Convert visual layers to scene nodes.

apps/sample-gui/MediaTool.cpp

@@ -6,6 +6,7 @@
 #include "WebClientView.h"
 #include "TabbedPanelWidget.h"
 #include "TopBar.h"
+#include "TextNode.h"
 #include "StatusBar.h"
 #include "HorizontalSpacer.h"
 

apps/sample-gui/audio_editor/AudioEditorView.cpp

@@ -2,6 +2,7 @@
 
 #include "Label.h"
 #include "Color.h"
+#include "TextNode.h"
 
 AudioEditorView::AudioEditorView()
 {

apps/sample-gui/image_editor/ImageEditorView.cpp

@@ -2,6 +2,7 @@
 
 #include "Label.h"
 #include "Color.h"
+#include "TextNode.h"
 
 ImageEditorView::ImageEditorView()
 {

apps/sample-gui/text_editor/TextEditorView.cpp

@@ -1,6 +1,8 @@
 #include "HorizontalSpacer.h"
 #include "TextEditorView.h"
 #include "VerticalSpacer.h"
+#include "TextNode.h"
+
 #include <iostream>
 
 TextEditorView::TextEditorView()

apps/sample-gui/web_client/WebClientView.cpp

@@ -2,6 +2,7 @@
 
 #include "Label.h"
 #include "Color.h"
+#include "TextNode.h"
 
 WebClientView::WebClientView()
 {

src/client/TabbedPanelWidget.cpp

@@ -2,6 +2,7 @@
 #include "StackWidget.h"
 #include "HorizontalSpacer.h"
 #include "VerticalSpacer.h"
+#include "TextNode.h"
 #include "Button.h"
 
 TabbedPanelWidget::TabbedPanelWidget()

src/geometry/Point.h

@@ -9,7 +9,7 @@ class Point
 {
 public:
 
-    Point(double x, double y, double z = 0);
+    Point(double x = 0, double y = 0, double z = 0);
 
     Point(const DiscretePoint& point);
 
@@ -33,6 +33,17 @@ public:
 
     double getDeltaY(const Point& point) const;
 
+    bool operator==(const Point& rhs) const
+    {
+       return (mX == rhs.mX)
+       && (mY == rhs.mY)
+       && (mZ == rhs.mZ);
+    }
+    bool operator!=(const Point& rhs) const
+    {
+      return !operator==(rhs);
+    }
+
 private:
     double mX{0};
     double mY{0};

src/graphics/DrawingContext.cpp

@@ -12,7 +12,6 @@
 DrawingContext::DrawingContext(DrawingSurface* surface, FontsManager* fontsManager, DrawingMode requestedDrawingMode)
     : mSurface(surface),
       mDrawingMode(requestedDrawingMode),
-      mScene(std::make_unique<Scene>()),
       mFontsManager(fontsManager)
 {
     mPainter = PainterFactory::Create(mDrawingMode);
@@ -23,11 +22,6 @@ std::unique_ptr<DrawingContext> DrawingContext::Create(DrawingSurface* surface,
     return std::make_unique<DrawingContext>(surface, fontsManager, requestedDrawingMode);
 }
 
-Scene* DrawingContext::getScene() const
-{
-    return mScene.get();
-}
-
 DrawingSurface* DrawingContext::getSurface() const
 {
     return mSurface;
@@ -40,6 +34,10 @@ FontsManager* DrawingContext::getFontsManager() const
 
 void DrawingContext::paint()
 {
-    mScene->update(mFontsManager, mDrawingMode == DrawingMode::RASTER ? mSurface->getImage() : nullptr);
+    if (mDrawingMode == DrawingMode::GRAPH)
+    {
+        mSurface->getScene()->update(mFontsManager);
+    }
+
     mPainter->paint(this);
 }

src/graphics/DrawingContext.h

@@ -3,7 +3,6 @@
 #include <memory>
 #include <vector>
 
-class Scene;
 class AbstractPainter;
 class DrawingSurface;
 class FontsManager;
@@ -21,8 +20,6 @@ public:
 
     static std::unique_ptr<DrawingContext> Create(DrawingSurface* surface, FontsManager* fontsManager, DrawingMode requestedDrawingMode);
 
-    Scene* getScene() const;
-
     DrawingSurface* getSurface() const;
 
     FontsManager* getFontsManager() const;
@@ -33,7 +30,7 @@ private:
     DrawingMode mDrawingMode;
     FontsManager* mFontsManager{nullptr};
     DrawingSurface* mSurface{nullptr};
-    std::unique_ptr<Scene> mScene;
+
     std::unique_ptr<AbstractPainter> mPainter;
 };
 

src/graphics/DrawingSurface.cpp

@@ -1,6 +1,14 @@
 #include "DrawingSurface.h"
 
 #include "Image.h"
+#include "Scene.h"
+
+#include "RootNode.h"
+
+DrawingSurface::DrawingSurface()
+{
+
+}
 
 std::unique_ptr<DrawingSurface> DrawingSurface::Create()
 {
@@ -23,6 +31,15 @@ unsigned DrawingSurface::getHeight() const
     return mHeight;
 }
 
+Scene* DrawingSurface::getScene()
+{
+    if (!mScene)
+    {
+        mScene = std::make_unique<Scene>();
+    }
+    return mScene.get();
+}
+
 Image<unsigned char>* DrawingSurface::getImage()
 {
     if (!mBackingImage)

src/graphics/DrawingSurface.h

@@ -2,13 +2,15 @@
 
 #include <memory>
 
+class Scene;
+
 template<typename T>
 class Image;
 
 class DrawingSurface
 {
 public:
-    DrawingSurface() = default;
+    DrawingSurface();
     virtual ~DrawingSurface() = default;
 
     static std::unique_ptr<DrawingSurface> Create();
@@ -21,8 +23,11 @@ public:
 
     Image<unsigned char>* getImage();
 
+    Scene* getScene();
+
 protected:
     unsigned mWidth = 0;
     unsigned mHeight = 0;
+    std::unique_ptr<Scene> mScene;
     std::unique_ptr<Image<unsigned char> > mBackingImage;
 };

src/graphics/opengl/OpenGlMeshPainter.cpp

@@ -2,6 +2,7 @@
 
 #include "DrawingContext.h"
 #include "DrawingSurface.h"
+#include "SceneModel.h"
 #include "TriMesh.h"
 
 #include "OpenGlShaderProgram.h"
@@ -64,12 +65,12 @@ void OpenGlMeshPainter::paint(const std::vector<float>& verts, const std::vector
     int vertexColorLocation = glGetUniformLocation(mShaderProgram->getHandle(), "ourColor");
     glUniform4f(vertexColorLocation, float(color[0]), float(color[1]), float(color[2]), float(color[3]));
 
-    //glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
     glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
     glBindVertexArray(0);
 }
 
-void OpenGlMeshPainter::paint(TriMesh* mesh, DrawingContext* context)
+void OpenGlMeshPainter::paint(SceneModel* model, DrawingContext* context)
 {
     if (!mShaderProgram)
     {
@@ -85,27 +86,29 @@ void OpenGlMeshPainter::paint(TriMesh* mesh, DrawingContext* context)
     const auto width = float(surface->getWidth());
     const auto height = float(surface->getHeight());
 
+    auto mesh = dynamic_cast<TriMesh*>(model->getMesh());
+
+    auto transform = model->getTransform();
+
     auto vertices = mesh->getVerticesFlat<float>();
     for (std::size_t idx = 0; idx<vertices.size(); idx++)
     {
         if (idx % 3 == 0)
         {
-            vertices[idx] = 2*vertices[idx]/width - 1.0;
+            auto x = vertices[idx]*transform.getScaleX() + transform.getLocation().getX();
+            vertices[idx] = 2*x/width - 1.0;
         }
         else if(idx%3 == 1)
         {
-            vertices[idx] = 1.0 - 2*vertices[idx]/height;
+            auto y = vertices[idx]*transform.getScaleY() + transform.getLocation().getY();
+            vertices[idx] = 1.0 - 2*y/height;
         }
     }
 
     const auto indices = mesh->getFaceNodeIds();
 
