Add skeleton edit UI

dust3d.pro

@@ -12,6 +12,18 @@ HEADERS += src/modelingwidget.h
 SOURCES += src/skeletoneditwidget.cpp
 HEADERS += src/skeletoneditwidget.h
 
+SOURCES += src/skeletoneditgraphicsview.cpp
+HEADERS += src/skeletoneditgraphicsview.h
+
+SOURCES += src/skeletoneditnodeitem.cpp
+HEADERS += src/skeletoneditnodeitem.h
+
+SOURCES += src/skeletoneditedgeitem.cpp
+HEADERS += src/skeletoneditedgeitem.h
+
+SOURCES += src/skeletontomesh.cpp
+HEADERS += src/skeletontomesh.h
+
 SOURCES += src/mesh.cpp
 HEADERS += src/mesh.h
 

src/mainwindow.cpp

@@ -1,10 +1,14 @@
-#include "mainwindow.h"
-#include "skeletoneditwidget.h"
 #include <QVBoxLayout>
 #include <QPushButton>
 #include <QButtonGroup>
 #include <QGridLayout>
 #include <QToolBar>
+#include <QThread>
+#include <assert.h>
+#include "mainwindow.h"
+#include "skeletoneditwidget.h"
+#include "meshlite.h"
+#include "skeletontomesh.h"
 
 MainWindow::MainWindow()
 {
@@ -36,14 +40,15 @@ MainWindow::MainWindow()
     motionButton->adjustSize();
     modelButton->adjustSize();
     
-    SkeletonEditWidget *skeletonEditWidget = new SkeletonEditWidget;
-    ModelingWidget *modelViewWidget = new ModelingWidget;
-    modelViewWidget->setFixedSize(128, 128);
+    m_skeletonEditWidget = new SkeletonEditWidget;
+    
+    m_modelingWidget = new ModelingWidget;
+    m_modelingWidget->setFixedSize(128, 128);
     
     QPushButton *changeTurnaroundButton = new QPushButton("Change turnaround..");
     
     QVBoxLayout *rightLayout = new QVBoxLayout;
-    rightLayout->addWidget(modelViewWidget);
+    rightLayout->addWidget(m_modelingWidget);
     rightLayout->addSpacing(10);
     rightLayout->addWidget(changeTurnaroundButton);
     rightLayout->addStretch();
@@ -61,7 +66,7 @@ MainWindow::MainWindow()
     
     QHBoxLayout *middleLayout = new QHBoxLayout;
     middleLayout->addLayout(leftLayout);
-    middleLayout->addWidget(skeletonEditWidget);
+    middleLayout->addWidget(m_skeletonEditWidget);
     middleLayout->addLayout(rightLayout);
     
     QVBoxLayout *mainLayout = new QVBoxLayout;
@@ -74,5 +79,36 @@ MainWindow::MainWindow()
     
     setCentralWidget(centralWidget);
     setWindowTitle(tr("Dust 3D"));
+    
+    bool connectResult;
+    
+    connectResult = connect(addAction, SIGNAL(triggered(bool)), m_skeletonEditWidget->graphicsView(), SLOT(turnOnAddNodeMode()));
+    assert(connectResult);
+    
+    connectResult = connectResult = connect(selectAction, SIGNAL(triggered(bool)), m_skeletonEditWidget->graphicsView(), SLOT(turnOffAddNodeMode()));
+    assert(connectResult);
+    
+    connectResult = connect(m_skeletonEditWidget->graphicsView(), SIGNAL(nodesChanged()), this, SLOT(skeletonChanged()));
+    assert(connectResult);
 }
 
