Prepare the stitching line feature

application/application.pro

@@ -283,6 +283,8 @@ HEADERS += ../dust3d/mesh/resolve_triangle_tangent.h
 SOURCES += ../dust3d/mesh/resolve_triangle_tangent.cc
 HEADERS += ../dust3d/mesh/smooth_normal.h
 SOURCES += ../dust3d/mesh/smooth_normal.cc
+HEADERS += ../dust3d/mesh/stitch_mesh_builder.h
+SOURCES += ../dust3d/mesh/stitch_mesh_builder.cc
 HEADERS += ../dust3d/mesh/stroke_mesh_builder.h
 SOURCES += ../dust3d/mesh/stroke_mesh_builder.cc
 HEADERS += ../dust3d/mesh/stroke_modifier.h

application/sources/material_previews_generator.cc

@@ -48,7 +48,7 @@ void MaterialPreviewsGenerator::generate()
     
     std::vector<dust3d::Uuid> partIds;
     dust3d::Ds3FileReader ds3Reader((const std::uint8_t *)fileData.data(), fileData.size());
-    for (int i = 0; i < ds3Reader.items().size(); ++i) {
+    for (int i = 0; i < (int)ds3Reader.items().size(); ++i) {
         dust3d::Ds3ReaderItem item = ds3Reader.items().at(i);
         if (item.type == "model") {
             std::vector<std::uint8_t> data;

dust3d/base/part_target.h

@@ -32,6 +32,7 @@ enum class PartTarget
 {
     Model = 0,
     CutFace,
+    StitchingLine,
     Count
 };
 PartTarget PartTargetFromString(const char *targetString);
@@ -43,6 +44,8 @@ PartTarget PartTargetFromString(const char *targetString)
         return PartTarget::Model;                                               \
     if (target == "CutFace")                                                    \
         return PartTarget::CutFace;                                             \
+    if (target == "StitchingLine")                                              \
+        return PartTarget::StitchingLine;                                       \
     return PartTarget::Model;                                                   \
 }
 const char *PartTargetToString(PartTarget target);
@@ -54,6 +57,8 @@ const char *PartTargetToString(PartTarget target)
             return "Model";                                                     \
         case PartTarget::CutFace:                                               \
             return "CutFace";                                                   \
+        case PartTarget::StitchingLine:                                         \
+            return "StitchingLine";                                             \
         default:                                                                \
             return "Model";                                                     \
     }                                                                           \
@@ -67,6 +72,8 @@ std::string PartTargetToDispName(PartTarget target)
             return std::string("Model");                                        \
         case PartTarget::CutFace:                                               \
             return std::string("Cut Face");                                     \
+        case PartTarget::StitchingLine:                                         \
+            return std::string("Stitching Line");                               \
         default:                                                                \
             return std::string("Model");                                        \
     }                                                                           \

dust3d/mesh/mesh_combiner.cc

@@ -31,31 +31,28 @@ namespace dust3d
 
 MeshCombiner::Mesh::Mesh(const std::vector<Vector3> &vertices, const std::vector<std::vector<size_t>> &faces)
 {
-    m_vertices = new std::vector<Vector3>(vertices);
+    m_vertices = std::make_unique<std::vector<Vector3>>(vertices);
-    m_triangles = new std::vector<std::vector<size_t>>;
+    m_triangles = std::make_unique<std::vector<std::vector<size_t>>>();
-    triangulate(vertices, faces, m_triangles);
+    triangulate(vertices, faces, m_triangles.get());
-    m_solidMesh = new SolidMesh;
+    m_solidMesh = std::make_unique<SolidMesh>();
-    m_solidMesh->setVertices(m_vertices);
+    m_solidMesh->setVertices(m_vertices.get());
-    m_solidMesh->setTriangles(m_triangles);
+    m_solidMesh->setTriangles(m_triangles.get());
     m_solidMesh->prepare();
 }
 
 MeshCombiner::Mesh::Mesh(const Mesh &other)
 {
-    m_vertices = new std::vector<Vector3>;
+    m_vertices = std::make_unique<std::vector<Vector3>>();
-    m_triangles = new std::vector<std::vector<size_t>>;
+    m_triangles = std::make_unique<std::vector<std::vector<size_t>>>();
     other.fetch(*m_vertices, *m_triangles);
-    m_solidMesh = new SolidMesh;
+    m_solidMesh = std::make_unique<SolidMesh>();
-    m_solidMesh->setVertices(m_vertices);
+    m_solidMesh->setVertices(m_vertices.get());
-    m_solidMesh->setTriangles(m_triangles);
+    m_solidMesh->setTriangles(m_triangles.get());
     m_solidMesh->prepare();
 }
 
 MeshCombiner::Mesh::~Mesh()
 {
-    delete m_solidMesh;
-    delete m_vertices;
-    delete m_triangles;
 }
 
 void MeshCombiner::Mesh::fetch(std::vector<Vector3> &vertices, std::vector<std::vector<size_t>> &faces) const
@@ -72,19 +69,13 @@ bool MeshCombiner::Mesh::isNull() const
     return nullptr == m_vertices || m_vertices->empty();
 }
 
-bool MeshCombiner::Mesh::isCombinable() const
-{
-    return true;
-}
-
 MeshCombiner::Mesh *MeshCombiner::combine(const Mesh &firstMesh, const Mesh &secondMesh, Method method,
     std::vector<std::pair<Source, size_t>> *combinedVerticesComeFrom)
 {
-    if (firstMesh.isNull() || !firstMesh.isCombinable() ||
+    if (firstMesh.isNull() || secondMesh.isNull())
-			secondMesh.isNull() || !secondMesh.isCombinable())
 		return nullptr;
 