-    std::vector<float> color(4, 1.0f);
-    if (mesh->hasVectorAttribute("Color"))
-    {
-        auto mesh_color = mesh->getVectorAttribute("Color");
-        color = {float(mesh_color[0]), float(mesh_color[1]), float(mesh_color[2]), float(mesh_color[3])};
-    }
+    auto model_color = model->getColor().getAsVectorDouble();
+    std::vector<float> color = {float(model_color[0]), float(model_color[1]), float(model_color[2]), float(model_color[3])};
 
     paint(vertices, indices, color);
 }

src/graphics/opengl/OpenGlMeshPainter.h

@@ -5,14 +5,14 @@
 
 class DrawingContext;
 class OpenGlShaderProgram;
-class TriMesh;
+class SceneModel;
 
 class OpenGlMeshPainter
 {
 public:
     OpenGlMeshPainter();
 
-    void paint(TriMesh* mesh, DrawingContext* context);
+    void paint(SceneModel* model, DrawingContext* context);
 
 private:
     void initializeShader();

src/graphics/opengl/OpenGlPainter.cpp

@@ -3,6 +3,9 @@
 #include "DrawingContext.h"
 #include "DrawingSurface.h"
 #include "Scene.h"
+#include "SceneItem.h"
+#include "SceneModel.h"
+#include "SceneText.h"
 
 #include "TriMesh.h"
 
@@ -51,18 +54,19 @@ void OpenGlPainter::paint(DrawingContext* context)
     glClearColor(0.5, 0.5, 1.0, 0.0);
     glClear(GL_COLOR_BUFFER_BIT);
 
-    const auto num_mesh = context->getScene()->getNumMeshes();
-    for (std::size_t idx=0 ; idx< num_mesh; idx++)
+    for(unsigned idx=0; idx<context->getSurface()->getScene()->getNumItems(); idx++)
     {
-        auto mesh = context->getScene()->getMesh(idx);
-        mMeshPainter->paint(mesh, context);
+        auto scene_item = context->getSurface()->getScene()->getItem(idx);
+        if (scene_item->getType() == SceneItem::Type::MODEL)
+        {
+            mMeshPainter->paint(dynamic_cast<SceneModel*>(scene_item), context);
         }
-
-    auto text_data = context->getScene()->getTextData();
-    for (const auto& text_item : context->getScene()->getTextData())
+        else
         {
-        mTextPainter->paint(text_item, context);
+            mTextPainter->paint(dynamic_cast<SceneText*>(scene_item), context);
             break;
         }
+    }
+
     glFlush();
 }

src/graphics/opengl/OpenGlTextPainter.cpp

@@ -10,6 +10,8 @@
 #include "OpenGlShaderProgram.h"
 #include "TextData.h"
 
+#include "SceneText.h"
+
 #include "File.h"
 
 #ifdef _WIN32
@@ -69,7 +71,7 @@ void OpenGlTextPainter::initializeBuffers()
     glBindVertexArray(0);
 }
 
-void OpenGlTextPainter::paint(const TextData& textData, DrawingContext* context)
+void OpenGlTextPainter::paint(SceneText* text, DrawingContext* context)
 {
     if (!mShaderProgram)
     {
@@ -81,12 +83,15 @@ void OpenGlTextPainter::paint(const TextData& textData, DrawingContext* context)
         initializeBuffers();
     }
 
-    initializeTextures(textData, context);
+    auto text_data = text->getTextData();
+
+    initializeTextures(text_data, context);
 
     glEnable(GL_BLEND);
     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 
     glUseProgram(mShaderProgram->getHandle());
+
     glUniform3f(glGetUniformLocation(mShaderProgram->getHandle(), "textColor"), 0.0, 0.0, 0.0);
 
     const auto width = float(context->getSurface()->getWidth());
@@ -97,9 +102,11 @@ void OpenGlTextPainter::paint(const TextData& textData, DrawingContext* context)
     glActiveTexture(GL_TEXTURE0);
     glBindVertexArray(mVertexArray);
 
-    float x = textData.mLocation.GetX();
-    const float y = height - textData.mLocation.GetY();
-    for (auto c :  textData.mContent)
+    auto transform = text->getTransform();
+
+    float x = transform.getLocation().getX();
+    const float y = height - transform.getLocation().getY();
+    for (auto c :  text_data.mContent)
     {
         auto texture = mFontTextures[c].get();
 

src/graphics/opengl/OpenGlTextPainter.h

@@ -8,13 +8,14 @@ class OpenGlFontTexture;
 class OpenGlShaderProgram;
 
 class TextData;
+class SceneText;
 
 class OpenGlTextPainter
 {
 public:
     OpenGlTextPainter();
 
-    void paint(const TextData& textData, DrawingContext* context);
+    void paint(SceneText* text, DrawingContext* context);
 
 private:
     void initializeShader();

src/mesh/AbstractMesh.h

@@ -3,5 +3,15 @@
 class AbstractMesh
 {
 public:
-    virtual ~AbstractMesh() = default;
+
+    enum class MeshType
+    {
+        LINE,
+        TRI,
+        QUAD
+    };
+
+    virtual ~AbstractMesh() = default;
+
+    virtual MeshType getType() const = 0;
 };

src/mesh/TriMesh.h

@@ -59,6 +59,11 @@ public:
 
     std::vector<double> getVectorAttribute(const std::string& tag) const;
 
+    MeshType getType() const
+    {
+        return MeshType::TRI;
+    }
+
 private:
     std::unordered_map<std::string, std::vector<double> > mVectorAttributes;
     VecNodes mNodes;

src/ui_elements/desktop_elements/Window.cpp

@@ -5,9 +5,10 @@
 #include "KeyboardEvent.h"
 
 #include "Widget.h"
-#include "VisualLayer.h"
 #include "Scene.h"
 #include "TriMesh.h"
+#include "RootNode.h"
+#include "TransformNode.h"
 #include "AbstractPainter.h"
 
 #include "DrawingContext.h"
@@ -119,7 +120,10 @@ void Window::doPaint(mt::Screen* screen)
     {
         mPlatformWindow->beforePaint(screen);
 
-        mDrawingContext->getScene()->syncLayers(mWidget->getLayers());
+        if (mScene && mScene->getRootNode()->getNumChildren() == 0)
+        {
+            mScene->getRootNode()->addChild(mWidget->getRootNode());
+        }
 
         mDrawingContext->paint();
 

src/ui_elements/widgets/Button.cpp

@@ -2,7 +2,8 @@
 
 #include "TextNode.h"
 #include "GeometryNode.h"
-#include "VisualLayer.h"
+#include "TransformNode.h"
+
 #include "MouseEvent.h"
 
 #include <iostream>
@@ -32,7 +33,7 @@ void Button::setLabel(const std::string& text)
     if (text != mLabel)
     {
         mLabel = text;
-        mDirty = true;
+        mContentDirty = true;
     }
 }
 
@@ -53,36 +54,36 @@ void Button::onMyMouseEvent(const MouseEvent* event)
     }
 }
 
-void Button::onPaintEvent(const PaintEvent* event)
+bool Button::isDirty() const
 {
-    if (!needsUpdate())
-    {
-        return;
+    return Widget::isDirty() || mContentDirty;
 }
-    mLayers.clear();
 
-    if (mDirty)
+void Button::doPaint(const PaintEvent* event)
 {
-        mMyLayers.clear();
-        if(!mVisible)
-        {
-            return;
+    updateBackground(event);
+    updateLabel(event);
 }
-        addBackground(event);
 
-        if(!mLabel.empty())
+void Button::updateLabel(const PaintEvent* event)
 {
     unsigned fontOffset = unsigned(mLabel.size()) * 4;
     auto middle = DiscretePoint(mLocation.GetX() + mSize.mWidth/2 - fontOffset, mLocation.GetY() + mSize.mHeight/2 + 4);
 
-            auto textLayer = VisualLayer::Create();
-            auto node = TextNode::Create(mLabel, middle);
-            node->setFillColor(mBackgroundColor);
-            textLayer->setTextNode(std::move(node));
-            mMyLayers.push_back(std::move(textLayer));
-        }
-        mDirty = false;
-        addMyLayers();
+    if (!mTextNode)
+    {
+        mTextNode = TextNode::Create(mLabel, middle);
+        mRootNode->addChild(mTextNode.get());
     }
 
