Add outline rendering.

apps/sample-gui/image_editor/ImageViewWidget.cpp

@@ -19,7 +19,6 @@ void ImageViewWidget::doPaint(const PaintEvent* event)
 
     if (!mGridNode)
     {
-        std::cout << "Setting up grid node" << std::endl;
         mGridNode = std::make_unique<GridNode>(mLocation);
         mGridNode->setName(mName + "_GridNode");
         mGridNode->setNumX(mNumX);
@@ -27,6 +26,21 @@ void ImageViewWidget::doPaint(const PaintEvent* event)
 
         mGridNode->setWidth(mSize.mWidth);
         mGridNode->setHeight(mSize.mHeight);
+
+        mGridNode->setStrokeColor(mBorderColor);
+
         mRootNode->addChild(mGridNode.get());
     }
+
+    if (mTransformDirty)
+    {
+        mGridNode->setLocation(mLocation);
+        mGridNode->setWidth(mSize.mWidth);
+        mGridNode->setHeight(mSize.mHeight);
+    }
+
+    if (mMaterialDirty)
+    {
+        mGridNode->setFillColor(mBorderColor);
+    }
 }

src/geometry/CMakeLists.txt

@@ -17,7 +17,8 @@ list(APPEND geometry_LIB_INCLUDES
         Rectangle.h
         Rectangle.cpp
         Triangle.h
-        Triangle.cpp)
+        Triangle.cpp
+        Transform.cpp)
         
 
 # add the library

src/geometry/Point.h

@@ -33,10 +33,18 @@ public:
 
     double getDeltaY(const Point& point) const;
 
-    void scale(double x, double y)
+    void scale(double x, double y, double z = 1.0)
     {
         mX = x*mX;
         mY = y*mY;
+        mZ = z*mZ;
+    }
+
+    void translate(double x, double y, double z = 0.0)
+    {
+        mX += x;
+        mY += y;
+        mZ += z;
     }
 
     bool operator==(const Point& rhs) const

src/graphics/opengl/OpenGlMeshPainter.cpp

@@ -3,7 +3,9 @@
 #include "DrawingContext.h"
 #include "DrawingSurface.h"
 #include "SceneModel.h"
+
 #include "TriMesh.h"
+#include "LineMesh.h"
 
 #include "OpenGlShaderProgram.h"
 
@@ -43,7 +45,7 @@ void OpenGlMeshPainter::initializeBuffers()
     glGenVertexArrays(1, &mVertexArray);
 }
 
-void OpenGlMeshPainter::paint(const std::vector<float>& verts, const std::vector<unsigned>& elements, const std::vector<float>& color)
+void OpenGlMeshPainter::paint(const std::vector<float>& verts, const std::vector<unsigned>& elements, const std::vector<float>& color,  bool lines)
 {
     glBindVertexArray(mVertexArray);
 
@@ -66,7 +68,15 @@ void OpenGlMeshPainter::paint(const std::vector<float>& verts, const std::vector
     glUniform4f(vertexColorLocation, float(color[0]), float(color[1]), float(color[2]), float(color[3]));
 
     //glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
-    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+
+    if (lines)
+    {
+        glDrawElements(GL_LINES, elements.size(), GL_UNSIGNED_INT, 0);
+    }
+    else
+    {
+        glDrawElements( GL_TRIANGLES, elements.size(), GL_UNSIGNED_INT, 0);
+    }
     glBindVertexArray(0);
 }
 
@@ -86,19 +96,14 @@ void OpenGlMeshPainter::paint(SceneModel* model, DrawingContext* context)
     const auto width = float(surface->getWidth());
     const auto height = float(surface->getHeight());
 
-    auto mesh = dynamic_cast<TriMesh*>(model->getMesh());
-    std::cout << "Paint mesh for model " << model->getName() << std::endl;
-
     auto transform = model->getTransform();
-
-    auto vertices = mesh->getVerticesFlat<float>();
+    auto vertices = model->getMesh()->getVerticesFlat<float>();
     for (std::size_t idx = 0; idx<vertices.size(); idx++)
     {
         if (idx % 3 == 0)
         {
             auto x = vertices[idx]*transform.getScaleX() + transform.getLocation().getX();
             vertices[idx] = 2*x/width - 1.0;
-            std::cout << "Vert x is " << vertices[idx] << std::endl;
         }
         else if(idx%3 == 1)
         {
@@ -107,11 +112,19 @@ void OpenGlMeshPainter::paint(SceneModel* model, DrawingContext* context)
         }
     }
 
