overte-HifiExperiments/tools/010-templates/fbx.bt

//
//  fbx.bt
//  tools/010-templates
//
//  Created by Ryan Huffman
//  Copyright 2018 High Fidelity, Inc.
//
//  FBX file template
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

local char use64BitAddresses = 1;

struct Header {
    char prefix[23];
    int32 version;
};

struct Property {
    char type;
    if (type == 'Y') {
        int16 value;
    } else if (type == 'C') {
        char value;
    } else if (type == 'I') {
        int32 value;
    } else if (type == 'F') {
        float value;
    } else if (type == 'D') {
        double value;
    } else if (type == 'L') {
        int64 value;
    } else if (type == 'S' || type == 'R') {
        uint32 size;
        char value[size];
    } else {
        uint32 length;
        uint32 encoding;
        uint32 compressedLength;
        if (encoding == 1) {
            char compressedData[compressedLength];
        } else if (type == 'f') {
            float values[this.length];
        } else if (type == 'd') {
            double values[this.length];
        } else if (type == 'l') {
            int64 values[this.length];
        } else if (type == 'i') {
            int32 values[this.length];
        } else if (type == 'b') {
            char values[this.length];
        } else {
            Printf("%c", type);
            Assert(false, "Error, unknown property type");
        }
    }
};

struct Node;

string nodeName(Node& node) {
    if (!exists(node.name)) {
        return "Node ----- ";
    }
    local string s;
    SPrintf(s, "Node (%s) ", node.name);
    return s;
}

struct Node {
    if (use64BitAddresses) {
        int64 endOffset;
        uint64 propertyCount;
        uint64 propertyListLength;
    } else {
        int32 endOffset;
        uint32 propertyCount;
        uint32 propertyListLength;
    }
    uchar nameLength;
    char name[this.nameLength];
    Property properties[this.propertyCount]<optimize=false>;
    while (FTell() < endOffset) {
        Node children<optimize=false, name=nodeName>;
    }
};

struct File {
    Header header;
    use64BitAddresses = header.version >= 7500;
    local int i = 0;
    Node node<name=nodeName>;
    local string name = node.name;
    while (name != "") {
        Node node<name=nodeName>;
        i++;
        name = exists(node[i].name) ? node[i].name : "";
    }

} file;