+    if (mMaterialDirty)
+    {
+        mTextNode->setFillColor(mBackgroundColor);
+    }
+
+    if (mContentDirty)
+    {
+        mTextNode->setContent(mLabel);
+        mContentDirty = false;
+    }
 }

src/ui_elements/widgets/Button.h

@@ -8,6 +8,7 @@
 
 class PaintEvent;
 class MouseEvent;
+class TextNode;
 
 class Button : public Widget
 {
@@ -25,13 +26,19 @@ public:
 protected:
     void onMyMouseEvent(const MouseEvent* event) override;
 
-    void onPaintEvent(const PaintEvent* event) override;
+    bool isDirty() const override;
+    void doPaint(const PaintEvent* event) override;
+
+    void updateLabel(const PaintEvent* event);
 
 private:
     std::string mLabel;
     clickFunc mClickFunc;
     Color mCachedColor;
     Color mClickedColor;
+
+    std::unique_ptr<TextNode> mTextNode;
+    bool mContentDirty{true};
 };
 
 using ButtonUPtr = std::unique_ptr<Button>;

src/ui_elements/widgets/HorizontalSpacer.cpp

@@ -27,7 +27,7 @@ void HorizontalSpacer::addWidgetWithScale(WidgetUPtr widget, double scale)
     mScales.push_back(scale);
 }
 
-void HorizontalSpacer::addChildLayers(const PaintEvent* event)
+void HorizontalSpacer::updateChildLocations()
 {
     double scaleSum  = std::accumulate(mScales.begin(), mScales.end(), 0.0);
     double offset = 0;
@@ -49,20 +49,6 @@ void HorizontalSpacer::addChildLayers(const PaintEvent* event)
         }
         child->setBounds(mSize.mWidth, unsigned(delta));
         child->setLocation(DiscretePoint(mLocation.GetX(), mLocation.GetY() + unsigned(offset)));
-        child->onPaintEvent(event);
-        auto layers = child->getLayers();
-        mLayers.insert(mLayers.end(), layers.begin(), layers.end());
         offset += delta;
     }
 }
-
-void HorizontalSpacer::onPaintEvent(const PaintEvent* event)
-{
-    if (!needsUpdate())
-    {
-        return;
-    }
-    mLayers.clear();
-
-    addChildLayers(event);
-}

src/ui_elements/widgets/HorizontalSpacer.h

@@ -5,8 +5,6 @@
 
 class HorizontalSpacer : public Widget
 {
-    std::vector<double> mScales;
-
 public:
     HorizontalSpacer();
 
@@ -15,10 +13,9 @@ public:
     void addWidget(WidgetUPtr widget) override;
 
     void addWidgetWithScale(WidgetUPtr widget, double scale);
-
-    void addChildLayers(const PaintEvent* event) override;
-
-    void onPaintEvent(const PaintEvent* event) override;
+private:
+    void updateChildLocations() override;
+    std::vector<double> mScales;
 };
 
 using HorizontalSpacerUPtr = std::unique_ptr<HorizontalSpacer>;

src/ui_elements/widgets/Label.cpp

@@ -1,8 +1,8 @@
 #include "Label.h"
 
 #include "TextNode.h"
+#include "TransformNode.h"
 #include "GeometryNode.h"
-#include "VisualLayer.h"
 
 Label::Label()
     : Widget(),
@@ -21,36 +21,40 @@ void Label::setLabel(const std::string& text)
     if (text != mLabel)
     {
         mLabel = text;
-        mDirty = true;
+        mContentDirty = true;
     }
 }
 
-void Label::onPaintEvent(const PaintEvent* event)
+bool Label::isDirty() const
 {
-    if (!needsUpdate())
-    {
-        return;
-    }
-    mLayers.clear();
-
-    if (mDirty)
-    {
-        mMyLayers.clear();
-        if(!mVisible)
-        {
-            return;
+    return Widget::isDirty() || mContentDirty;
 }
 
-        if(!mLabel.empty())
+void Label::doPaint(const PaintEvent* event)
+{
+    updateBackground(event);
+    updateLabel(event);
+}
+
+void Label::updateLabel(const PaintEvent* event)
 {
     unsigned fontOffset = unsigned(mLabel.size()) * 4;
     auto middle = DiscretePoint(mLocation.GetX() + mSize.mWidth/2 - fontOffset, mLocation.GetY() + mSize.mHeight/2 + 4);
-            auto textLayer = VisualLayer::Create();
-            auto textElement = TextNode::Create(mLabel, middle);
-            textElement->setFillColor(mBackgroundColor);
-            textLayer->setTextNode(std::move(textElement));
-            mMyLayers.push_back(std::move(textLayer));
+
+    if (!mTextNode)
+    {
+        mTextNode = TextNode::Create(mLabel, middle);
+        mRootNode->addChild(mTextNode.get());
     }
-        addMyLayers();
+
+    if (mMaterialDirty)
+    {
+        mTextNode->setFillColor(mBackgroundColor);
+    }
+
+    if (mContentDirty)
+    {
+        mTextNode->setContent(mLabel);
+        mContentDirty = false;
     }
 }

src/ui_elements/widgets/Label.h

@@ -4,6 +4,8 @@
 
 #include <string>
 
+class TextNode;
+
 class Label : public Widget
 {
 
@@ -11,14 +13,21 @@ public:
 
     Label();
 
+    virtual ~Label() = default;
+
     static std::unique_ptr<Label> Create();
 
     void setLabel(const std::string& text);
 
-    void onPaintEvent(const PaintEvent* event) override;
-
 private:
+    bool isDirty() const override;
+    void doPaint(const PaintEvent* event) override;
+
+    void updateLabel(const PaintEvent* event);
+
     std::string mLabel;
+    std::unique_ptr<TextNode> mTextNode;
+    bool mContentDirty{true};
 
 };
 

src/ui_elements/widgets/TextBox.cpp

@@ -1,9 +1,9 @@
 #include "TextBox.h"
 
 #include "TextNode.h"
-#include "VisualLayer.h"
 #include "GeometryNode.h"
 #include "KeyboardEvent.h"
+#include "TransformNode.h"
 
 #include <sstream>
 
@@ -24,6 +24,7 @@ std::unique_ptr<TextBox> TextBox::Create()
 void TextBox::setContent(const std::string& text)
 {
     mContent = text;
+    mContentDirty = true;
 }
 
 std::string TextBox::getContent() const
@@ -34,6 +35,7 @@ std::string TextBox::getContent() const
 void TextBox::appendContent(const std::string& text)
 {
     mContent += text;
+    mContentDirty = true;
 }
 
 bool TextBox::onMyKeyboardEvent(const KeyboardEvent* event)
@@ -72,6 +74,7 @@ bool TextBox::onMyKeyboardEvent(const KeyboardEvent* event)
     return true;
 }
 
+/*
 void TextBox::onPaintEvent(const PaintEvent* event)
 {
     mMyLayers.clear();
@@ -101,3 +104,38 @@ void TextBox::onPaintEvent(const PaintEvent* event)
     }
     addMyLayers();
 }
+*/
+
+bool TextBox::isDirty() const
+{
+    return Widget::isDirty() || mContentDirty;
+}
+
+void TextBox::doPaint(const PaintEvent* event)
+{
+    updateBackground(event);
+    updateLabel(event);
+}
+
+void TextBox::updateLabel(const PaintEvent* event)
+{
+    unsigned fontOffset = unsigned(mContent.size()) * 4;
+    auto middle = DiscretePoint(mLocation.GetX() + mSize.mWidth/2 - fontOffset, mLocation.GetY() + mSize.mHeight/2 + 4);
+
+    if (!mTextNode)
+    {
+        mTextNode = TextNode::Create(mContent, middle);
+        mRootNode->addChild(mTextNode.get());
+    }
+
+    if (mMaterialDirty)
+    {
+        mTextNode->setFillColor(mBackgroundColor);
+    }
+
+    if (mContentDirty)
+    {
+        mTextNode->setContent(mContent);
+        mContentDirty = false;
+    }
+}

src/ui_elements/widgets/TextBox.h

@@ -4,6 +4,8 @@
 
 #include <string>
 
+class TextNode;
+
 class TextBox : public Widget
 {
 public:
@@ -17,12 +19,19 @@ public:
 
     void appendContent(const std::string& text);
 