-    SolidMeshBooleanOperation booleanOperation(firstMesh.m_solidMesh, secondMesh.m_solidMesh);
+    SolidMeshBooleanOperation booleanOperation(firstMesh.m_solidMesh.get(), secondMesh.m_solidMesh.get());
     if (!booleanOperation.combine())
         return nullptr;
     
@@ -96,14 +87,14 @@ MeshCombiner::Mesh *MeshCombiner::combine(const Mesh &firstMesh, const Mesh &sec
         if (nullptr == vertices)
             return;
         for (const auto &point: *vertices) {
-            auto insertResult = verticesSourceMap.insert({{point.x(), point.y(), point.z()}, 
+            verticesSourceMap.insert({{point.x(), point.y(), point.z()}, 
                 {source, vertexIndex}});
             ++vertexIndex;
         }
     };
     if (nullptr != combinedVerticesComeFrom) {
-        addToSourceMap(firstMesh.m_solidMesh, Source::First);
+        addToSourceMap(firstMesh.m_solidMesh.get(), Source::First);
-        addToSourceMap(secondMesh.m_solidMesh, Source::Second);
+        addToSourceMap(secondMesh.m_solidMesh.get(), Source::Second);
     }
     
     std::vector<std::vector<size_t>> resultTriangles;

dust3d/mesh/mesh_combiner.h

@@ -24,6 +24,7 @@
 #define DUST3D_MESH_MESH_COMBINER_H_
 
 #include <vector>
+#include <memory>
 #include <dust3d/base/vector3.h>
 #include <dust3d/mesh/solid_mesh.h>
 
@@ -55,14 +56,13 @@ public:
         ~Mesh();
         void fetch(std::vector<Vector3> &vertices, std::vector<std::vector<size_t>> &faces) const;
         bool isNull() const;
-        bool isCombinable() const;
         
         friend MeshCombiner;
         
     private:
-        SolidMesh *m_solidMesh = nullptr;
+        std::unique_ptr<SolidMesh> m_solidMesh;
-        std::vector<Vector3> *m_vertices = nullptr;
+        std::unique_ptr<std::vector<Vector3>> m_vertices;
-        std::vector<std::vector<size_t>> *m_triangles = nullptr;
+        std::unique_ptr<std::vector<std::vector<size_t>>> m_triangles;
     };
     
     static Mesh *combine(const Mesh &firstMesh, const Mesh &secondMesh, Method method,

dust3d/mesh/mesh_generator.cc

@@ -375,7 +375,7 @@ void MeshGenerator::cutFaceStringToCutTemplate(const std::string &cutFaceString,
     }
 }
 
-MeshCombiner::Mesh *MeshGenerator::combinePartMesh(const std::string &partIdString, bool *hasError, bool *retryable, bool addIntermediateNodes)
+std::unique_ptr<MeshCombiner::Mesh> MeshGenerator::combinePartMesh(const std::string &partIdString, bool *hasError, bool *retryable, bool addIntermediateNodes)
 {
     auto findPart = m_snapshot->parts.find(partIdString);
     if (findPart == m_snapshot->parts.end()) {
@@ -473,7 +473,6 @@ MeshCombiner::Mesh *MeshGenerator::combinePartMesh(const std::string &partIdStri
     partCache.previewVertices.clear();
     partCache.isSuccessful = false;
     partCache.joined = (target == PartTarget::Model && !isDisabled);
-    partCache.releaseMeshes();
     
     struct NodeInfo
     {
@@ -545,7 +544,6 @@ MeshCombiner::Mesh *MeshGenerator::combinePartMesh(const std::string &partIdStri
     bool buildSucceed = false;
     std::map<std::string, int> nodeIdStringToIndexMap;
     std::map<int, std::string> nodeIndexToIdStringMap;
-    StrokeModifier *strokeModifier = nullptr;
     
     auto addNodeToPartCache = [&](const std::string &nodeIdString, const NodeInfo &nodeInfo) {
         ObjectNode objectNode;
@@ -575,7 +573,7 @@ MeshCombiner::Mesh *MeshGenerator::combinePartMesh(const std::string &partIdStri
         });
     };
     
-    strokeModifier = new StrokeModifier;
+    auto strokeModifier = std::make_unique<StrokeModifier>();
     
     if (smooth)
         strokeModifier->enableSmooth();
@@ -626,7 +624,7 @@ MeshCombiner::Mesh *MeshGenerator::combinePartMesh(const std::string &partIdStri
     
     std::vector<size_t> sourceNodeIndices;
     
-    StrokeMeshBuilder *strokeMeshBuilder = new StrokeMeshBuilder;
+    auto strokeMeshBuilder = std::make_unique<StrokeMeshBuilder>();
         
     strokeMeshBuilder->setDeformThickness(deformThickness);
     strokeMeshBuilder->setDeformWidth(deformWidth);
@@ -680,14 +678,11 @@ MeshCombiner::Mesh *MeshGenerator::combinePartMesh(const std::string &partIdStri
         partCache.objectNodeVertices.push_back({position, {partIdString, nodeIdString}});
     }
     
-    delete strokeMeshBuilder;
-    strokeMeshBuilder = nullptr;
-    
     bool hasMeshError = false;
-    MeshCombiner::Mesh *mesh = nullptr;
+    std::unique_ptr<MeshCombiner::Mesh> mesh;
     
     if (buildSucceed) {
-        mesh = new MeshCombiner::Mesh(partCache.vertices, partCache.faces);
+        mesh = std::make_unique<MeshCombiner::Mesh>(partCache.vertices, partCache.faces);
         if (mesh->isNull()) {
             hasMeshError = true;
         }
@@ -698,7 +693,6 @@ MeshCombiner::Mesh *MeshGenerator::combinePartMesh(const std::string &partIdStri
     std::vector<Vector3> partPreviewVertices;
     Color partPreviewColor = partColor;
     if (nullptr != mesh) {
-        partCache.mesh = new MeshCombiner::Mesh(*mesh);
         mesh->fetch(partPreviewVertices, partCache.previewTriangles);
         partCache.previewVertices = partPreviewVertices;
         partCache.isSuccessful = true;
@@ -747,21 +741,16 @@ MeshCombiner::Mesh *MeshGenerator::combinePartMesh(const std::string &partIdStri
         }
     }
     
