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rockmanL_v0.3.html
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<!doctype html>
<html lang="cn">
<head>
<meta charset="UTF-8">
<title>Rockman L</title>
<!-- 注意js的引入顺序，有依赖关系的 -->
<script src="js/Box2dWeb-2.1.a.3.js"></script>
<script src="iio-sdk/iioEngine-1.2.2.js"></script>
<script src="js/bone.js"></script>
</head>
<body></body>
<script>
var player_io = {};
function gameApp(io) {
var b2Vec2 = Box2D.Common.Math.b2Vec2
, b2AABB = Box2D.Collision.b2AABB
, b2BodyDef = Box2D.Dynamics.b2BodyDef
, b2Body = Box2D.Dynamics.b2Body
, b2FixtureDef = Box2D.Dynamics.b2FixtureDef
, b2Fixture = Box2D.Dynamics.b2Fixture
, b2World = Box2D.Dynamics.b2World
, b2PolygonShape = Box2D.Collision.Shapes.b2PolygonShape
, b2CircleShape = Box2D.Collision.Shapes.b2CircleShape
, b2MouseJointDef = Box2D.Dynamics.Joints.b2MouseJointDef;
var ctx = io.context,
canvas = io.canvas;
var GameOffsetX = 50,
GameOffsetY = 10,
GameWidth = canvas.width - GameOffsetX*2,
GameHeight = canvas.height - GameOffsetY*2;
var Default ={
fill:'black',
stroke:'white'
}
var player = {};
var gameObj = {}; //除player之外的所有obj
var PI = Math.PI,
deg = PI/180,//角度换弧度
px = 30, //物理世界度量单位换像素单位 15*px
bp = 1/30; //像素单位换物理世界度量单位 400*bp
//封装了io和box2d create body直接的关系
//由于目前需要获取box2d的body对象，很可能这方法要废弃
function createB2dAndIO(bodyDef,fixDef,getb2Body){
var obj,body;
body = world.CreateBody(bodyDef);
obj = io.addObj(body,-1).CreateFixture(fixDef)
.GetShape()
.prepGraphics(io.b2Scale);
return getb2Body ? body : obj;
}
function renderShape(body,fixDef){
return io.addObj(body,-1).CreateFixture(fixDef)
.GetShape()
.prepGraphics(io.b2Scale);
}
var world = io.addB2World(new b2World(
new b2Vec2(0, 20) //gravity
,true //allow sleep
),-1);
var createFixture = function(shape) {
var fixture = new b2FixtureDef();
fixture.density = 3;
fixture.friction = 0.8;
fixture.restitution = .3;
fixture.shape = shape;
return fixture;
};
var createBody = function(x, y) {
var b = new b2BodyDef();
b.position.Set(x, y);
b.type = b2Body.b2_dynamicBody;
b.linearDamping = .01; //线性阻尼
b.angularDamping = .01; //角阻尼
return b;
};
var initOuterWall = function(){
var thickness = 0.1; //墙壁的厚度的一半
var sysFill = Default.fill;
var sysStrok = Default.stroke;
var fixDef = createFixture(new b2PolygonShape);//不能链式编程
gameObj.outerWall = {};
fixDef.shape.SetAsBox( GameWidth*bp/2, thickness);//width,height
var bodyDef = createBody( canvas.width/2*bp, GameOffsetY*bp + thickness);//x,y
bodyDef.type = b2Body.b2_staticBody;//一般的都是动态物体，只有墙壁是静态物体
//top outer wall
var topWall = world.CreateBody(bodyDef);
gameObj.outerWall.topWall = topWall;
renderShape(topWall,fixDef).setFillStyle(sysFill).setStrokeStyle(sysStrok);
//bottom outer wall
bodyDef.position.Set(canvas.width/2*bp, (GameHeight+GameOffsetY)*bp-thickness);
var bottomWall = world.CreateBody(bodyDef);
gameObj.outerWall.bottomWall = bottomWall;
renderShape(bottomWall,fixDef).setFillStyle(sysFill).setStrokeStyle(sysStrok);
//left outer wall
fixDef.shape.SetAsBox( thickness, GameHeight*bp/2);
bodyDef.position.Set( GameOffsetX*bp+thickness, canvas.height/2*bp);
var leftWall = world.CreateBody(bodyDef);
gameObj.outerWall.leftWall = leftWall;