-    void onPaintEvent(const PaintEvent* event) override;
+    //void onPaintEvent(const PaintEvent* event) override;
 
     bool onMyKeyboardEvent(const KeyboardEvent* event) override;
 
 private:
+    bool isDirty() const override;
+    void doPaint(const PaintEvent* event) override;
+
+    void updateLabel(const PaintEvent* event);
+
     std::string mContent;
+    std::unique_ptr<TextNode> mTextNode;
+    bool mContentDirty{true};
     bool mCaps;
 };
 

src/ui_elements/widgets/VerticalSpacer.cpp

@@ -26,9 +26,8 @@ void VerticalSpacer::AddWidgetWithScale(WidgetUPtr widget, double scale)
     mScales.push_back(scale);
 }
 
-void VerticalSpacer::addChildLayers(const PaintEvent* event)
+void VerticalSpacer::updateChildLocations()
 {
-    mLayers.clear();
     double scaleSum  = std::accumulate(mScales.begin(), mScales.end(), 0.0);
     double offset = 0;
     unsigned delta = mSize.mWidth / unsigned(mChildren.size());
@@ -39,14 +38,7 @@ void VerticalSpacer::addChildLayers(const PaintEvent* event)
         double delta = mSize.mWidth * (scale/scaleSum);
         child->setBounds(unsigned(delta), mSize.mHeight);
         child->setLocation(DiscretePoint(mLocation.GetX() + unsigned(offset), mLocation.GetY()));
-        child->onPaintEvent(event);
-        auto layers = child->getLayers();
-        mLayers.insert(mLayers.end(), layers.begin(), layers.end());
         offset += delta;
     }
 }
 
-void VerticalSpacer::onPaintEvent(const PaintEvent* event)
-{
-    addChildLayers(event);
-}

src/ui_elements/widgets/VerticalSpacer.h

@@ -4,7 +4,6 @@
 
 class VerticalSpacer : public Widget
 {
-    std::vector<double> mScales;
 
 public:
     VerticalSpacer();
@@ -15,9 +14,9 @@ public:
 
     void AddWidgetWithScale(WidgetUPtr widget, double scale);
 
-    void addChildLayers(const PaintEvent* event) override;
-
-    void onPaintEvent(const PaintEvent* event) override;
+private:
+    void updateChildLocations() override;
+    std::vector<double> mScales;
 };
 
 using VerticalSpacerUPtr = std::unique_ptr<VerticalSpacer>;

src/ui_elements/widgets/Widget.cpp

@@ -4,9 +4,11 @@
 #include "MouseEvent.h"
 #include "KeyboardEvent.h"
 #include "PaintEvent.h"
-#include "VisualLayer.h"
+
+#include "AbstractVisualNode.h"
 #include "TextNode.h"
-#include "Color.h"
+#include "TransformNode.h"
+#include "RootNode.h"
 
 #include <algorithm>
 #include <iterator>
@@ -17,8 +19,7 @@ Widget::Widget()
       mSize({100, 0, 0, 100, 0, 0}),
       mPadding(),
       mMargin(),
-      mMyLayers(),
-      mLayers(),
+      mRootNode(std::make_unique<TransformNode>()),
       mChildren(),
       mBorderThickness(0),
       mBackgroundColor(Color(255, 255, 255)),
@@ -40,6 +41,7 @@ std::unique_ptr<Widget> Widget::Create()
 
 void Widget::addWidget(WidgetUPtr widget)
 {
+    mPendingChildNodes.push_back(widget->getRootNode());
     mChildren.push_back(std::move(widget));
 }
 
@@ -53,9 +55,9 @@ const DiscretePoint& Widget::getLocation() const
     return mLocation;
 }
 
-std::vector<VisualLayer*> Widget::getLayers() const
+TransformNode* Widget::getRootNode() const
 {
-    return mLayers;
+    return mRootNode.get();
 }
 
 void Widget::setSize(const BoundedSize& size)
@@ -63,7 +65,7 @@ void Widget::setSize(const BoundedSize& size)
     if (size != mSize)
     {
         mSize = size;
-        mDirty = true;
+        mTransformDirty = true;
     }
 }
 
@@ -77,7 +79,7 @@ void Widget::setMargin(const BoundaryOffset& margin)
     if (margin != mMargin)
     {
         mMargin = margin;
-        mDirty = true;
+        mTransformDirty = true;
     }
 }
 
@@ -91,7 +93,7 @@ void Widget::setPadding(const BoundaryOffset& padding)
     if (padding != mPadding)
     {
         mPadding = padding;
-        mDirty = true;
+        mTransformDirty = true;
     }
 }
 
@@ -99,7 +101,7 @@ void Widget::setBounds(unsigned width, unsigned height)
 {
     if (width != mSize.mWidth || height != mSize.mHeight)
     {
-        mDirty = true;
+        mTransformDirty = true;
         mSize.mWidth = width;
         mSize.mHeight = height;
     }
@@ -110,7 +112,7 @@ void Widget::setBackgroundColor(const Color& color)
     if (mBackgroundColor != color)
     {
         mBackgroundColor = std::move(color);
-        mDirty = true;
+        mMaterialDirty = true;
     }
 }
 
@@ -119,7 +121,7 @@ void Widget::setLocation(const DiscretePoint& loc)
     if (mLocation != loc)
     {
         mLocation = loc;
-        mDirty = true;
+        mTransformDirty = true;
     }
 }
 
@@ -127,35 +129,19 @@ void Widget::setVisible(bool visible)
 {
     if (mVisible != visible)
     {
-        mDirty = true;
+        mVisibilityDirty = true;
     }
     mVisible = visible;
-
 }
 
-void Widget::addMyLayers()
+bool Widget::isDirty() const
 {
-    mLayers.clear();
-    mLayers.reserve(mMyLayers.size());
-    auto getRaw = [](const VisualLayerUPtr& uptr){return uptr.get();};
-    std::transform(mMyLayers.begin(), mMyLayers.end(), std::back_inserter(mLayers), getRaw);
-}
-
-void Widget::addChildLayers(const PaintEvent* event)
-{
-    for(auto& child: mChildren)
-    {
-        child->setBounds(mSize.mWidth, mSize.mHeight);
-        child->setLocation(mLocation);
-        child->onPaintEvent(event);
-        const auto layers = child->getLayers();
-        mLayers.insert(mLayers.end(), layers.begin(), layers.end());
-    }
+    return mTransformDirty || mMaterialDirty || mVisibilityDirty || mPendingChildNodes.size() > 0;
 }
 
 bool Widget::needsUpdate() const
 {
-    if (mDirty)
+    if (isDirty())
     {
         return true;
     }
@@ -169,26 +155,48 @@ bool Widget::needsUpdate() const
     return false;
 }
 
+void Widget::doPaint(const PaintEvent* event)
+{
+    updateBackground(event);
+}
+
 void Widget::onPaintEvent(const PaintEvent* event)
 {
     if (!needsUpdate())
     {
         return;
     }
-    mLayers.clear();
 
-    if (mDirty)
+    if (isDirty())
     {
-        mMyLayers.clear();
-        if(!mVisible)
+        doPaint(event);
+
+        mTransformDirty = false;
+        mMaterialDirty = false;
+        mVisibilityDirty = false;
+    }
+
+    for (auto node : mPendingChildNodes)
     {
-            return;
+        mRootNode->addChild(node);
     }
-        addBackground(event);
-        mDirty = false;
+    mPendingChildNodes.clear();
+
+    updateChildLocations();
+
+    for(auto& child: mChildren)
+    {
+        child->onPaintEvent(event);
+    }
+}
+
+void Widget::updateChildLocations()
+{
+    for(auto& child: mChildren)
+    {
+        child->setBounds(mSize.mWidth, mSize.mHeight);
+        child->setLocation(mLocation);
     }
-    addMyLayers();
-    addChildLayers(event);
 }
 
 bool Widget::contains(const DiscretePoint& loc) const
@@ -267,16 +275,32 @@ void Widget::onMyMouseEvent(const MouseEvent* event)
 
 }
 
-void Widget::addBackground(const PaintEvent* event)
+void Widget::updateBackground(const PaintEvent* event)
 {
     unsigned locX = mLocation.GetX() + mMargin.mLeft;
     unsigned locY = mLocation.GetY() + mMargin.mTop;
     unsigned deltaX = mSize.mWidth - mMargin.mLeft - mMargin.mRight;
     unsigned deltaY = mSize.mHeight - mMargin.mTop - mMargin.mBottom;
 
