diff --git a/dust3d.pro b/dust3d.pro
index 0e3ddfe4..b3d99e27 100644
--- a/dust3d.pro
+++ b/dust3d.pro
@@ -439,12 +439,6 @@ HEADERS += src/triangulatefaces.h
 SOURCES += src/booleanmesh.cpp
 HEADERS += src/booleanmesh.h
 
-SOURCES += src/imageskeletonextractor.cpp
-HEADERS += src/imageskeletonextractor.h
-
-SOURCES += src/contourtopartconverter.cpp
-HEADERS += src/contourtopartconverter.h
-
 SOURCES += src/remesher.cpp
 HEADERS += src/remesher.h
 
diff --git a/src/contourtopartconverter.cpp b/src/contourtopartconverter.cpp
deleted file mode 100644
index 9ddeb977..00000000
--- a/src/contourtopartconverter.cpp
+++ /dev/null
@@ -1,297 +0,0 @@
-#include <QImage>
-#include <QPainter>
-#include <QPainterPath>
-#include <cmath>
-#include <QUuid>
-#include <cmath>
-#include <QTransform>
-#include <QGuiApplication>
-#include "contourtopartconverter.h"
-#include "imageskeletonextractor.h"
-#include "util.h"
-
-const float ContourToPartConverter::m_targetImageHeight = 64.0f;
-const float ContourToPartConverter::m_minEdgeLength = 0.025;
-const float ContourToPartConverter::m_radiusEpsilon = 0.0025;
-
-ContourToPartConverter::ContourToPartConverter(const QPolygonF &mainProfile,
-        const QPolygonF &sideProfile, const QSizeF &canvasSize) :
-    m_mainProfile(mainProfile),
-    m_sideProfile(sideProfile),
-    m_canvasSize(canvasSize)
-{
-}
-
-void ContourToPartConverter::process()
-{
-    convert();
-    emit finished();
-}
-
-const Snapshot &ContourToPartConverter::getSnapshot()
-{
-    return m_snapshot;
-}
-
-void ContourToPartConverter::extractSkeleton(const QPolygonF &polygon,
-        std::vector<std::pair<QVector2D, float>> *skeleton)
-{
-    auto originalBoundingBox = polygon.boundingRect();
-    QPointF polygonTopLeft = originalBoundingBox.topLeft();
-    
-    float scaleFactor = m_targetImageHeight / originalBoundingBox.height();
-    
-    QTransform transform;
-    transform = transform.scale(scaleFactor, scaleFactor);
-    QPolygonF scaledPolygon = transform.map(polygon);
-    
-    QRectF boundingBox = scaledPolygon.boundingRect();
-    QImage *image = new QImage(boundingBox.width() + 4, boundingBox.height() + 4, QImage::Format_Grayscale8);
-    image->fill(QColor(255, 255, 255));
-    
-    qreal offsetX = 1 - boundingBox.left();
-    qreal offsetY = 1 - boundingBox.top();
-    
-    QPainterPath path;
-    path.addPolygon(scaledPolygon.translated(offsetX, offsetY));
-    
-    QPainter painter;
-    painter.begin(image);
-    painter.setPen(Qt::PenStyle::NoPen);
-    painter.fillPath(path, Qt::black);
-    painter.end();
-    
-    ImageSkeletonExtractor imageSkeletonExtractor;
-    imageSkeletonExtractor.setImage(image);
-    imageSkeletonExtractor.extract();
-    
-    std::vector<std::pair<int, int>> imageSkeleton;
-    int imageArea = imageSkeletonExtractor.getArea();
-    imageSkeletonExtractor.getSkeleton(&imageSkeleton);
-    const std::set<std::pair<int, int>> &blackPixels = imageSkeletonExtractor.getBlackPixels();
-    
-    std::vector<std::pair<int, int>> selectedNodes;
-    if (imageSkeleton.size() >= 2) {
-        int targetLength = std::ceil(0.5 * (float)imageArea / imageSkeleton.size());
-        int minLength = m_minEdgeLength * imageSkeleton.size();
-        if (targetLength < minLength)
-            targetLength = minLength;
-        size_t newInsertNum = imageSkeleton.size() / targetLength;
-        if (newInsertNum < 1)
-            newInsertNum = 1;
-        if (newInsertNum > 100)
-            newInsertNum = 100;
-        float stepFactor = 1.0 / (newInsertNum + 1);
-        float factor = stepFactor;
-        selectedNodes.push_back(imageSkeleton[0]);
-        for (size_t i = 0; i < newInsertNum && factor < 1.0; factor += stepFactor, ++i) {
-            size_t index = factor * imageSkeleton.size();
-            if (index <= 0 || index >= imageSkeleton.size())
-                continue;
-            selectedNodes.push_back(imageSkeleton[index]);
-        }
-        selectedNodes.push_back(imageSkeleton[imageSkeleton.size() - 1]);
-    }
-    
-    std::vector<QVector3D> selectedPositions;
-    selectedPositions.reserve(selectedNodes.size());
-    for (const auto &it: selectedNodes)
-        selectedPositions.push_back(QVector3D(it.first, it.second, 0.0f));
-    
-    std::vector<QVector3D> selectedDirections;
-    selectedDirections.reserve(selectedNodes.size());
-    for (size_t i = 0; i < selectedPositions.size(); ++i) {
-        QVector3D sumOfDirections;
-        if (i > 0) {
-            sumOfDirections += selectedPositions[i] - selectedPositions[i - 1];
-        }
-        if (i + 1 < selectedPositions.size()) {
-            sumOfDirections += selectedPositions[i + 1] - selectedPositions[i];
-        }
-        selectedDirections.push_back(sumOfDirections.normalized());
-    }
-    
-    std::vector<int> selectedRadius;
-    selectedRadius.reserve(selectedNodes.size());
-    for (size_t i = 0; i < selectedDirections.size(); ++i) {
-        selectedRadius.push_back(calculateNodeRadius(selectedPositions[i], selectedDirections[i],
-            blackPixels));
-    }
-    
-    skeleton->resize(selectedRadius.size());
-    auto canvasHeight = m_canvasSize.height();
-    for (size_t i = 0; i < skeleton->size(); ++i) {
-        const auto &node = selectedNodes[i];
-        (*skeleton)[i] = std::make_pair(QVector2D(node.first / scaleFactor + polygonTopLeft.x(),
-                node.second / scaleFactor + polygonTopLeft.y()) / canvasHeight,
-            selectedRadius[i] / scaleFactor / canvasHeight);
-    }
-}
-
-int ContourToPartConverter::calculateNodeRadius(const QVector3D &node,
-        const QVector3D &direction,
-        const std::set<std::pair<int, int>> &black)
-{
-    const QVector3D pointer = {0.0f, 0.0f, 1.0f};
-    QVector3D offsetDirection = QVector3D::crossProduct(direction, pointer);
-    int radius = 1;
-    while (true) {
-        QVector3D offset = radius * offsetDirection;
-        QVector3D sidePosition = node + offset;
-        QVector3D otherSidePosition = node - offset;
-        if (black.find(std::make_pair((int)sidePosition.x(), (int)sidePosition.y())) == black.end())
-            break;
-        if (black.find(std::make_pair((int)otherSidePosition.x(), (int)otherSidePosition.y())) == black.end())
-            break;
-        ++radius;
-    }
-    return radius;
-}
-
-void ContourToPartConverter::smoothRadius(std::vector<std::pair<QVector2D, float>> *skeleton)
-{
-    if (skeleton->empty())
-        return;
-    
-    std::vector<float> newRadius;
-    newRadius.reserve(skeleton->size() + 2);
-    newRadius.push_back(skeleton->front().second);
-    for (const auto &it: (*skeleton)) {
-        newRadius.push_back(it.second);
-    }
-    newRadius.push_back(skeleton->back().second);
-    for (size_t h = 0; h < skeleton->size(); ++h) {
-        size_t i = h + 1;
-        size_t j = h + 2;
-        (*skeleton)[h].second = (newRadius[h] +
-            newRadius[i] + newRadius[j]) / 3;
-    }
-}
-
-void ContourToPartConverter::optimizeNodes()
-{
-    auto oldNodes = m_nodes;
-    m_nodes.clear();
-    m_nodes.reserve(oldNodes.size());
