Add user defined cut face

Extruding shape is totally customizable now, it's not limit to predefined shapes.

dust3d.pro

@@ -295,6 +295,15 @@ HEADERS += src/cutdocument.h
 SOURCES += src/cutface.cpp
 HEADERS += src/cutface.h
 
+SOURCES += src/parttarget.cpp
+HEADERS += src/parttarget.h
+
+SOURCES += src/cutfacewidget.cpp
+HEADERS += src/cutfacewidget.h
+
+SOURCES += src/cutfacelistwidget.cpp
+HEADERS += src/cutfacelistwidget.h
+
 SOURCES += src/remoteioserver.cpp
 HEADERS += src/remoteioserver.h
 

shaders/default.vert

@@ -33,7 +33,7 @@ void main()
     vert = (modelMatrix * vertex).xyz;
     vertNormal = normalize((modelMatrix * vec4(normal, 1.0)).xyz);
     vertColor = color;
-    cameraPos = vec3(0, 0, -2.1);
+    cameraPos = vec3(0, 0, -4.0);
 
     firstLightPos = vec3(5.0, 5.0, 5.0);
     secondLightPos = vec3(-5.0, 5.0, 5.0);

src/cutface.cpp

@@ -1,4 +1,6 @@
 #include <QStringList>
+#include <QVector2D>
+#include <QVector3D>
 #include "cutface.h"
 
 IMPL_CutFaceFromString
@@ -38,3 +40,45 @@ void normalizeCutFacePoints(std::vector<QVector2D> *points)
         position.setY((position.y() - yMiddle) * 2 / longSize);
     }
 }
+
+void cutFacePointsFromNodes(std::vector<QVector2D> &points, const std::vector<std::tuple<float, float, float>> &nodes)
+{
+    if (nodes.size() < 2)
+        return;
+    std::vector<QVector2D> edges;
+    for (size_t i = 1; i < nodes.size(); ++i) {
+        const auto &previous = nodes[i - 1];
+        const auto &current = nodes[i];
+        edges.push_back((QVector2D(std::get<1>(current), std::get<2>(current)) -
+            QVector2D(std::get<1>(previous), std::get<2>(previous))).normalized());
+    }
+    std::vector<QVector2D> nodeDirections;
+    nodeDirections.push_back(edges[0]);
+    for (size_t i = 1; i < nodes.size() - 1; ++i) {
+        const auto &previousEdge = edges[i - 1];
+        const auto &nextEdge = edges[i];
+        nodeDirections.push_back((previousEdge + nextEdge).normalized());
+    }
+    nodeDirections.push_back(edges[edges.size() - 1]);
+    std::vector<std::pair<QVector2D, QVector2D>> cutPoints;
+    for (size_t i = 0; i < nodes.size(); ++i) {
+        const auto &current = nodes[i];
+        const auto &direction = nodeDirections[i];
+        const auto &radius = std::get<0>(current);
+        QVector3D origin = QVector3D(std::get<1>(current), std::get<2>(current), 0);
+        QVector3D pointer = QVector3D(direction.x(), direction.y(), 0);
+        QVector3D rotateAxis = QVector3D(0, 0, 1);
+        QVector3D u = QVector3D::crossProduct(pointer, rotateAxis).normalized();
+        QVector3D upPoint = origin + u * radius;
+        QVector3D downPoint = origin - u * radius;
+        cutPoints.push_back({QVector2D(upPoint.x(), upPoint.y()),
+            QVector2D(downPoint.x(), downPoint.y())});
+    }
+    for (const auto &it: cutPoints) {
+        points.push_back(it.first);
+    }
+    for (auto it = cutPoints.rbegin(); it != cutPoints.rend(); ++it) {
+        points.push_back(it->second);
+    }
+    normalizeCutFacePoints(&points);
+}

src/cutface.h

@@ -11,7 +11,7 @@ enum class CutFace
     Pentagon,
     Hexagon,
     Triangle,
-    //UserDefined,
+    UserDefined,
     Count
 };
 
@@ -28,6 +28,8 @@ CutFace CutFaceFromString(const char *faceString)                           \
         return CutFace::Hexagon;                                            \
     if (face == "Triangle")                                                 \
         return CutFace::Triangle;                                           \
+    if (face == "UserDefined")                                              \
+        return CutFace::UserDefined;                                        \
     return CutFace::Quad;                                                   \
 }
 QString CutFaceToString(CutFace cutFace);
@@ -43,6 +45,8 @@ QString CutFaceToString(CutFace cutFace)                                    \
             return "Hexagon";                                               \
         case CutFace::Triangle:                                             \
             return "Triangle";                                              \
+        case CutFace::UserDefined:                                          \
+            return "UserDefined";                                           \
         default:                                                            \
             return "";                                                      \
     }                                                                       \
@@ -93,5 +97,6 @@ std::vector<QVector2D> CutFaceToPoints(CutFace cutFace)                     \
 }
 
 void normalizeCutFacePoints(std::vector<QVector2D> *points);
+void cutFacePointsFromNodes(std::vector<QVector2D> &points, const std::vector<std::tuple<float, float, float>> &nodes);
 