-    const auto indices = mesh->getFaceNodeIds();
+    std::vector<unsigned> indices;
+    const bool line_mesh = model->getMesh()->getType() == AbstractMesh::MeshType::LINE;
+    if (line_mesh)
+    {
+        indices = dynamic_cast<LineMesh*>(model->getMesh())->getEdgeNodeIds();
+    }
+    else
+    {
+        indices = dynamic_cast<TriMesh*>(model->getMesh())->getFaceNodeIds();
 
+    }
     auto model_color = model->getColor().getAsVectorDouble();
-    std::cout << "Color is " << model_color[0] << "|" << model_color[0] << std::endl;
     std::vector<float> color = {float(model_color[0]), float(model_color[1]), float(model_color[2]), float(model_color[3])};
 
-    paint(vertices, indices, color);
+    paint(vertices, indices, color, line_mesh);
 }

src/graphics/opengl/OpenGlMeshPainter.h

@@ -18,7 +18,7 @@ private:
     void initializeShader();
     void initializeBuffers();
 
-    void paint(const std::vector<float>& verts, const std::vector<unsigned>& elements, const std::vector<float>& color);
+    void paint(const std::vector<float>& verts, const std::vector<unsigned>& elements, const std::vector<float>& color, bool lines = false);
 
     unsigned mVertexBuffer{0};
     unsigned mElementBuffer{0};

src/mesh/AbstractMesh.cpp

@@ -38,3 +38,26 @@ void AbstractMesh::scale(double scaleX, double scaleY)
         node->scale(scaleX, scaleY);
     }
 }
+
+void AbstractMesh::transform(const Transform& transform)
+{
+    auto scaleX = transform.getScaleX();
+    auto scaleY = transform.getScaleY();
+
+    scale(scaleX, scaleY);
+
+    translate(transform.getLocation());
+}
+
+void AbstractMesh::translate(double offsetX, double offsetY, double offsetZ)
+{
+    for (auto& node : mNodes)
+    {
+        node->translate(offsetX, offsetY, offsetZ);
+    }
+}
+
+void AbstractMesh::translate(const Point& offset)
+{
+    translate(offset.getX(), offset.getY(), offset.getZ());
+}

src/mesh/AbstractMesh.h

@@ -2,6 +2,7 @@
 
 #include "Point.h"
 #include "Node.h"
+#include "Transform.h"
 
 #include <memory>
 #include <vector>
@@ -49,6 +50,12 @@ public:
 
     void scale(double scaleX, double scaleY);
 
+    void translate(const Point& offset);
+
+    void translate(double offsetX, double offsetY, double offsetZ = 0.0);
+
+    void transform(const Transform& transform);
+
 protected:
     std::unordered_map<std::string, std::vector<double> > mVectorAttributes;
     VecNodes mNodes;

src/mesh/CMakeLists.txt

@@ -7,6 +7,7 @@ list(APPEND mesh_LIB_INCLUDES
         Node.cpp
         QuadMesh.cpp
         TriMesh.cpp
+        LineMesh.cpp
         MeshPrimitives.cpp
         MeshBuilder.cpp)
         

src/mesh/LineMesh.cpp

@@ -0,0 +1,25 @@
+#include "LineMesh.h"
+
+#include "Edge.h"
+
+LineMesh::~LineMesh()
+{
+
+}
+
+void LineMesh::populate(VecNodes& nodes, VecEdges& edges)
+{
+    mNodes = std::move(nodes);
+    mEdges = std::move(edges);
+}
+
+std::vector<unsigned> LineMesh::getEdgeNodeIds() const
+{
+    std::vector<unsigned> ids(2*mEdges.size());
+    for(std::size_t idx=0; idx<mEdges.size(); idx++)
+    {
+        ids[2*idx] = mEdges[idx]->getNode0Id();
+        ids[2*idx + 1] = mEdges[idx]->getNode1Id();
+    }
+    return ids;
+}