-    for (size_t i = 0; i < oldNodes.size(); ++i) {
-        if (i > 0 && i + 1 < oldNodes.size()) {
-            size_t h = i - 1;
-            size_t j = i + 1;
-            if (std::abs(oldNodes[i].second - oldNodes[h].second) < m_radiusEpsilon &&
-                    std::abs(oldNodes[i].second - oldNodes[j].second) < m_radiusEpsilon) {
-                auto degrees = degreesBetweenVectors((oldNodes[i].first - oldNodes[h].first).normalized(),
-                    (oldNodes[j].first - oldNodes[i].first).normalized());
-                if (degrees < 15)
-                    continue;
-            }
-        }
-        m_nodes.push_back(oldNodes[i]);
-    }
-}
-
-void ContourToPartConverter::alignSkeleton(const std::vector<std::pair<QVector2D, float>> &referenceSkeleton,
-        std::vector<std::pair<QVector2D, float>> &adjustSkeleton)
-{
-    if (referenceSkeleton.empty() || adjustSkeleton.empty())
-        return;
-    float sumOfDistance2 = 0.0;
-    float reversedSumOfDistance2 = 0.0;
-    for (size_t i = 0; i < adjustSkeleton.size(); ++i) {
-        size_t j = ((float)i / adjustSkeleton.size()) * referenceSkeleton.size();
-        if (j >= referenceSkeleton.size())
-            continue;
-        size_t k = referenceSkeleton.size() - 1 - j;
-        sumOfDistance2 += std::pow(adjustSkeleton[i].first.y() - referenceSkeleton[j].first.y(), 2.0f);
-        reversedSumOfDistance2 += std::pow(adjustSkeleton[i].first.y() - referenceSkeleton[k].first.y(), 2.0f);
-    }
-    if (sumOfDistance2 <= reversedSumOfDistance2)
-        return;
-    std::reverse(adjustSkeleton.begin(), adjustSkeleton.end());
-}
-
-void ContourToPartConverter::convert()
-{
-    std::vector<std::pair<QVector2D, float>> sideSkeleton;
-    std::vector<std::pair<QVector2D, float>> mainSkeleton;
-    auto mainBoundingBox = m_mainProfile.boundingRect();
-    extractSkeleton(m_sideProfile, &sideSkeleton);
-    extractSkeleton(m_mainProfile, &mainSkeleton);
-    smoothRadius(&sideSkeleton);
-    smoothRadius(&mainSkeleton);
-    if (!sideSkeleton.empty()) {
-        alignSkeleton(sideSkeleton, mainSkeleton);
-        float defaultX = mainBoundingBox.center().x() / m_canvasSize.height();
-        float area = mainBoundingBox.width() * mainBoundingBox.height();
-        float mainBoundingBoxWidthHeightOffset = std::abs(mainBoundingBox.width() - mainBoundingBox.height());
-        float rectRadius = std::sqrt(area) * 0.5;
-        bool useCalculatedX = mainBoundingBoxWidthHeightOffset >= rectRadius;
-        m_nodes.reserve(sideSkeleton.size());
-        for (size_t i = 0; i < sideSkeleton.size(); ++i) {
-            const auto &it = sideSkeleton[i];
-            float x = defaultX;
-            if (useCalculatedX) {
-                size_t j = ((float)i / sideSkeleton.size()) * mainSkeleton.size();
-                x = j < mainSkeleton.size() ? mainSkeleton[j].first.x() : defaultX;
-            }
-            m_nodes.push_back(std::make_pair(QVector3D(x, it.first.y(), it.first.x()),
-                it.second));
-        }
-    }
-    optimizeNodes();
-    nodesToSnapshot();
-}
-
-void ContourToPartConverter::nodesToSnapshot()
-{
-    if (m_nodes.empty())
-        return;
-    
-    auto partId = QUuid::createUuid();
-    auto partIdString = partId.toString();
-    std::map<QString, QString> snapshotPart;
-    snapshotPart["id"] = partIdString;
-    snapshotPart["subdived"] = "true";
-    snapshotPart["rounded"] = "true";
-    snapshotPart["base"] = "YZ";
-    m_snapshot.parts[partIdString] = snapshotPart;
-    
-    auto componentId = QUuid::createUuid();
-    auto componentIdString = componentId.toString();
-    std::map<QString, QString> snapshotComponent;
-    snapshotComponent["id"] = componentIdString;
-    snapshotComponent["combineMode"] = "Normal";
-    snapshotComponent["linkDataType"] = "partId";
-    snapshotComponent["linkData"] = partIdString;
-    m_snapshot.components[componentIdString] = snapshotComponent;
-    
-    m_snapshot.rootComponent["children"] = componentIdString;
-    
-    std::vector<QString> nodeIdStrings;
-    nodeIdStrings.reserve(m_nodes.size());
-    for (const auto &it: m_nodes) {
-        auto nodeId = QUuid::createUuid();
-        auto nodeIdString = nodeId.toString();
-        std::map<QString, QString> snapshotNode;
-        snapshotNode["id"] = nodeIdString;
-        snapshotNode["x"] = QString::number(it.first.x());
-        snapshotNode["y"] = QString::number(it.first.y());
-        snapshotNode["z"] = QString::number(it.first.z());
-        snapshotNode["radius"] = QString::number(it.second);
-        snapshotNode["partId"] = partIdString;
-        m_snapshot.nodes[nodeIdString] = snapshotNode;
-        nodeIdStrings.push_back(nodeIdString);
-    }
-    
-    for (size_t i = 1; i < nodeIdStrings.size(); ++i) {
-        size_t h = i - 1;
-        auto edgeId = QUuid::createUuid();
-        auto edgeIdString = edgeId.toString();
-        std::map<QString, QString> snapshotEdge;
-        snapshotEdge["id"] = edgeIdString;
-        snapshotEdge["from"] = nodeIdStrings[h];
-        snapshotEdge["to"] = nodeIdStrings[i];
-        snapshotEdge["partId"] = partIdString;
-        m_snapshot.edges[edgeIdString] = snapshotEdge;
-    }
-}
-
diff --git a/src/contourtopartconverter.h b/src/contourtopartconverter.h
deleted file mode 100644
index 1dd02272..00000000
--- a/src/contourtopartconverter.h
+++ /dev/null
@@ -1,42 +0,0 @@
-#ifndef DUST3D_CONTOUR_TO_PART_CONVERTER_H
-#define DUST3D_CONTOUR_TO_PART_CONVERTER_H
-#include <QObject>
-#include <QPolygonF>
-#include <QVector3D>
-#include <QVector2D>
-#include <set>
-#include "snapshot.h"
-
-class ContourToPartConverter : public QObject
-{
-    Q_OBJECT
-public:
-    ContourToPartConverter(const QPolygonF &mainProfile, const QPolygonF &sideProfile, const QSizeF &canvasSize);
-    const Snapshot &getSnapshot();
-signals:
-    void finished();
-public slots:
-    void process();
-private:
-    QPolygonF m_mainProfile;
-    QPolygonF m_sideProfile;
-    QSizeF m_canvasSize;
-    Snapshot m_snapshot;
-    static const float m_targetImageHeight;
-    static const float m_minEdgeLength;
-    static const float m_radiusEpsilon;
-    std::vector<std::pair<QVector3D, float>> m_nodes;
-    void convert();
-    void extractSkeleton(const QPolygonF &polygon,
-        std::vector<std::pair<QVector2D, float>> *skeleton);
-    int calculateNodeRadius(const QVector3D &node,
-        const QVector3D &direction,
-        const std::set<std::pair<int, int>> &black);
-    void nodesToSnapshot();
-    void smoothRadius(std::vector<std::pair<QVector2D, float>> *skeleton);
-    void alignSkeleton(const std::vector<std::pair<QVector2D, float>> &referenceSkeleton,
-        std::vector<std::pair<QVector2D, float>> &adjustSkeleton);
-    void optimizeNodes();
-};
-
-#endif
diff --git a/src/document.cpp b/src/document.cpp
index 44e63f70..a74b30f5 100644
--- a/src/document.cpp
+++ b/src/document.cpp
@@ -18,7 +18,6 @@
 #include "skeletonside.h"
 #include "scriptrunner.h"
 #include "imageforever.h"
-#include "contourtopartconverter.h"
 #include "meshgenerator.h"
 