-    delete strokeModifier;
-    
     if (mesh && mesh->isNull()) {
-        delete mesh;
+        mesh.reset();
-        mesh = nullptr;
     }
     
     if (isDisabled) {
-        delete mesh;
+        mesh.reset();
-        mesh = nullptr;
     }
     
     if (target != PartTarget::Model) {
-        delete mesh;
+        mesh.reset();
-        mesh = nullptr;
     }
     
     if (hasMeshError && target == PartTarget::Model) {
@@ -820,9 +809,9 @@ std::string MeshGenerator::componentColorName(const std::map<std::string, std::s
     return std::string();
 }
 
-MeshCombiner::Mesh *MeshGenerator::combineComponentMesh(const std::string &componentIdString, CombineMode *combineMode)
+std::unique_ptr<MeshCombiner::Mesh> MeshGenerator::combineComponentMesh(const std::string &componentIdString, CombineMode *combineMode)
 {
-    MeshCombiner::Mesh *mesh = nullptr;
+    std::unique_ptr<MeshCombiner::Mesh> mesh;
     
     Uuid componentId;
     const std::map<std::string, std::string> *component = &m_snapshot->rootComponent;
@@ -842,7 +831,7 @@ MeshCombiner::Mesh *MeshGenerator::combineComponentMesh(const std::string &compo
     if (m_cacheEnabled) {
         if (m_dirtyComponentIds.find(componentIdString) == m_dirtyComponentIds.end()) {
             if (nullptr != componentCache.mesh)
-                return new MeshCombiner::Mesh(*componentCache.mesh);
+                return std::make_unique<MeshCombiner::Mesh>(*componentCache.mesh);
         }
     }
     
@@ -851,7 +840,7 @@ MeshCombiner::Mesh *MeshGenerator::combineComponentMesh(const std::string &compo
     componentCache.objectNodes.clear();
     componentCache.objectEdges.clear();
     componentCache.objectNodeVertices.clear();
-    componentCache.releaseMeshes();
+    componentCache.mesh.reset();
     
     std::string linkDataType = String::valueOrEmpty(*component, "linkDataType");
     if ("partId" == linkDataType) {
@@ -860,8 +849,7 @@ MeshCombiner::Mesh *MeshGenerator::combineComponentMesh(const std::string &compo
         bool retryable = true;
         mesh = combinePartMesh(partIdString, &hasError, &retryable, m_interpolationEnabled);
         if (hasError) {
-            delete mesh;
+            mesh.reset();
-            mesh = nullptr;
             if (retryable && m_interpolationEnabled) {
                 hasError = false;
                 mesh = combinePartMesh(partIdString, &hasError, &retryable, false);
@@ -870,7 +858,6 @@ MeshCombiner::Mesh *MeshGenerator::combineComponentMesh(const std::string &compo
                 m_isSuccessful = false;
             }
         }
-        
         const auto &partCache = m_cacheContext->parts[partIdString];
         for (const auto &vertex: partCache.vertices)
             componentCache.noneSeamVertices.insert(vertex);
@@ -882,19 +869,13 @@ MeshCombiner::Mesh *MeshGenerator::combineComponentMesh(const std::string &compo
         for (const auto &it: partCache.objectNodeVertices)
             componentCache.objectNodeVertices.push_back(it);
     } else {
-        std::vector<std::pair<CombineMode, std::vector<std::pair<std::string, std::string>>>> combineGroups;
+        std::vector<std::pair<CombineMode, std::vector<std::string>>> combineGroups;
-        // Firstly, group by combine mode
         int currentGroupIndex = -1;
         auto lastCombineMode = CombineMode::Count;
-        bool foundColorSolubilitySetting = false;
         for (const auto &childIdString: String::split(String::valueOrEmpty(*component, "children"), ',')) {
             if (childIdString.empty())
                 continue;
             const auto &child = findComponent(childIdString);
-            std::string colorName = componentColorName(child);
-            if (colorName == "+") {
-                foundColorSolubilitySetting = true;
-            }
             auto combineMode = componentCombineMode(child);
             if (lastCombineMode != combineMode || lastCombineMode == CombineMode::Inversion) {
                 combineGroups.push_back({combineMode, {}});
@@ -904,162 +885,87 @@ MeshCombiner::Mesh *MeshGenerator::combineComponentMesh(const std::string &compo
             if (-1 == currentGroupIndex) {
                 continue;
             }
-            combineGroups[currentGroupIndex].second.push_back({childIdString, colorName});
+            combineGroups[currentGroupIndex].second.push_back(childIdString);
         }
-        // Secondly, sub group by color
+        std::vector<std::tuple<std::unique_ptr<MeshCombiner::Mesh>, CombineMode, std::string>> groupMeshes;
-        std::vector<std::tuple<MeshCombiner::Mesh *, CombineMode, std::string>> groupMeshes;
         for (const auto &group: combineGroups) {
-            std::set<size_t> used;
+            auto childMesh = combineComponentChildGroupMesh(group.second, componentCache);
-            std::vector<std::vector<std::string>> componentIdStrings;
+            if (nullptr == childMesh || childMesh->isNull())
-            int currentSubGroupIndex = -1;
-            auto lastColorName = std::string();
-            for (size_t i = 0; i < group.second.size(); ++i) {
-                if (used.find(i) != used.end())
-                    continue;
-                //const auto &colorName = group.second[i].second;
-                const std::string colorName = "white"; // Force to use the same color = deactivate combine by color
-                if (lastColorName != colorName || lastColorName.empty()) {
-                    componentIdStrings.push_back({});
-                    ++currentSubGroupIndex;
-                    lastColorName = colorName;
-                }
-                if (-1 == currentSubGroupIndex) {
-                    continue;
-                }
-                used.insert(i);
-                componentIdStrings[currentSubGroupIndex].push_back(group.second[i].first);
-                if (colorName.empty())
-                    continue;
-                for (size_t j = i + 1; j < group.second.size(); ++j) {
-                    if (used.find(j) != used.end())
-                        continue;
-                    const auto &otherColorName = group.second[j].second;
-                    if (otherColorName.empty())
-                        continue;
-                    if (otherColorName != colorName)
-                        continue;
-                    used.insert(j);
-                    componentIdStrings[currentSubGroupIndex].push_back(group.second[j].first);
-                }
-            }
-            std::vector<std::tuple<MeshCombiner::Mesh *, CombineMode, std::string>> multipleMeshes;
-            std::vector<std::string> subGroupMeshIdStringList;
-            for (const auto &it: componentIdStrings) {
-                std::vector<std::string> componentChildGroupIdStringList;
-                for (const auto &componentChildGroupIdString: it)
-                    componentChildGroupIdStringList.push_back(componentChildGroupIdString);
-                MeshCombiner::Mesh *childMesh = combineComponentChildGroupMesh(it, componentCache);
-                if (nullptr == childMesh)
-                    continue;
-                if (childMesh->isNull()) {
-                    delete childMesh;
-                    continue;
-                }
-                std::string componentChildGroupIdStringListString = String::join(componentChildGroupIdStringList, "|");
-                subGroupMeshIdStringList.push_back(componentChildGroupIdStringListString);
-                multipleMeshes.push_back(std::make_tuple(childMesh, CombineMode::Normal, componentChildGroupIdStringListString));
-            }
-            MeshCombiner::Mesh *subGroupMesh = combineMultipleMeshes(multipleMeshes, true/*foundColorSolubilitySetting*/);
-            if (nullptr == subGroupMesh)
                 continue;
-            groupMeshes.push_back(std::make_tuple(subGroupMesh, group.first, String::join(subGroupMeshIdStringList, "&")));
+            groupMeshes.emplace_back(std::make_tuple(std::move(childMesh), group.first, String::join(group.second, "|")));
         }
-        mesh = combineMultipleMeshes(groupMeshes, true);
+        mesh = combineMultipleMeshes(std::move(groupMeshes), true);
     }
     