-    auto node = RectangleNode::Create(DiscretePoint(locX, locY), deltaX, deltaY);
-    node->setFillColor(mBackgroundColor);
-    auto layer = VisualLayer::Create();
-    layer->setShapeNode(std::move(node));
-    mMyLayers.push_back(std::move(layer));
+    if (!mBackgroundNode)
+    {
+        mRootNode->addChild(mBackgroundNode.get());
+    }
+
+    if (mTransformDirty)
+    {
+        mBackgroundNode->setWidth(deltaX);
+        mBackgroundNode->setHeight(deltaY);
+        mBackgroundNode->setLocation(DiscretePoint(locX, locY));
+    }
+
+    if (mMaterialDirty)
+    {
+        mBackgroundNode->setFillColor(mBackgroundColor);
+    }
+
+    if (mVisibilityDirty)
+    {
+        mBackgroundNode->setIsVisible(mVisible);
+    }
 }

src/ui_elements/widgets/Widget.h

@@ -10,7 +10,9 @@ class MouseEvent;
 class KeyboardEvent;
 class PaintEvent;
 
-class VisualLayer;
+class AbstractVisualNode;
+class TransformNode;
+class RectangleNode;
 
 class Widget
 {
@@ -71,7 +73,7 @@ public:
 
     BoundedSize getSize() const;
 
-    std::vector<VisualLayer*> getLayers() const;
+    TransformNode* getRootNode() const;
 
     const DiscretePoint& getLocation() const;
 
@@ -106,27 +108,38 @@ protected:
 
     virtual void onMyMouseEvent(const MouseEvent* event);
 
-    virtual void addChildLayers(const PaintEvent* event);
+    virtual void updateBackground(const PaintEvent* event);
 
-    virtual void addBackground(const PaintEvent* event);
+    virtual void doPaint(const PaintEvent* event);
+
+    virtual void updateChildLocations();
 
     void addMyLayers();
 
     bool needsUpdate() const;
 
 protected:
+    virtual bool isDirty() const;
+
     DiscretePoint mLocation;
     BoundedSize mSize;
     BoundaryOffset mPadding;
     BoundaryOffset mMargin;
-    std::vector<std::unique_ptr<VisualLayer> > mMyLayers;
-    std::vector<VisualLayer*> mLayers;
+
+    std::unique_ptr<TransformNode> mRootNode;
     std::vector<std::unique_ptr<Widget> > mChildren;
     unsigned mBorderThickness{0};
     Color mBackgroundColor;
     Color mBorderColor;
     bool mVisible{false};
-    bool mDirty{true};
+
+    std::unique_ptr<RectangleNode> mBackgroundNode;
+
+    bool mTransformDirty{true};
+    bool mMaterialDirty{true};
+    bool mVisibilityDirty{true};
+
+    std::vector<TransformNode*> mPendingChildNodes;
 };
 
 using WidgetUPtr = std::unique_ptr<Widget>;

src/visual_elements/AbstractVisualNode.h

@@ -1,6 +1,8 @@
 #pragma once
 
+#include "SceneModel.h"
 #include "AbstractMesh.h"
+
 #include "Image.h"
 #include "DiscretePoint.h"
 
@@ -19,9 +21,9 @@ public:
 
     virtual ~AbstractVisualNode() = default;
 
-    AbstractMesh* getMesh() const
+    SceneItem* getSceneItem() const
     {
-        return mMesh.get();
+        return mSceneItem.get();
     }
 
     virtual void update(FontsManager* fontsManager)
@@ -29,34 +31,43 @@ public:
 
     }
 
-    virtual void updateMesh()
-    {
-
-    }
-
-    virtual void updateTexture(FontsManager* fontsManager)
-    {
-
-    }
-
     Image<unsigned char>* getImage() const
     {
         return mImage.get();
     }
 
-    const DiscretePoint& getLocation() const
+    void syncChildren(const std::vector<AbstractVisualNode*>& children)
     {
-        return mLocation;
+        mChildren = children;
     }
 
-    Image<unsigned char>* getTexture() const
+    void addChild(AbstractVisualNode* child)
     {
-        return mTexture.get();
+        mChildren.push_back(child);
+    }
+
+    const std::vector<AbstractVisualNode*>& getChildren() const
+    {
+        return mChildren;
+    }
+
+    void setIsVisible(bool isVisible)
+    {
+        mIsVisible = isVisible;
+    }
+
+    unsigned getNumChildren() const
+    {
+        return mChildren.size();
     }
 
 protected:
     DiscretePoint mLocation;
-    std::unique_ptr<AbstractMesh> mMesh;
+    std::unique_ptr<SceneItem> mSceneItem;
     std::unique_ptr<Image<unsigned char> > mImage;
-    std::unique_ptr<Image<unsigned char> > mTexture;
+
+    std::vector<AbstractVisualNode*> mChildren;
+
+    bool mIsVisible{true};
+    bool mTransformIsDirty{true};
 };

src/visual_elements/CMakeLists.txt

@@ -1,9 +1,14 @@
 list(APPEND visual_elements_LIB_INCLUDES
     GeometryNode.cpp
     RectangleNode.cpp
+    MaterialNode.cpp
     TextNode.cpp
-    VisualLayer.cpp
     Scene.cpp
+    SceneModel.cpp
+    SceneItem.cpp
+    SceneText.cpp
+    Transform.cpp
+    Texture.cpp
 )
 
 add_library(visual_elements SHARED ${visual_elements_LIB_INCLUDES})

src/visual_elements/GeometryNode.cpp

@@ -1,41 +1,23 @@
 #include "GeometryNode.h"
 
 GeometryNode::GeometryNode(const DiscretePoint& location)
-    :   AbstractVisualNode(location),
-        mFillColor(Color(255, 255, 255)),
-        mStrokeColor(Color(0, 0, 0)),
+    :   MaterialNode(location),
         mStrokeThickness(1),
         mType(Type::Path)
 {
 
 }
 
-const Color& GeometryNode::getFillColor() const
-{
-    return mFillColor;
-}
-
-const Color& GeometryNode::getStrokeColor() const
-{
-    return mStrokeColor;
-}
-
 unsigned GeometryNode::getStrokeThickness() const
 {
     return mStrokeThickness;
 }
 
-void GeometryNode::setFillColor(const Color& color)
-{
-    mFillColor = color;
-}
-
-void GeometryNode::setStrokeColor(const Color&  color)
-{
-    mStrokeColor = std::move(color);
-}
-
 void GeometryNode::setStrokeThickness(unsigned thickness)
 {
+    if (mStrokeThickness != thickness)
+    {
+        mGeometryIsDirty = true;
         mStrokeThickness = thickness;
     }
+}

src/visual_elements/GeometryNode.h

@@ -1,9 +1,8 @@
 #pragma once
 
-#include "AbstractVisualNode.h"
-#include "Color.h"
+#include "MaterialNode.h"
 
-class GeometryNode : public AbstractVisualNode
+class GeometryNode : public MaterialNode
 {
 public:
     enum class Type
@@ -18,19 +17,16 @@ public:
     GeometryNode(const DiscretePoint& location);
     virtual ~GeometryNode() = default;
 
-    const Color& getFillColor() const;
-    const Color& getStrokeColor() const;
-    unsigned getStrokeThickness() const;
     virtual Type getType() = 0;
 
-    void setFillColor(const Color& color);
-    void setStrokeColor(const Color& color);
+    unsigned getStrokeThickness() const;
     void setStrokeThickness(unsigned thickness);
-private:
-    Color mFillColor;
-    Color mStrokeColor;
+
+protected:
     unsigned mStrokeThickness{0};
     Type mType;
+
+    bool mGeometryIsDirty{true};
 };
 
 using GeometryNodePtr = std::unique_ptr<GeometryNode>;

src/visual_elements/MaterialNode.cpp

@@ -0,0 +1,37 @@
+#include "MaterialNode.h"
+
+MaterialNode::MaterialNode(const DiscretePoint& location)
+    : AbstractVisualNode(location),
+        mFillColor(Color(255, 255, 255)),
+        mStrokeColor(Color(0, 0, 0))
+{
+
+}
+
+const Color& MaterialNode::getFillColor() const
+{
+    return mFillColor;
+}
+
+const Color& MaterialNode::getStrokeColor() const
+{
+    return mStrokeColor;
+}
+
+void MaterialNode::setFillColor(const Color& color)
+{
+    if (mFillColor != color)
+    {
+        mMaterialIsDirty = true;
+        mFillColor = color;
+    }
+}
+
+void MaterialNode::setStrokeColor(const Color&  color)
+{
+    if (mStrokeColor != color)
+    {
+        mMaterialIsDirty = true;
+        mStrokeColor = color;
+    }
+}

src/visual_elements/MaterialNode.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "AbstractVisualNode.h"
+
+#include "Color.h"
+
+class MaterialNode : public AbstractVisualNode
+{
+public:
+    MaterialNode(const DiscretePoint& location);
+
+    const Color& getFillColor() const;
+    const Color& getStrokeColor() const;
+
+    void setFillColor(const Color& color);
+    void setStrokeColor(const Color& color);
+
+protected:
+    Color mFillColor;
+    Color mStrokeColor;
+    bool mMaterialIsDirty{true};
+};

src/visual_elements/RectangleNode.cpp

@@ -1,6 +1,7 @@
 #include "RectangleNode.h"
 
