况（不填zIndex）会有bug，建议只能填-1或1
* 目前我是直接用1.2.1的源码覆盖1.2.2的部分源码，使行为与1.2.1一致但也有可能还有问题
*/
bone0 = new Bone(400,300,120,30);
bone0.setJoint('fixed',-50,0);
bone0.setJoint('leg',50,0);
//io.addToGroup('bodyBack',bone0,-1);
io.addObj(bone0,-1);
var bone1 = new Bone(120,20);
bone1.setJoint('fixed',-50,0);
bone1.setPosByJoint(bone0,'leg');
//io.addToGroup('bodyBack',bone1,-1);
io.addObj(bone1,-2);
var bone2 = new Bone(400,300,120,30);
bone2.setJoint('fixed',-50,0);
bone2.setJoint('leg',50,0);
bone2.setPosByJoint(bone0,'fixed');
//io.addToGroup('bodyFront',bone2,1);
io.addObj(bone2,1);
var bone3 = new Bone(120,20);
bone3.setJoint('fixed',-50,0);
bone3.setPosByJoint(bone2,'leg');
//io.addToGroup('bodyFront',bone3,1);
io.addObj(bone3,1);
//body
var body = new Bone(60,150);
body.angle = Math.PI/18;
body.setJoint('fixed',0,65);
body.setJoint('head',0,-65);
body.setPosByJoint(bone0,'fixed');
//io.addToGroup('body',body);
io.addObj(body);
//arm
var arm0 = new Bone(110,26);
arm0.setJoint('fixed',-45,0);
arm0.setJoint('arm',45,0);
arm0.setPosByJoint(body,'head');
//io.addToGroup('bodyBack',arm0,-2);
io.addObj(arm0,2);
var arm1 = new Bone(110,20);
arm1.setJoint('fixed',-45,0);
arm1.setPosByJoint(arm0,'arm');
//io.addToGroup('bodyBack',arm1,-2);
io.addObj(arm1,2);
var arm2 = new Bone(110,26);
arm2.setJoint('fixed',-45,0);
arm2.setJoint('arm',45,0);
arm2.setPosByJoint(body,'head');
//io.addToGroup('bodyFront',arm2,1);
io.addObj(arm2,-1);
var arm3 = new Bone(110,20);
arm3.setJoint('fixed',-45,0);
arm3.setPosByJoint(arm2,'arm');
//io.addToGroup('bodyFront',arm3,1);
io.addObj(arm3,-2);
//head
var head = new Bone(50,70);
head.setJoint('fixed',0,0);
head.setPosByJoint(body,'head');
head.redraw = function(ctx){
this.drawJoint(ctx,this.pos.x,this.pos.y-50,30,2,'#555');
};
//io.addToGroup('body',head);
io.addObj(head);
console.log(io);
var els = {};
els.speed = document.getElementById('speedRange');
els.thigh = document.getElementById('thighRange');
els.thighB = document.getElementById('thighBase');
els.calf = document.getElementById('calfRange');
els.calfO = document.getElementById('calfOffset');
var walkLeg = function(boneA,boneB,c){
var deg = Math.PI/180,
thigh = parseFloat(els.thigh.value)*deg,
thighB = parseFloat(els.thighB.value)*deg,
calf = parseFloat(els.calf.value)*deg,
calfO = parseFloat(els.calfO.value)*deg;
var angleA = Math.sin(c)* thigh + thighB;
var angleB = Math.sin(c + calfO) * calf + calf;
boneA.angle = angleA;
boneB.angle = boneA.angle+angleB;
boneB.setPosByJoint(boneA,'leg');
}
var walkArm = function(boneA,boneB,c){
var deg = Math.PI/180,
thigh = parseFloat(els.thigh.value)*deg,
thighB = parseFloat(els.thighB.value)*deg,
calf = parseFloat(els.calf.value)*deg,
calfO = parseFloat(els.calfO.value)*deg;
var angleA = Math.sin(c) * thigh + thighB;
angleB = Math.sin(c - calfO) * calf + calf;
boneA.angle = angleA;
boneB.angle = boneA.angle-angleB;
boneB.setPosByJoint(boneA,'arm');
}
var cycle = 0,ctx;
io.setFramerate(60,function(){
cycle += parseFloat(els.speed.value);
var deg = Math.PI/180;
body.angle = Math.sin(cycle) * 5*deg;
head.angle = Math.sin(cycle) * 10*deg;
/* 下面walk函数里面也有setPosByJoint 要想全身动作整体连贯，最好报所有关键的setPostByJoint都更新一次 */
//bone1.setPosByJoint(bone0,'leg');
bone2.setPosByJoint(bone0,'fixed');
//bone3.setPosByJoint(bone2,'leg');
body.setPosByJoint(bone0,'fixed');
arm0.setPosByJoint(body,'head');
//arm1.setPosByJoint(arm0,'arm');
arm2.setPosByJoint(body,'head');
//arm3.setPosByJoint(arm2,'arm');
head.setPosByJoint(body,'head');
walkLeg(bone0, bone1, cycle);
walkLeg(bone2, bone3, cycle + Math.PI);
walkArm(arm0, arm1,cycle);
walkArm(arm2, arm3, cycle + Math.PI);
//现在我们把我们的骨骼对象都交给ioAppManager，但是我们的Bone对象都没有设定enableKinematics方法
//注意即使设定了enableKinematics方法而没有setVel，ioAppManager都不会把对象不断重绘的。
//所以我们在setFramerrate里面强制告诉ioAppManager，我们需要重绘
io.draw();
});
}
;(function(){
iio.start(skeletonApp,"skeletonCanvas");
})();
</script>
</html>