HTML5如何实现旋转立体魔方3D模型

二，Rect类

function Rect(pointA,pointB,pointC,pointD,angleX,angleZ,color){  
    base(this,LSprite,[]);  
    this.pointZ=[(pointA[0]+pointB[0]+pointC[0]+pointD[0])/4,(pointA[1]+pointB[1]+pointC[1]+pointD[1])/4,(pointA[2]+pointB[2]+pointC[2]+pointD[2])/4];  
    this.z = this.pointZ[2];  
    this.pointA=pointA,this.pointB=pointB,this.pointC=pointC,this.pointD=pointD,this.angleX=angleX,this.angleZ=angleZ,this.color=color;  
}  
Rect.prototype.draw = function(layer){  
    this.graphics.clear();  
    this.graphics.drawVertices(1,"#000000",[this.getPoint(this.pointA),this.getPoint(this.pointB),this.getPoint(this.pointC),this.getPoint(this.pointD)],true,this.color);  
};  
Rect.prototype.setAngle = function(a,b){  
    this.angleX = a;  
    this.angleZ = b;  
    this.z=this.getPoint(this.pointZ)[2];  
};  
Rect.prototype.getPoint = function(p){  
    var u2,v2,w2,u=p[0],v=p[1],w=p[2];  
    u2 = u * Math.cos(this.angleX) - v * Math.sin(this.angleX);  
    v2 = u * Math.sin(this.angleX) + v * Math.cos(this.angleX);  
    w2 = w;  
    u = u2; v = v2; w = w2;  
    u2 = u;  
    v2 = v * Math.cos(this.angleZ) - w * Math.sin(this.angleZ);  
    w2 = v * Math.sin(this.angleZ) + w * Math.cos(this.angleZ);  
    u = u2; v = v2; w = w2;  
    return [u2,v2,w2];  
};

三，Main.js

init(50,"mylegend",400,400,main);  
var a = 0,b=0,backLayer,step = 20,key = null;  
function main(){  
    backLayer = new LSprite();  
    addChild(backLayer);  
    backLayer.x = 120,backLayer.y = 120;  
    //后  
    for(var x=0;x<3;x++){  
        for(var y=0;y<3;y++){  
            z = 0;  
            var rect = new Rect([-3*step + x*2*step,-3*step + y*2*step,-3*step + z*2*step],[-step + x*2*step,-3*step + y*2*step,-3*step + z*2*step],[-step + x*2*step,-step + y*2*step,-3*step + z*2*step],[-3*step + x*2*step,-step + y*2*step,-3*step + z*2*step],0,0,"#FF4500");  
            backLayer.addChild(rect);  
        }  
    }  
    //前  
    for(var x=0;x<3;x++){  
        for(var y=0;y<3;y++){  
            z = 3;  
            var rect = new Rect([-3*step + x*2*step,-3*step + y*2*step,-3*step + z*2*step],[-step + x*2*step,-3*step + y*2*step,-3*step + z*2*step],[-step + x*2*step,-step + y*2*step,-3*step + z*2*step],[-3*step + x*2*step,-step + y*2*step,-3*step + z*2*step],0,0,"#FF0000");  
            backLayer.addChild(rect);  
        }  
    }  
    //上  
    for(var x=0;x<3;x++){  
        for(var z=0;z<3;z++){  
            y = 0;  
            var rect = new Rect([-3*step + x*2*step,-3*step + y*2*step,-3*step + z*2*step],[-step + x*2*step,-3*step + y*2*step,-3*step + z*2*step],[-step + x*2*step,-3*step + y*2*step,-step + z*2*step],[-3*step + x*2*step,-3*step + y*2*step,-step + z*2*step],0,0,"#FFFFFF");  
            backLayer.addChild(rect);  
        }  
    }  
    //下  
    for(var x=0;x<3;x++){  
        for(var z=0;z<3;z++){  
            y = 3;  
            var rect = new Rect([-3*step + x*2*step,-3*step + y*2*step,-3*step + z*2*step],[-step + x*2*step,-3*step + y*2*step,-3*step + z*2*step],[-step + x*2*step,-3*step + y*2*step,-step + z*2*step],[-3*step + x*2*step,-3*step + y*2*step,-step + z*2*step],0,0,"#FFFF00");  
            backLayer.addChild(rect);  
        }  
    }  
    //左  
    for(var y=0;y<3;y++){  
        for(var z=0;z<3;z++){  
            x = 0;  
            var rect = new Rect([-3*step + x*2*step,-3*step + y*2*step,-3*step + z*2*step],[-3*step + x*2*step,-3*step + y*2*step,-step + z*2*step],[-3*step + x*2*step,-step + y*2*step,-step + z*2*step],[-3*step + x*2*step,-step + y*2*step,-3*step + z*2*step],0,0,"#008000");  
            backLayer.addChild(rect);  
        }  
    }  
    //右  
    for(var y=0;y<3;y++){  
        for(var z=0;z<3;z++){  
            x = 3;  
            var rect = new Rect([-3*step + x*2*step,-3*step + y*2*step,-3*step + z*2*step],[-3*step + x*2*step,-3*step + y*2*step,-step + z*2*step],[-3*step + x*2*step,-step + y*2*step,-step + z*2*step],[-3*step + x*2*step,-step + y*2*step,-3*step + z*2*step],0,0,"#0000FF");  
            backLayer.addChild(rect);  
        }  
    }  
    backLayer.addEventListener(LEvent.ENTER_FRAME,onframe);  
}  
function onframe(){  
    a += 0.1 , b += 0.1;  
    backLayer.childList = backLayer.childList.sort(function(a,b){return a.z - b.z;});  
    for(key in backLayer.childList){  
        backLayer.childList[key].setAngle(a,b);  
        backLayer.childList[key].draw(backLayer);  
   }  
}

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