Method parseProperty

packages/asset-system/src/loaders/FBXLoader.ts:511–587

* Parse a single FBX property * 解析单个 FBX 属性

()

     * 解析单个 FBX 属性
     */
    private parseProperty(): FBXProperty {
        const type = String.fromCharCode(this.view.getUint8(this.offset));
        this.offset += 1;

        switch (type) {
            case 'C': // Bool
                const boolVal = this.view.getUint8(this.offset) !== 0;
                this.offset += 1;
                return boolVal;

            case 'Y': // Int16
                const int16Val = this.view.getInt16(this.offset, true);
                this.offset += 2;
                return int16Val;

            case 'I': // Int32
                const int32Val = this.view.getInt32(this.offset, true);
                this.offset += 4;
                return int32Val;

            case 'L': // Int64
                const int64Val = this.view.getBigInt64(this.offset, true);
                this.offset += 8;
                return int64Val;

            case 'F': // Float
                const floatVal = this.view.getFloat32(this.offset, true);
                this.offset += 4;
                return floatVal;

            case 'D': // Double
                const doubleVal = this.view.getFloat64(this.offset, true);
                this.offset += 8;
                return doubleVal;

            case 'S': // String
            case 'R': // Raw binary
                const strLen = this.view.getUint32(this.offset, true);
                this.offset += 4;
                if (type === 'S') {
                    const strBytes = new Uint8Array(this.buffer, this.offset, strLen);
                    this.offset += strLen;
                    // FBX strings may contain null bytes
                    // FBX 字符串可能包含空字节
                    let str = '';
                    for (let i = 0; i < strLen; i++) {
                        if (strBytes[i] === 0) break;
                        str += String.fromCharCode(strBytes[i]);
                    }
                    return str;
                } else {
                    const rawData = new Uint8Array(this.buffer, this.offset, strLen);
                    this.offset += strLen;
                    return rawData;
                }

            case 'b': // Bool array
            case 'c': // Bool array (alias)