 #include "Rectangle.h"
+
 #include "MeshPrimitives.h"
 
 #include <iostream>
@@ -33,18 +34,60 @@ unsigned RectangleNode::getHeight() const
     return mHeight;
 }
 
+void RectangleNode::setWidth(unsigned width)
+{
+    if (mWidth != width)
+    {
+        mTransformIsDirty = true;
+        mWidth = width;
+    }
+}
+
+void RectangleNode::setHeight(unsigned height)
+{
+    if (mHeight != height)
+    {
+        mTransformIsDirty = true;
+        mHeight = height;
+    }
+}
+
+void RectangleNode::setLocation(const DiscretePoint& loc)
+{
+    if (mLocation != loc)
+    {
+        mTransformIsDirty = true;
+        mLocation = loc;
+    }
+}
+
 void RectangleNode::update(FontsManager* fontsManager)
 {
-    updateMesh();
-}
-
-void RectangleNode::updateMesh()
+    if (!mSceneItem || mGeometryIsDirty)
     {
-    const auto rect = Rectangle(mLocation, mWidth, mHeight);
-
+        const auto rect = Rectangle(Point(), 1, 1);
         auto mesh = MeshPrimitives::build(rect);
-    auto color = getFillColor();
 
-    mesh->addVectorAttribute("Color", color.getAsVectorDouble());
-    mMesh = std::move(mesh);
+        if (!mSceneItem)
+        {
+            mSceneItem = std::make_unique<SceneModel>(std::move(mesh));
+        }
+        else
+        {
+            dynamic_cast<SceneModel*>(mSceneItem.get())->updateMesh(std::move(mesh));
+        }
+        mGeometryIsDirty = false;
+    }
+
+    if (mTransformIsDirty)
+    {
+        mSceneItem->updateTransform({mLocation, static_cast<double>(mWidth), static_cast<double>(mHeight)});
+        mTransformIsDirty = false;
+    }
+
+    if (mMaterialIsDirty)
+    {
+        mSceneItem->updateUniformColor(mFillColor);
+        mMaterialIsDirty = false;
+    }
 }

src/visual_elements/RectangleNode.h

@@ -15,10 +15,12 @@ public:
     unsigned getWidth() const;
     unsigned getHeight() const;
 
-    void update(FontsManager* fontsManager) override;
+    void setWidth(unsigned width);
+    void setHeight(unsigned height);
+    void setLocation(const DiscretePoint& loc);
 
+    void update(FontsManager* fontsManager) override;
 private:
-    void updateMesh() override;
     unsigned mWidth{1};
     unsigned mHeight{1};
 };

src/visual_elements/RootNode.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "AbstractVisualNode.h"
+
+class RootNode : public AbstractVisualNode
+{
+public:
+    RootNode()
+        : AbstractVisualNode(DiscretePoint(0, 0))
+    {
+
+    }
+
+};

src/visual_elements/Scene.cpp

@@ -1,72 +1,42 @@
 #include "Scene.h"
 
-#include "VisualLayer.h"
-#include "GeometryNode.h"
-#include "RectangleNode.h"
-#include "TextNode.h"
+#include "RootNode.h"
+#include "FontsManager.h"
+#include "SceneItem.h"
 
-#include "MeshBuilder.h"
-#include "TriMesh.h"
-
-#include "Image.h"
-
-void Scene::syncLayers(const std::vector<VisualLayer*>& layers)
+Scene::Scene()
+    : mRootNode(std::make_unique<RootNode>())
 {
-    mLayers = layers;
+
 }
 
-void Scene::update(FontsManager* fontsManager, Image<unsigned char>* image)
+void Scene::update(FontsManager* fontsManager)
 {
-    if (image)
-    {
-        //
+    updateNode(mRootNode.get(), fontsManager);
 }
-    else
+
+void Scene::updateNode(AbstractVisualNode* node, FontsManager* fontsManager)
 {
-        mWorkingMeshs.clear();
-        for(auto layer : mLayers)
-        {
-            if (layer->hasShapeNode())
-            {
-                auto node = layer->getShapeNode();
-                if (layer->getIsDirty())
+    for (auto child : node->getChildren())
     {
+        updateNode(child, fontsManager);
+    }
+
     node->update(fontsManager);
-                    layer->setIsDirty(false);
-                }
-                mWorkingMeshs.push_back(dynamic_cast<TriMesh*>(node->getMesh()));
-                mTextures.push_back(nullptr);
-            }
-            else
-            {
-                auto node = dynamic_cast<TextNode*>(layer->getTextNode());
-                if (layer->getIsDirty())
-                {
-                    node->update(fontsManager);
-                    layer->setIsDirty(false);
-                }
-                mTextData.push_back(node->getTextData());
-            }
-        }
-    }
+    mSceneItems.push_back(node->getSceneItem());
 }
 
-const std::vector<TextData>& Scene::getTextData() const
+RootNode* Scene::getRootNode() const
 {
-    return mTextData;
+    return mRootNode.get();
 }
 
-void Scene::processRectangleNode(RectangleNode* node)
+unsigned Scene::getNumItems() const
 {
-
+    return mSceneItems.size();
 }
 
-unsigned Scene::getNumMeshes() const
+SceneItem* Scene::getItem(std::size_t idx) const
 {
-    return mWorkingMeshs.size();
-}
-
-TriMesh* Scene::getMesh(std::size_t idx) const
-{
-    return mWorkingMeshs[idx];
+    return mSceneItems[idx];
 }

src/visual_elements/Scene.h

@@ -5,39 +5,25 @@
 #include <vector>
 #include <memory>
 
-class VisualLayer;
-class TriMesh;
+class RootNode;
+class AbstractVisualNode;
+class SceneItem;
 class FontsManager;
 
-class RectangleNode;
-
-template <typename T>
-class Image;
-
 class Scene
 {
 public:
+    Scene();
 
-    Scene() = default;
+    void update(FontsManager* fontsManager);
 
-    void syncLayers(const std::vector<VisualLayer*>& layers);
+    unsigned getNumItems() const;
 
-    void update(FontsManager* fontsManager, Image<unsigned char>* image = nullptr);
-
-    unsigned getNumMeshes() const;
-
-    TriMesh* getMesh(std::size_t idx) const;
-
-    Image<unsigned char>* getTexture(std::size_t idx) const;
-
-    const std::vector<TextData>& getTextData() const;
+    SceneItem* getItem(std::size_t idx) const;
 