+void MainWindow::meshReady()
+{
+    SkeletonToMesh *worker = dynamic_cast<SkeletonToMesh *>(sender());
+    if (worker) {
+        m_modelingWidget->updateMesh(worker->takeResultMesh());
+    }
+}
+
+void MainWindow::skeletonChanged()
+{
+    QThread *thread = new QThread;
+    SkeletonToMesh *worker = new SkeletonToMesh(m_skeletonEditWidget->graphicsView());
+    worker->moveToThread(thread);
+    connect(thread, SIGNAL(started()), worker, SLOT(process()));
+    connect(worker, SIGNAL(finished()), thread, SLOT(quit()));
+    connect(worker, SIGNAL(finished()), this, SLOT(meshReady()));
+    connect(worker, SIGNAL(finished()), worker, SLOT(deleteLater()));
+    connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
+    thread->start();
+}

src/mainwindow.h

@@ -1,17 +1,20 @@
 #ifndef MAIN_WINDOW_H
 #define MAIN_WINDOW_H
-
 #include <QMainWindow>
 #include "modelingwidget.h"
+#include "skeletoneditwidget.h"
 
 class MainWindow : public QMainWindow
 {
     Q_OBJECT
 public:
     MainWindow();
-
+public slots:
+    void skeletonChanged();
+    void meshReady();
 private:
-    ModelingWidget *modelingWidget;
+    ModelingWidget *m_modelingWidget;
+    SkeletonEditWidget *m_skeletonEditWidget;
 };
 
 #endif

src/modelingwidget.cpp

@@ -3,7 +3,6 @@
 #include <QOpenGLShaderProgram>
 #include <QCoreApplication>
 #include <math.h>
-#include "meshlite.h"
 
 // Modifed from http://doc.qt.io/qt-5/qtopengl-hellogl2-glwidget-cpp.html
 
@@ -15,7 +14,9 @@ ModelingWidget::ModelingWidget(QWidget *parent)
       m_yRot(0),
       m_zRot(0),
       m_program(0),
-      m_mesh(NULL)
+      m_renderVertexCount(0),
+      m_mesh(NULL),
+      m_meshUpdated(false)
 {
     m_core = QSurfaceFormat::defaultFormat().profile() == QSurfaceFormat::CoreProfile;
     // --transparent causes the clear color to be transparent. Therefore, on systems that
@@ -25,16 +26,6 @@ ModelingWidget::ModelingWidget(QWidget *parent)
         fmt.setAlphaBufferSize(8);
         setFormat(fmt);
     }
-    
-    void *lite = meshlite_create_context();
-    int first = meshlite_import(lite, "../assets/cube.obj");
-    int second = meshlite_import(lite, "../assets/ball.obj");
-    meshlite_scale(lite, first, 0.65);
-    int merged = meshlite_union(lite, first, second);
-    int triangulate = meshlite_triangulate(lite, merged);
-    //meshlite_export(lite, triangulate, "/Users/jeremy/testlib.obj");
-    Mesh *mesh = new Mesh(lite, triangulate);
-    updateMesh(mesh);
 }
 
 ModelingWidget::~ModelingWidget()
@@ -96,7 +87,8 @@ void ModelingWidget::cleanup()
     if (m_program == nullptr)
         return;
     makeCurrent();
-    m_modelVbo.destroy();
+    if (m_modelVbo.isCreated())
+        m_modelVbo.destroy();
     delete m_program;
     m_program = 0;
     doneCurrent();
@@ -169,7 +161,8 @@ void ModelingWidget::initializeGL()
     connect(context(), &QOpenGLContext::aboutToBeDestroyed, this, &ModelingWidget::cleanup);
 
     initializeOpenGLFunctions();
-    glClearColor(0.2078, 0.2078, 0.2078, m_transparent ? 0 : 1);
+    QColor bgcolor = QWidget::palette().color(QWidget::backgroundRole());
+    glClearColor(bgcolor.redF(), bgcolor.greenF(), bgcolor.blueF(), m_transparent ? 0 : 1);
 
     m_program = new QOpenGLShaderProgram;
     m_program->addShaderFromSourceCode(QOpenGLShader::Vertex, m_core ? vertexShaderSourceCore : vertexShaderSource);
@@ -189,15 +182,10 @@ void ModelingWidget::initializeGL()
     // at all. Nonetheless the below code works in all cases and makes
     // sure there is a VAO when one is needed.
     m_vao.create();
-    QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao);
-
-    // Setup our vertex buffer object.
-    m_modelVbo.create();
-    m_modelVbo.bind();
-    m_modelVbo.allocate(m_mesh->vertices(), m_mesh->vertexCount() * sizeof(Vertex));
+    //QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao);
 
     // Store the vertex attribute bindings for the program.
-    setupVertexAttribs();
+    
 