 #endif

src/cutfacelistwidget.cpp

@@ -0,0 +1,239 @@
+#include <QGuiApplication>
+#include <QMenu>
+#include <QApplication>
+#include "cutfacelistwidget.h"
+
+CutFaceListWidget::CutFaceListWidget(const Document *document, QWidget *parent) :
+    QTreeWidget(parent),
+    m_document(document)
+{
+    setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
+    setFocusPolicy(Qt::NoFocus);
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
+    setAutoScroll(false);
+
+    setHeaderHidden(true);
+
+    QPalette palette = this->palette();
+    palette.setColor(QPalette::Window, Qt::transparent);
+    palette.setColor(QPalette::Base, Qt::transparent);
+    setPalette(palette);
+
+    setStyleSheet("QTreeView {qproperty-indentation: 0;}");
+
+    setContentsMargins(0, 0, 0, 0);
+
+    setContextMenuPolicy(Qt::CustomContextMenu);
+    connect(this, &QTreeWidget::customContextMenuRequested, this, &CutFaceListWidget::showContextMenu);
+    
+    std::set<QUuid> cutFacePartIds;
+    for (const auto &it: m_document->partMap) {
+        if (PartTarget::CutFace == it.second.target) {
+            if (cutFacePartIds.find(it.first) != cutFacePartIds.end())
+                continue;
+            cutFacePartIds.insert(it.first);
+            m_cutFacePartIdList.push_back(it.first);
+        }
+        if (!it.second.cutFaceLinkedId.isNull()) {
+            if (cutFacePartIds.find(it.second.cutFaceLinkedId) != cutFacePartIds.end())
+                continue;
+            cutFacePartIds.insert(it.second.cutFaceLinkedId);
+            m_cutFacePartIdList.push_back(it.second.cutFaceLinkedId);
+        }
+    }
+
+    reload();
+}
+
+bool CutFaceListWidget::isEmpty()
+{
+    return m_cutFacePartIdList.empty();
+}
+
+void CutFaceListWidget::enableMultipleSelection(bool enabled)
+{
+    m_multipleSelectionEnabled = enabled;
+}
+
+void CutFaceListWidget::updateCutFaceSelectState(QUuid partId, bool selected)
+{
+    auto findItemResult = m_itemMap.find(partId);
+    if (findItemResult == m_itemMap.end()) {
+        qDebug() << "Find part item failed:" << partId;
+        return;
+    }
+    CutFaceWidget *cutFaceWidget = (CutFaceWidget *)itemWidget(findItemResult->second.first, findItemResult->second.second);
+    cutFaceWidget->updateCheckedState(selected);
+}
+
+void CutFaceListWidget::selectCutFace(QUuid partId, bool multiple)
+{
+    if (multiple) {
+        if (!m_currentSelectedPartId.isNull()) {
+            m_selectedPartIds.insert(m_currentSelectedPartId);
+            m_currentSelectedPartId = QUuid();
+        }
+        if (m_selectedPartIds.find(partId) != m_selectedPartIds.end()) {
+            updateCutFaceSelectState(partId, false);
+            m_selectedPartIds.erase(partId);
+        } else {
+            if (m_multipleSelectionEnabled || m_selectedPartIds.empty()) {
+                updateCutFaceSelectState(partId, true);
+                m_selectedPartIds.insert(partId);
+            }
+        }
+        if (m_selectedPartIds.size() > 1) {
+            return;
+        }
+        if (m_selectedPartIds.size() == 1)
+            partId = *m_selectedPartIds.begin();
+        else {
+            partId = QUuid();
+            emit currentSelectedCutFaceChanged(partId);
+        }
+    }
+    if (!m_selectedPartIds.empty()) {
+        for (const auto &id: m_selectedPartIds) {
+            updateCutFaceSelectState(id, false);
+        }
+        m_selectedPartIds.clear();
+    }
+    if (m_currentSelectedPartId != partId) {
+        if (!m_currentSelectedPartId.isNull()) {
+            updateCutFaceSelectState(m_currentSelectedPartId, false);
+        }
+        m_currentSelectedPartId = partId;
+        if (!m_currentSelectedPartId.isNull()) {
+            updateCutFaceSelectState(m_currentSelectedPartId, true);
+        }
+        emit currentSelectedCutFaceChanged(m_currentSelectedPartId);
+    }
+}
+
+void CutFaceListWidget::mousePressEvent(QMouseEvent *event)
+{
+    QModelIndex itemIndex = indexAt(event->pos());
+    QTreeView::mousePressEvent(event);
+    if (event->button() == Qt::LeftButton) {
+        bool multiple = QGuiApplication::queryKeyboardModifiers().testFlag(Qt::ControlModifier);
+        if (itemIndex.isValid()) {
+            QTreeWidgetItem *item = itemFromIndex(itemIndex);
+            auto partId = QUuid(item->data(itemIndex.column(), Qt::UserRole).toString());
+            if (QGuiApplication::queryKeyboardModifiers().testFlag(Qt::ShiftModifier)) {
+                bool startAdd = false;
+                bool stopAdd = false;
+                std::vector<QUuid> waitQueue;
+                for (const auto &childId: m_cutFacePartIdList) {
+                    if (m_shiftStartPartId == childId || partId == childId) {
+                        if (startAdd) {
+                            stopAdd = true;
+                        } else {
+                            startAdd = true;
+                        }
+                    }
+                    if (startAdd)
+                        waitQueue.push_back(childId);
+                    if (stopAdd)
+                        break;
+                }
+                if (stopAdd && !waitQueue.empty()) {
+                    if (!m_selectedPartIds.empty()) {
+                        for (const auto &id: m_selectedPartIds) {
+                            updateCutFaceSelectState(id, false);
+                        }
+                        m_selectedPartIds.clear();
+                    }
+                    if (!m_currentSelectedPartId.isNull()) {
+                        m_currentSelectedPartId = QUuid();
+                    }
+                    for (const auto &waitId: waitQueue) {
+                        selectCutFace(waitId, true);
+                    }
+                }
+                return;
+            } else {
+                m_shiftStartPartId = partId;
+            }
+            selectCutFace(partId, multiple);
+            return;
+        }
+        if (!multiple)
+            selectCutFace(QUuid());
+    }
+}
+
+bool CutFaceListWidget::isCutFaceSelected(QUuid partId)
+{
+    return (m_currentSelectedPartId == partId ||
+        m_selectedPartIds.find(partId) != m_selectedPartIds.end());
+}
+
+void CutFaceListWidget::showContextMenu(const QPoint &pos)
+{
+    if (!m_hasContextMenu)
+        return;
+}
+
+void CutFaceListWidget::resizeEvent(QResizeEvent *event)
+{
+    QTreeWidget::resizeEvent(event);
+    if (calculateColumnCount() != columnCount())
+        reload();
+}
+
+int CutFaceListWidget::calculateColumnCount()
+{
+    if (nullptr == parentWidget())
+        return 0;
+
+    int columns = parentWidget()->width() / Theme::cutFacePreviewImageSize;
+    if (0 == columns)
+        columns = 1;
+    return columns;
+}
+
+void CutFaceListWidget::reload()
+{
+    removeAllContent();
+
+    int columns = calculateColumnCount();
+    if (0 == columns)
+        return;
+
+    int columnWidth = parentWidget()->width() / columns;
+
+    //qDebug() << "parentWidth:" << parentWidget()->width() << "columnWidth:" << columnWidth << "columns:" << columns;
+
+    setColumnCount(columns);
+    for (int i = 0; i < columns; i++)
+        setColumnWidth(i, columnWidth);
+
+    decltype(m_cutFacePartIdList.size()) cutFaceIndex = 0;
+    while (cutFaceIndex < m_cutFacePartIdList.size()) {
+        QTreeWidgetItem *item = new QTreeWidgetItem(this);
+        item->setFlags((item->flags() | Qt::ItemIsEnabled) & ~(Qt::ItemIsSelectable) & ~(Qt::ItemIsEditable));
+        for (int col = 0; col < columns && cutFaceIndex < m_cutFacePartIdList.size(); col++, cutFaceIndex++) {
+            const auto &partId = m_cutFacePartIdList[cutFaceIndex];
+            item->setSizeHint(col, QSize(columnWidth, CutFaceWidget::preferredHeight() + 2));
+            item->setData(col, Qt::UserRole, partId.toString());
+            CutFaceWidget *widget = new CutFaceWidget(m_document, partId);
+            setItemWidget(item, col, widget);
+            widget->reload();
+            widget->updateCheckedState(isCutFaceSelected(partId));
+            m_itemMap[partId] = std::make_pair(item, col);
+        }
+        invisibleRootItem()->addChild(item);
+    }
+}
+
+void CutFaceListWidget::setHasContextMenu(bool hasContextMenu)
+{
+    m_hasContextMenu = hasContextMenu;
+}
+
+void CutFaceListWidget::removeAllContent()
+{
+    m_itemMap.clear();
+    clear();
+}

src/cutfacelistwidget.h

@@ -0,0 +1,41 @@
+#ifndef DUST3D_CUT_FACE_LIST_WIDGET_H
+#define DUST3D_CUT_FACE_LIST_WIDGET_H
+#include <QTreeWidget>
+#include <map>
+#include <QMouseEvent>
+#include "document.h"
+#include "cutfacewidget.h"
+
+class CutFaceListWidget : public QTreeWidget
+{
+    Q_OBJECT
+signals:
+    void currentSelectedCutFaceChanged(QUuid partId);
+public:
+    CutFaceListWidget(const Document *document, QWidget *parent=nullptr);
+    bool isCutFaceSelected(QUuid partId);
+    void enableMultipleSelection(bool enabled);
+    bool isEmpty();
+public slots:
+    void reload();
+    void removeAllContent();
+    void showContextMenu(const QPoint &pos);
+    void selectCutFace(QUuid partId, bool multiple=false);
+    void setHasContextMenu(bool hasContextMenu);
+protected:
+    void resizeEvent(QResizeEvent *event) override;
+    void mousePressEvent(QMouseEvent *event) override;
+private:
+    int calculateColumnCount();
+    void updateCutFaceSelectState(QUuid partId, bool selected);
+    const Document *m_document = nullptr;
+    std::map<QUuid, std::pair<QTreeWidgetItem *, int>> m_itemMap;
+    std::set<QUuid> m_selectedPartIds;
+    QUuid m_currentSelectedPartId;
+    QUuid m_shiftStartPartId;
+    bool m_hasContextMenu = false;
+    bool m_multipleSelectionEnabled = false;
+    std::vector<QUuid> m_cutFacePartIdList;
+};
+
+#endif