+    RootNode* getRootNode() const;
 private:
-    void processRectangleNode(RectangleNode* node);
-
-    std::vector<VisualLayer*> mLayers;
-    std::vector<TriMesh*> mWorkingMeshs;
-    std::vector<Image<unsigned char>* >  mTextures;
-
-    std::vector<TextData> mTextData;
+    void updateNode(AbstractVisualNode* node, FontsManager* fontsManager);
+    std::unique_ptr<RootNode> mRootNode;
+    std::vector<SceneItem*> mSceneItems;
 };

src/visual_elements/SceneItem.cpp

@@ -0,0 +1,45 @@
+#include "SceneItem.h"
+
+SceneItem::SceneItem()
+{
+
+}
+
+const Color& SceneItem::getColor() const
+{
+    return mUniformColor;
+}
+
+const Transform& SceneItem::getTransform() const
+{
+    return mTransform;
+}
+
+bool SceneItem::isVisible() const
+{
+    return mIsVisible;
+}
+
+
+void SceneItem::setIsVisible(bool isVisible)
+{
+    mIsVisible = isVisible;
+}
+
+void SceneItem::updateUniformColor(const Color& color)
+{
+    if (mUniformColor != color)
+    {
+        mColorIsDirty = true;
+        mUniformColor = color;
+    }
+}
+
+void SceneItem::updateTransform(const Transform& transform)
+{
+    if (mTransform != transform)
+    {
+        mTransformIsDirty = true;
+        mTransform = transform;
+    }
+}

src/visual_elements/SceneItem.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include "Color.h"
+#include "Transform.h"
+
+class SceneItem
+{
+public:
+
+    enum class Type
+    {
+        MODEL,
+        TEXT
+    };
+
+    SceneItem();
+
+    virtual ~SceneItem() = default;
+
+    const Color& getColor() const;
+
+    const Transform& getTransform() const;
+
+    virtual Type getType() const = 0;
+
+    bool isVisible() const;
+
+    void setIsVisible(bool isVisible);
+
+    void updateUniformColor(const Color& color);
+
+    void updateTransform(const Transform& transform);
+
+protected:
+    Transform mTransform;
+    Color mUniformColor;
+
+    bool mColorIsDirty{true};
+    bool mTransformIsDirty{true};
+    bool mIsVisible{true};
+};

src/visual_elements/SceneModel.cpp

@@ -0,0 +1,26 @@
+#include "SceneModel.h"
+
+#include "AbstractMesh.h"
+
+SceneModel::SceneModel(std::unique_ptr<AbstractMesh> mesh)
+    : SceneItem(),
+      mMesh(std::move(mesh))
+{
+
+}
+
+AbstractMesh* SceneModel::getMesh() const
+{
+    return mMesh.get();
+}
+
+void SceneModel::updateMesh(std::unique_ptr<AbstractMesh> mesh)
+{
+    mMesh = std::move(mesh);
+    mMeshIsDirty = true;
+}
+
+SceneItem::Type SceneModel::getType() const
+{
+    return SceneItem::Type::MODEL;
+}

src/visual_elements/SceneModel.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include "SceneItem.h"
+#include "Texture.h"
+
+#include <vector>
+#include <string>
+#include <unordered_map>
+#include <memory>
+
+class AbstractMesh;
+//class Texture;
+
+class SceneModel : public SceneItem
+{
+public:
+    SceneModel(std::unique_ptr<AbstractMesh> mesh);
+
+    AbstractMesh* getMesh() const;
+
+    void updateMesh(std::unique_ptr<AbstractMesh> mesh);
+
+    Type getType() const override;
+
+private:
+    std::unique_ptr<AbstractMesh> mMesh;
+    std::unique_ptr<Texture> mColorMap;
+
+    bool mMeshIsDirty{true};
+    bool mColorMapIsDirty{true};
+};

src/visual_elements/SceneText.cpp

@@ -0,0 +1,25 @@
+#include "SceneText.h"
+
+SceneText::SceneText()
+{
+    mTextData.mFont = FontItem("Arial", 16);
+}
+
+SceneItem::Type SceneText::getType() const
+{
+    return SceneItem::Type::TEXT;
+}
+
+const TextData& SceneText::getTextData() const
+{
+    return mTextData;
+}
+
+void SceneText::setContent(const std::string& content)
+{
+    if (mTextData.mContent != content)
+    {
+        mTextGeometryIsDirty = true;
+        mTextData.mContent = content;
+    }
+}

src/visual_elements/SceneText.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "SceneItem.h"
+#include "TextData.h"
+
+class SceneText : public SceneItem
+{
+public:
+    SceneText();
+
+    Type getType() const override;
+
+    const TextData& getTextData() const;
+
+    void setContent(const std::string& content);
+
+private:
+    bool mTextGeometryIsDirty{true};
+    TextData mTextData;
+};

src/visual_elements/TextData.h

@@ -1,6 +1,5 @@
 #pragma once
 
-#include "DiscretePoint.h"
 #include "Color.h"
 #include "FontItem.h"
 
@@ -8,9 +7,6 @@ class TextData
 {
 public:
     TextData() = default;
-    DiscretePoint mLocation;
     std::string mContent;
-    Color mFillColor;
-    Color mStrokeColor;
     FontItem mFont;
 };

src/visual_elements/TextNode.cpp

@@ -6,16 +6,14 @@
 #include "MeshPrimitives.h"
 #include "FontItem.h"
 
+#include "SceneText.h"
+
 #include "Color.h"
 
 TextNode::TextNode(const std::string& content, const DiscretePoint& loc)
-    :   AbstractVisualNode(loc)
+    :   MaterialNode(loc)
 {
-    mTextData.mContent = content;
-    mTextData.mFont = FontItem("Arial", 16);
-    mTextData.mLocation = loc;
-    mTextData.mFillColor = Color(255, 255, 255);
-    mTextData.mStrokeColor = Color(0, 0, 0);
+    mContent= content;
 }
 
 TextNode::~TextNode()
@@ -28,15 +26,6 @@ std::unique_ptr<TextNode> TextNode::Create(const std::string& content, const Dis
     return std::make_unique<TextNode>(content, loc);
 }
 
-const Color&  TextNode::getFillColor() const
-{
-    return mTextData.mFillColor;
-}
-const Color&  TextNode::getStrokeColor() const
-{
-    return mTextData.mStrokeColor;
-}
-
 std::string TextNode::getFontLabel() const
 {
     return {};
@@ -44,41 +33,40 @@ std::string TextNode::getFontLabel() const
 
 std::string TextNode::getContent() const
 {
-    return mTextData.mContent;
+    return mContent;
 }
 
 void TextNode::setContent(const std::string& content)
 {
-    mTextData.mContent = content;
-}
-
-void TextNode::setFillColor(const Color& color)
+    if (mContent != content)
     {
-    mTextData.mFillColor = color;
+        mContent = content;
+        mContentIsDirty = true;
+    }
 }
 
-void TextNode::setStrokeColor(const Color& color)
+void TextNode::update(FontsManager* fontsManager)
 {
-    mTextData.mStrokeColor = color;
-}
-
-void TextNode::update(FontsManager* drawingManager)
+    if (!mSceneItem)
     {
-    updateMesh();
-    updateTexture(drawingManager);
+        mSceneItem = std::make_unique<SceneText>();
     }
 
-const TextData& TextNode::getTextData() const
+    if (!mContentIsDirty)
     {
-    return mTextData;
+        dynamic_cast<SceneText*>(mSceneItem.get())->setContent(mContent);
+        mContentIsDirty = false;
     }
 
-void TextNode::updateMesh()
+    if (mTransformIsDirty)
     {
-
+        mSceneItem->updateTransform({mLocation});
+        mTransformIsDirty = false;
     }
 
-void TextNode::updateTexture(FontsManager* fontsManager)
+    if (mMaterialIsDirty)
     {
-
+        mSceneItem->updateUniformColor(mFillColor);
+        mMaterialIsDirty = false;
+    }
 }

src/visual_elements/TextNode.h

@@ -1,16 +1,14 @@
 #pragma once
 
-#include "DiscretePoint.h"
+#include "MaterialNode.h"
 
-#include "AbstractVisualNode.h"
-#include "Color.h"
 #include "FontItem.h"
 #include "TextData.h"
 
 #include <memory>
 #include <string>
 
-class TextNode : public AbstractVisualNode
+class TextNode : public MaterialNode
 {
 public:
     TextNode(const std::string& content, const DiscretePoint& loc);
@@ -19,25 +17,15 @@ public:
 
     static std::unique_ptr<TextNode> Create(const std::string& content, const DiscretePoint& loc);
 
-    const Color& getFillColor() const;
-    const Color& getStrokeColor() const;
-
     std::string getContent() const;
     std::string getFontLabel() const;
 