 unsigned long Document::m_maxSnapshot = 1000;
@@ -391,28 +390,6 @@ void Document::addNode(float x, float y, float z, float radius, QUuid fromNodeId
     createNode(QUuid::createUuid(), x, y, z, radius, fromNodeId);
 }
 
-void Document::addPartByPolygons(const QPolygonF &mainProfile, const QPolygonF &sideProfile, const QSizeF &canvasSize)
-{
-    if (mainProfile.empty() || sideProfile.empty())
-        return;
-    
-    QThread *thread = new QThread;
-    ContourToPartConverter *contourToPartConverter = new ContourToPartConverter(mainProfile, sideProfile, canvasSize);
-    contourToPartConverter->moveToThread(thread);
-    connect(thread, &QThread::started, contourToPartConverter, &ContourToPartConverter::process);
-    connect(contourToPartConverter, &ContourToPartConverter::finished, this, [=]() {
-        const auto &snapshot = contourToPartConverter->getSnapshot();
-        if (!snapshot.nodes.empty()) {
-            addFromSnapshot(snapshot, SnapshotSource::Paste);
-            saveSnapshot();
-        }
-        delete contourToPartConverter;
-    });
-    connect(contourToPartConverter, &ContourToPartConverter::finished, thread, &QThread::quit);
-    connect(thread, &QThread::finished, thread, &QThread::deleteLater);
-    thread->start();
-}
-
 void Document::addNodeWithId(QUuid nodeId, float x, float y, float z, float radius, QUuid fromNodeId)
 {
     createNode(nodeId, x, y, z, radius, fromNodeId);
diff --git a/src/document.h b/src/document.h
index 4f9b1790..10809a8e 100644
--- a/src/document.h
+++ b/src/document.h
@@ -506,7 +506,6 @@ public slots:
     void removeNode(QUuid nodeId);
     void removeEdge(QUuid edgeId);
     void removePart(QUuid partId);
-    void addPartByPolygons(const QPolygonF &mainProfile, const QPolygonF &sideProfile, const QSizeF &canvasSize);
     void addNodeWithId(QUuid nodeId, float x, float y, float z, float radius, QUuid fromNodeId);
     void addNode(float x, float y, float z, float radius, QUuid fromNodeId);
     void scaleNodeByAddRadius(QUuid nodeId, float amount);
diff --git a/src/documentwindow.cpp b/src/documentwindow.cpp
index 829619e8..7d322825 100644
--- a/src/documentwindow.cpp
+++ b/src/documentwindow.cpp
@@ -941,7 +941,6 @@ DocumentWindow::DocumentWindow() :
     connect(shapeGraphicsWidget, &SkeletonGraphicsWidget::setPartXmirrorState, m_document, &Document::setPartXmirrorState);
     connect(shapeGraphicsWidget, &SkeletonGraphicsWidget::setPartRoundState, m_document, &Document::setPartRoundState);
     connect(shapeGraphicsWidget, &SkeletonGraphicsWidget::setPartWrapState, m_document, &Document::setPartCutRotation);
-    connect(shapeGraphicsWidget, &SkeletonGraphicsWidget::addPartByPolygons, m_document, &Document::addPartByPolygons);
 
