Solidify a surface mesh using level set

[ithinu]

Hi, I would like to solidify a surface mesh generated from a 256×256 height map. The triangle sides are approximately 1 unit long and the entire mesh fits within a 256×256×256 cube. However, the output of the code below is either empty or shows only faint contours of the input mesh.

const double voxel  = 1.0;
const double offset = 0.8;

// to level set
float halfWidth = float(std::ceil(offset/voxel) + 1.0f);
auto xform = openvdb::math::Transform::createLinearTransform(voxel);
openvdb::FloatGrid::Ptr sdf =
    openvdb::tools::meshToLevelSet<openvdb::FloatGrid>(
        *xform, inVerts, inTris, halfWidth);

// thicken
openvdb::tools::LevelSetFilter<openvdb::FloatGrid> filt(*sdf);
filt.offset(offset);

// to mesh
std::vector<openvdb::Vec3s> outVerts;
std::vector<openvdb::Vec3I> outTris;
std::vector<openvdb::Vec4I> outQuads;
openvdb::tools::volumeToMesh(*sdf,
                             outVerts, outTris, outQuads,
                             0.0, 0.0, false);

[ithinu]

The problem was that, for open meshes, I should have used openvdb::tools::volumeToMesh instead.