src/cutfacewidget.cpp

@@ -0,0 +1,60 @@
+#include "cutfacewidget.h"
+
+CutFaceWidget::CutFaceWidget(const Document *document, QUuid partId) :
+    m_partId(partId),
+    m_document(document)
+{
+    setObjectName("CutFaceFrame");
+
+    m_previewWidget = new ModelWidget(this);
+    m_previewWidget->setAttribute(Qt::WA_TransparentForMouseEvents);
+    m_previewWidget->setFixedSize(Theme::cutFacePreviewImageSize, Theme::cutFacePreviewImageSize);
+    m_previewWidget->enableMove(false);
+    m_previewWidget->enableZoom(false);
+
+    setFixedSize(Theme::cutFacePreviewImageSize, CutFaceWidget::preferredHeight());
+
+    connect(document, &Document::partPreviewChanged, this, &CutFaceWidget::updatePreview);
+}
+
+void CutFaceWidget::resizeEvent(QResizeEvent *event)
+{
+    QWidget::resizeEvent(event);
+    m_previewWidget->move((width() - Theme::cutFacePreviewImageSize) / 2, 0);
+}
+
+int CutFaceWidget::preferredHeight()
+{
+    return Theme::cutFacePreviewImageSize;
+}
+
+void CutFaceWidget::reload()
+{
+    updatePreview(m_partId);
+}
+
+void CutFaceWidget::updatePreview(QUuid partId)
+{
+    if (partId != m_partId)
+        return;
+    const SkeletonPart *part = m_document->findPart(m_partId);
+    if (!part) {
+        qDebug() << "Part not found:" << m_partId;
+        return;
+    }
+    MeshLoader *previewMesh = part->takePreviewMesh();
+    m_previewWidget->updateMesh(previewMesh);
+}
+
+void CutFaceWidget::updateCheckedState(bool checked)
+{
+    if (checked)
+        setStyleSheet("#CutFaceFrame {border: 1px solid " + Theme::red.name() + ";}");
+    else
+        setStyleSheet("#CutFaceFrame {border: 1px solid transparent;}");
+}
+
+ModelWidget *CutFaceWidget::previewWidget()
+{
+    return m_previewWidget;
+}

src/cutfacewidget.h

@@ -0,0 +1,28 @@
+#ifndef DUST3D_CUT_FACE_WIDGET_H
+#define DUST3D_CUT_FACE_WIDGET_H
+#include <QFrame>
+#include <QLabel>
+#include <QIcon>
+#include "document.h"
+#include "modelwidget.h"
+
+class CutFaceWidget : public QFrame
+{
+    Q_OBJECT
+public:
+    CutFaceWidget(const Document *document, QUuid partId);
+    static int preferredHeight();
+    ModelWidget *previewWidget();
+protected:
+    void resizeEvent(QResizeEvent *event) override;
+public slots:
+    void reload();
+    void updatePreview(QUuid partId);
+    void updateCheckedState(bool checked);
+private:
+    QUuid m_partId;
+    const Document *m_document = nullptr;
+    ModelWidget *m_previewWidget = nullptr;
+};
+
+#endif

src/document.cpp

@@ -147,6 +147,7 @@ void Document::removeEdge(QUuid edgeId)
     QUuid oldPartId = oldPart->id;
     std::vector<std::vector<QUuid>> groups;
     splitPartByEdge(&groups, edgeId);
+    std::vector<std::pair<QUuid, size_t>> newPartNodeNumMap;
     for (auto groupIt = groups.begin(); groupIt != groups.end(); groupIt++) {
         const auto newUuid = QUuid::createUuid();
         SkeletonPart &part = partMap[newUuid];
@@ -171,6 +172,7 @@ void Document::removeEdge(QUuid edgeId)
             }
         }
         addPartToComponent(part.id, findComponentParentId(part.componentId));
+        newPartNodeNumMap.push_back({part.id, part.nodeIds.size()});
         emit partAdded(part.id);
     }
     for (auto nodeIdIt = edge->nodeIds.begin(); nodeIdIt != edge->nodeIds.end(); nodeIdIt++) {
@@ -186,6 +188,14 @@ void Document::removeEdge(QUuid edgeId)
     emit edgeRemoved(edgeId);
     removePart(oldPartId);
     
+    if (!newPartNodeNumMap.empty()) {
+        std::sort(newPartNodeNumMap.begin(), newPartNodeNumMap.end(), [&](
+                const std::pair<QUuid, size_t> &first, const std::pair<QUuid, size_t> &second) {
+            return first.second > second.second;
+        });
+        updateLinkedPart(oldPartId, newPartNodeNumMap[0].first);
+    }
+    
     emit skeletonChanged();
 }
 
@@ -207,6 +217,7 @@ void Document::removeNode(QUuid nodeId)
     QUuid oldPartId = oldPart->id;
     std::vector<std::vector<QUuid>> groups;
     splitPartByNode(&groups, nodeId);
+    std::vector<std::pair<QUuid, size_t>> newPartNodeNumMap;
     for (auto groupIt = groups.begin(); groupIt != groups.end(); groupIt++) {
         const auto newUuid = QUuid::createUuid();
         SkeletonPart &part = partMap[newUuid];
@@ -231,6 +242,7 @@ void Document::removeNode(QUuid nodeId)
             }
         }
         addPartToComponent(part.id, findComponentParentId(part.componentId));
+        newPartNodeNumMap.push_back({part.id, part.nodeIds.size()});
         emit partAdded(part.id);
     }
     for (auto edgeIdIt = node->edgeIds.begin(); edgeIdIt != node->edgeIds.end(); edgeIdIt++) {
@@ -253,6 +265,14 @@ void Document::removeNode(QUuid nodeId)
     emit nodeRemoved(nodeId);
     removePart(oldPartId);
     
+    if (!newPartNodeNumMap.empty()) {
+        std::sort(newPartNodeNumMap.begin(), newPartNodeNumMap.end(), [&](
+                const std::pair<QUuid, size_t> &first, const std::pair<QUuid, size_t> &second) {
+            return first.second > second.second;
+        });
+        updateLinkedPart(oldPartId, newPartNodeNumMap[0].first);
+    }
+    
     emit skeletonChanged();
 }
 