     connect(shapeGraphicsWidget, &SkeletonGraphicsWidget::setXlockState, m_document, &Document::setXlockState);
     connect(shapeGraphicsWidget, &SkeletonGraphicsWidget::setYlockState, m_document, &Document::setYlockState);
diff --git a/src/imageskeletonextractor.cpp b/src/imageskeletonextractor.cpp
deleted file mode 100644
index 085988d9..00000000
--- a/src/imageskeletonextractor.cpp
+++ /dev/null
@@ -1,260 +0,0 @@
-#include <QDebug>
-#include <queue>
-#include <set>
-#include "imageskeletonextractor.h"
-
-// This is an implementation of the following paper:
-// <A Fast Parallel Algorithm for Thinning Digital Patterns>
-// T. Y. ZHANG and C. Y. SUEN
-
-ImageSkeletonExtractor::~ImageSkeletonExtractor()
-{
-    delete m_image;
-    delete m_grayscaleImage;
-}
-
-void ImageSkeletonExtractor::setImage(QImage *image)
-{
-    delete m_image;
-    m_image = image;
-}
-
-QImage *ImageSkeletonExtractor::takeResultGrayscaleImage()
-{
-    QImage *resultImage = m_grayscaleImage;
-    m_grayscaleImage = nullptr;
-    return resultImage;
-}
-
-bool ImageSkeletonExtractor::firstSubiterationSatisfied(int i, int j)
-{
-    if (!isBlack(i, j))
-        return false;
-    auto blackNeighbors = countBlackNeighbors(i, j);
-    if (blackNeighbors < 2 || blackNeighbors > 6)
-        return false;
-    auto neighborTransitions = countNeighborTransitions(i, j);
-    if (1 != neighborTransitions)
-        return false;
-    if (isBlack(i + neighborOffsets[P2].first, j + neighborOffsets[P2].second) &&
-            isBlack(i + neighborOffsets[P4].first, j + neighborOffsets[P4].second) &&
-            isBlack(i + neighborOffsets[P6].first, j + neighborOffsets[P6].second)) {
-        return false;
-    }
-    if (isBlack(i + neighborOffsets[P4].first, j + neighborOffsets[P4].second) &&
-            isBlack(i + neighborOffsets[P6].first, j + neighborOffsets[P6].second) &&
-            isBlack(i + neighborOffsets[P8].first, j + neighborOffsets[P8].second)) {
-        return false;
-    }
-    return true;
-}
-
-bool ImageSkeletonExtractor::secondSubiterationSatisfied(int i, int j)
-{
-    if (!isBlack(i, j))
-        return false;
-    auto blackNeighbors = countBlackNeighbors(i, j);
-    if (blackNeighbors < 2 || blackNeighbors > 6)
-        return false;
-    auto neighborTransitions = countNeighborTransitions(i, j);
-    if (1 != neighborTransitions)
-        return false;
-    if (isBlack(i + neighborOffsets[P2].first, j + neighborOffsets[P2].second) &&
-            isBlack(i + neighborOffsets[P4].first, j + neighborOffsets[P4].second) &&
-            isBlack(i + neighborOffsets[P8].first, j + neighborOffsets[P8].second)) {
-        return false;
-    }
-    if (isBlack(i + neighborOffsets[P2].first, j + neighborOffsets[P2].second) &&
-            isBlack(i + neighborOffsets[P6].first, j + neighborOffsets[P6].second) &&
-            isBlack(i + neighborOffsets[P8].first, j + neighborOffsets[P8].second)) {
-        return false;
-    }
-    return true;
-}
-
-void ImageSkeletonExtractor::calculateAreaAndBlackPixels()
-{
-    m_area = 0;
-    m_blackPixels.clear();
-    for (int i = 1; i < (int)m_grayscaleImage->width() - 1; ++i) {
-        for (int j = 1; j < (int)m_grayscaleImage->height() - 1; ++j) {
-            if (isBlack(i, j)) {
-                ++m_area;
-                m_blackPixels.insert({i, j});
-            }
-        }
-    }
-}
-
-const std::set<std::pair<int, int>> &ImageSkeletonExtractor::getBlackPixels()
-{
-    return m_blackPixels;
-}
-
-int ImageSkeletonExtractor::getArea()
-{
-    return m_area;
-}
-
-void ImageSkeletonExtractor::extract()
-{
-    m_grayscaleImage = new QImage(m_image->convertToFormat(QImage::Format_Grayscale8));
-    calculateAreaAndBlackPixels();
-    while (true) {
-        std::vector<std::pair<int, int>> firstSatisfied;
-        for (int i = 1; i < (int)m_grayscaleImage->width() - 1; ++i) {
-            for (int j = 1; j < (int)m_grayscaleImage->height() - 1; ++j) {
-                if (firstSubiterationSatisfied(i, j))
-                    firstSatisfied.push_back(std::make_pair(i, j));
-            }
-        }
-        for (const auto &it: firstSatisfied)
-            setWhite(it.first, it.second);
-        std::vector<std::pair<int, int>> secondSatisfied;
-        for (int i = 1; i < (int)m_grayscaleImage->width() - 1; ++i) {
-            for (int j = 1; j < (int)m_grayscaleImage->height() - 1; ++j) {
-                if (secondSubiterationSatisfied(i, j))
-                    secondSatisfied.push_back(std::make_pair(i, j));
-            }
-        }
-        for (const auto &it: secondSatisfied)
-            setWhite(it.first, it.second);
-        if (firstSatisfied.empty() && secondSatisfied.empty())
-            break;
-    }
-}
-
-void ImageSkeletonExtractor::getSkeleton(std::vector<std::pair<int, int>> *skeleton)
-{
-    if (nullptr == m_grayscaleImage)
-        return;
-    
-    std::map<std::pair<int, int>, std::vector<std::pair<int, int>>> links;
-    for (int i = 1; i < (int)m_grayscaleImage->width() - 1; ++i) {
-        for (int j = 1; j < (int)m_grayscaleImage->height() - 1; ++j) {
-            if (!isBlack(i, j))
-                continue;
-            auto ij = std::make_pair(i, j);
-            auto p2 = std::make_pair(i + neighborOffsets[P2].first, j + neighborOffsets[P2].second);
-            bool hasP3 = true;
-            bool hasP5 = true;
-            bool hasP7 = true;
-            bool hasP9 = true;
-            if (isBlack(p2.first, p2.second)) {
-                links[ij].push_back(p2);
-                hasP3 = false;
-                hasP9 = false;
-            }
-            auto p4 = std::make_pair(i + neighborOffsets[P4].first, j + neighborOffsets[P4].second);
-            if (isBlack(p4.first, p4.second)) {
-                links[ij].push_back(p4);
-                hasP3 = false;
-                hasP5 = false;
-            }
-            auto p6 = std::make_pair(i + neighborOffsets[P6].first, j + neighborOffsets[P6].second);
-            if (isBlack(p6.first, p6.second)) {
-                links[ij].push_back(p6);
-                hasP5 = false;
-                hasP7 = false;
-            }
-            auto p8 = std::make_pair(i + neighborOffsets[P8].first, j + neighborOffsets[P8].second);
-            if (isBlack(p8.first, p8.second)) {
-                links[ij].push_back(p8);
-                hasP7 = false;
-                hasP9 = false;
-            }
-            if (hasP3) {
-                auto p3 = std::make_pair(i + neighborOffsets[P3].first, j + neighborOffsets[P3].second);
-                if (isBlack(p3.first, p3.second)) {
-                    links[ij].push_back(p3);
-                }
-            }
-            if (hasP5) {
-                auto p5 = std::make_pair(i + neighborOffsets[P5].first, j + neighborOffsets[P5].second);