src/mesh/LineMesh.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include "AbstractMesh.h"
+
+#include <string>
+#include <unordered_map>
+
+class Edge;
+using EdgePtr = std::unique_ptr<Edge>;
+using VecEdges = std::vector<EdgePtr>;
+
+class LineMesh : public AbstractMesh
+{
+public:
+    LineMesh() = default;
+
+    ~LineMesh();
+
+    void populate(VecNodes& nodes, VecEdges& edges);
+
+    std::vector<unsigned> getEdgeNodeIds() const;
+
+    MeshType getType() const override
+    {
+        return MeshType::LINE;
+    }
+
+private:
+    VecEdges mEdges;
+};

src/mesh/MeshBuilder.cpp

@@ -33,3 +33,23 @@ std::unique_ptr<TriMesh> MeshBuilder::buildTriMesh(const VecPoints& locations, c
     mesh->populate(nodes, edges, faces);
     return mesh;
 }
+
+std::unique_ptr<LineMesh> MeshBuilder::buildLineMesh(const VecPoints& locations, const EdgeIds& edgeIds)
+{
+    auto mesh = std::make_unique<LineMesh>();
+
+    VecNodes nodes(locations.size());
+    for (std::size_t idx=0; idx<locations.size(); idx++)
+    {
+        nodes[idx] = Node::Create(locations[idx], idx);
+    }
+
+    VecEdges edges(edgeIds.size());
+    for (std::size_t idx=0; idx<edgeIds.size(); idx++)
+    {
+        edges[idx] = Edge::Create(nodes[edgeIds[idx].first].get(), nodes[edgeIds[idx].second].get(), idx);
+    }
+
+    mesh->populate(nodes, edges);
+    return mesh;
+}

src/mesh/MeshBuilder.h

@@ -1,8 +1,11 @@
 #pragma once
 
 #include "TriMesh.h"
+#include "LineMesh.h"
 #include "Point.h"
 
+#include <memory>
+
 using EdgeIds = std::vector<std::pair<unsigned, unsigned> >;
 using FaceIds = std::vector<std::vector<unsigned> >;
 using VecPoints = std::vector<Point>;
@@ -11,4 +14,6 @@ class MeshBuilder
 {
 public:
     static std::unique_ptr<TriMesh> buildTriMesh(const VecPoints& locations, const EdgeIds& edgeIds, const FaceIds& faceIds);
+
+    static std::unique_ptr<LineMesh> buildLineMesh(const VecPoints& locations, const EdgeIds& edgeIds);
 };

src/mesh/MeshPrimitives.cpp

@@ -1,18 +1,16 @@
 #include "MeshPrimitives.h"
 
+#include "MeshBuilder.h"
+
 #include <iostream>
 
-std::unique_ptr<TriMesh> MeshPrimitives::build(const Rectangle& rectangle)
+std::unique_ptr<TriMesh> MeshPrimitives::buildRectangleAsTriMesh()
 {
-    const auto bottom_left = rectangle.getLocation();
-    const auto width = rectangle.getWidth();
-    const auto height = rectangle.getHeight();
-
     VecPoints locations = {
-            bottom_left,
-            Point(bottom_left, width, 0),
-            Point(bottom_left, width, height),
-            Point(bottom_left, 0, height)
+            {0, 0},
+            {1, 0},
+            {1, 1},
+            {0, 1}
     };
 
     EdgeIds edge_ids = {
@@ -31,14 +29,33 @@ std::unique_ptr<TriMesh> MeshPrimitives::build(const Rectangle& rectangle)
     return MeshBuilder::buildTriMesh(locations, edge_ids, face_ids);
 }
 
-std::unique_ptr<TriMesh> MeshPrimitives::buildExplodedGrid(unsigned numX, unsigned numY)
+std::unique_ptr<LineMesh> MeshPrimitives::buildRectangleAsLineMesh()
+{
+    VecPoints locations = {
+            {0, 0},
+            {1, 0},
+            {1, 1},
+            {0, 1}
+    };
+
+    EdgeIds edge_ids = {
+            {0, 1},
+            {1, 2},
+            {2, 3},
+            {3, 0}
+    };
+
+    return MeshBuilder::buildLineMesh(locations, edge_ids);
+}
+
+std::unique_ptr<TriMesh> MeshPrimitives::buildExplodedGridAsTriMesh(unsigned numX, unsigned numY)
 {
     double delta_x = 1.0/double(numX);
     double delta_y = 1.0/double(numY);
 