     // Our camera never changes in this example.
     m_camera.setToIdentity();
@@ -232,13 +220,34 @@ void ModelingWidget::paintGL()
     m_world.rotate(m_zRot / 16.0f, 0, 0, 1);
 
     QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao);
+    
+    {
+        QMutexLocker lock(&m_meshMutex);
+        if (m_meshUpdated) {
+            if (m_mesh) {
+                // Setup our vertex buffer object.
+                if (m_modelVbo.isCreated())
+                    m_modelVbo.destroy();
+                m_modelVbo.create();
+                m_modelVbo.bind();
+                m_modelVbo.allocate(m_mesh->vertices(), m_mesh->vertexCount() * sizeof(Vertex));
+                m_renderVertexCount = m_mesh->vertexCount();
+                setupVertexAttribs();
+            } else {
+                m_renderVertexCount = 0;
+            }
+            m_meshUpdated = false;
+        }
+    }
+    
     m_program->bind();
     m_program->setUniformValue(m_projMatrixLoc, m_proj);
     m_program->setUniformValue(m_mvMatrixLoc, m_camera * m_world);
     QMatrix3x3 normalMatrix = m_world.normalMatrix();
     m_program->setUniformValue(m_normalMatrixLoc, normalMatrix);
-
-    glDrawArrays(GL_TRIANGLES, 0, m_mesh->vertexCount());
+    
+    if (m_renderVertexCount > 0)
+        glDrawArrays(GL_TRIANGLES, 0, m_renderVertexCount);
 
     m_program->release();
 }
@@ -275,6 +284,8 @@ void ModelingWidget::updateMesh(Mesh *mesh)
     if (mesh != m_mesh) {
         delete m_mesh;
         m_mesh = mesh;
+        m_meshUpdated = true;
+        update();
     }
 }
 

src/modelingwidget.h

@@ -55,6 +55,7 @@ private:
     QOpenGLVertexArrayObject m_vao;
     QOpenGLBuffer m_modelVbo;
     QOpenGLShaderProgram *m_program;
+    int m_renderVertexCount;
     int m_projMatrixLoc;
     int m_mvMatrixLoc;
     int m_normalMatrixLoc;
@@ -66,6 +67,7 @@ private:
     
     Mesh *m_mesh;
     QMutex m_meshMutex;
+    bool m_meshUpdated;
 };
 
 #endif

src/skeletoneditedgeitem.cpp

@@ -0,0 +1,27 @@
+#include <QPen>
+#include "skeletoneditedgeitem.h"
+
+SkeletonEditEdgeItem::SkeletonEditEdgeItem(QGraphicsItem *parent) :
+    QGraphicsLineItem(parent),
+    m_firstNode(NULL),
+    m_secondNode(NULL)
+{
+    QPen pen(Qt::darkGray);
+    pen.setWidth(15);
+    setPen(pen);
+}
+
+void SkeletonEditEdgeItem::setNodes(SkeletonEditNodeItem *first, SkeletonEditNodeItem *second)
+{
+    m_firstNode = first;
+    m_secondNode = second;
+    updatePosition();
+}
+
+void SkeletonEditEdgeItem::updatePosition()
+{
+    if (m_firstNode && m_secondNode) {
+        QLineF line(m_firstNode->origin(), m_secondNode->origin());
+        setLine(line);
+    }
+}

src/skeletoneditedgeitem.h

@@ -0,0 +1,17 @@
+#ifndef SKELETON_EDIT_EDGE_ITEM_H
+#define SKELETON_EDIT_EDGE_ITEM_H
+#include <QGraphicsEllipseItem>
+#include "skeletoneditnodeitem.h"
+
+class SkeletonEditEdgeItem : public QGraphicsLineItem
+{
+public:
+    SkeletonEditEdgeItem(QGraphicsItem *parent = 0);
+    void setNodes(SkeletonEditNodeItem *first, SkeletonEditNodeItem *second);
+    void updatePosition();
+private:
+    SkeletonEditNodeItem *m_firstNode;
+    SkeletonEditNodeItem *m_secondNode;
+};
+
+#endif