@@ -543,12 +563,23 @@ void Document::addEdge(QUuid fromNodeId, QUuid toNodeId)
     emit edgeAdded(edge.id);
     
     if (toPartRemoved) {
+        updateLinkedPart(toPartId, fromNode->partId);
         removePart(toPartId);
     }
     
     emit skeletonChanged();
 }
 
+void Document::updateLinkedPart(QUuid oldPartId, QUuid newPartId)
+{
+    for (auto &partIt: partMap) {
+        if (partIt.second.cutFaceLinkedId == oldPartId) {
+            partIt.second.dirty = true;
+            partIt.second.setCutFaceLinkedId(newPartId);
+        }
+    }
+}
+
 const Component *Document::findComponent(QUuid componentId) const
 {
     if (componentId.isNull())
@@ -865,10 +896,19 @@ void Document::toSnapshot(Snapshot *snapshot, const std::set<QUuid> &limitNodeId
             part["zMirrored"] = partIt.second.zMirrored ? "true" : "false";
             part["rounded"] = partIt.second.rounded ? "true" : "false";
             part["chamfered"] = partIt.second.chamfered ? "true" : "false";
+            if (PartTarget::Model != partIt.second.target)
+                part["target"] = PartTargetToString(partIt.second.target);
             if (partIt.second.cutRotationAdjusted())
                 part["cutRotation"] = QString::number(partIt.second.cutRotation);
-            if (partIt.second.cutFaceAdjusted())
+            if (partIt.second.cutFaceAdjusted()) {
-                part["cutFace"] = CutFaceToString(partIt.second.cutFace);
+                if (CutFace::UserDefined == partIt.second.cutFace) {
+                    if (!partIt.second.cutFaceLinkedId.isNull()) {
+                        part["cutFace"] = partIt.second.cutFaceLinkedId.toString();
+                    }
+                } else {
+                    part["cutFace"] = CutFaceToString(partIt.second.cutFace);
+                }
+            }
             part["dirty"] = partIt.second.dirty ? "true" : "false";
             if (partIt.second.hasColor)
                 part["color"] = partIt.second.color.name();
@@ -1110,6 +1150,7 @@ void Document::addFromSnapshot(const Snapshot &snapshot, bool fromPaste)
         materialIdList.push_back(newMaterialId);
         emit materialAdded(newMaterialId);
     }
+    std::map<QUuid, QUuid> cutFaceLinkedIdModifyMap;
     for (const auto &partKv: snapshot.parts) {
         const auto newUuid = QUuid::createUuid();
         SkeletonPart &part = partMap[newUuid];
@@ -1124,12 +1165,20 @@ void Document::addFromSnapshot(const Snapshot &snapshot, bool fromPaste)
         part.zMirrored = isTrueValueString(valueOfKeyInMapOrEmpty(partKv.second, "zMirrored"));
         part.rounded = isTrueValueString(valueOfKeyInMapOrEmpty(partKv.second, "rounded"));
         part.chamfered = isTrueValueString(valueOfKeyInMapOrEmpty(partKv.second, "chamfered"));
+        part.target = PartTargetFromString(valueOfKeyInMapOrEmpty(partKv.second, "target").toUtf8().constData());
         const auto &cutRotationIt = partKv.second.find("cutRotation");
         if (cutRotationIt != partKv.second.end())
             part.setCutRotation(cutRotationIt->second.toFloat());
         const auto &cutFaceIt = partKv.second.find("cutFace");
-        if (cutFaceIt != partKv.second.end())
+        if (cutFaceIt != partKv.second.end()) {
-            part.setCutFace(CutFaceFromString(cutFaceIt->second.toUtf8().constData()));
+            QUuid cutFaceLinkedId = QUuid(cutFaceIt->second);
+            if (cutFaceLinkedId.isNull()) {
+                part.setCutFace(CutFaceFromString(cutFaceIt->second.toUtf8().constData()));
+            } else {
+                part.setCutFaceLinkedId(cutFaceLinkedId);
+                cutFaceLinkedIdModifyMap.insert({part.id, cutFaceLinkedId});
+            }
+        }
         if (isTrueValueString(valueOfKeyInMapOrEmpty(partKv.second, "inverse")))
             inversePartIds.insert(part.id);
         const auto &colorIt = partKv.second.find("color");
@@ -1148,6 +1197,14 @@ void Document::addFromSnapshot(const Snapshot &snapshot, bool fromPaste)
             part.materialId = oldNewIdMap[QUuid(materialIdIt->second)];
         newAddedPartIds.insert(part.id);
     }
+    for (const auto &it: cutFaceLinkedIdModifyMap) {
+        SkeletonPart &part = partMap[it.first];
+        auto findNewLinkedId = oldNewIdMap.find(it.second);
+        if (findNewLinkedId == oldNewIdMap.end())
+            part.setCutFaceLinkedId(QUuid());
+        else
+            part.setCutFaceLinkedId(findNewLinkedId->second);
+    }
     for (const auto &nodeKv: snapshot.nodes) {
         if (nodeKv.second.find("radius") == nodeKv.second.end() ||
                 nodeKv.second.find("x") == nodeKv.second.end() ||
@@ -2220,6 +2277,21 @@ void Document::setPartChamferState(QUuid partId, bool chamfered)
     emit skeletonChanged();
 }
 
+void Document::setPartTarget(QUuid partId, PartTarget target)
+{
+    auto part = partMap.find(partId);
+    if (part == partMap.end()) {
+        qDebug() << "Part not found:" << partId;
+        return;
+    }
+    if (part->second.target == target)
+        return;
+    part->second.target = target;
+    part->second.dirty = true;
+    emit partTargetChanged(partId);
+    emit skeletonChanged();
+}
+
 void Document::setPartCutRotation(QUuid partId, float cutRotation)
 {
     auto part = partMap.find(partId);
@@ -2250,6 +2322,22 @@ void Document::setPartCutFace(QUuid partId, CutFace cutFace)
     emit skeletonChanged();
 }
 
+void Document::setPartCutFaceLinkedId(QUuid partId, QUuid linkedId)
+{
+    auto part = partMap.find(partId);
+    if (part == partMap.end()) {
+        qDebug() << "Part not found:" << partId;
+        return;
+    }
+    if (part->second.cutFace == CutFace::UserDefined &&
+            part->second.cutFaceLinkedId == linkedId)
+        return;
+    part->second.setCutFaceLinkedId(linkedId);
+    part->second.dirty = true;
+    emit partCutFaceChanged(partId);
+    emit skeletonChanged();
+}
+
 void Document::setPartColorState(QUuid partId, bool hasColor, QColor color)
 {
     auto part = partMap.find(partId);

src/document.h

@@ -404,6 +404,7 @@ signals:
     void partCutFaceChanged(QUuid partId);
     void partMaterialIdChanged(QUuid partId);
     void partChamferStateChanged(QUuid partId);
+    void partTargetChanged(QUuid partId);
     void componentCombineModeChanged(QUuid componentId);
     void cleanup();
     void originChanged();
@@ -558,8 +559,10 @@ public slots:
     void setPartColorState(QUuid partId, bool hasColor, QColor color);
     void setPartCutRotation(QUuid partId, float cutRotation);
     void setPartCutFace(QUuid partId, CutFace cutFace);
+    void setPartCutFaceLinkedId(QUuid partId, QUuid linkedId);
     void setPartMaterialId(QUuid partId, QUuid materialId);
     void setPartChamferState(QUuid partId, bool chamfered);
+    void setPartTarget(QUuid partId, PartTarget target);
     void setComponentCombineMode(QUuid componentId, CombineMode combineMode);
     void moveComponentUp(QUuid componentId);
     void moveComponentDown(QUuid componentId);
@@ -632,6 +635,7 @@ private:
     void resetDirtyFlags();
     void markAllDirty();
     void removeRigResults();
+    void updateLinkedPart(QUuid oldPartId, QUuid newPartId);
 private: // need initialize
     bool m_isResultMeshObsolete;
     MeshGenerator *m_meshGenerator;

src/documentwindow.cpp

@@ -831,6 +831,7 @@ DocumentWindow::DocumentWindow() :
     connect(partTreeWidget, &PartTreeWidget::setPartLockState, m_document, &Document::setPartLockState);
     connect(partTreeWidget, &PartTreeWidget::setPartVisibleState, m_document, &Document::setPartVisibleState);
     connect(partTreeWidget, &PartTreeWidget::setComponentCombineMode, m_document, &Document::setComponentCombineMode);
+    connect(partTreeWidget, &PartTreeWidget::setPartTarget, m_document, &Document::setPartTarget);
     connect(partTreeWidget, &PartTreeWidget::hideDescendantComponents, m_document, &Document::hideDescendantComponents);
     connect(partTreeWidget, &PartTreeWidget::showDescendantComponents, m_document, &Document::showDescendantComponents);
     connect(partTreeWidget, &PartTreeWidget::lockDescendantComponents, m_document, &Document::lockDescendantComponents);

src/materialwidget.cpp

@@ -63,12 +63,14 @@ int MaterialWidget::preferredHeight()
 
 void MaterialWidget::reload()
 {
-    updatePreview();
+    updatePreview(m_materialId);
-    updateName();
+    updateName(m_materialId);
 }
 
