Simple and modern library for parsing the Valve model format.
Documentation: https://taservers.github.io/MDLParser/
See also: https://github.com/Derpius/BSPParser and https://github.com/Derpius/VTFParser.
- Classes for parsing and abstracting the
MDL,VVDandVTXfile formats for the Source engine. - Helper functions to simplify accessing the disparate but related data in all three files (see below).
- Enums, limits and structs with almost 100% coverage* of the formats.
- Runtime errors for issues when parsing the data due to corruption or a bug in the parser.
*Much of the MDL data is not currently parsed or exposed. These can be used to either implement your own more complex
or specialised parser, or to easily extend - and hopefully PR - the MdlParser::Mdl class.
The following minimal example shows how you can easily and safely traverse the interconnected structure of the three files using the accessor helpers:
#include "MDLParser.hpp"
// Load from a file on disk, an API, or somewhere in memory
const auto mdlData = ...;
const auto vtxData = ...;
const auto vvdData = ...;
// Parse the data (you should wrap this in a try/catch)
const MdlParser::Mdl mdl(mdlFileData);
const MdlParser::Vtx vtx(vtxData, mdl.getChecksum());
const MdlParser::Vvd vvd(vvdData, mdl.getChecksum());
// You can construct all three with or without checksums,
// but passing one in will automatically check it against the header before parsing
// const Vtx vtx(vtxData);
// const Vvd vvd(vvdData);
// For each body part (body group) pair...
MdlParser::Accessors::iterateBodyParts(
mdl,
vtx,
[&](const MdlParser::Mdl::BodyPart& mdlBodyPart, const MdlParser::Vtx::BodyPart& vtxBodyPart) {
// For each model pair...
MdlParser::Accessors::iterateModels(
mdlBodyPart,
vtxBodyPart,
[&](const MdlParser::Mdl::Model& mdlModel, const MdlParser::Vtx::Model& vtxModel) {
// Only using the highest LoD here
const MdlParser::Vtx::ModelLod& vtxLod = vtxModel.levelOfDetails[0];
// For each mesh pair...
MdlParser::Accessors::iterateMeshes(
mdlModel,
vtxLod,
[&](const MdlParser::Mdl::Mesh& mdlMesh, const MdlParser::Vtx::Mesh& vtxMesh) {
// For each strip group...
for (const MdlParser::Vtx::StripGroup& stripGroup : vtxMesh.stripGroups) {
// For each vertex...
MdlParser::Accessors::iterateVertices(
vvd,
mdlModel,
mdlMesh,
stripGroup,
[&](
const MdlParser::Structs::Vtx::Vertex&,
const MdlParser::Structs::Vvd::Vertex& vvdVertex,
const MdlParser::Structs::Vector4D& tangent
) {
// ...
}
);
}
}
);
}
);
}
);