src/skeletoneditgraphicsview.cpp

@@ -0,0 +1,181 @@
+#include <QGraphicsPixmapItem>
+#include "skeletoneditgraphicsview.h"
+#include "skeletoneditnodeitem.h"
+#include "skeletoneditedgeitem.h"
+
+qreal SkeletonEditGraphicsView::m_initialNodeSize = 128;
+qreal SkeletonEditGraphicsView::m_minimalNodeSize = 32;
+
+SkeletonEditGraphicsView::SkeletonEditGraphicsView(QWidget *parent) :
+    QGraphicsView(parent),
+    m_pendingNodeItem(NULL),
+    m_pendingEdgeItem(NULL),
+    m_inAddNodeMode(true),
+    m_nextStartNodeItem(NULL),
+    m_lastHoverNodeItem(NULL)
+{
+    setScene(new QGraphicsScene());
+    
+    setMouseTracking(true);
+    
+    QImage image("../assets/male_werewolf_turnaround_lineart_by_jennette_brown.png");
+    m_backgroundItem = new QGraphicsPixmapItem(QPixmap::fromImage(image));
+    scene()->addItem(m_backgroundItem);
+    
+    m_pendingNodeItem = new QGraphicsEllipseItem(0, 0, m_initialNodeSize, m_initialNodeSize);
+    scene()->addItem(m_pendingNodeItem);
+    
+    m_pendingEdgeItem = new QGraphicsLineItem(0, 0, 0, 0);
+    scene()->addItem(m_pendingEdgeItem);
+    
+    applyAddNodeMode();
+}
+
+void SkeletonEditGraphicsView::toggleAddNodeMode()
+{
+    m_inAddNodeMode = !m_inAddNodeMode;
+    applyAddNodeMode();
+}
+
+void SkeletonEditGraphicsView::applyAddNodeMode()
+{
+    m_pendingNodeItem->setVisible(m_inAddNodeMode);
+    m_pendingEdgeItem->setVisible(m_inAddNodeMode);
+    setMouseTracking(true);
+}
+
+void SkeletonEditGraphicsView::turnOffAddNodeMode()
+{
+    m_inAddNodeMode = false;
+    applyAddNodeMode();
+}
+
+void SkeletonEditGraphicsView::turnOnAddNodeMode()
+{
+    m_inAddNodeMode = true;
+    applyAddNodeMode();
+}
+
+SkeletonEditNodeItem *SkeletonEditGraphicsView::findNodeItemByPos(QPointF pos)
+{
+    QList<QGraphicsItem *>::iterator it;
+    QList<QGraphicsItem *> list = scene()->items();
+    for (it = list.begin(); it != list.end(); ++it) {
+        SkeletonEditNodeItem *nodeItem = dynamic_cast<SkeletonEditNodeItem *>(*it);
+        if (nodeItem) {
+            SkeletonEditNodeItem *nodeItem = (SkeletonEditNodeItem *)(*it);
+            if (nodeItem->rect().contains(pos)) {
+                return nodeItem;
+            }
+        }
+    }
+    return NULL;
+}
+
+void SkeletonEditGraphicsView::mousePressEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton) {
+        if (!m_inAddNodeMode) {
+            if (m_lastHoverNodeItem) {
+                setNextStartNodeItem(m_lastHoverNodeItem);
+                m_lastHoverNodeItem = NULL;
+            }
+        }
+    }
+}
+
+void SkeletonEditGraphicsView::mouseReleaseEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton) {
+        if (m_inAddNodeMode) {
+            SkeletonEditNodeItem *newNode = new SkeletonEditNodeItem(m_pendingNodeItem->rect());
+            scene()->addItem(newNode);
+            if (m_nextStartNodeItem) {
+                SkeletonEditEdgeItem *newEdge = new SkeletonEditEdgeItem();
+                newEdge->setNodes(newNode, m_nextStartNodeItem);
+                scene()->addItem(newEdge);
+            }
+            setNextStartNodeItem(newNode);
+            emit nodesChanged();
+        }
+    } else if (event->button() == Qt::RightButton) {
+        if (m_inAddNodeMode) {
+            toggleAddNodeMode();