-                if (isBlack(p5.first, p5.second)) {
-                    links[ij].push_back(p5);
-                }
-            }
-            if (hasP7) {
-                auto p7 = std::make_pair(i + neighborOffsets[P7].first, j + neighborOffsets[P7].second);
-                if (isBlack(p7.first, p7.second)) {
-                    links[ij].push_back(p7);
-                }
-            }
-            if (hasP9) {
-                auto p9 = std::make_pair(i + neighborOffsets[P9].first, j + neighborOffsets[P9].second);
-                if (isBlack(p9.first, p9.second)) {
-                    links[ij].push_back(p9);
-                }
-            }
-        }
-    }
-
-    auto calculateRouteLength = [&](const std::pair<int, int> &branch, const std::pair<int, int> &start) {
-        std::set<std::pair<int, int>> visited;
-        visited.insert(branch);
-        std::queue<std::pair<int, int>> waitPoints;
-        waitPoints.push(start);
-        size_t addLength = 0;
-        while (!waitPoints.empty()) {
-            auto point = waitPoints.front();
-            waitPoints.pop();
-            if (visited.find(point) != visited.end())
-                continue;
-            visited.insert(point);
-            auto findLink = links.find(point);
-            if (findLink == links.end())
-                break;
-            if (findLink->second.size() > 2) {
-                addLength = links.size(); // This will make sure the branch node is not been removed
-                break;
-            }
-            for (const auto &it: findLink->second) {
-                if (visited.find(it) != visited.end())
-                    continue;
-                waitPoints.push(it);
-            }
-        }
-        return visited.size() + addLength;
-    };
-    for (auto &it: links) {
-        if (it.second.size() > 2) {
-            std::vector<std::pair<std::pair<int, int>, size_t>> routes;
-            routes.reserve(it.second.size());
-            for (size_t i = 0; i < it.second.size(); ++i) {
-                routes.push_back(std::make_pair(it.second[i], calculateRouteLength(it.first, it.second[i])));
-            }
-            std::sort(routes.begin(), routes.end(), [](const std::pair<std::pair<int, int>, size_t> &first,
-                    const std::pair<std::pair<int, int>, size_t> &second) {
-                return first.second < second.second;
-            });
-            it.second = std::vector<std::pair<int, int>> {routes[routes.size() - 2].first,
-                routes[routes.size() - 1].first};
-        }
-    }
-    
-    std::queue<std::pair<int, int>> waitPoints;
-    for (const auto &it: links) {
-        if (1 == it.second.size()) {
-            waitPoints.push(it.first);
-            break;
-        }
-    }
-    std::set<std::pair<int, int>> visited;
-    while (!waitPoints.empty()) {
-        auto point = waitPoints.front();
-        waitPoints.pop();
-        if (visited.find(point) != visited.end())
-            continue;
-        visited.insert(point);
-        skeleton->push_back(point);
-        auto findLink = links.find(point);
-        if (findLink == links.end())
-            break;
-        for (const auto &it: findLink->second) {
-            if (visited.find(it) != visited.end())
-                continue;
-            waitPoints.push(it);
-        }
-    }
-}
diff --git a/src/imageskeletonextractor.h b/src/imageskeletonextractor.h
deleted file mode 100644
index 2cc85e89..00000000
--- a/src/imageskeletonextractor.h
+++ /dev/null
@@ -1,89 +0,0 @@
-#ifndef DUST3D_IMAGE_SKELETON_EXTRACTOR_H
-#define DUST3D_IMAGE_SKELETON_EXTRACTOR_H
-#include <QImage>
-#include <QObject>
-#include <vector>
-#include <set>
-
-class ImageSkeletonExtractor : QObject
-{
-    Q_OBJECT
-public:
-    const std::vector<std::pair<int, int>> neighborOffsets = {
-        { 0, -1},
-        { 1, -1},
-        { 1,  0},
-        { 1,  1},
-        { 0,  1},
-        {-1,  1},
-        {-1,  0},
-        {-1, -1},
-    };
-    enum {
-        P2 = 0,
-        P3,
-        P4,
-        P5,
-        P6,
-        P7,
-        P8,
-        P9
-    };
-
-    ~ImageSkeletonExtractor();
-    void setImage(QImage *image);
-    void extract();
-    QImage *takeResultGrayscaleImage();
-    void getSkeleton(std::vector<std::pair<int, int>> *skeleton);
-    int getArea();
-    const std::set<std::pair<int, int>> &getBlackPixels();
-private:
-    QImage *m_image = nullptr;
-    QImage *m_grayscaleImage = nullptr;
-    int m_area = 0;
-    std::set<std::pair<int, int>> m_blackPixels;
-    
-    bool isBlack(int i, int j)
-    {
-        return QColor(m_grayscaleImage->pixel(i, j)).black() > 0;
-    }
-    
-    bool isWhite(int i, int j)
-    {
-        return !isBlack(i, j);
-    }
-    
-    void setWhite(int i, int j)
-    {
-        m_grayscaleImage->setPixel(i, j, qRgb(255, 255, 255));
-    }
-    
-    int countNeighborTransitions(int i, int j)
-    {
-        int num = 0;
-        for (size_t m = 0; m < neighborOffsets.size(); ++m) {
-            size_t n = (m + 1) % neighborOffsets.size();
-            if (isWhite(i + neighborOffsets[m].first, j + neighborOffsets[m].second) &&
-                    isBlack(i + neighborOffsets[n].first, j + neighborOffsets[n].second)) {
-                ++num;
-            }
-        }
-        return num;
-    }
-    
-    int countBlackNeighbors(int i, int j)
-    {
-        int num = 0;
-        for (const auto &it: neighborOffsets) {
-            if (isBlack(i + it.first, j + it.second))
-                ++num;
-        }
-        return num;
-    }
-    
-    bool firstSubiterationSatisfied(int i, int j);
-    bool secondSubiterationSatisfied(int i, int j);
-    void calculateAreaAndBlackPixels();
-};
-
-#endif
diff --git a/src/skeletondocument.h b/src/skeletondocument.h
index 071eade1..c30ceb77 100644
--- a/src/skeletondocument.h
+++ b/src/skeletondocument.h
@@ -429,7 +429,6 @@ enum class SkeletonDocumentEditMode
 {
     Add = 0,
     Select,
-    Mark,
     Paint,
     Drag,
     ZoomIn,
diff --git a/src/skeletongraphicswidget.cpp b/src/skeletongraphicswidget.cpp
index 15c13e8f..4b2f718a 100644
--- a/src/skeletongraphicswidget.cpp
+++ b/src/skeletongraphicswidget.cpp
@@ -32,9 +32,7 @@ SkeletonGraphicsWidget::SkeletonGraphicsWidget(const SkeletonDocument *document)
     m_lastAddedY(false),
     m_lastAddedZ(false),
     m_selectionItem(nullptr),
-    m_markerItem(nullptr),
     m_rangeSelectionStarted(false),
-    m_markerStarted(false),
     m_mouseEventFromSelf(false),
     m_moveHappened(false),
     m_lastRot(0),
@@ -80,10 +78,6 @@ SkeletonGraphicsWidget::SkeletonGraphicsWidget(const SkeletonDocument *document)
     m_selectionItem->hide();
     scene()->addItem(m_selectionItem);
     