-    const TextData& getTextData() const;
-
     void setContent(const std::string& content);
-    void setFillColor(const Color& color);
-    void setStrokeColor(const Color& color);
 
     void update(FontsManager* fontsManager) override;
-
 private:
-    void updateMesh() override;
-    void updateTexture(FontsManager* fontsManager) override;
-
-    TextData mTextData;
+    std::string mContent;
+    bool mContentIsDirty{true};
 };
 
 using TextNodetr = std::unique_ptr<TextNode>;

src/visual_elements/Texture.h

@@ -0,0 +1,7 @@
+#pragma once
+
+class Texture
+{
+public:
+    Texture() = default;
+};

src/visual_elements/Transform.cpp

@@ -0,0 +1,10 @@
+#include "Transform.h"
+
+Transform::Transform(const Point& location, double scaleX, double scaleY, double scaleZ)
+    : mLocation(location),
+      mScaleX(scaleX),
+      mScaleY(scaleY),
+      mScaleZ(scaleZ)
+{
+
+}

src/visual_elements/Transform.h

@@ -0,0 +1,47 @@
+#pragma once
+
+#include "Point.h"
+
+class Transform
+{
+public:
+    Transform(const Point& location = {}, double scaleX = 1.0, double scaleY = 1.0, double scaleZ = 1.0);
+
+    const Point& getLocation() const
+    {
+        return mLocation;
+    }
+
+    double getScaleX() const
+    {
+        return mScaleX;
+    }
+
+    double getScaleY() const
+    {
+        return mScaleY;
+    }
+
+    double getScaleZ() const
+    {
+        return mScaleZ;
+    }
+
+    bool operator==(const Transform& rhs) const
+    {
+       return (mLocation == rhs.mLocation)
+       && (mScaleX == rhs.mScaleX)
+       && (mScaleY == rhs.mScaleY)
+       && (mScaleZ == rhs.mScaleZ);
+    }
+    bool operator!=(const Transform& rhs) const
+    {
+      return !operator==(rhs);
+    }
+
+private:
+    Point mLocation;
+    double mScaleX{1};
+    double mScaleY{1};
+    double mScaleZ{1};
+};

src/visual_elements/TransformNode.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "AbstractVisualNode.h"
+
+class TransformNode : public AbstractVisualNode
+{
+public:
+
+    TransformNode()
+        : AbstractVisualNode(DiscretePoint(0, 0))
+    {
+
+    }
+
+    ~TransformNode() = default;
+};

src/visual_elements/VisualLayer.cpp

@@ -1,46 +0,0 @@
-#include "VisualLayer.h"
-
-#include "GeometryNode.h"
-#include "TextNode.h"
-
-VisualLayer::VisualLayer()
-    : mShape(),
-      mText()
-{
-
-}
-
-std::unique_ptr<VisualLayer> VisualLayer::Create()
-{
-    return std::make_unique<VisualLayer>();
-}
-
-bool VisualLayer::hasShapeNode() const
-{
-    return bool(mShape);
-}
-
-bool VisualLayer::hasTextNode() const
-{
-    return bool(mText);
-}
-
-GeometryNode* VisualLayer::getShapeNode() const
-{
-    return mShape.get();
-}
-
-TextNode* VisualLayer::getTextNode() const
-{
-    return mText.get();
-}
-
-void VisualLayer::setShapeNode(GeometryNodePtr shape)
-{
-    mShape = std::move(shape);
-}
-
-void VisualLayer::setTextNode(std::unique_ptr<TextNode> text)
-{
-    mText = std::move(text);
-}

src/visual_elements/VisualLayer.h

@@ -1,37 +0,0 @@
-#pragma once
-#include <memory>
-
-class GeometryNode;
-class TextNode;
-
-class VisualLayer
-{
-public:
-
-    VisualLayer();
-
-    static std::unique_ptr<VisualLayer> Create();
-
-    GeometryNode* getShapeNode() const;
-    TextNode* getTextNode() const;
-    bool hasShapeNode() const;
-    bool hasTextNode() const;
-    void setShapeNode(std::unique_ptr<GeometryNode> shape);
-    void setTextNode(std::unique_ptr<TextNode> text);
-
-    bool getIsDirty() const
-    {
-        return mIsDirty;
-    }
-
-    void setIsDirty(bool isDirty)
-    {
-        mIsDirty = isDirty;
-    }
-
-private:
-    bool mIsDirty{true};
-    std::unique_ptr<GeometryNode> mShape;
-    std::unique_ptr<TextNode> mText;
-};
-using VisualLayerUPtr = std::unique_ptr<VisualLayer>;

src/windows/CMakeLists.txt

@@ -12,7 +12,6 @@ if(UNIX)
             ui_interfaces/x11/XcbWindow.cpp
             ui_interfaces/x11/XcbScreen.cpp
             ui_interfaces/x11/XcbImage.cpp
-            ui_interfaces/x11/XcbLayerInterface.cpp
             ui_interfaces/x11/XcbTextInterface.cpp
             ui_interfaces/x11/XcbKeyboard.cpp
             ui_interfaces/x11/XcbGlInterface.cpp

src/windows/ui_interfaces/x11/XcbInterface.cpp

@@ -12,7 +12,6 @@
 #include "XcbScreen.h"
 #include "Color.h"
 #include "UiEvent.h"
-#include "VisualLayer.h"
 #include "XcbKeyboard.h"
 #include "XcbWindow.h"
 #include "XcbEventInterface.h"

src/windows/ui_interfaces/x11/XcbLayerInterface.cpp

@@ -1,41 +0,0 @@
-#include "XcbLayerInterface.h"
-
-#include "XcbTextInterface.h"
-#include "RectangleNode.h"
-#include "VisualLayer.h"
-
-#include <memory>
-
-void XcbLayerInterface::modifyGcColor(xcb_connection_t* connection, xcb_gcontext_t gc, const Color& color)
-{
-    uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
-    uint32_t values[2] = {color.getAsUInt32(), 0};
-
-    xcb_change_gc(connection, gc, mask, values);
-}
-
-void XcbLayerInterface::addLayer(xcb_connection_t* connection, xcb_screen_t* screen, xcb_window_t window, xcb_gcontext_t gc, VisualLayer* layer)
-{
-    /*
-    if(layer->hasText())
-    {
-        XcbTextInterface::AddTextElement(connection, screen, window, layer->getText());
-    }
-    else if(layer->hasShape())
-    {
-        auto shape = layer->getShape();
-        if(shape->getType() == GeometryNode::Type::Rectangle)
-        {
-            const auto rectangle = dynamic_cast<RectangleNode*>(shape);
-            const auto loc = rectangle->getLocation();
-            const auto width = static_cast<uint16_t>(rectangle->getWidth());
-            const auto height = static_cast<uint16_t>(rectangle->getHeight());
-            xcb_rectangle_t rectangles[] = { { static_cast<int16_t>(loc.GetX()),
-                    static_cast<int16_t>(loc.GetY()), width, height} };
-            XcbLayerInterface::modifyGcColor(connection, gc, &rectangle->getFillColor());
-            xcb_poly_fill_rectangle(connection, window, gc, 1, rectangles);
-        }
-    }
-    */
-}
-

src/windows/ui_interfaces/x11/XcbLayerInterface.h

@@ -1,15 +0,0 @@
-#pragma once
-
-#include <xcb/xcb.h>
-
-class Color;
-class VisualLayer;
-
-class XcbLayerInterface
-{
-public:
-    static void modifyGcColor(xcb_connection_t* connection, xcb_gcontext_t gc, const Color& color);
-
-    static void addLayer(xcb_connection_t* connection, xcb_screen_t* screen, xcb_window_t window, xcb_gcontext_t gc, VisualLayer* layer);
-};
-

src/windows/ui_interfaces/x11/XcbTextInterface.cpp

@@ -1,6 +1,5 @@
 #include "XcbTextInterface.h"
 
-#include "VisualLayer.h"
 #include "Color.h"
 
 #include <string.h>
@@ -35,9 +34,8 @@ void XcbTextInterface::AddTextElement(xcb_connection_t* connection,
 
     /* draw the text */
     const auto content = textElement->getContent();
-    Pixel loc = textElement->getLocation();
-    xcb_image_text_8(connection, content.length(), window, gc,
-            loc.GetX(), loc.GetY(), content.c_str());
+    //Pixel loc = textElement->getLocation();
+    // xcb_image_text_8(connection, content.length(), window, gc, loc.GetX(), loc.GetY(), content.c_str());
 
     /* free the gc */
     xcb_free_gc(connection, gc);

src/windows/ui_interfaces/x11/XcbWindow.cpp

@@ -1,7 +1,6 @@
 #include "XcbWindow.h"
 
 #include "Window.h"
-#include "XcbLayerInterface.h"
 #include "XcbScreen.h"
 #include "XcbImage.h"
 #include "Screen.h"