+        }
+    }
+}
+
+void SkeletonEditGraphicsView::mouseMoveEvent(QMouseEvent *event)
+{
+    QWidget::mouseMoveEvent(event);
+    QPointF pos = mapToScene(event->pos());
+    QPointF moveTo = QPointF(pos.x() - m_pendingNodeItem->rect().width() / 2, pos.y() - m_pendingNodeItem->rect().height() / 2);
+    if (moveTo.x() < 0)
+        moveTo.setX(0);
+    if (moveTo.y() < 0)
+        moveTo.setY(0);
+    if (moveTo.x() + m_pendingNodeItem->rect().width() >= m_backgroundItem->boundingRect().width())
+        moveTo.setX(m_backgroundItem->boundingRect().width() - m_pendingNodeItem->rect().width());
+    if (moveTo.y() + m_pendingNodeItem->rect().height() >= m_backgroundItem->boundingRect().height())
+        moveTo.setY(m_backgroundItem->boundingRect().height() - m_pendingNodeItem->rect().height());
+    QSizeF oldSize = m_pendingNodeItem->rect().size();
+    m_pendingNodeItem->setRect(moveTo.x(), moveTo.y(),
+        oldSize.width(),
+        oldSize.height());
+    if (m_nextStartNodeItem) {
+        m_pendingEdgeItem->setLine(QLineF(m_nextStartNodeItem->origin(), QPointF(moveTo.x() + m_pendingNodeItem->rect().width() / 2,
+            moveTo.y() + m_pendingNodeItem->rect().height() / 2)));
+    }
+    if (!m_inAddNodeMode) {
+        SkeletonEditNodeItem *hoverNodeItem = findNodeItemByPos(pos);
+        if (hoverNodeItem) {
+            hoverNodeItem->setHighlighted(true);
+        }
+        if (hoverNodeItem != m_lastHoverNodeItem) {
+            if (m_lastHoverNodeItem)
+                m_lastHoverNodeItem->setHighlighted(false);
+            m_lastHoverNodeItem = hoverNodeItem;
+        }
+    } else {
+        if (m_lastHoverNodeItem) {
+            m_lastHoverNodeItem->setHighlighted(false);
+            m_lastHoverNodeItem = NULL;
+        }
+    }
+}
+
+void SkeletonEditGraphicsView::wheelEvent(QWheelEvent *event)
+{
+    QWidget::wheelEvent(event);
+    qreal delta = event->delta();
+    QSizeF oldSize = m_pendingNodeItem->rect().size();
+    QPointF originPt = QPointF(m_pendingNodeItem->rect().left() + oldSize.width() / 2,
+        m_pendingNodeItem->rect().top() + oldSize.height() / 2);
+    QSizeF newSize = QSizeF(oldSize.width() + delta, oldSize.height() + delta);
+    if (newSize.width() < m_minimalNodeSize || newSize.height() < m_minimalNodeSize) {
+        newSize.setWidth(m_minimalNodeSize);
+        newSize.setHeight(m_minimalNodeSize);
+    }
+    QPointF newLeftTop = QPointF(originPt.x() - newSize.width() / 2,
+        originPt.y() - newSize.height() / 2);
+    if (newLeftTop.x() < 0 || newLeftTop.x() + newSize.width() >= m_backgroundItem->boundingRect().width())
+        return;
+    if (newLeftTop.y() < 0 || newLeftTop.y() + newSize.height() >= m_backgroundItem->boundingRect().height())
+        return;
+    m_pendingNodeItem->setRect(newLeftTop.x(),
+        newLeftTop.y(),
+        newSize.width(),
+        newSize.height());
+}
+
+void SkeletonEditGraphicsView::setNextStartNodeItem(SkeletonEditNodeItem *item)
+{
+    if (m_nextStartNodeItem != item) {
+        if (m_nextStartNodeItem)
+            m_nextStartNodeItem->setIsNextStartNode(false);
+    }
+    m_nextStartNodeItem = item;
+    if (m_nextStartNodeItem)
+        m_nextStartNodeItem->setIsNextStartNode(true);
+}
+