-    m_markerItem = new SkeletonGraphicsMarkerItem();
-    m_markerItem->hide();
-    scene()->addItem(m_markerItem);
-    
     m_mainOriginItem = new SkeletonGraphicsOriginItem(SkeletonProfile::Main);
     m_mainOriginItem->setRotated(m_rotated);
     m_mainOriginItem->hide();
@@ -140,7 +134,6 @@ void SkeletonGraphicsWidget::setBackgroundBlur(float turnaroundOpacity)
 void SkeletonGraphicsWidget::shortcutEscape()
 {
     if (SkeletonDocumentEditMode::Add == m_document->editMode ||
-            SkeletonDocumentEditMode::Mark == m_document->editMode ||
             SkeletonDocumentEditMode::Paint == m_document->editMode) {
         emit setEditMode(SkeletonDocumentEditMode::Select);
         return;
@@ -762,10 +755,6 @@ void SkeletonGraphicsWidget::updateCursor()
         m_cursorNodeItem->hide();
     }
     
-    if (SkeletonDocumentEditMode::Mark != m_document->editMode) {
-        m_markerItem->reset();
-    }
-    
     switch (m_document->editMode) {
         case SkeletonDocumentEditMode::Add:
             setCursor(QCursor(Theme::awesome()->icon(fa::plus).pixmap(Theme::toolIconFontSize, Theme::toolIconFontSize)));
@@ -773,13 +762,6 @@ void SkeletonGraphicsWidget::updateCursor()
         case SkeletonDocumentEditMode::Select:
             setCursor(QCursor(Theme::awesome()->icon(fa::mousepointer).pixmap(Theme::toolIconFontSize, Theme::toolIconFontSize), Theme::toolIconFontSize / 5, 0));
             break;
-        case SkeletonDocumentEditMode::Mark: {
-                auto pixmap = Theme::awesome()->icon(fa::pencil).pixmap(Theme::toolIconFontSize, Theme::toolIconFontSize);
-                QPixmap replacedPixmap(pixmap.size());
-                replacedPixmap.fill(m_markerItem->color());
-                replacedPixmap.setMask(pixmap.createMaskFromColor(Qt::transparent));
-                setCursor(QCursor(replacedPixmap, Theme::toolIconFontSize / 5, Theme::toolIconFontSize * 4 / 5));
-            } break;
         case SkeletonDocumentEditMode::Paint:
             setCursor(QCursor(Theme::awesome()->icon(fa::paintbrush).pixmap(Theme::toolIconFontSize, Theme::toolIconFontSize), Theme::toolIconFontSize * 0.2, Theme::toolIconFontSize * 0.8));
             break;
@@ -912,16 +894,6 @@ bool SkeletonGraphicsWidget::mouseMove(QMouseEvent *event)
         }
     }
     