-void MaterialWidget::updatePreview()
+void MaterialWidget::updatePreview(QUuid materialId)
 {
+    if (materialId != m_materialId)
+        return;
     const Material *material = m_document->findMaterial(m_materialId);
     if (!material) {
         qDebug() << "Material not found:" << m_materialId;
@@ -78,8 +80,10 @@ void MaterialWidget::updatePreview()
     m_previewWidget->updateMesh(previewMesh);
 }
 
-void MaterialWidget::updateName()
+void MaterialWidget::updateName(QUuid materialId)
 {
+    if (materialId != m_materialId)
+        return;
     const Material *material = m_document->findMaterial(m_materialId);
     if (!material) {
         qDebug() << "Material not found:" << m_materialId;

src/materialwidget.h

@@ -21,8 +21,8 @@ protected:
     void resizeEvent(QResizeEvent *event) override;
 public slots:
     void reload();
-    void updatePreview();
+    void updatePreview(QUuid materialId);
-    void updateName();
+    void updateName(QUuid materialId);
     void updateCheckedState(bool checked);
     void setCornerButtonVisible(bool visible);
 private:

src/meshgenerator.cpp

@@ -11,6 +11,8 @@
 #include "util.h"
 #include "trianglesourcenoderesolve.h"
 #include "cutface.h"
+#include "parttarget.h"
+#include "theme.h"
 
 MeshGenerator::MeshGenerator(Snapshot *snapshot) :
     m_snapshot(snapshot)
@@ -83,6 +85,20 @@ bool MeshGenerator::checkIsPartDirty(const QString &partIdString)
     return isTrueValueString(valueOfKeyInMapOrEmpty(findPart->second, "dirty"));
 }
 
+bool MeshGenerator::checkIsPartDependencyDirty(const QString &partIdString)
+{
+    auto findPart = m_snapshot->parts.find(partIdString);
+    if (findPart == m_snapshot->parts.end()) {
+        qDebug() << "Find part failed:" << partIdString;
+        return false;
+    }
+    QString cutFaceString = valueOfKeyInMapOrEmpty(findPart->second, "cutFace");
+    QUuid cutFaceLinkedPartId = QUuid(cutFaceString);
+    if (cutFaceLinkedPartId.isNull())
+        return false;
+    return checkIsPartDirty(cutFaceString);
+}
+
 bool MeshGenerator::checkIsComponentDirty(const QString &componentIdString)
 {
     bool isDirty = false;
@@ -108,6 +124,11 @@ bool MeshGenerator::checkIsComponentDirty(const QString &componentIdString)
             m_dirtyPartIds.insert(partId);
             isDirty = true;
         }
+        if (!isDirty) {
+            if (checkIsPartDependencyDirty(partId)) {
+                isDirty = true;
+            }
+        }
     }
     
     for (const auto &childId: valueOfKeyInMapOrEmpty(*component, "children").split(",")) {
@@ -149,12 +170,122 @@ nodemesh::Combiner::Mesh *MeshGenerator::combinePartMesh(const QString &partIdSt
     float deformThickness = 1.0;
     float deformWidth = 1.0;
     float cutRotation = 0.0;
+    auto target = PartTargetFromString(valueOfKeyInMapOrEmpty(part, "target").toUtf8().constData());
     
-    CutFace cutFace = CutFaceFromString(valueOfKeyInMapOrEmpty(part, "cutFace").toUtf8().constData());
+    std::vector<QVector2D> cutTemplate;
-    std::vector<QVector2D> cutTemplate = CutFaceToPoints(cutFace);
+    QString cutFaceString = valueOfKeyInMapOrEmpty(part, "cutFace");
+    QUuid cutFaceLinkedPartId = QUuid(cutFaceString);
+    if (!cutFaceLinkedPartId.isNull()) {
+        auto findCutFaceLinkedPart = m_snapshot->parts.find(cutFaceString);
+        if (findCutFaceLinkedPart == m_snapshot->parts.end()) {
+            qDebug() << "Find cut face linked part failed:" << cutFaceString;
+        } else {
+            // Build node info map
+            std::map<QString, std::tuple<float, float, float>> cutFaceNodeMap;
+            for (const auto &nodeIdString: m_partNodeIds[cutFaceString]) {
+                auto findNode = m_snapshot->nodes.find(nodeIdString);
+                if (findNode == m_snapshot->nodes.end()) {
+                    qDebug() << "Find node failed:" << nodeIdString;
+                    continue;
+                }
+                auto &node = findNode->second;
+                float radius = valueOfKeyInMapOrEmpty(node, "radius").toFloat();
+                float x = (valueOfKeyInMapOrEmpty(node, "x").toFloat() - m_mainProfileMiddleX);
+                float y = (m_mainProfileMiddleY - valueOfKeyInMapOrEmpty(node, "y").toFloat());
+                cutFaceNodeMap.insert({nodeIdString, {radius, x, y}});
+            }
+            // Build edge link
+            std::map<QString, std::vector<QString>> cutFaceNodeLinkMap;
+            for (const auto &edgeIdString: m_partEdgeIds[cutFaceString]) {
+                auto findEdge = m_snapshot->edges.find(edgeIdString);
+                if (findEdge == m_snapshot->edges.end()) {
+                    qDebug() << "Find edge failed:" << edgeIdString;
+                    continue;
+                }
+                auto &edge = findEdge->second;
+                QString fromNodeIdString = valueOfKeyInMapOrEmpty(edge, "from");
+                QString toNodeIdString = valueOfKeyInMapOrEmpty(edge, "to");
+                cutFaceNodeLinkMap[fromNodeIdString].push_back(toNodeIdString);
+                cutFaceNodeLinkMap[toNodeIdString].push_back(fromNodeIdString);
+            }
+            // Find endpoint
+            QString endPointNodeIdString;
+            std::vector<std::pair<QString, std::tuple<float, float, float>>> endpointNodes;
+            for (const auto &it: cutFaceNodeLinkMap) {
+                if (1 == it.second.size()) {
+                    const auto &findNode = cutFaceNodeMap.find(it.first);
+                    if (findNode != cutFaceNodeMap.end())
+                        endpointNodes.push_back({it.first, findNode->second});
+                }
+            }
+            if (!endpointNodes.empty()) {
+                std::sort(endpointNodes.begin(), endpointNodes.end(), [](
+                        const std::pair<QString, std::tuple<float, float, float>> &first,
+                        const std::pair<QString, std::tuple<float, float, float>> &second) {
+                    const auto &firstX = std::get<1>(first.second);
+                    const auto &secondX = std::get<1>(second.second);
+                    if (firstX < secondX) {
+                        return true;
+                    } else if (firstX > secondX) {
+                        return false;
+                    } else {
+                        const auto &firstY = std::get<2>(first.second);
+                        const auto &secondY = std::get<2>(second.second);
+                        if (firstY > secondY) {
+                            return true;
+                        } else if (firstY < secondY) {
+                            return false;
+                        } else {
+                            const auto &firstRadius = std::get<0>(first.second);
+                            const auto &secondRadius = std::get<0>(second.second);
+                            if (firstRadius < secondRadius) {
+                                return true;
+                            } else if (firstRadius > secondRadius) {
+                                return false;
+                            } else {
+                                return true;
+                            }
+                        }
+                    }
+                });
+                endPointNodeIdString = endpointNodes[0].first;
+            }
+            // Loop all linked nodes
+            std::vector<std::tuple<float, float, float>> cutFaceNodes;
+            std::set<QString> cutFaceVisitedNodeIds;
+            std::function<void (const QString &)> loopNodeLink;
+            loopNodeLink = [&](const QString &fromNodeIdString) {
+                auto findCutFaceNode = cutFaceNodeMap.find(fromNodeIdString);
+                if (findCutFaceNode == cutFaceNodeMap.end())
+                    return;
+                if (cutFaceVisitedNodeIds.find(fromNodeIdString) != cutFaceVisitedNodeIds.end())
+                    return;
+                cutFaceVisitedNodeIds.insert(fromNodeIdString);
+                cutFaceNodes.push_back(findCutFaceNode->second);
+                auto findNeighbor = cutFaceNodeLinkMap.find(fromNodeIdString);
+                if (findNeighbor == cutFaceNodeLinkMap.end())
+                    return;
+                for (const auto &it: findNeighbor->second) {
+                    if (cutFaceVisitedNodeIds.find(it) == cutFaceVisitedNodeIds.end()) {
+                        loopNodeLink(it);
+                        break;
+                    }
+                }
+            };
+            if (!endPointNodeIdString.isEmpty()) {
+                loopNodeLink(endPointNodeIdString);
+            }
+            // Fetch points from linked nodes
+            cutFacePointsFromNodes(cutTemplate, cutFaceNodes);
+        }
+    }
+    if (cutTemplate.size() < 3) {
+        CutFace cutFace = CutFaceFromString(cutFaceString.toUtf8().constData());
+        cutTemplate = CutFaceToPoints(cutFace);
+    }
     if (chamfered)
         nodemesh::chamferFace2D(&cutTemplate);
-    //normalizeCutFacePoints(&cutTemplate);
+    
     QString cutRotationString = valueOfKeyInMapOrEmpty(part, "cutRotation");
     if (!cutRotationString.isEmpty()) {
         cutRotation = cutRotationString.toFloat();
@@ -327,6 +458,7 @@ nodemesh::Combiner::Mesh *MeshGenerator::combinePartMesh(const QString &partIdSt
         partCache.outcomeNodeVertices.push_back({position, {partIdString, nodeIdString}});
     }
     