src/skeletoneditgraphicsview.h

@@ -0,0 +1,39 @@
+#ifndef SKELETON_EDIT_GRAPHICS_VIEW_H
+#define SKELETON_EDIT_GRAPHICS_VIEW_H
+#include <QGraphicsView>
+#include <QMouseEvent>
+#include "skeletoneditnodeitem.h"
+#include "skeletoneditedgeitem.h"
+
+class SkeletonEditGraphicsView : public QGraphicsView
+{
+    Q_OBJECT
+signals:
+    void nodesChanged();
+public slots:
+    void turnOffAddNodeMode();
+    void turnOnAddNodeMode();
+public:
+    SkeletonEditGraphicsView(QWidget *parent = 0);
+protected:
+    void mouseMoveEvent(QMouseEvent *event);
+    void wheelEvent(QWheelEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event);
+    void mousePressEvent(QMouseEvent *event);
+private:
+    QGraphicsPixmapItem *m_backgroundItem;
+    QGraphicsEllipseItem *m_pendingNodeItem;
+    QGraphicsLineItem *m_pendingEdgeItem;
+    static qreal m_initialNodeSize;
+    static qreal m_minimalNodeSize;
+    bool m_inAddNodeMode;
+    SkeletonEditNodeItem *m_nextStartNodeItem;
+    SkeletonEditNodeItem *m_lastHoverNodeItem;
+    void toggleAddNodeMode();
+    void applyAddNodeMode();
+    SkeletonEditNodeItem *findNodeItemByPos(QPointF pos);
+    void setNextStartNodeItem(SkeletonEditNodeItem *item);
+    
+};
+
+#endif

src/skeletoneditnodeitem.cpp

@@ -0,0 +1,39 @@
+#include <QPen>
+#include "skeletoneditnodeitem.h"
+
+SkeletonEditNodeItem::SkeletonEditNodeItem(const QRectF &rect, QGraphicsItem *parent) :
+    QGraphicsEllipseItem(rect, parent),
+    m_highlighted(false),
+    m_isNextStartNode(false)
+{
+    updateBorder();
+}
+
+QPointF SkeletonEditNodeItem::origin()
+{
+    return QPointF(rect().left() + rect().width() / 2,
+        rect().top() + rect().height() / 2);
+}
+
+void SkeletonEditNodeItem::setHighlighted(bool highlighted)
+{
+    m_highlighted = highlighted;
+    if (m_highlighted) {
+        setBrush(QBrush(Qt::gray));
+    } else {
+        setBrush(QBrush(Qt::transparent));
+    }
+}
+
+void SkeletonEditNodeItem::setIsNextStartNode(bool isNextStartNode)
+{
+    m_isNextStartNode = isNextStartNode;
+    updateBorder();
+}
+
+void SkeletonEditNodeItem::updateBorder()
+{
+    QPen pen(m_isNextStartNode ? Qt::black : Qt::darkGray);
+    pen.setWidth(15);
+    setPen(pen);
+}

src/skeletoneditnodeitem.h

@@ -0,0 +1,19 @@
+#ifndef SKELETON_EDIT_NODE_ITEM_H
+#define SKELETON_EDIT_NODE_ITEM_H
+#include <QGraphicsEllipseItem>
+
+class SkeletonEditNodeItem : public QGraphicsEllipseItem
+{
+public:
+    SkeletonEditNodeItem(const QRectF &rect, QGraphicsItem *parent = 0);
+    QPointF origin();
+    void setHighlighted(bool highlited);
+    void setIsNextStartNode(bool isNextStartNode);
+private:
+    bool m_highlighted;
+    bool m_isNextStartNode;
+    void updateBorder();
+};
+
+#endif
+

src/skeletoneditwidget.cpp

@@ -6,23 +6,34 @@
 
 // Modifed from http://doc.qt.io/qt-5/qtwidgets-graphicsview-chip-view-cpp.html
 
-SkeletonEditWidget::SkeletonEditWidget(QFrame *parent)
-    : QFrame(parent)
+SkeletonEditWidget::SkeletonEditWidget(QFrame *parent) :
+    QFrame(parent)
 {
-    //setFrameStyle(Sunken | StyledPanel);
+    m_graphicsView = new SkeletonEditGraphicsView(this);
+    m_graphicsView->setRenderHint(QPainter::Antialiasing, false);
+    m_graphicsView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    m_graphicsView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     
-    graphicsView = new QGraphicsView(this);
-    graphicsView->setRenderHint(QPainter::Antialiasing, false);
-    
-    scene = new QGraphicsScene();
-    graphicsView->setScene(scene);
-    
-    QImage image("../assets/male_werewolf_turnaround_lineart_by_jennette_brown.png");
-    QGraphicsPixmapItem *backgroundItem = new QGraphicsPixmapItem(QPixmap::fromImage(image));
-    scene->addItem(backgroundItem);
+    m_graphicsView->setBackgroundBrush(QBrush(QWidget::palette().color(QWidget::backgroundRole()), Qt::SolidPattern));
     