renderShape(leftWall,fixDef).setFillStyle(sysFill).setStrokeStyle(sysStrok);
//right outer wall
bodyDef.position.Set( (GameWidth+GameOffsetX)*bp -thickness , canvas.height/2*bp);
var rightWall = world.CreateBody(bodyDef);
gameObj.outerWall.rightWall = rightWall;
renderShape(rightWall,fixDef).setFillStyle(sysFill).setStrokeStyle(sysStrok);
}; initOuterWall();
var createSomeObject = function(){
//create some objects
var shape,width,height;
var bodyDef = createBody(0,0);
var fixDef;
for(var i = 0; i < 20; ++i) {
width = Math.random() + 0.2 //half width
height = Math.random() + 0.2 //half height
if(Math.random() > 0.5) {
fixDef = createFixture(new b2PolygonShape);
fixDef.shape.SetAsBox(width, height);
} else {
fixDef = createFixture(new b2CircleShape(width));
}
bodyDef.position.x = Math.random() * 10+10;
bodyDef.position.y = Math.random() * 10+5;
shape=io.addObj(world.CreateBody(bodyDef),-1).CreateFixture(fixDef).GetShape();
if (shape instanceof b2CircleShape)
shape.prepGraphics(io.b2Scale)
.setFillStyle(Default.fill)
.setStrokeStyle(Default.stroke)
.drawReferenceLine();
else
shape.prepGraphics(io.b2Scale)
.setFillStyle(Default.fill)
.setStrokeStyle(Default.stroke);
}
}; createSomeObject();
function Robot(data,x,y,size){
this.pos = {x: x, y: y};
this.bones = {};
this.bonesArray = [];
this.constraint = [];
this.size = size || 1;
this.body = {}; //robot的iio主体
this.b2body; //robot的box2d主体
this.isBackward = false; //表示robot是否向后（屏幕的左方）
this.preX; //水平翻转的所需x
this.preY; //身体晃动运动所需
this.waitingY;
//先暂定这两个玩意先
this.width = 100;
this.height = 200;
/***************** init iio Obj ********************/
var item,bone,jointName,boneName;
for(var i in data){
item = data[i];
boneName = i;
if(item.isMain){
bone = new Bone(x,y,item.size[0]*this.size,item.size[1]*this.size).addImage(item.imgsrc);
this.body = bone;
this.waitingY = y;//初始化waitingY
}else{
bone = new Bone(item.size[0]*this.size,item.size[1]*this.size).addImage(item.imgsrc);
}
if(typeof item.imgOffset != 'undefined')
bone.setImgOffset(item.imgOffset[0]*this.size,item.imgOffset[1]*this.size);
bone.angle = item.angle;
for(var j in item.joint){
jointName = j;
bone.setJoint(jointName,item.joint[jointName][0]*this.size,item.joint[jointName][1]*this.size);
}
if(item.constraint){
item.constraint.unshift(boneName)
this.constraint.push(item.constraint);
}
bone.zIndex = item.zIndex; //新增个人属性
this.bones[boneName] = bone;
//注意最后才addObj。因为iio每次addObj之后都会调用它的draw方法，而如果没有设置joint的话draw方法报错
io.addObj(bone,item.zIndex);
}
//自己画要对zIndex排序了，苦逼啊
var min = {zIndex:0},tempArray = [];
for(var i in this.bones)
tempArray.push(this.bones[i]);
this.bonesArray = tempArray.sort(function(a,b){
var aZIndex = a.zIndex || 0;
var bZIndex = b.zIndex || 0;
return aZIndex - bZIndex;
});
/************* init box2d Obj **************/
var fixDef = createFixture(new b2PolygonShape);
fixDef.shape.SetAsBox( 100*bp/2, 100*bp/2);//width,height
var bodyDef = createBody( canvas.width*bp/2, canvas.height*bp/2);//x,y
this.b2body = world.CreateBody(bodyDef);
this.b2body.CreateFixture(fixDef).GetShape().prepGraphics(io.b2Scale).setStrokeStyle('red');
renderShape(this.b2body,fixDef) //robot不交给iio管理，就不用renderShape