-    if (SkeletonDocumentEditMode::Mark == m_document->editMode) {
-        if (m_markerStarted) {
-            QPointF mouseScenePos = mouseEventScenePos(event);
-            m_markerItem->addPoint(mouseScenePos);
-            if (!m_markerItem->isVisible())
-                m_markerItem->setVisible(true);
-            return true;
-        }
-    }
-    
     if (SkeletonDocumentEditMode::Select == m_document->editMode ||
             SkeletonDocumentEditMode::Add == m_document->editMode) {
         
@@ -1461,7 +1433,7 @@ void SkeletonGraphicsWidget::rotateAllMainProfileCounterclockwise90DegreeAlongOr
 bool SkeletonGraphicsWidget::mouseRelease(QMouseEvent *event)
 {
     if (event->button() == Qt::LeftButton) {
-        bool processed = m_dragStarted || m_moveStarted || m_rangeSelectionStarted || m_markerStarted;
+        bool processed = m_dragStarted || m_moveStarted || m_rangeSelectionStarted;
         if (m_dragStarted) {
             m_dragStarted = false;
             updateCursor();
@@ -1476,28 +1448,6 @@ bool SkeletonGraphicsWidget::mouseRelease(QMouseEvent *event)
             m_selectionItem->hide();
             m_rangeSelectionStarted = false;
         }
-        if (m_markerStarted) {
-            auto boundingBox = m_markerItem->polygon().boundingRect();
-            if (boundingBox.width() * boundingBox.height() > 4) {
-                const QPolygonF &previousPolygon = m_markerItem->previousPolygon();
-                if (previousPolygon.empty()) {
-                    m_markerItem->save();
-                    m_markerItem->toggleProfile();
-                } else {
-                    if (m_markerItem->isMainProfile()) {
-                        emit addPartByPolygons(m_markerItem->polygon(), previousPolygon, sceneRect().size());
-                    } else {
-                        emit addPartByPolygons(previousPolygon, m_markerItem->polygon(), sceneRect().size());
-                    }
-                    m_markerItem->reset();
-                }
-                m_markerItem->hide();
-                updateCursor();
-            } else {
-                m_markerItem->clear();
-            }
-            m_markerStarted = false;
-        }
         return processed;
     }
     return false;
@@ -1641,11 +1591,6 @@ bool SkeletonGraphicsWidget::mousePress(QMouseEvent *event)
                 m_rangeSelectionStartPos = mouseEventScenePos(event);
                 m_rangeSelectionStarted = true;
             }
-        } else if (SkeletonDocumentEditMode::Mark == m_document->editMode) {
-            if (!m_markerStarted) {
-                m_markerItem->addPoint(mouseEventScenePos(event));
-                m_markerStarted = true;
-            }
         }
     }
     return false;
@@ -1817,11 +1762,6 @@ void SkeletonGraphicsWidget::shortcutAddMode()
     }
 }
 
-//void SkeletonGraphicsWidget::shortcutMarkMode()
-//{
-//    emit setEditMode(SkeletonDocumentEditMode::Mark);
-//}
-
 void SkeletonGraphicsWidget::shortcutUndo()
 {
     emit undo();
@@ -1908,7 +1848,7 @@ void SkeletonGraphicsWidget::shortcutZoomSelectedBy1()
 
 void SkeletonGraphicsWidget::shortcutRotateSelectedByMinus1()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             hasSelection()) {
         rotateSelected(-1);
         emit groupOperationAdded();
@@ -1917,7 +1857,7 @@ void SkeletonGraphicsWidget::shortcutRotateSelectedByMinus1()
 
 void SkeletonGraphicsWidget::shortcutRotateSelectedBy1()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             hasSelection()) {
         rotateSelected(1);
         emit groupOperationAdded();
@@ -1926,7 +1866,7 @@ void SkeletonGraphicsWidget::shortcutRotateSelectedBy1()
 
 void SkeletonGraphicsWidget::shortcutMoveSelectedToLeft()
 {
-    if (SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) {
+    if (SkeletonDocumentEditMode::Select == m_document->editMode) {
         if (m_checkedOriginItem) {
             moveCheckedOrigin(-1, 0);
             emit groupOperationAdded();
@@ -1939,7 +1879,7 @@ void SkeletonGraphicsWidget::shortcutMoveSelectedToLeft()
 
 void SkeletonGraphicsWidget::shortcutMoveSelectedToRight()
 {
-    if (SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) {
+    if (SkeletonDocumentEditMode::Select == m_document->editMode) {
         if (m_checkedOriginItem) {
             moveCheckedOrigin(1, 0);
             emit groupOperationAdded();
@@ -1952,7 +1892,7 @@ void SkeletonGraphicsWidget::shortcutMoveSelectedToRight()
 
 void SkeletonGraphicsWidget::shortcutMoveSelectedToUp()
 {
-    if (SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) {
+    if (SkeletonDocumentEditMode::Select == m_document->editMode) {
         if (m_checkedOriginItem) {
             moveCheckedOrigin(0, -1);
             emit groupOperationAdded();
@@ -1965,7 +1905,7 @@ void SkeletonGraphicsWidget::shortcutMoveSelectedToUp()
 
 void SkeletonGraphicsWidget::shortcutMoveSelectedToDown()
 {
-    if (SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) {
+    if (SkeletonDocumentEditMode::Select == m_document->editMode) {
         if (m_checkedOriginItem) {
             moveCheckedOrigin(0, 1);
             emit groupOperationAdded();
@@ -1978,7 +1918,7 @@ void SkeletonGraphicsWidget::shortcutMoveSelectedToDown()
 