+    bool hasMeshError = false;
     nodemesh::Combiner::Mesh *mesh = nullptr;
     
     if (buildSucceed) {
@@ -360,17 +492,17 @@ nodemesh::Combiner::Mesh *MeshGenerator::combinePartMesh(const QString &partIdSt
                     delete mesh;
                     mesh = newMesh;
                 } else {
-                    m_isSucceed = false;
+                    hasMeshError = true;
                     qDebug() << "Xmirrored mesh generate failed";
                     delete newMesh;
                 }
             }
         } else {
-            m_isSucceed = false;
+            hasMeshError = true;
             qDebug() << "Mesh built is uncombinable";
         }
     } else {
-        m_isSucceed = false;
+        hasMeshError = true;
         qDebug() << "Mesh build failed";
     }
     
@@ -392,6 +524,9 @@ nodemesh::Combiner::Mesh *MeshGenerator::combinePartMesh(const QString &partIdSt
     }
     
     nodemesh::trim(&partPreviewVertices, true);
+    for (auto &it: partPreviewVertices) {
+        it *= 2.0;
+    }
     std::vector<QVector3D> partPreviewTriangleNormals;
     for (const auto &face: partCache.previewTriangles) {
         partPreviewTriangleNormals.push_back(QVector3D::normal(
@@ -406,6 +541,8 @@ nodemesh::Combiner::Mesh *MeshGenerator::combinePartMesh(const QString &partIdSt
         partPreviewTriangleNormals,
         &partPreviewTriangleVertexNormals);
     if (!partCache.previewTriangles.empty()) {
+        if (target == PartTarget::CutFace)
+            partPreviewColor = Theme::red;
         m_partPreviewMeshes[partId] = new MeshLoader(partPreviewVertices,
             partCache.previewTriangles,
             partPreviewTriangleVertexNormals,
@@ -425,6 +562,15 @@ nodemesh::Combiner::Mesh *MeshGenerator::combinePartMesh(const QString &partIdSt
         mesh = nullptr;
     }
     
+    if (target != PartTarget::Model) {
+        delete mesh;
+        mesh = nullptr;
+    }
+    
+    if (hasMeshError && target == PartTarget::Model) {
+        m_isSucceed = false;
+    }
+    
     return mesh;
 }
 
@@ -620,12 +766,10 @@ nodemesh::Combiner::Mesh *MeshGenerator::combineMultipleMeshes(const std::vector
         nodemesh::Combiner::Mesh *subMesh = it.first;
         qDebug() << "Combine mode:" << CombineModeToString(childCombineMode);
         if (nullptr == subMesh) {
-            m_isSucceed = false;
             qDebug() << "Child mesh is null";
             continue;
         }
         if (subMesh->isNull()) {
-            m_isSucceed = false;
             qDebug() << "Child mesh is uncombinable";
             delete subMesh;
             continue;
@@ -906,7 +1050,6 @@ void MeshGenerator::collectUncombinedComponent(const QString &componentIdString)
         const auto &componentCache = m_cacheContext->components[componentIdString];
         if (nullptr == componentCache.mesh || componentCache.mesh->isNull()) {
             qDebug() << "Uncombined mesh is null";
-            m_isSucceed = false;
             return;
         }
         

src/meshgenerator.h

@@ -87,6 +87,7 @@ private:
     void collectParts();
     bool checkIsComponentDirty(const QString &componentIdString);
     bool checkIsPartDirty(const QString &partIdString);
+    bool checkIsPartDependencyDirty(const QString &partIdString);
     void checkDirtyFlags();
     nodemesh::Combiner::Mesh *combinePartMesh(const QString &partIdString);
     nodemesh::Combiner::Mesh *combineComponentMesh(const QString &componentIdString, CombineMode *combineMode);

src/modelwidget.cpp

@@ -35,6 +35,7 @@ ModelWidget::ModelWidget(QWidget *parent) :
         setFormat(fmt);
     }
     setContextMenuPolicy(Qt::CustomContextMenu);
+    zoom(200);
 }
 
 int ModelWidget::xRot()
@@ -128,7 +129,7 @@ void ModelWidget::initializeGL()
     // Our camera never changes in this example.
     m_camera.setToIdentity();
     // FIXME: if change here, please also change the camera pos in PBR shader
-    m_camera.translate(0, 0, -2.1);
+    m_camera.translate(0, 0, -4.0);
 
