Clean up of scene nodes to support 2d and non int positioning.

src/visual_elements/GeometryNode.h

@@ -1,49 +0,0 @@
-#pragma once
-
-#include "MaterialNode.h"
-
-class GeometryNode : public MaterialNode
-{
-public:
-    enum class Type
-    {
-        Path,
-        Rectangle,
-        Circle,
-        Arc,
-        Line,
-        Polyline
-    };
-
-public:
-    GeometryNode(const DiscretePoint& location);
-    virtual ~GeometryNode() = default;
-
-    virtual Type getType() = 0;
-
-    unsigned getStrokeThickness() const;
-    void setStrokeThickness(unsigned thickness);
-
-protected:
-    unsigned mStrokeThickness{0};
-    Type mType;
-
-    bool mGeometryIsDirty{true};
-};
-
-class LineNode : public GeometryNode
-{
-public:
-    LineNode(const DiscretePoint& location)
-    :    GeometryNode(location)
-    {
-
-    }
-
-    Type getType()
-    {
-        return Type::Line;
-    }
-};
-
-using GeometryNodePtr = std::unique_ptr<GeometryNode>;