     if (nullptr != mesh)
-        componentCache.mesh = new MeshCombiner::Mesh(*mesh);
+        componentCache.mesh = std::make_unique<MeshCombiner::Mesh>(*mesh);
     
     if (nullptr != mesh && mesh->isNull()) {
-        delete mesh;
+        mesh.reset();
-        mesh = nullptr;
-    }
-    
-    if (componentId.isNull()) {
-        // Prepare cloth collision shap
-        if (nullptr != mesh && !mesh->isNull()) {
-            m_clothCollisionVertices.clear();
-            m_clothCollisionTriangles.clear();
-            mesh->fetch(m_clothCollisionVertices, m_clothCollisionTriangles);
-        } else {
-            // TODO: when no body is valid, may add ground plane as collision shape
-            // ... ...
-        }
     }
     
     return mesh;
 }
 
-MeshCombiner::Mesh *MeshGenerator::combineMultipleMeshes(const std::vector<std::tuple<MeshCombiner::Mesh *, CombineMode, std::string>> &multipleMeshes, bool recombine)
+std::unique_ptr<MeshCombiner::Mesh> MeshGenerator::combineMultipleMeshes(std::vector<std::tuple<std::unique_ptr<MeshCombiner::Mesh>, CombineMode, std::string>> &&multipleMeshes, bool recombine)
 {
-    MeshCombiner::Mesh *mesh = nullptr;
+    std::unique_ptr<MeshCombiner::Mesh> mesh;
     std::string meshIdStrings;
-    for (const auto &it: multipleMeshes) {
+    for (auto &it: multipleMeshes) {
+        auto subMesh = std::move(std::get<0>(it));
         const auto &childCombineMode = std::get<1>(it);
-        MeshCombiner::Mesh *subMesh = std::get<0>(it);
         const std::string &subMeshIdString = std::get<2>(it);
         if (nullptr == subMesh || subMesh->isNull()) {
-            delete subMesh;
-            continue;
-        }
-        if (!subMesh->isCombinable()) {
-            // TODO: Collect vertices
-            delete subMesh;
             continue;
         }
         if (nullptr == mesh) {
-            mesh = subMesh;
+            mesh = std::move(subMesh);
             meshIdStrings = subMeshIdString;
+            continue;
+        } 
+        auto combinerMethod = childCombineMode == CombineMode::Inversion ?
+                MeshCombiner::Method::Diff : MeshCombiner::Method::Union;
+        auto combinerMethodString = combinerMethod == MeshCombiner::Method::Union ?
+            "+" : "-";
+        meshIdStrings += combinerMethodString + subMeshIdString;
+        if (recombine)
+            meshIdStrings += "!";
+        std::unique_ptr<MeshCombiner::Mesh> newMesh;
+        auto findCached = m_cacheContext->cachedCombination.find(meshIdStrings);
+        if (findCached != m_cacheContext->cachedCombination.end()) {
+            if (nullptr != findCached->second) {
+                newMesh = std::make_unique<MeshCombiner::Mesh>(*findCached->second);
+            }
         } else {
-            auto combinerMethod = childCombineMode == CombineMode::Inversion ?
+            newMesh = combineTwoMeshes(*mesh,
-                    MeshCombiner::Method::Diff : MeshCombiner::Method::Union;
+                *subMesh,
-            auto combinerMethodString = combinerMethod == MeshCombiner::Method::Union ?
+                combinerMethod,
-                "+" : "-";
+                recombine);
-            meshIdStrings += combinerMethodString + subMeshIdString;
+            if (nullptr != newMesh)
-            if (recombine)
+                m_cacheContext->cachedCombination.insert({meshIdStrings, std::make_unique<MeshCombiner::Mesh>(*newMesh)});
-                meshIdStrings += "!";
+            else
-            MeshCombiner::Mesh *newMesh = nullptr;
+                m_cacheContext->cachedCombination.insert({meshIdStrings, nullptr});
-            auto findCached = m_cacheContext->cachedCombination.find(meshIdStrings);
+        }
-            if (findCached != m_cacheContext->cachedCombination.end()) {
+        if (newMesh && !newMesh->isNull()) {
-                if (nullptr != findCached->second) {
+            mesh = std::move(newMesh);
-                    newMesh = new MeshCombiner::Mesh(*findCached->second);
+        } else {
-                }
+            m_isSuccessful = false;
-            } else {
-                newMesh = combineTwoMeshes(*mesh,
-                    *subMesh,
-                    combinerMethod,
-                    recombine);
-                delete subMesh;
-                if (nullptr != newMesh)
-                    m_cacheContext->cachedCombination.insert({meshIdStrings, new MeshCombiner::Mesh(*newMesh)});
-                else
-                    m_cacheContext->cachedCombination.insert({meshIdStrings, nullptr});
-            }
-            if (newMesh && !newMesh->isNull()) {
-                delete mesh;
-                mesh = newMesh;
-            } else {
-                m_isSuccessful = false;
-                delete newMesh;
-            }
         }
     }
     if (nullptr != mesh && mesh->isNull()) {
-        delete mesh;
+        mesh.reset();
-        mesh = nullptr;
     }
     return mesh;
 }
 