     VecPoints locations (4 * numX * numY);
-    double offset_x = delta_x;
-    double offset_y = delta_y;
+    double offset_x = delta_x/2.0;
+    double offset_y = delta_y/2.0;
     for (unsigned idx=0; idx<numY; idx++)
     {
         for(unsigned jdx=0; jdx<numX; jdx++)
@@ -53,9 +70,10 @@ std::unique_ptr<TriMesh> MeshPrimitives::buildExplodedGrid(unsigned numX, unsign
             locations[id_offset + 1] = Point(locX1, locY0);
             locations[id_offset + 2] = Point(locX1, locY1);
             locations[id_offset + 3] = Point(locX0, locY1);
+
             offset_x += delta_x;
         }
-        offset_x = delta_x;
+        offset_x = delta_x/2.0;
         offset_y += delta_y;
     }
 
@@ -88,3 +106,49 @@ std::unique_ptr<TriMesh> MeshPrimitives::buildExplodedGrid(unsigned numX, unsign
 
     return MeshBuilder::buildTriMesh(locations, edge_ids, face_ids);
 }
+
+std::unique_ptr<LineMesh> MeshPrimitives::buildExplodedGridAsLineMesh(unsigned numX, unsigned numY)
+{
+    double delta_x = 1.0/double(numX);
+    double delta_y = 1.0/double(numY);
+
+    VecPoints locations (4 * numX * numY);
+    double offset_x = delta_x/2.0;
+    double offset_y = delta_y/2.0;
+    for (unsigned idx=0; idx<numY; idx++)
+    {
+        for(unsigned jdx=0; jdx<numX; jdx++)
+        {
+            auto locX0 = offset_x - delta_x/2.0;
+            auto locX1 = offset_x + delta_x/2.0;
+            auto locY0 = offset_y - delta_y/2.0;
+            auto locY1 = offset_y + delta_y/2.0;
+
+            auto id_offset = 4* (jdx + numX*idx);
+            locations[id_offset] = Point(locX0, locY0);
+            locations[id_offset + 1] = Point(locX1, locY0);
+            locations[id_offset + 2] = Point(locX1, locY1);
+            locations[id_offset + 3] = Point(locX0, locY1);
+
+            offset_x += delta_x;
+        }
+        offset_x = delta_x/2.0;
+        offset_y += delta_y;
+    }
+
+    EdgeIds edge_ids(4 * numX * numY);
+    for (unsigned idx=0; idx<numY; idx++)
+    {
+        for(unsigned jdx=0; jdx<numX; jdx++)
+        {
+            unsigned node_offset = 4 * (jdx + numX * idx);
+            auto id_offset = 4* (jdx + numX*idx);
+            edge_ids[id_offset] = {node_offset, node_offset + 1};
+            edge_ids[id_offset + 1] = {node_offset + 1, node_offset + 2};
+            edge_ids[id_offset + 2] = {node_offset + 2, node_offset + 3};
+            edge_ids[id_offset + 3] = {node_offset + 3, node_offset};
+        }
+    }
+
+    return MeshBuilder::buildLineMesh(locations, edge_ids);
+}

src/mesh/MeshPrimitives.h

@@ -1,21 +1,17 @@
 #pragma once
 
-#include "Rectangle.h"
 #include "TriMesh.h"
-
-#include "Node.h"
-#include "Edge.h"
-
-#include "MeshBuilder.h"
-#include "AbstractGeometricItem.h"
-
-#include <tuple>
+#include "LineMesh.h"
 
 class MeshPrimitives
 {
 public:
 
-    static std::unique_ptr<TriMesh> build(const Rectangle& rectangle);
+    static std::unique_ptr<TriMesh> buildRectangleAsTriMesh();
 
