Remove all BTX and ETX markers from VTK headers

Perl was used to remove all the BTX and ETX markers from the code.
The specific command that was run on all "vtk*.h" files was this:
    perl -0777 -i -pe 's/(\n* *\/\/ *[BE]TX *\n+)+/\n\n/g'

This regex replaces each BTX/ETX line, plus any leading or trailing
blank lines, with a single blank line.

Accelerators/Piston/vtkPistonDataObject.h

@@ -55,11 +55,10 @@ class VTKACCELERATORSPISTON_EXPORT vtkPistonDataObject : public vtkDataObject
   // A convenience handle to get whatever is actually stored in the reference.
   void * GetReferredData();
 
-//BTX
   // Description:
   // GPU level representation and storage this manages.
   vtkPistonReference *GetReference() { return this->Reference; };
-//ETX
+
   // Description:
   // Shallow/deep copy the data from src into this object.
   virtual void ShallowCopy(vtkDataObject* src);
@@ -101,12 +100,10 @@ class VTKACCELERATORSPISTON_EXPORT vtkPistonDataObject : public vtkDataObject
   // Set scalars range.
   void SetScalarsRange(double range[2]);
 
-  //BTX
   // Description:
   // Retrieve an instance of this class from an information object.
   static vtkPistonDataObject* GetData(vtkInformation* info);
   static vtkPistonDataObject* GetData(vtkInformationVector* v, int i=0);
-  //ETX
 
 protected:
   vtkPistonDataObject();

Charts/Core/vtkAxis.h

@@ -433,7 +433,6 @@ class VTKCHARTSCORE_EXPORT vtkAxis : public vtkContextItem
   // is TICK_SIMPLE.
   vtkStdString GenerateSimpleLabel(double val);
 
-//BTX
 protected:
   vtkAxis();
   ~vtkAxis();
@@ -602,7 +601,6 @@ class VTKCHARTSCORE_EXPORT vtkAxis : public vtkContextItem
   // Return true if the value is in range, false otherwise.
   bool InRange(double value);
 
-//ETX
 };
 
 #endif //vtkAxis_h

Charts/Core/vtkChart.h

@@ -44,7 +44,6 @@ class VTKCHARTSCORE_EXPORT vtkChart : public vtkContextItem
   vtkTypeMacro(vtkChart, vtkContextItem);
   virtual void PrintSelf(ostream &os, vtkIndent indent);
 
-//BTX
   // Description:
   // Enum of the available chart types
   enum {
@@ -81,7 +80,6 @@ class VTKCHARTSCORE_EXPORT vtkChart : public vtkContextItem
   enum EventIds {
     UpdateRange = 1002
   };
-//ETX
 
   // Description:
   // Paint event for the chart, called whenever the chart needs to be drawn

Charts/Core/vtkChartBox.h

@@ -102,7 +102,6 @@ class VTKCHARTSCORE_EXPORT vtkChartBox : public vtkChart
   // only contain one plot, this will replace the previous plot.
   virtual void SetPlot(vtkPlotBox *plot);
 
-//BTX
   // Description:
   // Return true if the supplied x, y coordinate is inside the item.
   virtual bool Hit(const vtkContextMouseEvent &mouse);
@@ -119,8 +118,6 @@ class VTKCHARTSCORE_EXPORT vtkChartBox : public vtkChart
   // Mouse button release event.
   virtual bool MouseButtonReleaseEvent(const vtkContextMouseEvent &mouse);
 
-//ETX
-
   // Description:
   // Set the vtkTooltipItem object that will be displayed by the chart.
   virtual void SetTooltip(vtkTooltipItem *tooltip);
@@ -135,7 +132,7 @@ class VTKCHARTSCORE_EXPORT vtkChartBox : public vtkChart
                               const vtkVector2d &,
                               vtkIdType, vtkPlot*,
                               vtkIdType segmentIndex = -1);
-//BTX
+
 protected:
   vtkChartBox();
   ~vtkChartBox();
@@ -187,7 +184,7 @@ class VTKCHARTSCORE_EXPORT vtkChartBox : public vtkChart
 private:
   vtkChartBox(const vtkChartBox &); // Not implemented.
   void operator=(const vtkChartBox &);   // Not implemented.
-//ETX
+
 };
 
