mirror of
https://github.com/SoftFever/OrcaSlicer.git
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136 lines
4.8 KiB
C++
136 lines
4.8 KiB
C++
#define NOMINMAX
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#include "OpenVDBUtils.hpp"
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#ifdef _MSC_VER
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// Suppress warning C4146 in OpenVDB: unary minus operator applied to unsigned type, result still unsigned
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#pragma warning(push)
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#pragma warning(disable : 4146)
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#endif // _MSC_VER
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#include <openvdb/tools/MeshToVolume.h>
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif // _MSC_VER
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#include <openvdb/tools/VolumeToMesh.h>
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#include <openvdb/tools/Composite.h>
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#include <openvdb/tools/LevelSetRebuild.h>
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//#include "MTUtils.hpp"
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namespace Slic3r {
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class TriangleMeshDataAdapter {
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public:
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const indexed_triangle_set &its;
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float voxel_scale;
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size_t polygonCount() const { return its.indices.size(); }
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size_t pointCount() const { return its.vertices.size(); }
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size_t vertexCount(size_t) const { return 3; }
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// Return position pos in local grid index space for polygon n and vertex v
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// The actual mesh will appear to openvdb as scaled uniformly by voxel_size
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// And the voxel count per unit volume can be affected this way.
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void getIndexSpacePoint(size_t n, size_t v, openvdb::Vec3d& pos) const
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{
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auto vidx = size_t(its.indices[n](Eigen::Index(v)));
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Slic3r::Vec3d p = its.vertices[vidx].cast<double>() * voxel_scale;
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pos = {p.x(), p.y(), p.z()};
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}
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TriangleMeshDataAdapter(const indexed_triangle_set &m, float voxel_sc = 1.f)
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: its{m}, voxel_scale{voxel_sc} {};
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};
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// TODO: Do I need to call initialize? Seems to work without it as well but the
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// docs say it should be called ones. It does a mutex lock-unlock sequence all
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// even if was called previously.
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openvdb::FloatGrid::Ptr mesh_to_grid(const indexed_triangle_set & mesh,
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const openvdb::math::Transform &tr,
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float voxel_scale,
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float exteriorBandWidth,
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float interiorBandWidth,
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int flags)
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{
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openvdb::initialize();
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std::vector<indexed_triangle_set> meshparts = its_split(mesh);
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auto it = std::remove_if(meshparts.begin(), meshparts.end(),
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[](auto &m) { return its_volume(m) < EPSILON; });
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meshparts.erase(it, meshparts.end());
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openvdb::FloatGrid::Ptr grid;
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for (auto &m : meshparts) {
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auto subgrid = openvdb::tools::meshToVolume<openvdb::FloatGrid>(
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TriangleMeshDataAdapter{m, voxel_scale}, tr, exteriorBandWidth,
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interiorBandWidth, flags);
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if (grid && subgrid) openvdb::tools::csgUnion(*grid, *subgrid);
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else if (subgrid) grid = std::move(subgrid);
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}
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if (grid) {
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grid = openvdb::tools::levelSetRebuild(*grid, 0., exteriorBandWidth,
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interiorBandWidth);
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} else if(meshparts.empty()) {
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// Splitting failed, fall back to hollow the original mesh
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grid = openvdb::tools::meshToVolume<openvdb::FloatGrid>(
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TriangleMeshDataAdapter{mesh}, tr, exteriorBandWidth,
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interiorBandWidth, flags);
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}
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grid->insertMeta("voxel_scale", openvdb::FloatMetadata(voxel_scale));
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return grid;
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}
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indexed_triangle_set grid_to_mesh(const openvdb::FloatGrid &grid,
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double isovalue,
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double adaptivity,
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bool relaxDisorientedTriangles)
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{
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openvdb::initialize();
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std::vector<openvdb::Vec3s> points;
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std::vector<openvdb::Vec3I> triangles;
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std::vector<openvdb::Vec4I> quads;
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openvdb::tools::volumeToMesh(grid, points, triangles, quads, isovalue,
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adaptivity, relaxDisorientedTriangles);
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float scale = 1.;
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try {
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scale = grid.template metaValue<float>("voxel_scale");
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} catch (...) { }
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indexed_triangle_set ret;
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ret.vertices.reserve(points.size());
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ret.indices.reserve(triangles.size() + quads.size() * 2);
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for (auto &v : points) ret.vertices.emplace_back(to_vec3f(v) / scale);
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for (auto &v : triangles) ret.indices.emplace_back(to_vec3i(v));
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for (auto &quad : quads) {
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ret.indices.emplace_back(quad(0), quad(1), quad(2));
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ret.indices.emplace_back(quad(2), quad(3), quad(0));
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}
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return ret;
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}
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openvdb::FloatGrid::Ptr redistance_grid(const openvdb::FloatGrid &grid,
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double iso,
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double er,
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double ir)
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{
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auto new_grid = openvdb::tools::levelSetRebuild(grid, float(iso),
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float(er), float(ir));
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// Copies voxel_scale metadata, if it exists.
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new_grid->insertMeta(*grid.deepCopyMeta());
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return new_grid;
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}
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} // namespace Slic3r
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