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rockmanL_v0.1.html
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rockmanL_v0.1.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>
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 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
function createB2dAndIO(bodyDef,fixDef,getb2Body){
var obj,body;
body = world.CreateBody(bodyDef);
obj = io.addObj(body).CreateFixture(fixDef)
.GetShape()
.prepGraphics(io.b2Scale);
return getb2Body ? body : obj;
}
var world = io.addB2World(new b2World(
new b2Vec2(0, 20) //gravity
, true //allow sleep
));
var createFixture = function(shape) {
var fixture = new b2FixtureDef();
fixture.density = 3;
fixture.friction = 0.6;
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
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
createB2dAndIO(bodyDef,fixDef).setFillStyle(sysFill).setStrokeStyle(sysStrok);
//bottom outer wall
bodyDef.position.Set(canvas.width/2*bp, (GameHeight+GameOffsetY)*bp-thickness);
createB2dAndIO(bodyDef,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);
createB2dAndIO(bodyDef,fixDef).setFillStyle(sysFill).setStrokeStyle(sysStrok);
//right outer wall
bodyDef.position.Set( (GameWidth+GameOffsetX)*bp -thickness , canvas.height/2*bp);
createB2dAndIO(bodyDef,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)).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();
var player;
var initPlayer = function(){
var fixDef = createFixture(new b2PolygonShape);
fixDef.shape.SetAsBox( 50*bp/2, 100*bp/2);//width,height
var bodyDef = createBody( canvas.width*bp/2, canvas.height*bp/2);//x,y
player = world.CreateBody(bodyDef);
//for style
io.addObj(player).CreateFixture(fixDef).GetShape().prepGraphics(io.b2Scale)
.setFillStyle(Default.fill).setStrokeStyle(Default.stroke);
}; initPlayer();
//Set the update loop
var mouseJoint;
io.setB2Framerate(60, function(){
if(input[UP]){
var body = player;
var md = new b2MouseJointDef();
md.bodyA = world.GetGroundBody();
md.bodyB = body;
md.target.Set(body.GetPosition().x, body.GetPosition().y);
md.collideConnected = true;
md.maxForce = 300.0 * body.GetMass();
//joint类不需要像body类和fixture类麻烦
mouseJoint = io.addObj(world.CreateJoint(md).prepGraphics().setStrokeStyle('white').setLineWidth(1));
body.SetAwake(true);
}
if(mouseJoint) {
if(input[UP]) {
mouseJoint.SetTarget(new b2Vec2(body.GetPosition().x, (body.GetPosition().y-100*bp)));
} else {
world.DestroyJoint(mouseJoint);
io.rmvObj(mouseJoint);
mouseJoint = null;
}
}
console.log(mouseJoint);
});
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>