 // Description:

Charts/Core/vtkChartParallelCoordinates.h

@@ -92,7 +92,6 @@ class VTKCHARTSCORE_EXPORT vtkChartParallelCoordinates : public vtkChart
   // only contain one plot, this will replace the previous plot.
   virtual void SetPlot(vtkPlotParallelCoordinates *plot);
 
-//BTX
   // Description:
   // Return true if the supplied x, y coordinate is inside the item.
   virtual bool Hit(const vtkContextMouseEvent &mouse);
@@ -120,9 +119,7 @@ class VTKCHARTSCORE_EXPORT vtkChartParallelCoordinates : public vtkChart
   // Description:
   // Mouse wheel event, positive delta indicates forward movement of the wheel.
   virtual bool MouseWheelEvent(const vtkContextMouseEvent &mouse, int delta);
-//ETX
 
-//BTX
 protected:
   vtkChartParallelCoordinates();
   ~vtkChartParallelCoordinates();
@@ -154,7 +151,7 @@ class VTKCHARTSCORE_EXPORT vtkChartParallelCoordinates : public vtkChart
 private:
   vtkChartParallelCoordinates(const vtkChartParallelCoordinates &); // Not implemented.
   void operator=(const vtkChartParallelCoordinates &);   // Not implemented.
-//ETX
+
 };
 
 #endif //vtkChartParallelCoordinates_h

Charts/Core/vtkChartPie.h

@@ -78,7 +78,6 @@ class VTKCHARTSCORE_EXPORT vtkChartPie : public vtkChart
   // Set the vtkContextScene for the item, always set for an item in a scene.
   virtual void SetScene(vtkContextScene *scene);
 
-//BTX
   // Description:
   // Return true if the supplied x, y coordinate is inside the item.
   virtual bool Hit(const vtkContextMouseEvent &mouse);
@@ -106,9 +105,7 @@ class VTKCHARTSCORE_EXPORT vtkChartPie : public vtkChart
   // Description:
   // Mouse wheel event, positive delta indicates forward movement of the wheel.
   virtual bool MouseWheelEvent(const vtkContextMouseEvent &mouse, int delta);
-//ETX
 
-//BTX
 protected:
   vtkChartPie();
   ~vtkChartPie();
@@ -141,7 +138,6 @@ class VTKCHARTSCORE_EXPORT vtkChartPie : public vtkChart
   // Private implementation details
   vtkChartPiePrivate *Private;
 
-//ETX
 };
 
 #endif //vtkChartPie_h

Charts/Core/vtkChartXY.h

@@ -211,7 +211,6 @@ class VTKCHARTSCORE_EXPORT vtkChartXY : public vtkChart
                               vtkIdType, vtkPlot*,
                               vtkIdType segmentIndex = -1);
 
-//BTX
   // Description:
   // Return true if the supplied x, y coordinate is inside the item.
   virtual bool Hit(const vtkContextMouseEvent &mouse);
@@ -243,9 +242,7 @@ class VTKCHARTSCORE_EXPORT vtkChartXY : public vtkChart
   // Description:
   // Key press event.
   virtual bool KeyPressEvent(const vtkContextKeyEvent &key);
-//ETX
 
-//BTX
 protected:
   vtkChartXY();
   ~vtkChartXY();
@@ -378,7 +375,6 @@ class VTKCHARTSCORE_EXPORT vtkChartXY : public vtkChart
                              vtkVector2f &min, vtkVector2f &max,
                              vtkContextPolygon &polygon);
 
-//ETX
 };
 
 // Description:

Charts/Core/vtkChartXYZ.h

@@ -117,7 +117,6 @@ class VTKCHARTSCORE_EXPORT vtkChartXYZ : public vtkContextItem
   // properly render the data within the chart.
   void RecalculateTransform();
 
-  //BTX
   // Description:
   // Returns true if the transform is interactive, false otherwise.
   virtual bool Hit(const vtkContextMouseEvent &mouse);
@@ -139,7 +138,6 @@ class VTKCHARTSCORE_EXPORT vtkChartXYZ : public vtkContextItem
   // different 2D views.  "x" changes the view so we're looking down the X axis.
   // Similar behavior occurs for "y" or "z".
   virtual bool KeyPressEvent(const vtkContextKeyEvent &key);
-  //ETX
 
 protected:
   vtkChartXYZ();

