Replace DPG table lookup logic with calculations

DPG used a pair of large tables to determine view
direction and rotation vector when subject was rotated
and spun.  There were many errors in the tables that
needed manual checking to correct.  The new version
uses calculations on a virtual glass cube to find view
direction and rotation vector.

src/Mod/TechDraw/App/DrawProjGroup.h

@@ -63,6 +63,8 @@ public:
     App::PropertyFloat spacingY;
 
     App::PropertyLink Anchor; /// Anchor Element to align views to
+    App::PropertyVectorList  CubeDirs;
+    App::PropertyVectorList  CubeRotations;
 
     Base::BoundBox3d getBoundingBox() const;
     double calculateAutomaticScale() const;
@@ -95,7 +97,6 @@ public:
     /** @name methods overide Feature */
     //@{
     /// recalculate the Feature
-    virtual void onDocumentRestored() override;
     virtual App::DocumentObjectExecReturn *execute(void) override;
     //@}
 
@@ -118,6 +119,7 @@ public:
     TechDraw::DrawProjGroupItem* getAnchor(void);
 
     void updateSecondaryDirs();
+    void resetCube(void);
 
     void rotateRight(void);
     void rotateLeft(void);
@@ -126,9 +128,6 @@ public:
     void spinCW(void);
     void spinCCW(void);
     
-    void setTable(Base::Vector3d dir, Base::Vector3d rot);
-    void setConfig(std::string cfg);
-    void resetTable(void);
     void dumpISO(char * title);
 
 protected:
@@ -166,13 +165,10 @@ protected:
     /// Returns pointer to our page, or NULL if it couldn't be located
     TechDraw::DrawPage * getPage(void) const;
     void updateChildren(double scale);
+    void setPropsFromCube(void);
+    void setCubeFromProps(void);
     
-    //TechDraw::Cube m_cube;
     TechDraw::Cube* m_cube;
-    static const std::map<std::string,Base::Vector3d> m_frameToStdDir;    //for initializing cube and
-    static const std::map<std::string,Base::Vector3d> m_frameToStdRot;    //creating DPGI's
-    static const std::map<std::string,std::string> m_dirRotToConfig;
-    static const std::map<std::string,std::string> m_frontTopToConfig;
 };
 
 } //namespace TechDraw