QIDISlicer1.0.0

src/occt_wrapper/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.13)
+project(OCCTWrapper)
+
+if (APPLE)
+    # TODO: we need to fix notarization with the separate shared library
+    add_library(OCCTWrapper STATIC OCCTWrapper.cpp)
+else ()
+    add_library(OCCTWrapper MODULE OCCTWrapper.cpp)
+endif ()
+
+set_target_properties(OCCTWrapper
+    PROPERTIES
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/src"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/src"
+    PREFIX ""
+)
+
+include(GenerateExportHeader)
+
+generate_export_header(OCCTWrapper)
+
+find_package(OpenCASCADE 7.6.2 REQUIRED)
+
+set(OCCT_LIBS
+    TKXDESTEP
+    TKSTEP
+    TKSTEP209
+    TKSTEPAttr
+    TKSTEPBase
+    TKXCAF
+    TKXSBase
+    TKVCAF
+    TKCAF
+    TKLCAF
+    TKCDF
+    TKV3d
+    TKService
+    TKMesh
+    TKBO
+    TKPrim
+    TKHLR
+    TKShHealing
+    TKTopAlgo
+    TKGeomAlgo
+    TKBRep
+    TKGeomBase
+    TKG3d
+    TKG2d
+    TKMath
+    TKernel
+)
+
+slic3r_remap_configs("${OCCT_LIBS}" RelWithDebInfo Release)
+
+target_include_directories(OCCTWrapper PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+target_include_directories(OCCTWrapper PUBLIC ${OpenCASCADE_INCLUDE_DIR})
+target_link_libraries(OCCTWrapper ${OCCT_LIBS})
+
+include(GNUInstallDirs)
+
+install(TARGETS OCCTWrapper DESTINATION "${CMAKE_INSTALL_BINDIR}")
+