-    static std::unique_ptr<TriMesh> buildExplodedGrid(unsigned numX, unsigned numY);
+    static std::unique_ptr<LineMesh> buildRectangleAsLineMesh();
+
+    static std::unique_ptr<TriMesh> buildExplodedGridAsTriMesh(unsigned numX, unsigned numY);
+
+    static std::unique_ptr<LineMesh> buildExplodedGridAsLineMesh(unsigned numX, unsigned numY);
 };

src/mesh/Node.h

@@ -34,6 +34,11 @@ public:
         mPoint.scale(x, y);
     }
 
+    void translate(double x, double y, double z = 0.0)
+    {
+        mPoint.translate(x, y, z);
+    }
+
 private:
     std::unordered_map<std::string, std::vector<double> > mVectorAttributes;
     unsigned mIndex{0};

src/visual_elements/CMakeLists.txt

@@ -7,7 +7,6 @@ list(APPEND visual_elements_LIB_INCLUDES
     SceneModel.cpp
     SceneItem.cpp
     SceneText.cpp
-    Transform.cpp
     Texture.cpp
     GridNode.cpp
     AbstractVisualNode.cpp

src/visual_elements/GridNode.cpp

@@ -67,56 +67,73 @@ SceneItem* GridNode::getSceneItem(std::size_t idx) const
 
 unsigned GridNode::getNumSceneItems() const
 {
-    return 1;
+    return 2;
 }
 
 void GridNode::update(FontsManager* fontsManager)
 {
     if (!mBackgroundModel || mDataDirty)
     {
-        auto mesh = MeshPrimitives::buildExplodedGrid(mNumberX, mNumberY);
-
-        if (mHeight > mWidth)
-        {
-            mesh->scale(mWidth, mWidth);
-        }
-        else
-        {
-            mesh->scale(mHeight, mHeight);
-        }
-
+        auto mesh = MeshPrimitives::buildExplodedGridAsTriMesh(mNumberX, mNumberY);
 
         if (!mBackgroundModel)
         {
-            std::cout << "Setting up background model for grid node " << std::endl;
             mBackgroundModel = std::make_unique<SceneModel>(std::move(mesh));
-            mBackgroundModel->setName(mName + "_Model");
-            mBackgroundModel->updateUniformColor({200, 200, 200, 1.0});
+            mBackgroundModel->setName(mName + "_BackgroundModel");
         }
         else
         {
             mBackgroundModel.get()->updateMesh(std::move(mesh));
-            mBackgroundModel->updateUniformColor({200, 200, 200, 1.0});
         }
     }
 
-    /*
-    if (!mOutlineModel || mDataDirty)
+    if (mOutlineModel || mDataDirty)
     {
-        const auto rect = Rectangle(Point(), 1, 1);
-        auto mesh = MeshPrimitives::build(rect);
+        auto mesh = MeshPrimitives::buildExplodedGridAsLineMesh(mNumberX, mNumberY);
 
         if (!mOutlineModel)
         {
             mOutlineModel = std::make_unique<SceneModel>(std::move(mesh));
-            mOutlineModel->setName(mName + "_Model");
+            mOutlineModel->setName(mName + "_OulineModel");
         }
         else
         {
             mOutlineModel.get()->updateMesh(std::move(mesh));
         }
     }
-    */
+
+    if (mDataDirty)
+    {
+        auto difference = mNumberX*mNumberY - mData.size();
+        mData.resize(mNumberX*mNumberY, {});
+
+        auto node_data = std::vector<std::vector<double> >(4*mNumberX*mNumberY);
+        for (unsigned idx=0; idx< node_data.size(); idx++)
+        {
+            if (idx < mData.size())
+            {
+                node_data[idx] = mData[idx].getAsVectorDouble();
+            }
+
+        }
+        //mBackgroundModel->getMesh()->addVectorAttribute("Color", mData);
+
+    }
+
+    if (mTransformIsDirty)
+    {
+        auto size = mHeight > mWidth ? mWidth : mHeight;
+
+        mBackgroundModel->updateTransform({mLocation, static_cast<double>(size), static_cast<double>(size)});
+        mOutlineModel->updateTransform({mLocation, static_cast<double>(size), static_cast<double>(size)});
+        mTransformIsDirty = false;
+    }
+
+    if (mMaterialIsDirty)
+    {
+        mOutlineModel->updateUniformColor(mStrokeColor);
+        mMaterialIsDirty = false;
+    }
 
     mDataDirty = false;
 }

src/visual_elements/RectangleNode.cpp

@@ -73,8 +73,7 @@ void RectangleNode::update(FontsManager* fontsManager)
 {
     if (!mBackgroundItem || mGeometryIsDirty)
     {
-        const auto rect = Rectangle(Point(), 1, 1);
-        auto mesh = MeshPrimitives::build(rect);
+        auto mesh = MeshPrimitives::buildRectangleAsTriMesh();
 
         if (!mBackgroundItem)
         {