triangle_soup_mesh()

MAYAFLUX_API std::optional< Kakshya::MeshData > MayaFlux::Buffers::triangle_soup_mesh

(

std::span< const uint8_t >

vertex_bytes

)

Wrap non-indexed triangle vertices as MeshData.

Parameters

vertex_bytes

Interleaved Kakshya::MeshVertex records; the vertex count must be a nonzero multiple of 3.

Returns

MeshData with a sequential index array (0..N-1) and the canonical mesh layout; nullopt, with an error logged, if MeshInsertion rejects it.

Definition at line 438 of file StagingUtils.cpp.

{
    std::vector<uint32_t> indices(vertex_bytes.size() / sizeof(Kakshya::MeshVertex));
    std::ranges::iota(indices, 0U);
 
    auto mesh_data = Kakshya::MeshData::empty();
    Kakshya::MeshInsertion ins(mesh_data.vertex_variant, mesh_data.index_variant);
    ins.insert_flat(
        vertex_bytes,
        std::span<const uint32_t>(indices),
        Kakshya::VertexLayout::for_meshes(sizeof(Kakshya::MeshVertex)));
    auto access = ins.build();
    if (!access) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "triangle_soup_mesh: MeshInsertion::build() failed");
        return std::nullopt;
    }
    mesh_data.layout = access->layout;
 
    return mesh_data;
}

References MayaFlux::Journal::BufferProcessing, MayaFlux::Journal::Buffers, MayaFlux::Kakshya::MeshInsertion::build(), MayaFlux::Kakshya::MeshData::empty(), MayaFlux::Kakshya::VertexLayout::for_meshes(), indices, MayaFlux::Kakshya::MeshInsertion::insert_flat(), and MF_ERROR.

Referenced by download_compute_mesh(), and MayaFlux::Buffers::DataReadProcessor::resolve_mesh().

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