     // Light position is fixed.
     // FIXME: PBR render no longer use this parameter

src/parttarget.cpp

@@ -0,0 +1,5 @@
+#include "parttarget.h"
+
+IMPL_PartTargetFromString
+IMPL_PartTargetToString
+IMPL_PartTargetToDispName

src/parttarget.h

@@ -0,0 +1,50 @@
+#ifndef DUST3D_PART_TARGET_H
+#define DUST3D_PART_TARGET_H
+#include <QString>
+#include <QObject>
+
+enum class PartTarget
+{
+    Model = 0,
+    CutFace,
+    Count
+};
+PartTarget PartTargetFromString(const char *targetString);
+#define IMPL_PartTargetFromString                                               \
+PartTarget PartTargetFromString(const char *targetString)                       \
+{                                                                               \
+    QString target = targetString;                                              \
+    if (target == "Model")                                                      \
+        return PartTarget::Model;                                               \
+    if (target == "CutFace")                                                    \
+        return PartTarget::CutFace;                                             \
+    return PartTarget::Model;                                                   \
+}
+const char *PartTargetToString(PartTarget target);
+#define IMPL_PartTargetToString                                                 \
+const char *PartTargetToString(PartTarget target)                               \
+{                                                                               \
+    switch (target) {                                                           \
+        case PartTarget::Model:                                                 \
+            return "Model";                                                     \
+        case PartTarget::CutFace:                                               \
+            return "CutFace";                                                   \
+        default:                                                                \
+            return "Model";                                                     \
+    }                                                                           \
+}
+QString PartTargetToDispName(PartTarget target);
+#define IMPL_PartTargetToDispName                                               \
+QString PartTargetToDispName(PartTarget target)                                 \
+{                                                                               \
+    switch (target) {                                                           \
+        case PartTarget::Model:                                                 \
+            return QObject::tr("Model");                                        \
+        case PartTarget::CutFace:                                               \
+            return QObject::tr("Cut Face");                                     \
+        default:                                                                \
+            return QObject::tr("Model");                                        \
+    }                                                                           \
+}
+
+#endif

src/parttreewidget.cpp

@@ -7,6 +7,7 @@
 #include <QBrush>
 #include <QGuiApplication>
 #include <QComboBox>
+#include <QFormLayout>
 #include "parttreewidget.h"
 #include "partwidget.h"
 #include "skeletongraphicswidget.h"
@@ -276,20 +277,37 @@ void PartTreeWidget::showContextMenu(const QPoint &pos)
             combineModeSelectBox->addItem(CombineModeToDispName(mode));
         }
         combineModeSelectBox->setCurrentIndex((int)component->combineMode);
-        
         connect(combineModeSelectBox, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, [=](int index) {
             emit setComponentCombineMode(component->id, (CombineMode)index);
         });
         
-        QHBoxLayout *combineModeLayout = new QHBoxLayout;
+        QComboBox *partTargetSelectBox = nullptr;
-        combineModeLayout->setAlignment(Qt::AlignCenter);
+        if (nullptr != part && nullptr != partWidget) {
-        combineModeLayout->setContentsMargins(0, 0, 0, 0);
+            partTargetSelectBox = new QComboBox;
-        combineModeLayout->setSpacing(0);
+            for (size_t i = 0; i < (size_t)PartTarget::Count; ++i) {
-        combineModeLayout->addWidget(combineModeSelectBox);
+                PartTarget target = (PartTarget)i;
+                partTargetSelectBox->addItem(PartTargetToDispName(target));
+            }
+            partTargetSelectBox->setCurrentIndex((int)part->target);
+            connect(partTargetSelectBox, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, [=](int index) {
+                emit setPartTarget(part->id, (PartTarget)index);
+            });
+        }
+        
+        //QHBoxLayout *combineModeLayout = new QHBoxLayout;
+        //combineModeLayout->setAlignment(Qt::AlignCenter);
+        //combineModeLayout->setContentsMargins(0, 0, 0, 0);
+        //combineModeLayout->setSpacing(0);
+        //combineModeLayout->addWidget(combineModeSelectBox);
+        
+        QFormLayout *componentSettingsLayout = new QFormLayout;
+        if (nullptr != partTargetSelectBox)
+            componentSettingsLayout->addRow(tr("Target"), partTargetSelectBox);
+        componentSettingsLayout->addRow(tr("Mode"), combineModeSelectBox);
     
         QVBoxLayout *newLayout = new QVBoxLayout;
         newLayout->addLayout(layout);
-        newLayout->addLayout(combineModeLayout);
+        newLayout->addLayout(componentSettingsLayout);
         widget->setLayout(newLayout);
     } else {
         widget->setLayout(layout);
@@ -687,6 +705,11 @@ void PartTreeWidget::componentCombineModeChanged(QUuid componentId)
     updateComponentAppearance(componentId);
 }
 
+void PartTreeWidget::componentTargetChanged(QUuid componentId)
+{
+    updateComponentAppearance(componentId);
+}
+
 void PartTreeWidget::addComponentChildrenToItem(QUuid componentId, QTreeWidgetItem *parentItem)
 {
     const Component *parentComponent = m_document->findComponent(componentId);

src/parttreewidget.h

@@ -21,6 +21,7 @@ signals:
     void setComponentExpandState(QUuid componentId, bool expanded);
     void setComponentSmoothAll(QUuid componentId, float toSmoothAll);
     void setComponentSmoothSeam(QUuid componentId, float toSmoothSeam);
+    void setPartTarget(QUuid partId, PartTarget target);
     void moveComponent(QUuid componentId, QUuid toParentId);
     void removeComponent(QUuid componentId);
     void hideOtherComponents(QUuid componentId);
@@ -50,6 +51,7 @@ public slots:
     void componentAdded(QUuid componentId);
     void componentExpandStateChanged(QUuid componentId);
     void componentCombineModeChanged(QUuid componentId);
+    void componentTargetChanged(QUuid componentId);
     void partRemoved(QUuid partId);
     void partPreviewChanged(QUuid partid);
     void partLockStateChanged(QUuid partId);

src/partwidget.cpp

@@ -18,6 +18,8 @@
 #include "skeletongraphicswidget.h"
 #include "shortcuts.h"
 #include "graphicscontainerwidget.h"
+#include "flowlayout.h"
+#include "cutfacelistwidget.h"
 
 PartWidget::PartWidget(const Document *document, QUuid partId) :
     m_document(document),
@@ -73,7 +75,7 @@ PartWidget::PartWidget(const Document *document, QUuid partId) :
     initButton(m_colorButton);
     
     m_cutRotationButton = new QPushButton;
-    m_cutRotationButton->setToolTip(tr("Cut rotation"));
+    m_cutRotationButton->setToolTip(tr("Cut face"));
     m_cutRotationButton->setSizePolicy(retainSizePolicy);
     initButton(m_cutRotationButton);
     
@@ -161,6 +163,7 @@ PartWidget::PartWidget(const Document *document, QUuid partId) :
     connect(this, &PartWidget::setPartChamferState, m_document, &Document::setPartChamferState);
     connect(this, &PartWidget::setPartCutRotation, m_document, &Document::setPartCutRotation);
     connect(this, &PartWidget::setPartCutFace, m_document, &Document::setPartCutFace);
+    connect(this, &PartWidget::setPartCutFaceLinkedId, m_document, &Document::setPartCutFaceLinkedId);
     connect(this, &PartWidget::setPartColorState, m_document, &Document::setPartColorState);
     connect(this, &PartWidget::setPartMaterialId, m_document, &Document::setPartMaterialId);
     connect(this, &PartWidget::checkPart, m_document, &Document::checkPart);
@@ -434,11 +437,16 @@ void PartWidget::showCutRotationSettingPopup(const QPoint &pos)
     rotationLayout->addWidget(rotationEraser);
     rotationLayout->addWidget(rotationWidget);
     
-    QHBoxLayout *facesLayout = new QHBoxLayout;
+    QHBoxLayout *standardFacesLayout = new QHBoxLayout;
     QPushButton *buttons[(int)CutFace::Count] = {0};
     