src/occt_wrapper/OCCTWrapper.cpp

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+#include "OCCTWrapper.hpp"
+
+#include "occtwrapper_export.h"
+
+#include <cassert>
+
+#ifdef _WIN32
+#define DIR_SEPARATOR '\\'
+#else
+#define DIR_SEPARATOR '/'
+#endif
+
+#include "STEPCAFControl_Reader.hxx"
+#include "BRepMesh_IncrementalMesh.hxx"
+#include "XCAFDoc_DocumentTool.hxx"
+#include "XCAFDoc_ShapeTool.hxx"
+#include "XCAFApp_Application.hxx"
+#include "TopoDS_Builder.hxx"
+#include "TopoDS.hxx"
+#include "TDataStd_Name.hxx"
+#include "BRepBuilderAPI_Transform.hxx"
+#include "TopExp_Explorer.hxx"
+#include "BRep_Tool.hxx"
+
+const double STEP_TRANS_CHORD_ERROR = 0.005;
+const double STEP_TRANS_ANGLE_RES = 1;
+
+// const int LOAD_STEP_STAGE_READ_FILE          = 0;
+// const int LOAD_STEP_STAGE_GET_SOLID          = 1;
+// const int LOAD_STEP_STAGE_GET_MESH           = 2;
+
+namespace Slic3r {
+
+struct NamedSolid {
+    NamedSolid(const TopoDS_Shape& s,
+               const std::string& n) : solid{s}, name{n} {}
+    const TopoDS_Shape solid;
+    const std::string  name;
+};
+
+static void getNamedSolids(const TopLoc_Location& location, const Handle(XCAFDoc_ShapeTool) shapeTool,
+                           const TDF_Label label, std::vector<NamedSolid>& namedSolids)
+{
+    TDF_Label referredLabel{label};
+    if (shapeTool->IsReference(label))
+        shapeTool->GetReferredShape(label, referredLabel);
+
+    std::string name;
+    Handle(TDataStd_Name) shapeName;
+    if (referredLabel.FindAttribute(TDataStd_Name::GetID(), shapeName))
+        name = TCollection_AsciiString(shapeName->Get()).ToCString();
+
+    TopLoc_Location localLocation = location * shapeTool->GetLocation(label);
+    TDF_LabelSequence components;
+    if (shapeTool->GetComponents(referredLabel, components)) {
+        for (Standard_Integer compIndex = 1; compIndex <= components.Length(); ++compIndex) {
+            getNamedSolids(localLocation, shapeTool, components.Value(compIndex), namedSolids);
+        }
+    } else {
+        TopoDS_Shape shape;
+        shapeTool->GetShape(referredLabel, shape);
+        TopAbs_ShapeEnum shape_type = shape.ShapeType();
+        BRepBuilderAPI_Transform transform(shape, localLocation, Standard_True);
+        switch (shape_type) {
+        case TopAbs_COMPOUND:
+            namedSolids.emplace_back(TopoDS::Compound(transform.Shape()), name);
+            break;
+        case TopAbs_COMPSOLID:
+            namedSolids.emplace_back(TopoDS::CompSolid(transform.Shape()), name);
+            break;
+        case TopAbs_SOLID:
+            namedSolids.emplace_back(TopoDS::Solid(transform.Shape()), name);
+            break;
+        default:
+            break;
+        }
+    }
+}
+
+extern "C" OCCTWRAPPER_EXPORT bool load_step_internal(const char *path, OCCTResult* res /*BBS:, ImportStepProgressFn proFn*/)
+{
+try {
+    //bool cb_cancel = false;
+    //if (proFn) {
+    //    proFn(LOAD_STEP_STAGE_READ_FILE, 0, 1, cb_cancel);
+    //    if (cb_cancel)
+    //        return false;
+    //}
+    
+
+    std::vector<NamedSolid> namedSolids;
+    Handle(TDocStd_Document) document;
+    Handle(XCAFApp_Application) application = XCAFApp_Application::GetApplication();
+    application->NewDocument(path, document);
+    STEPCAFControl_Reader reader;
+    reader.SetNameMode(true);
+    //BBS: Todo, read file is slow which cause the progress_bar no update and gui no response
+    IFSelect_ReturnStatus stat = reader.ReadFile(path);
+    if (stat != IFSelect_RetDone || !reader.Transfer(document)) {
+        application->Close(document);
+        res->error_str = std::string{"Could not read '"} + path + "'";
+        return false;
+    }
+    Handle(XCAFDoc_ShapeTool) shapeTool = XCAFDoc_DocumentTool::ShapeTool(document->Main());
+    TDF_LabelSequence topLevelShapes;
+    shapeTool->GetFreeShapes(topLevelShapes);
+
+    Standard_Integer topShapeLength = topLevelShapes.Length() + 1;
+    for (Standard_Integer iLabel = 1; iLabel < topShapeLength; ++iLabel) {
+        //if (proFn) {
+        //    proFn(LOAD_STEP_STAGE_GET_SOLID, iLabel, topShapeLength, cb_cancel);
+        //    if (cb_cancel) {
+        //        shapeTool.reset(nullptr);
+        //        application->Close(document);
+        //        return false;
+        //    }
+        //}
+        getNamedSolids(TopLoc_Location{}, shapeTool, topLevelShapes.Value(iLabel), namedSolids);
+    }
+
+    
+
+    // Now the object name. Set it to filename without suffix.
+    // This will later be changed if only one volume is loaded.
+    const char *last_slash = strrchr(path, DIR_SEPARATOR);
+    std::string obj_name((last_slash == nullptr) ? path : last_slash + 1);
+    res->object_name = obj_name;
+
+    for (size_t i = 0; i < namedSolids.size(); ++i) {
+        //BBS:if (proFn) {
+        //    proFn(LOAD_STEP_STAGE_GET_MESH, i, namedSolids.size(), cb_cancel);
+        //    if (cb_cancel) {
+        //        model->delete_object(new_object);
+        //        shapeTool.reset(nullptr);
+        //        application->Close(document);
+        //        return false;
+        //    }
+        //}
+
+        res->volumes.emplace_back();
+        auto& vertices = res->volumes.back().vertices;
+        auto& indices  = res->volumes.back().indices;
+
+        BRepMesh_IncrementalMesh mesh(namedSolids[i].solid, STEP_TRANS_CHORD_ERROR, false, STEP_TRANS_ANGLE_RES, true);
+
+        for (TopExp_Explorer anExpSF(namedSolids[i].solid, TopAbs_FACE); anExpSF.More(); anExpSF.Next()) {
+            const int aNodeOffset = int(vertices.size());
+            const TopoDS_Shape& aFace = anExpSF.Current();
+            TopLoc_Location aLoc;
+            Handle(Poly_Triangulation) aTriangulation = BRep_Tool::Triangulation(TopoDS::Face(aFace), aLoc);
+            if (aTriangulation.IsNull())
+                continue;
+
+            // First copy vertices (will create duplicates).
+            gp_Trsf aTrsf = aLoc.Transformation();
+            for (Standard_Integer aNodeIter = 1; aNodeIter <= aTriangulation->NbNodes(); ++aNodeIter) {
+                gp_Pnt aPnt = aTriangulation->Node(aNodeIter);
+                aPnt.Transform(aTrsf);
+                vertices.push_back({float(aPnt.X()), float(aPnt.Y()), float(aPnt.Z())});
+            }
+            // Now the indices.
+            const TopAbs_Orientation anOrientation = anExpSF.Current().Orientation();
+            for (Standard_Integer aTriIter = 1; aTriIter <= aTriangulation->NbTriangles(); ++aTriIter) {
+                Poly_Triangle aTri = aTriangulation->Triangle(aTriIter);
+
+                Standard_Integer anId[3];
+                aTri.Get(anId[0], anId[1], anId[2]);
+                if (anOrientation == TopAbs_REVERSED)
+                    std::swap(anId[1], anId[2]);
+
+                // Account for the vertices we already have from previous faces.
+                // anId is 1-based index !
+                indices.push_back({anId[0] - 1 + aNodeOffset,
+                                   anId[1] - 1 + aNodeOffset,
+                                   anId[2] - 1 + aNodeOffset});
+            }
+        }
+
+        res->volumes.back().volume_name = namedSolids[i].name;
+
+        if (vertices.empty())
+            res->volumes.pop_back();        
+    }
+
+    shapeTool.reset(nullptr);
+    application->Close(document);
+
+    if (res->volumes.empty())
+        return false;
+} catch (const std::exception& ex) {
+    res->error_str = ex.what();
+    return false;
+} catch (...) {
+    res->error_str = "An exception was thrown in load_step_internal.";
+    return false;
+}
+    
+    return true;
+}
+
+}; // namespace Slic3r

src/occt_wrapper/OCCTWrapper.hpp

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+
+#ifndef occtwrapper_OCCTWrapper_hpp_
+#define occtwrapper_OCCTWrapper_hpp_
+
+#include <array>
+#include <string>
+#include <vector>
+
+namespace Slic3r {
+
+struct OCCTVolume {
+    std::string volume_name;
+    std::vector<std::array<float, 3>> vertices;
+    std::vector<std::array<int, 3>> indices;
+};
+
+struct OCCTResult {
+    std::string error_str;
+    std::string object_name;
+    std::vector<OCCTVolume> volumes;
+};
+
+using LoadStepFn = bool (*)(const char *path, OCCTResult* occt_result);
+
+}; // namespace Slic3r
+
+#endif // occtwrapper_OCCTWrapper_hpp_