pbrtools/model/layaAnim.ts

laya pbr tools

import { BufferReader } from './buffer';
import * as fs from 'fs';
import * as path from 'path';


class KeyFramesContent{
    startTime=0;
    duration=0;
    //interpolationData
    data:Float32Array;
    dData:Float32Array;
    nextData:Float32Array;
}

class AnimationNodeContent{
    name:string;
    parentIndex=-1;
    parent:AnimationNodeContent;
    keyframeWidth=0;
    lerpType=0;
    interpolationMethod:Function[];
    childs:AnimationNodeContent[];
    keyFrame:KeyFramesContent[];
    playTime=0;
    extenData:ArrayBuffer;
    dataOffset=0;
}

class AnimationContent{
    nodes:AnimationNodeContent[];
    name:string;
    playTime=0;
    bone3DMap:any;
    totalKeyframesLength =0;
}

class aniLoader{
    buffR:BufferReader;
    aniClsName:string;
    _publicExtData:ArrayBuffer;
    _anis:AnimationContent[];
    _aniMap={};
    static interpolation = [];
    load(src:string){
        var fbuff = fs.readFileSync(src);
        this.buffR =new BufferReader();
        this.buffR.init(fbuff.buffer);
        var reader = this.buffR;
        var version = reader.readString();
        this.aniClsName = reader.readString();
        var strList = reader.readString().split('\n');  //所有骨骼名称
        var aniCount = reader.readU8(); //有多少套动画
        var publicDataPos = reader.readU32();//公用数据POS	
        var publicExtDataPos = reader.readU32();//公用扩展数据POS

        var publicData:ArrayBuffer;
        if(publicDataPos>0)
            publicData = fbuff.buffer.slice(publicDataPos, publicExtDataPos);
        if(publicExtDataPos>0)
            this._publicExtData = fbuff.buffer.slice(publicExtDataPos, fbuff.buffer.byteLength);
        var publicRead = new BufferReader(); publicRead.init(publicData);

        var useParent = !!this.buffR.readU8();  //问题：难道还能不用parent？
        this._anis = [];
        this._anis.length = aniCount;

        for( var i=0; i<aniCount; i++){
            var ani = this._anis[i] = new AnimationContent();
            ani.nodes = [];
            var name = ani.name = strList[this.buffR.readU16()];
            this._aniMap[name]=i;
            ani.bone3DMap = {};
            ani.playTime = this.buffR.readF32();
            var boneCount = ani.nodes.length = this.buffR.readU8(); //本动画的骨骼数目。本动画？
            ani.totalKeyframesLength = 0;
            for( var j=0; j<boneCount; j++){
                var node = ani.nodes[j] = new AnimationNodeContent();
                node.childs = [];
                var nameIndex = this.buffR.readU16();
                if(nameIndex>0){
                    node.name = strList[nameIndex];
                    ani.bone3DMap[node.name] = j;
                }
                node.keyFrame = [];
                node.parentIndex = this.buffR.readU16();    
                node.parentIndex==-1?node.parent=null:ani.nodes[node.parentIndex];
                node.lerpType = this.buffR.readU8();//该节点插值类型:0为不插值，1为逐节点插值，2为私有插值
                var keyframeParamsOffset = this.buffR.readU32();//相对于数据扩展区的偏移地址
                publicRead.readpos = keyframeParamsOffset;//移到数据区
                var keyframeDataCount = node.keyframeWidth = publicRead.readU16();//keyframe数据宽度		
                ani.totalKeyframesLength += keyframeDataCount;
                if(node.lerpType===0 || node.lerpType===1){
                    node.interpolationMethod = new Array(keyframeDataCount);
                    node.interpolationMethod.forEach((v,ii)=>{
                        node.interpolationMethod[ii]=aniLoader.interpolation[publicRead.readU8()];
                    })
                }

                if(node.parent!=null)
                    node.parent.childs.push(node);

                var privateDataLen = this.buffR.readU16();//
                if(privateDataLen>0){
                    node.extenData = this.buffR.buff.slice(this.buffR.readpos,this.buffR.readpos+privateDataLen);//
                    this.buffR.readpos+=privateDataLen;
                }

                var keyframeCount = this.buffR.readU16();
                node.keyFrame.length=keyframeCount;
                var startTime = 0;
                for(var k=0, n=keyframeCount; k<n; k++){
                    var keyFrame = node.keyFrame[k] = new KeyFramesContent();
                    keyFrame.duration = this.buffR.readF32();
                    keyFrame.startTime = startTime;
                    if(node.lerpType===2){
                        throw 'not imp';
                    }
                    keyFrame.data = new Float32Array(keyframeDataCount);
                    keyFrame.dData = new Float32Array(keyframeDataCount);
                    keyFrame.nextData = new Float32Array(keyframeDataCount);
                    for( var l=0; l<keyframeDataCount; l++){
                        keyFrame.data[l] = this.buffR.readF32();
                    }
                    startTime += keyFrame.duration;
                    console.log('starttm='+startTime);
                }
                node.playTime = ani.playTime;//节点总时间可能比总时长大，次处修正
                //_calculateKeyFrame(node, keyframeCount, keyframeDataCount);
            }
        }
    }
}

new aniLoader().load('E:/layaair/layaair/publish/LayaAirPublish/samples/as/3d/bin/h5/threeDimen/models/dude/dude.lsani');