-MeshCombiner::Mesh *MeshGenerator::combineComponentChildGroupMesh(const std::vector<std::string> &componentIdStrings, GeneratedComponent &componentCache)
+std::unique_ptr<MeshCombiner::Mesh> MeshGenerator::combineComponentChildGroupMesh(const std::vector<std::string> &componentIdStrings, GeneratedComponent &componentCache)
 {
-    std::vector<std::tuple<MeshCombiner::Mesh *, CombineMode, std::string>> multipleMeshes;
+    std::vector<std::tuple<std::unique_ptr<MeshCombiner::Mesh>, CombineMode, std::string>> multipleMeshes;
     for (const auto &childIdString: componentIdStrings) {
         CombineMode childCombineMode = CombineMode::Normal;
-        MeshCombiner::Mesh *subMesh = combineComponentMesh(childIdString, &childCombineMode);
+        std::unique_ptr<MeshCombiner::Mesh> subMesh = combineComponentMesh(childIdString, &childCombineMode);
         
         if (CombineMode::Uncombined == childCombineMode) {
-            delete subMesh;
             continue;
         }
         
@@ -1076,31 +982,25 @@ MeshCombiner::Mesh *MeshGenerator::combineComponentChildGroupMesh(const std::vec
             componentCache.objectNodeVertices.push_back(it);
         
         if (nullptr == subMesh || subMesh->isNull()) {
-            delete subMesh;
-            continue;
-        }
-        
-        if (!subMesh->isCombinable()) {
-            componentCache.incombinableMeshes.push_back(subMesh);
             continue;
         }
     
-        multipleMeshes.push_back(std::make_tuple(subMesh, childCombineMode, childIdString));
+        multipleMeshes.emplace_back(std::make_tuple(std::move(subMesh), childCombineMode, childIdString));
     }
-    return combineMultipleMeshes(multipleMeshes);
+    return combineMultipleMeshes(std::move(multipleMeshes));
 }
 
-MeshCombiner::Mesh *MeshGenerator::combineTwoMeshes(const MeshCombiner::Mesh &first, const MeshCombiner::Mesh &second,
+std::unique_ptr<MeshCombiner::Mesh> MeshGenerator::combineTwoMeshes(const MeshCombiner::Mesh &first, const MeshCombiner::Mesh &second,
     MeshCombiner::Method method,
     bool recombine)
 {
     if (first.isNull() || second.isNull())
         return nullptr;
     std::vector<std::pair<MeshCombiner::Source, size_t>> combinedVerticesSources;
-    MeshCombiner::Mesh *newMesh = MeshCombiner::combine(first,
+    auto newMesh = std::unique_ptr<MeshCombiner::Mesh>(MeshCombiner::combine(first,
         second,
         method,
-        &combinedVerticesSources);
+        &combinedVerticesSources));
     if (nullptr == newMesh)
         return nullptr;
     if (!newMesh->isNull() && recombine) {
@@ -1112,18 +1012,14 @@ MeshCombiner::Mesh *MeshGenerator::combineTwoMeshes(const MeshCombiner::Mesh &fi
         recombiner.setFaces(&combinedFaces);
         if (recombiner.recombine()) {
             if (isWatertight(recombiner.regeneratedFaces())) {
-                MeshCombiner::Mesh *reMesh = new MeshCombiner::Mesh(recombiner.regeneratedVertices(), recombiner.regeneratedFaces());
+                auto reMesh = std::make_unique<MeshCombiner::Mesh>(recombiner.regeneratedVertices(), recombiner.regeneratedFaces());
-                if (!reMesh->isNull() && reMesh->isCombinable()) {
+                if (!reMesh->isNull()) {
-                    delete newMesh;
+                    newMesh = std::move(reMesh);
-                    newMesh = reMesh;
-                } else {
-                    delete reMesh;
                 }
             }
         }
     }
     if (newMesh->isNull()) {
-        delete newMesh;
         return nullptr;
     }
     return newMesh;
@@ -1245,23 +1141,6 @@ void MeshGenerator::postprocessObject(Object *object)
     object->setTriangleVertexNormals(triangleVertexNormals);
 }
 