//注意这里新增了一个额外属性
this.b2body.isJumping = false;
var deg = Math.PI/180;
var robotBones = this.bones;
var _this = this.body; //robot的主体代替整个robot
var b2body = this.b2body;
var goSpeed = 6, backSpeed = 4.5;
this.update = function(cycle){
/**
* position change
*/
this.preX = _this.pos.x;
this.preY = _this.pos.y;
var playerPos = b2body.GetPosition();
if(input[UP] && !player.isJumping){
var force = new b2Vec2(0,-20);
b2body.isJumping = true;
b2body.ApplyImpulse(force, b2body.GetPosition());
}
if(input[RIGHT]){
var force = new b2Vec2(10,0);
b2body.ApplyImpulse(force, {x:playerPos.x,y:playerPos.y+0.5});
}
if(input[LEFT]){
var force = new b2Vec2(-10,0);
b2body.ApplyImpulse(force, {x:playerPos.x,y:playerPos.y+0.5});
}
/**
* animation change
*/
if (input[LEFT] && !input[RIGHT])
this.walk(cycle, this.isBackward ? 'go' : 'back');
else if (input[RIGHT] && !input[LEFT])
this.walk(cycle, this.isBackward ? 'back' : 'go');
else this.wait(cycle);
_this.pos.x = b2body.GetPosition().x*px;
_this.pos.y = b2body.GetPosition().y*px - 50;
/*********** 手臂和头跟着鼠标位置而改变 **************/
//如果使用手的关节会发生非常帅的震动动画
var handPos = robotBones.body.getJointAbsPos('head');
var angleD = Math.atan2(mousePos.y-handPos.y,mousePos.x-handPos.x);
//angleD 的正常范围是-1.57~1.57之间（3.14/2= 1.57 ）
if(angleD >1.57 || angleD < -1.57 ){
this.isBackward = true;
this.preX = _this.pos.x; //update
_this.pos.x = canvas.width - _this.width -_this.pos.x;
b2body.SetPosition({x:_this.pos.x*bp,y:b2body.GetPosition().y});
angleD = Math.PI- angleD;
}else{
this.isBackward = false;
}
robotBones.armR.angle = angleD;
robotBones.weapon.angle = angleD;
robotBones.chest.angle = angleD;
robotBones.head.angle = angleD;
robotBones.armL.angle = robotBones.armR.angle-70*deg;
//手臂和手的角度是固定的
robotBones.handR.angle = angleD-90*deg;
robotBones.handL.angle = robotBones.armL.angle;
/************ 集合所有动作都要更新关节之间的位置 ***************/
for(var i = 0; i< this.constraint.length; i++){
var constraint = this.constraint[i];
var childBone = robotBones[constraint[0]];
var parentBone = robotBones[constraint[1]];
childBone.setPosByJoint(parentBone,constraint[2]);
}
//轮循碰撞发生列表来检测汽车是否接触地面
for(var cn = world.GetContactList(); cn != null; cn = cn.GetNext()){
var body1 = cn.GetFixtureA().GetBody();
var body2 = cn.GetFixtureB().GetBody();
if((body1 == player && body2 == gameObj.outerWall.bottomWall) ||
(body2 == player && body1 == gameObj.outerWall.bottomWall)){
b2body.isJumping = false;
}
}
};
this.wait = function(cycle){
this.preY = _this.pos.y;
//要身体下降的距离跟大腿弯身的距离要一致才能保证脚尖水平保持一致
robotBones.body.pos.y = Math.sin(cycle+Math.PI*-.6) * .3+ this.preY;
this.waitingY = _this.pos.y;
var waitLeg = function(boneA,boneB,c,thighB,isRight){
var thigh = 9*deg,
thighB = thighB*deg,
calf = 45*deg,
calfO = -90*deg;
var angleA = Math.sin(c)* thigh + thighB;
var angleB = Math.sin(c + calfO) * calf + calf;
boneA.angle = angleA;
boneB.angle = isRight ? 45*deg: 5*deg;
}
waitLeg(robotBones.legL, robotBones.calfL, cycle,-53,false);
waitLeg(robotBones.legR, robotBones.calfR, cycle ,0,true);
}
this.swing = function(parentBone,childBone,c,settings,isLeg){
var thigh = settings[0]*deg,
thighB = settings[1]*deg,
calf = settings[2]*deg,
calfO = settings[3]*deg;