Charts/Core/vtkPiecewisePointHandleItem.h

@@ -81,7 +81,6 @@ class VTKCHARTSCORE_EXPORT vtkPiecewisePointHandleItem : public vtkContextItem
   // Mouse button release event.
   virtual bool MouseButtonReleaseEvent(const vtkContextMouseEvent &mouse);
 
-//BTX
 protected:
   vtkPiecewisePointHandleItem();
   ~vtkPiecewisePointHandleItem();
@@ -103,7 +102,7 @@ class VTKCHARTSCORE_EXPORT vtkPiecewisePointHandleItem : public vtkContextItem
 
   class InternalPiecewisePointHandleInfo;
   InternalPiecewisePointHandleInfo* Internal;
-//ETX
+
 };
 
 #endif //vtkPiecewisePointHandleItem_h

Charts/Core/vtkPlot.h

@@ -87,7 +87,6 @@ class VTKCHARTSCORE_EXPORT vtkPlot : public vtkContextItem
   virtual void SetTooltipPrecision(int precision);
   virtual int GetTooltipPrecision();
 
-//BTX
   // Description:
   // Generate and return the tooltip label string for this plot
   // The segmentIndex parameter is ignored, except for vtkPlotBar
@@ -110,7 +109,6 @@ class VTKCHARTSCORE_EXPORT vtkPlot : public vtkContextItem
   // Description:
   // Select all points in the specified polygon.
   virtual bool SelectPointsInPolygon(const vtkContextPolygon &polygon);
-//ETX
 
   // Description:
   // Set the plot color
@@ -296,15 +294,12 @@ class VTKCHARTSCORE_EXPORT vtkPlot : public vtkContextItem
   // Default implementation is empty.
   virtual void UpdateCache() {}
 
-//BTX
   // Description:
   // A General setter/getter that should be overridden. It can silently drop
   // options, case is important
   virtual void SetProperty(const vtkStdString &property, const vtkVariant &var);
   virtual vtkVariant GetProperty(const vtkStdString &property);
-//ETX
 
-//BTX
 protected:
   vtkPlot();
   ~vtkPlot();
@@ -392,7 +387,6 @@ class VTKCHARTSCORE_EXPORT vtkPlot : public vtkContextItem
   vtkPlot(const vtkPlot &); // Not implemented.
   void operator=(const vtkPlot &); // Not implemented.
 
-//ETX
 };
 
 #endif //vtkPlot_h

Charts/Core/vtkPlot3D.h

@@ -103,7 +103,6 @@ class VTKCHARTSCORE_EXPORT vtkPlot3D : public vtkContextItem
   virtual void SetSelection(vtkIdTypeArray *id);
   virtual vtkIdTypeArray* GetSelection();
 
-//BTX
 protected:
   vtkPlot3D();
   ~vtkPlot3D();
@@ -165,7 +164,6 @@ class VTKCHARTSCORE_EXPORT vtkPlot3D : public vtkContextItem
   vtkPlot3D(const vtkPlot3D &); // Not implemented.
   void operator=(const vtkPlot3D &); // Not implemented.
 
-//ETX
 };
 
 #endif //vtkPlot3D_h

Charts/Core/vtkPlotArea.h

@@ -78,8 +78,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotArea : public vtkPlot
   virtual bool PaintLegend(vtkContext2D *painter, const vtkRectf& rect,
                            int legendIndex);
 
-//BTX
-
   // Description:
   // Function to query a plot for the nearest point to the specified coordinate.
   // Returns the index of the data series with which the point is associated, or
@@ -110,7 +108,7 @@ class VTKCHARTSCORE_EXPORT vtkPlotArea : public vtkPlot
   vtkTableCache* TableCache;
 
   vtkTimeStamp UpdateTime;
-//ETX
+
 };
 
 #endif

Charts/Core/vtkPlotBar.h

@@ -172,7 +172,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotBar : public vtkPlot
   // Select all points in the specified rectangle.
   virtual bool SelectPoints(const vtkVector2f& min, const vtkVector2f& max);
 
-//BTX
   // Description:
   // Function to query a plot for the nearest point to the specified coordinate.
   // Returns the index of the data series with which the point is associated or
@@ -241,7 +240,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotBar : public vtkPlot
 
   vtkPlotBarPrivate *Private;
 
