Start cleaning geometry module.

src/visual_elements/nodes/GeometryNode.h

@@ -2,6 +2,9 @@
 
 #include "MaterialNode.h"
 
+struct SceneInfo;
+class SceneModel;
+
 class GeometryNode : public MaterialNode
 {
 public:
@@ -11,23 +14,33 @@ public:
         Rectangle,
         Circle,
         Arc,
-        Line,
-        Polyline
+        Line
     };
 
 public:
     GeometryNode(const Point& location);
-    virtual ~GeometryNode() = default;
+    virtual ~GeometryNode();
 
     virtual Type getType() = 0;
 
-    unsigned getStrokeThickness() const;
-    void setStrokeThickness(unsigned thickness);
+    SceneItem* getSceneItem(std::size_t idx) const override;
+    std::size_t getNumSceneItems() const override;
+
+    double getStrokeThickness() const;
+    void setStrokeThickness(double thickness);
+
+    void update(SceneInfo* sceneInfo) override;
 
 protected:
-    unsigned mStrokeThickness{0};
+    virtual void createOrUpdateGeometry(SceneInfo* sceneInfo) = 0;
+    virtual void updateMaterial();
+    virtual void updateTransform() = 0;
+
+    double mStrokeThickness{0};
     Type mType;
     bool mGeometryIsDirty{true};
+
+    std::unique_ptr<SceneModel> mBackgroundItem;
 };
 
 using GeometryNodePtr = std::unique_ptr<GeometryNode>;