+    CutFaceListWidget *cutFaceListWidget = new CutFaceListWidget(m_document);
+    size_t cutFaceTypeCount = (size_t)CutFace::Count;
+    if (cutFaceListWidget->isEmpty())
+        cutFaceTypeCount = (size_t)CutFace::UserDefined;
+    
     auto updateCutFaceButtonState = [&](size_t index) {
-        for (size_t i = 0; i < (size_t)CutFace::Count; ++i) {
+        for (size_t i = 0; i < (size_t)cutFaceTypeCount; ++i) {
             auto button = buttons[i];
             if (i == index) {
                 button->setFlat(true);
@@ -448,8 +456,28 @@ void PartWidget::showCutRotationSettingPopup(const QPoint &pos)
                 button->setEnabled(true);
             }
         }
+        if (index != (int)CutFace::UserDefined)
+            cutFaceListWidget->selectCutFace(QUuid());
     };
-    for (size_t i = 0; i < (size_t)CutFace::Count; ++i) {
+    
+    cutFaceListWidget->enableMultipleSelection(false);
+    cutFaceListWidget->selectCutFace(part->cutFaceLinkedId);
+    connect(cutFaceListWidget, &CutFaceListWidget::currentSelectedCutFaceChanged, this, [=](QUuid partId) {
+        if (partId.isNull()) {
+            CutFace cutFace = CutFace::Quad;
+            updateCutFaceButtonState((int)cutFace);
+            emit setPartCutFace(m_partId, cutFace);
+            emit groupOperationAdded();
+        } else {
+            updateCutFaceButtonState((int)CutFace::UserDefined);
+            emit setPartCutFaceLinkedId(m_partId, partId);
+            emit groupOperationAdded();
+        }
+    });
+    if (cutFaceListWidget->isEmpty())
+        cutFaceListWidget->hide();
+    
+    for (size_t i = 0; i < (size_t)cutFaceTypeCount; ++i) {
         CutFace cutFace = (CutFace)i;
         QString iconFilename = ":/resources/" + CutFaceToString(cutFace).toLower() + ".png";
         QPixmap pixmap(iconFilename);
@@ -462,7 +490,7 @@ void PartWidget::showCutRotationSettingPopup(const QPoint &pos)
             emit setPartCutFace(m_partId, cutFace);
             emit groupOperationAdded();
         });
-        facesLayout->addWidget(button);
+        standardFacesLayout->addWidget(button);
         buttons[i] = button;
     }
     updateCutFaceButtonState((size_t)part->cutFace);
@@ -470,7 +498,8 @@ void PartWidget::showCutRotationSettingPopup(const QPoint &pos)
     QVBoxLayout *popupLayout = new QVBoxLayout;
     popupLayout->addLayout(rotationLayout);
     popupLayout->addSpacing(10);
-    popupLayout->addLayout(facesLayout);
+    popupLayout->addLayout(standardFacesLayout);
+    popupLayout->addWidget(cutFaceListWidget);
     
     popup->setLayout(popupLayout);
     

src/partwidget.h

@@ -23,6 +23,7 @@ signals:
     void setPartColorState(QUuid partId, bool hasColor, QColor color);
     void setPartCutRotation(QUuid partId, float cutRotation);
     void setPartCutFace(QUuid partId, CutFace cutFace);
+    void setPartCutFaceLinkedId(QUuid partId, QUuid linkedId);
     void setPartMaterialId(QUuid partId, QUuid materialId);
     void movePartUp(QUuid partId);
     void movePartDown(QUuid partId);

src/skeletondocument.h

@@ -10,6 +10,7 @@
 #include "theme.h"
 #include "meshloader.h"
 #include "cutface.h"
+#include "parttarget.h"
 
 class SkeletonNode
 {
@@ -87,7 +88,9 @@ public:
     bool dirty;
     float cutRotation;
     CutFace cutFace;
+    QUuid cutFaceLinkedId;
     QUuid materialId;
+    PartTarget target;
     SkeletonPart(const QUuid &withId=QUuid()) :
         visible(true),
         locked(false),
@@ -99,11 +102,12 @@ public:
         deformWidth(1.0),
         rounded(false),
         chamfered(false),
-        color(Theme::white),
+        color(Qt::white),
         hasColor(false),
         dirty(true),
         cutRotation(0.0),
-        cutFace(CutFace::Quad)
+        cutFace(CutFace::Quad),
+        target(PartTarget::Model)
     {
         id = withId.isNull() ? QUuid::createUuid() : withId;
     }
@@ -134,6 +138,16 @@ public:
     void setCutFace(CutFace face)
     {
         cutFace = face;
+        cutFaceLinkedId = QUuid();
+    }
+    void setCutFaceLinkedId(const QUuid &linkedId)
+    {
+        if (linkedId.isNull()) {
+            setCutFace(CutFace::Quad);
+            return;
+        }
+        cutFace = CutFace::UserDefined;
+        cutFaceLinkedId = linkedId;
     }
     bool deformThicknessAdjusted() const
     {
@@ -183,9 +197,11 @@ public:
         hasColor = other.hasColor;
         cutRotation = other.cutRotation;
         cutFace = other.cutFace;
+        cutFaceLinkedId = other.cutFaceLinkedId;
         componentId = other.componentId;
         dirty = other.dirty;
         materialId = other.materialId;
+        target = other.target;
     }
     void updatePreviewMesh(MeshLoader *previewMesh)
     {

src/theme.cpp

@@ -39,6 +39,7 @@ int Theme::miniIconFontSize = 0;
 int Theme::miniIconSize = 0;
 int Theme::partPreviewImageSize = 0;
 int Theme::materialPreviewImageSize = 0;
+int Theme::cutFacePreviewImageSize = 0;
 int Theme::posePreviewImageSize = 0;
 int Theme::motionPreviewImageSize = 0;
 int Theme::sidebarPreferredWidth = 0;
@@ -54,6 +55,7 @@ void Theme::initAwsomeBaseSizes()
     Theme::miniIconSize = (int)(Theme::miniIconFontSize * 1.67);
     Theme::partPreviewImageSize = (Theme::miniIconSize * 3);
     Theme::materialPreviewImageSize = 75;
+    Theme::cutFacePreviewImageSize = 75;
     Theme::posePreviewImageSize = 75;
     Theme::motionPreviewImageSize = 75;
     Theme::sidebarPreferredWidth = 200;

src/theme.h

@@ -35,6 +35,7 @@ public:
     static int toolIconFontSize;
     static int toolIconSize;
     static int materialPreviewImageSize;
+    static int cutFacePreviewImageSize;
     static int posePreviewImageSize;
     static int partPreviewImageSize;
     static int motionPreviewImageSize;

thirdparty/nodemesh/nodemesh/builder.cpp

@@ -616,7 +616,6 @@ void Builder::makeCut(const QVector3D &position,
         const QVector3D &traverseDirection,
         std::vector<QVector3D> &resultCut)
 {
-    baseNormal = revisedBaseNormalAcordingToCutNormal(baseNormal, cutNormal);
     auto finalCutTemplate = cutTemplate;
     auto finalCutNormal = cutNormal;
     float degree = 0;
@@ -624,14 +623,9 @@ void Builder::makeCut(const QVector3D &position,
         degree = m_cutRotation * 180;
     }
     if (QVector3D::dotProduct(cutNormal, traverseDirection) <= 0) {
-        baseNormal = -baseNormal;
         finalCutNormal = -finalCutNormal;
         std::reverse(finalCutTemplate.begin(), finalCutTemplate.end());
-        degree = ((int)degree + 180) % 360;
+        std::rotate(finalCutTemplate.begin(), finalCutTemplate.begin() + finalCutTemplate.size() - 1, finalCutTemplate.end());
-        //for (auto &it: finalCutTemplate) {
-        //    it.setX(-it.x());
-        //    it.setY(-it.y());
-        //}
     }
     QVector3D u = QVector3D::crossProduct(finalCutNormal, baseNormal).normalized();
     QVector3D v = QVector3D::crossProduct(u, finalCutNormal).normalized();