-//ETX
 };
 
 #endif //vtkPlotBar_h

Charts/Core/vtkPlotBox.h

@@ -105,7 +105,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotBox : public vtkPlot
   // Get the vtkTextProperty that governs how the plot title is displayed.
   vtkGetObjectMacro(TitleProperties, vtkTextProperty);
 
-//BTX
 protected:
   vtkPlotBox();
   ~vtkPlotBox();
@@ -141,7 +140,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotBox : public vtkPlot
   vtkPlotBox(const vtkPlotBox &); // Not implemented.
   void operator=(const vtkPlotBox &); // Not implemented.
 
-//ETX
 };
 
 #endif //vtkPlotBox_h

Charts/Core/vtkPlotFunctionalBag.h

@@ -95,15 +95,14 @@ class VTKCHARTSCORE_EXPORT vtkPlotFunctionalBag : public vtkPlot
   // is available with the scalar data.
   virtual void CreateDefaultLookupTable();
 
-//BTX
   // Description:
   // Function to query a plot for the nearest point to the specified coordinate.
   // Returns the index of the data series with which the point is associated or
   // -1.
   virtual vtkIdType GetNearestPoint(const vtkVector2f& point,
                                     const vtkVector2f& tolerance,
                                     vtkVector2f* location);
-//ETX
+
   // Description:
   // Select all points in the specified rectangle.
   virtual bool SelectPoints(const vtkVector2f& min, const vtkVector2f& max);

Charts/Core/vtkPlotGrid.h

@@ -54,7 +54,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotGrid : public vtkContextItem
   // Paint event for the axis, called whenever the axis needs to be drawn
   virtual bool Paint(vtkContext2D *painter);
 
-//BTX
 protected:
   vtkPlotGrid();
   ~vtkPlotGrid();
@@ -68,7 +67,7 @@ class VTKCHARTSCORE_EXPORT vtkPlotGrid : public vtkContextItem
 private:
   vtkPlotGrid(const vtkPlotGrid &); // Not implemented.
   void operator=(const vtkPlotGrid &);   // Not implemented.
-//ETX
+
 };
 
 #endif //vtkPlotGrid_h

Charts/Core/vtkPlotHistogram2D.h

@@ -75,7 +75,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotHistogram2D : public vtkPlot
   virtual void SetPosition(const vtkRectf& pos);
   virtual vtkRectf GetPosition();
 
-//BTX
   // Description:
   // Generate and return the tooltip label string for this plot
   // The segmentIndex parameter is ignored.
@@ -125,7 +124,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotHistogram2D : public vtkPlot
   vtkPlotHistogram2D(const vtkPlotHistogram2D &); // Not implemented.
   void operator=(const vtkPlotHistogram2D &); // Not implemented.
 
-//ETX
 };
 
 #endif //vtkPlotHistogram2D_h

Charts/Core/vtkPlotLine.h

@@ -57,7 +57,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotLine : public vtkPlotPoints
   vtkGetMacro(PolyLine,bool);
   vtkBooleanMacro(PolyLine,bool);
 
-//BTX
 protected:
   vtkPlotLine();
   ~vtkPlotLine();
@@ -70,7 +69,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotLine : public vtkPlotPoints
   vtkPlotLine(const vtkPlotLine &); // Not implemented.
   void operator=(const vtkPlotLine &); // Not implemented.
 
-//ETX
 };
 
 #endif //vtkPlotLine_h

Charts/Core/vtkPlotLine3D.h

@@ -45,7 +45,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotLine3D : public vtkPlotPoints3D
   // Paint event for the XYZ plot, called whenever the chart needs to be drawn.
   virtual bool Paint(vtkContext2D *painter);
 
-//BTX
 protected:
   vtkPlotLine3D();
   ~vtkPlotLine3D();
@@ -54,7 +53,6 @@ class VTKCHARTSCORE_EXPORT vtkPlotLine3D : public vtkPlotPoints3D
   vtkPlotLine3D(const vtkPlotLine3D &); // Not implemented.
   void operator=(const vtkPlotLine3D &); // Not implemented.
 
-//ETX
 };
 
 #endif //vtkPlotLine3D_h