 void SkeletonGraphicsWidget::shortcutScaleSelectedByMinus1()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             hasSelection()) {
         scaleSelected(-1);
         emit groupOperationAdded();
@@ -1987,7 +1927,7 @@ void SkeletonGraphicsWidget::shortcutScaleSelectedByMinus1()
 
 void SkeletonGraphicsWidget::shortcutScaleSelectedBy1()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             hasSelection()) {
         scaleSelected(1);
         emit groupOperationAdded();
@@ -1996,7 +1936,7 @@ void SkeletonGraphicsWidget::shortcutScaleSelectedBy1()
 
 void SkeletonGraphicsWidget::shortcutSwitchProfileOnSelected()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             hasSelection()) {
         switchProfileOnRangeSelection();
     }
@@ -2018,7 +1958,7 @@ void SkeletonGraphicsWidget::shortcutShowOrHideSelectedPart()
 
 void SkeletonGraphicsWidget::shortcutEnableOrDisableSelectedPart()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             !m_lastCheckedPart.isNull()) {
         const SkeletonPart *part = m_document->findPart(m_lastCheckedPart);
         bool partDisabled = part && part->disabled;
@@ -2029,7 +1969,7 @@ void SkeletonGraphicsWidget::shortcutEnableOrDisableSelectedPart()
 
 void SkeletonGraphicsWidget::shortcutLockOrUnlockSelectedPart()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             !m_lastCheckedPart.isNull()) {
         const SkeletonPart *part = m_document->findPart(m_lastCheckedPart);
         bool partLocked = part && part->locked;
@@ -2040,7 +1980,7 @@ void SkeletonGraphicsWidget::shortcutLockOrUnlockSelectedPart()
 
 void SkeletonGraphicsWidget::shortcutXmirrorOnOrOffSelectedPart()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             !m_lastCheckedPart.isNull()) {
         const SkeletonPart *part = m_document->findPart(m_lastCheckedPart);
         bool partXmirrored = part && part->xMirrored;
@@ -2051,7 +1991,7 @@ void SkeletonGraphicsWidget::shortcutXmirrorOnOrOffSelectedPart()
 
 void SkeletonGraphicsWidget::shortcutSubdivedOrNotSelectedPart()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             !m_lastCheckedPart.isNull()) {
         const SkeletonPart *part = m_document->findPart(m_lastCheckedPart);
         bool partSubdived = part && part->subdived;
@@ -2062,7 +2002,7 @@ void SkeletonGraphicsWidget::shortcutSubdivedOrNotSelectedPart()
 
 void SkeletonGraphicsWidget::shortcutChamferedOrNotSelectedPart()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             !m_lastCheckedPart.isNull()) {
         const SkeletonPart *part = m_document->findPart(m_lastCheckedPart);
         bool partChamfered = part && part->chamfered;
@@ -2078,7 +2018,7 @@ void SkeletonGraphicsWidget::shortcutSelectAll()
 
 void SkeletonGraphicsWidget::shortcutRoundEndOrNotSelectedPart()
 {
-    if ((SkeletonDocumentEditMode::Select == m_document->editMode || SkeletonDocumentEditMode::Mark == m_document->editMode) &&
+    if ((SkeletonDocumentEditMode::Select == m_document->editMode) &&
             !m_lastCheckedPart.isNull()) {
         const SkeletonPart *part = m_document->findPart(m_lastCheckedPart);
         bool partRounded = part && part->rounded;
diff --git a/src/skeletongraphicswidget.h b/src/skeletongraphicswidget.h
index 8d158f76..3e43a2cc 100644
--- a/src/skeletongraphicswidget.h
+++ b/src/skeletongraphicswidget.h
@@ -124,72 +124,6 @@ public:
     }
 };
 
-class SkeletonGraphicsMarkerItem : public QGraphicsPolygonItem
-{
-public:
-    SkeletonGraphicsMarkerItem()
-    {
-        updateAppearance();
-    }
-    void addPoint(const QPointF &point)
-    {
-        m_polygon.append(point);
-        setPolygon(m_polygon);
-    }
-    void clear()
-    {
-        m_polygon.clear();
-        setPolygon(m_polygon);
-    }
-    QColor color()
-    {
-        return m_mainProfile ? Theme::red : Theme::green;
-    }
-    bool isMainProfile()
-    {
-        return m_mainProfile;
-    }
-    void toggleProfile()
-    {
-        m_mainProfile = !m_mainProfile;
-        updateAppearance();
-    }
-    void save()
-    {
-        m_previousPolygon = m_polygon;
-        clear();
-    }
-    const QPolygonF &previousPolygon()
-    {
-        return m_previousPolygon;
-    }
-    const QPolygonF &polygon()
-    {
-        return m_polygon;
-    }
-    void reset()
-    {
-        m_previousPolygon.clear();
-        clear();
-        if (!m_mainProfile) {
-            m_mainProfile = true;
-            updateAppearance();
-        }
-    }
-private:
-    QPolygonF m_polygon;
-    QPolygonF m_previousPolygon;
-    bool m_mainProfile = true;
-    void updateAppearance()
-    {
-        QColor penColor(color());
-        QPen pen(penColor);
-        pen.setWidth(2);
-        pen.setStyle(Qt::SolidLine);
-        setPen(pen);
-    }
-};
-
 class SkeletonGraphicsNodeItem : public QGraphicsEllipseItem
 {
 public:
@@ -513,8 +447,6 @@ signals:
     void showOrHideAllComponents();
     void shortcutToggleFlatShading();
     void shortcutToggleRotation();
-    void createGriddedPartsFromNodes(const std::set<QUuid> &nodeIds);
-    void addPartByPolygons(const QPolygonF &mainProfile, const QPolygonF &sideProfile, const QSizeF &canvasSize);
     void loadedTurnaroundImageChanged();
 public:
     SkeletonGraphicsWidget(const SkeletonDocument *document);
@@ -692,9 +624,7 @@ private: //need initialize
     float m_lastAddedY;
     float m_lastAddedZ;
     SkeletonGraphicsSelectionItem *m_selectionItem;
-    SkeletonGraphicsMarkerItem *m_markerItem;
     bool m_rangeSelectionStarted;
-    bool m_markerStarted;
     bool m_mouseEventFromSelf;
     bool m_moveHappened;
     int m_lastRot;