     QGridLayout *mainLayout = new QGridLayout;
-    mainLayout->addWidget(graphicsView, 0, 0, 1, 1);
+    mainLayout->addWidget(m_graphicsView, 0, 0, 1, 1);
     
     setLayout(mainLayout);
 }
+
+SkeletonEditGraphicsView *SkeletonEditWidget::graphicsView()
+{
+    return m_graphicsView;
+}
+
+void SkeletonEditWidget::resizeEvent(QResizeEvent *event)
+{
+    QFrame::resizeEvent(event);
+    m_graphicsView->fitInView(QRectF(0, 0, m_graphicsView->scene()->width(), m_graphicsView->scene()->height()), Qt::KeepAspectRatio);
+}
+
+void SkeletonEditWidget::mouseMoveEvent(QMouseEvent *event)
+{
+    QFrame::mouseMoveEvent(event);
+}

src/skeletoneditwidget.h

@@ -3,15 +3,22 @@
 #include <QFrame>
 #include <QGraphicsView>
 #include <QGraphicsScene>
+#include <QGraphicsPixmapItem>
+#include <QMouseEvent>
+#include <QGraphicsEllipseItem>
+#include "skeletoneditgraphicsview.h"
 
 class SkeletonEditWidget : public QFrame
 {
     Q_OBJECT
 public:
     SkeletonEditWidget(QFrame *parent = 0);
+    SkeletonEditGraphicsView *graphicsView();
+protected:
+    void resizeEvent(QResizeEvent *event);
+    void mouseMoveEvent(QMouseEvent *event);
 private:
-    QGraphicsView *graphicsView;
-    QGraphicsScene *scene;
+    SkeletonEditGraphicsView *m_graphicsView;
 };
 
 #endif

src/skeletontomesh.cpp

@@ -0,0 +1,34 @@
+#include "skeletontomesh.h"
+#include "meshlite.h"
+
+// Modified from https://wiki.qt.io/QThreads_general_usage
+
+SkeletonToMesh::SkeletonToMesh(SkeletonEditGraphicsView *graphicsView) :
+    m_mesh(NULL)
+{
+}
+
+SkeletonToMesh::~SkeletonToMesh()
+{
+    delete m_mesh;
+}
+
+Mesh *SkeletonToMesh::takeResultMesh()
+{
+    Mesh *mesh = m_mesh;
+    m_mesh = NULL;
+    return mesh;
+}
+
+void SkeletonToMesh::process()
+{
+    void *lite = meshlite_create_context();
+    int first = meshlite_import(lite, "../assets/cube.obj");
+    int second = meshlite_import(lite, "../assets/ball.obj");
+    meshlite_scale(lite, first, 0.65);
+    int merged = meshlite_union(lite, first, second);
+    int triangulate = meshlite_triangulate(lite, merged);
+    //meshlite_export(lite, triangulate, "/Users/jeremy/testlib.obj");
+    m_mesh = new Mesh(lite, triangulate);
+    emit finished();
+}

src/skeletontomesh.h

@@ -0,0 +1,23 @@
+#ifndef SKELETON_TO_MESH_H
+#define SKELETON_TO_MESH_H
+#include <QObject>
+#include <QList>
+#include "skeletoneditgraphicsview.h"
+#include "mesh.h"
+
+class SkeletonToMesh : public QObject 
+{
+    Q_OBJECT
+public:
+    SkeletonToMesh(SkeletonEditGraphicsView *graphicsView);
+    ~SkeletonToMesh();
+    Mesh *takeResultMesh();
+signals:
+    void finished();
+public slots:
+    void process();
+private:
+    Mesh *m_mesh;
+};
+
+#endif