var angleA = Math.sin(c)* thigh + thighB;
if(isLeg){
var angleB = Math.sin(c + calfO) * calf + calf;
}else{
var angleB = Math.sin(c - calfO) * calf + calf;
}
parentBone.angle = angleA;
childBone.angle = isLeg ? parentBone.angle+angleB : parentBone.angle-angleB;
}
//thigh thighB calf calfO
var settings_go_leg = [65, -20, 45, -105];
var settings_go_arm = [45, 0, 30, 180];
var settings_back_leg = [45, -13, 45, 140];
var settings_back_arm = [20, -11, 27, 180];
this.walk = function(cycle,goOrBack){
//身体晃动运动
this.preY = robotBones.body.pos.y;
robotBones.body.pos.y = Math.sin(cycle*2+Math.PI*3/2) * .8+ this.preY;
if(goOrBack == 'go') cycle+=0.08;
robotBones.body.angle = Math.sin(cycle) * 6*deg;
//head这里在没有武器的时候的动作，有武器的时候动作会被覆盖
robotBones.head.angle = Math.sin(cycle) * 10*deg;
var settings_leg = goOrBack == 'back' ? settings_back_leg : settings_go_leg;
var settings_arm = goOrBack == 'back' ? settings_back_arm : settings_go_arm;
this.swing(robotBones.legL, robotBones.calfL, cycle ,settings_leg,true);
this.swing(robotBones.legR, robotBones.calfR, cycle + Math.PI,settings_leg,true);
//this.swing(robotBones.armL, robotBones.handL,cycle + Math.PI,settings_arm,false);
//this.swing(robotBones.armR, robotBones.handR, cycle,settings_arm,false);
}
}
robot = new Robot(robotData,200,200,0.5);
var cycle=0;
io.setFramerate(60,function(){
//这里没有使用iio的setB2Framerate，因为有bug回事robot转身有问题。使用setFramerate没问题。
//理解内部代码后就可以我们只是简单的在iio更新的代码上，加上box2d物理世界的迭代就可以解决bug
//物理世界的迭代更新
world.Step(1/60, 10, 10);
cycle += 0.08;
robot.update(cycle);
io.draw(); //所有交给iio管理的obj，draw。包括物理世界的对象
/**
* 为什么我不把robot的骨碌都交给iio，因为robot有个水平翻转效果。
* robot的骨骼动画是渲染层，应该跟物理引擎层分开,水平旋转也不会影响物理引擎的渲染
**/
//水平翻转整套效果
if(robot.isBackward){
io.context.save();
io.context.translate(io.canvas.width, 0);
io.context.scale(-1, 1);
}
//遍历所有的骨头draw
for(var i = 0 ; i< robot.bonesArray.length; i++)
robot.bonesArray[i].draw(ctx);
if(robot.isBackward){
io.context.restore();
//注意这里需要恢复context没有旋转的时候的位置
//严格上水平翻转修改的pos.x应该在drawImage层面但是，我这里是整套的骨骼，骨碌上有运动
//简单的翻转不是我想要的效果。
robot.body.pos.x = robot.preX;
robot.b2body.SetPosition({x:robot.preX*bp,y:robot.b2body.GetPosition().y});
}
});
/********* input & contorler **********/
//必须给mousePos给默认值，不然刷新后没有发生mousemove，mousePos为空而报错
var mousePos = {x:io.canvas.width,y:0};
io.canvas.addEventListener('mousemove', function(event){
mousePos = io.getEventPosition(event);
});
var input = [];
var LEFT = 0;
var RIGHT = 1;
var UP = 2;
var DOWN = 3;
var SPACE = 4;
var updateInput = function(event, boolValue){
if(iio.keyCodeIs('left arrow', event) || iio.keyCodeIs('a', event)){
input[LEFT] = boolValue;
}
if(iio.keyCodeIs('right arrow', event) || iio.keyCodeIs('d', event)){
input[RIGHT] = boolValue;
}
if(iio.keyCodeIs('up arrow', event) || iio.keyCodeIs('w', event)){
input[UP] = boolValue;
}
if(iio.keyCodeIs('down arrow', event) || iio.keyCodeIs('s', event)){
input[DOWN] = boolValue;
}
if(iio.keyCodeIs('space',event)){
input[SPACE] = boolValue;
}
}
window.addEventListener('keydown',function(event){
updateInput(event,true);
});
window.addEventListener('keyup',function(event){
updateInput(event,false);
});
io.setBGColor('#555');
}; iio.start(gameApp);
</script>
</html>