-void MeshGenerator::collectIncombinableComponentMeshes(const std::string &componentIdString)
-{
-    const auto &component = findComponent(componentIdString);
-    if (CombineMode::Uncombined == componentCombineMode(component))
-        return;
-    const auto &componentCache = m_cacheContext->components[componentIdString];
-    for (const auto &mesh: componentCache.incombinableMeshes) {
-        m_isSuccessful = false;
-        collectIncombinableMesh(mesh, componentCache);
-    }
-    for (const auto &childIdString: String::split(String::valueOrEmpty(*component, "children"), ',')) {
-        if (childIdString.empty())
-            continue;
-        collectIncombinableComponentMeshes(childIdString);
-    }
-}
-
 void MeshGenerator::collectIncombinableMesh(const MeshCombiner::Mesh *mesh, const GeneratedComponent &componentCache)
 {
     if (nullptr == mesh)
@@ -1302,7 +1181,7 @@ void MeshGenerator::collectUncombinedComponent(const std::string &componentIdStr
         m_object->edges.insert(m_object->edges.end(), componentCache.objectEdges.begin(), componentCache.objectEdges.end());
         m_nodeVertices.insert(m_nodeVertices.end(), componentCache.objectNodeVertices.begin(), componentCache.objectNodeVertices.end());
         
-        collectIncombinableMesh(componentCache.mesh, componentCache);
+        collectIncombinableMesh(componentCache.mesh.get(), componentCache);
         return;
     }
     for (const auto &childIdString: String::split(String::valueOrEmpty(*component, "children"), ',')) {
@@ -1459,7 +1338,6 @@ void MeshGenerator::generate()
                     }
                     m_cacheContext->partMirrorIdMap.erase(mirrorFrom);
                 }
-                it->second.releaseMeshes();
                 it = m_cacheContext->parts.erase(it);
                 continue;
             }
@@ -1469,13 +1347,11 @@ void MeshGenerator::generate()
             if (m_snapshot->components.find(it->first) == m_snapshot->components.end()) {
                 for (auto combinationIt = m_cacheContext->cachedCombination.begin(); combinationIt != m_cacheContext->cachedCombination.end(); ) {
                     if (std::string::npos != combinationIt->first.find(it->first)) {
-                        delete combinationIt->second;
                         combinationIt = m_cacheContext->cachedCombination.erase(combinationIt);
                         continue;
                     }
                     combinationIt++;
                 }
-                it->second.releaseMeshes();
                 it = m_cacheContext->components.erase(it);
                 continue;
             }
@@ -1489,7 +1365,6 @@ void MeshGenerator::generate()
     for (const auto &dirtyComponentId: m_dirtyComponentIds) {
         for (auto combinationIt = m_cacheContext->cachedCombination.begin(); combinationIt != m_cacheContext->cachedCombination.end(); ) {
             if (std::string::npos != combinationIt->first.find(dirtyComponentId)) {
-                delete combinationIt->second;
                 combinationIt = m_cacheContext->cachedCombination.erase(combinationIt);
                 continue;
             }
@@ -1533,13 +1408,10 @@ void MeshGenerator::generate()
     
     // Recursively check uncombined components
     collectUncombinedComponent(to_string(Uuid()));
-    collectIncombinableComponentMeshes(to_string(Uuid()));
     
     collectErroredParts();
     postprocessObject(m_object);
 
-    delete combinedMesh;
-
     if (needDeleteCacheContext) {
         delete m_cacheContext;
         m_cacheContext = nullptr;

dust3d/mesh/mesh_generator.h

@@ -40,19 +40,8 @@ class MeshGenerator
 {
 public:
 
-    class GeneratedPart
+    struct GeneratedPart
     {
-    public:
-        ~GeneratedPart()
-        {
-            releaseMeshes();
-        };
-        void releaseMeshes()
-        {
-            delete mesh;
-            mesh = nullptr;
-        }
-        MeshCombiner::Mesh *mesh = nullptr;
         std::vector<Vector3> vertices;
         std::vector<std::vector<size_t>> faces;
         std::vector<ObjectNode> objectNodes;
@@ -64,23 +53,9 @@ public:
         bool joined = true;
     };
 
-    class GeneratedComponent
+    struct GeneratedComponent
     {
-    public:
+        std::unique_ptr<MeshCombiner::Mesh> mesh;
-        ~GeneratedComponent()
-        {
-            releaseMeshes();
-        };
-        void releaseMeshes()
-        {
-            delete mesh;
-            mesh = nullptr;
-            for (auto &it: incombinableMeshes)
-                delete it;
-            incombinableMeshes.clear();
-        }
-        MeshCombiner::Mesh *mesh = nullptr;
-        std::vector<MeshCombiner::Mesh *> incombinableMeshes;
         std::set<std::pair<PositionKey, PositionKey>> sharedQuadEdges;
         std::set<PositionKey> noneSeamVertices;
         std::vector<ObjectNode> objectNodes;
@@ -88,27 +63,16 @@ public:
         std::vector<std::pair<Vector3, std::pair<Uuid, Uuid>>> objectNodeVertices;
     };
 
-    class GeneratedCacheContext
+    struct GeneratedCacheContext
     {
-    public:
-        ~GeneratedCacheContext()
-        {
-            for (auto &it: cachedCombination)
-                delete it.second;
-            for (auto &it: parts)
-                it.second.releaseMeshes();
-            for (auto &it: components)
-                it.second.releaseMeshes();
-        }
         std::map<std::string, GeneratedComponent> components;
         std::map<std::string, GeneratedPart> parts;
         std::map<std::string, std::string> partMirrorIdMap;
-        std::map<std::string, MeshCombiner::Mesh *> cachedCombination;
+        std::map<std::string, std::unique_ptr<MeshCombiner::Mesh>> cachedCombination;
     };
     
-    class PartPreview
+    struct PartPreview
     {
-    public:
         std::vector<Vector2> cutTemplate;
         
         std::vector<Vector3> vertices;
@@ -156,25 +120,22 @@ private:
     bool m_cacheEnabled = false;
     float m_smoothShadingThresholdAngleDegrees = 60;
     uint64_t m_id = 0;
-    std::vector<Vector3> m_clothCollisionVertices;
-    std::vector<std::vector<size_t>> m_clothCollisionTriangles;
     bool m_weldEnabled = true;
     bool m_interpolationEnabled = true;
     
     void collectParts();
-    void collectIncombinableComponentMeshes(const std::string &componentIdString);
     void collectIncombinableMesh(const MeshCombiner::Mesh *mesh, const GeneratedComponent &componentCache);
     bool checkIsComponentDirty(const std::string &componentIdString);
     bool checkIsPartDirty(const std::string &partIdString);
     bool checkIsPartDependencyDirty(const std::string &partIdString);
     void checkDirtyFlags();
-    MeshCombiner::Mesh *combinePartMesh(const std::string &partIdString, bool *hasError, bool *retryable, bool addIntermediateNodes=true);
+    std::unique_ptr<MeshCombiner::Mesh> combinePartMesh(const std::string &partIdString, bool *hasError, bool *retryable, bool addIntermediateNodes=true);
-    MeshCombiner::Mesh *combineComponentMesh(const std::string &componentIdString, CombineMode *combineMode);
+    std::unique_ptr<MeshCombiner::Mesh> combineComponentMesh(const std::string &componentIdString, CombineMode *combineMode);
     void makeXmirror(const std::vector<Vector3> &sourceVertices, const std::vector<std::vector<size_t>> &sourceFaces,
         std::vector<Vector3> *destVertices, std::vector<std::vector<size_t>> *destFaces);
     void collectSharedQuadEdges(const std::vector<Vector3> &vertices, const std::vector<std::vector<size_t>> &faces,
         std::set<std::pair<PositionKey, PositionKey>> *sharedQuadEdges);
-    MeshCombiner::Mesh *combineTwoMeshes(const MeshCombiner::Mesh &first, const MeshCombiner::Mesh &second,
+    std::unique_ptr<MeshCombiner::Mesh> combineTwoMeshes(const MeshCombiner::Mesh &first, const MeshCombiner::Mesh &second,
         MeshCombiner::Method method,
         bool recombine=true);
     void generateSmoothTriangleVertexNormals(const std::vector<Vector3> &vertices, const std::vector<std::vector<size_t>> &triangles,
@@ -182,9 +143,9 @@ private:
         std::vector<std::vector<Vector3>> *triangleVertexNormals);
     const std::map<std::string, std::string> *findComponent(const std::string &componentIdString);
     CombineMode componentCombineMode(const std::map<std::string, std::string> *component);
-    MeshCombiner::Mesh *combineComponentChildGroupMesh(const std::vector<std::string> &componentIdStrings,
+    std::unique_ptr<MeshCombiner::Mesh> combineComponentChildGroupMesh(const std::vector<std::string> &componentIdStrings,
         GeneratedComponent &componentCache);
-    MeshCombiner::Mesh *combineMultipleMeshes(const std::vector<std::tuple<MeshCombiner::Mesh *, CombineMode, std::string>> &multipleMeshes, bool recombine=true);
+    std::unique_ptr<MeshCombiner::Mesh> combineMultipleMeshes(std::vector<std::tuple<std::unique_ptr<MeshCombiner::Mesh>, CombineMode, std::string>> &&multipleMeshes, bool recombine=true);
     std::string componentColorName(const std::map<std::string, std::string> *component);
     void collectUncombinedComponent(const std::string &componentIdString);
     void cutFaceStringToCutTemplate(const std::string &cutFaceString, std::vector<Vector2> &cutTemplate);

dust3d/mesh/stitch_mesh_builder.cc

@@ -0,0 +1,153 @@
+/*
+ *  Copyright (c) 2016-2022 Jeremy HU <jeremy-at-dust3d dot org>. All rights reserved. 
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+#include <dust3d/base/debug.h>
+#include <dust3d/mesh/stitch_mesh_builder.h>
+
+namespace dust3d
+{
+
+StitchMeshBuilder::StitchMeshBuilder(std::vector<Spline> &&splines)
+{
+    m_splines = std::move(splines);
+}
+
+const std::vector<Vector3> &StitchMeshBuilder::generatedVertices()
+{
+    return m_generatedVertices;
+}
+
+const std::vector<std::vector<size_t>> &StitchMeshBuilder::generatedFaces()
+{
+    return m_generatedFaces;
+}
+
+std::vector<std::vector<StitchMeshBuilder::StitchingPoint>> StitchMeshBuilder::convertSplinesToStitchingPoints(const std::vector<Spline> &splines)
+{
+    std::vector<std::vector<StitchingPoint>> stitchingPoints(splines.size());
+    
+    size_t targetSegments = 5; // FIXME: decide target segments by ...
+    for (size_t i = 0; i < splines.size(); ++i) {
+        const auto &spline = splines[i];
+        std::vector<Vector3> polyline(spline.nodes.size());
+        for (size_t j = 0; j < spline.nodes.size(); ++j)
+            polyline[j] = spline.nodes[j].origin;
+        auto segmentPoints = splitPolylineToSegments(polyline, targetSegments);
+        stitchingPoints[i].resize(segmentPoints.size());
+        for (size_t k = 0; k < segmentPoints.size(); ++k) {
+            stitchingPoints[i][k].originVertex = m_generatedVertices.size();
+            // TODO: stitchingPoints[i][k].radius = ...
+            m_generatedVertices.emplace_back(segmentPoints[k]);
+        }
+    }
+
+    return stitchingPoints;
+}
+
+double StitchMeshBuilder::segmentsLength(const std::vector<Vector3> &segmentPoints)
+{
+    double totalLength = 0.0;
+    for (size_t j = 1; j < segmentPoints.size(); ++j) {
+        size_t i = j - 1;
+        totalLength += (segmentPoints[i] - segmentPoints[j]).length();
+    }
+    return totalLength;
+}
+
+std::vector<Vector3> StitchMeshBuilder::splitPolylineToSegments(const std::vector<Vector3> &polyline,
+    size_t targetSegments)
+{
+    std::vector<Vector3> segmentPoints;
+    if (polyline.size() < 2)
+        return segmentPoints;
+    double totalLength = segmentsLength(polyline);
+    if (Math::isZero(totalLength)) {
+        Vector3 middle = (polyline.front() + polyline.back()) * 0.5;
+        for (size_t i = 0; i < targetSegments + 1; ++i) {
+            segmentPoints.push_back(middle);
+        }
+        return segmentPoints;
+    }
+    double segmentLength = totalLength / targetSegments;
+    double wantLength = segmentLength;
+    segmentPoints.push_back(polyline.front());
+    for (size_t j = 1; j < polyline.size(); ++j) {
+        size_t i = j - 1;
+        double lineLength = (polyline[j] - polyline[i]).length();
+        Vector3 polylineStart = polyline[i];
+        while (true) {
+            if (lineLength < wantLength) {
+                wantLength -= lineLength;
+                break;
+            }
+            Vector3 newPosition = (polylineStart * (lineLength - wantLength) + polyline[j] * wantLength) / lineLength;
+            segmentPoints.push_back(newPosition);
+            lineLength -= wantLength;
+            polylineStart = newPosition;
+            wantLength = segmentLength;
+        }
+    }
+    if (segmentPoints.size() < targetSegments + 1) {
+        segmentPoints.push_back(polyline.back());
+    } else {
+        segmentPoints.back() = polyline.back();
+    }
+    return segmentPoints;
+}
+
+void StitchMeshBuilder::generateMeshFromStitchingPoints(const std::vector<std::vector<StitchMeshBuilder::StitchingPoint>> &stitchingPoints)
+{
+    for (size_t j = 1; j < stitchingPoints.size(); ++j) {
+        size_t i = j - 1;
+        generateMeshFromStitchingPoints(stitchingPoints[i], stitchingPoints[j]);
+    }
+}
+
+void StitchMeshBuilder::generateMeshFromStitchingPoints(const std::vector<StitchMeshBuilder::StitchingPoint> &a, 
+    const std::vector<StitchMeshBuilder::StitchingPoint> &b)
+{
+    if (a.size() != b.size()) {
+        dust3dDebug << "Unmatch sizes of stitching points, a:" << a.size() << "b:" << b.size();
+        return;
+    }
+    if (a.size() < 2) {
+        dust3dDebug << "Expected at least two stitching points, current:" << a.size();
+        return;
+    }
+    for (size_t j = 1; j < a.size(); ++j) {
+        size_t i = j - 1;
+        m_generatedFaces.emplace_back(std::vector<size_t> {
+            a[i].originVertex,
+            b[i].originVertex,
+            b[j].originVertex,
+            a[j].originVertex
+        });
+    }
+}
+
+void StitchMeshBuilder::build()
+{
+    std::vector<std::vector<StitchingPoint>> stitchingPoints = convertSplinesToStitchingPoints(m_splines);
+    generateMeshFromStitchingPoints(stitchingPoints);
+}
+
+}

dust3d/mesh/stitch_mesh_builder.h

@@ -0,0 +1,73 @@
+/*
+ *  Copyright (c) 2016-2022 Jeremy HU <jeremy-at-dust3d dot org>. All rights reserved. 
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+#ifndef DUST3D_MESH_STITCH_MESH_BUILDER_H_
+#define DUST3D_MESH_STITCH_MESH_BUILDER_H_
+
+#include <dust3d/base/vector3.h>
+
+namespace dust3d
+{
+
+class StitchMeshBuilder
+{
+public:
+    struct Node
+    {
+        Vector3 origin;
+        double radius;
+    };
+
+    struct Spline
+    {
+        std::vector<Node> nodes;
+        bool isCircle = false;
+    };
+
+    StitchMeshBuilder(std::vector<Spline> &&splines);
+    void build();
+    const std::vector<Vector3> &generatedVertices();
+    const std::vector<std::vector<size_t>> &generatedFaces();
+
+private:
+    struct StitchingPoint
+    {
+        size_t originVertex;
+        double radius;
+    };
+
+    std::vector<Spline> m_splines;
+    std::vector<Vector3> m_generatedVertices;
+    std::vector<std::vector<size_t>> m_generatedFaces;
+
+    std::vector<std::vector<StitchingPoint>> convertSplinesToStitchingPoints(const std::vector<Spline> &splines);
+    void generateMeshFromStitchingPoints(const std::vector<std::vector<StitchingPoint>> &stitchingPoints);
+    void generateMeshFromStitchingPoints(const std::vector<StitchingPoint> &a, 
+        const std::vector<StitchingPoint> &b);
+    std::vector<Vector3> splitPolylineToSegments(const std::vector<Vector3> &polyline,
+        size_t targetSegments);
+    double segmentsLength(const std::vector<Vector3> &segmentPoints);
+};
+
+}
+
+#endif