From 6a0c35416ed7a96c468012f7e57f327f938584b0 Mon Sep 17 00:00:00 2001
From: Cyrille Valladeau <cyrille.valladeau@c-s.fr>
Date: Wed, 7 Oct 2009 19:24:17 +0200
Subject: [PATCH] ENH : add cross gl component representation
---
Code/Visualization/otbCrossGlComponent.cxx | 122 ++++++++++++++
Code/Visualization/otbCrossGlComponent.h | 184 +++++++++++++++++++++
2 files changed, 306 insertions(+)
create mode 100644 Code/Visualization/otbCrossGlComponent.cxx
create mode 100644 Code/Visualization/otbCrossGlComponent.h
diff --git a/Code/Visualization/otbCrossGlComponent.cxx b/Code/Visualization/otbCrossGlComponent.cxx
new file mode 100644
index 0000000000..c41f6e8d58
--- /dev/null
+++ b/Code/Visualization/otbCrossGlComponent.cxx
@@ -0,0 +1,122 @@
+/*=========================================================================
+
+ Program: ORFEO Toolbox
+ Language: C++
+ Date: $Date$
+ Version: $Revision$
+
+
+ Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
+ See OTBCopyright.txt for details.
+
+
+ This software is distributed WITHOUT ANY WARRANTY; without even
+ the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ PURPOSE. See the above copyright notices for more information.
+
+=========================================================================*/
+#ifndef __otbCrossGlComponent_cxx
+#define __otbCrossGlComponent_cxx
+
+#include "otbCrossGlComponent.h"
+
+
+namespace otb
+{
+CrossGlComponent
+::CrossGlComponent() : m_IndexList(),m_Spacing(), m_Origin(), m_GluTesselator(),
+ m_ColorList(), m_LineWidth(1.5),m_CrossWidth(10), m_RedColor()
+{
+ // Default color is red
+ m_RedColor.Fill(0);
+ m_RedColor[0]=1.;
+ m_RedColor[3]=0.75;
+
+
+ // Intialize origin and spacing
+ m_Origin.Fill(0.);
+ m_Spacing.Fill(1.);
+
+ // Create the tesselator
+ m_GluTesselator = gluNewTess();
+}
+
+CrossGlComponent
+::~CrossGlComponent()
+{
+ // Delete the tesselator
+ gluDeleteTess(m_GluTesselator);
+}
+
+
+void
+CrossGlComponent
+::Render(const RegionType& extent,const AffineTransformType * space2ScreenTransform)
+{
+ if(m_IndexList.size() == 0)
+ {
+ // nothing to render, return
+ return;
+ }
+
+ // Set up blending and color
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glColor4d(m_RedColor[0],m_RedColor[1],m_RedColor[2],m_RedColor[3]);
+
+ // Set up line width
+ double previousWidth = 0.;
+ glGetDoublev(GL_LINE_WIDTH,&previousWidth);
+
+ // convert line width to screen line width
+ VectorType imageLineWidth;
+ imageLineWidth.Fill(m_LineWidth);
+ VectorType screenLineWidth = space2ScreenTransform->TransformVector(imageLineWidth);
+ glLineWidth(screenLineWidth[0]);
+ // Do we need to render boundaries only (for polygons)
+ gluTessProperty(m_GluTesselator,GLU_TESS_BOUNDARY_ONLY,false);//m_RenderPolygonBoundariesOnly);
+
+ // Enabling line antialiasing
+ glEnable(GL_LINE_SMOOTH);
+
+ for(unsigned int i=0; i<m_IndexList.size(); i++)
+ {
+ this->Render(i,extent,space2ScreenTransform);
+ }
+
+ glDisable(GL_LINE_SMOOTH);
+ glDisable(GL_BLEND);
+ glLineWidth(previousWidth);
+}
+
+
+void
+CrossGlComponent
+::Render(unsigned int id, const RegionType & extent, const AffineTransformType * space2ScreenTransform)
+{
+ glColor4d(m_ColorList[id][0],m_ColorList[id][1],m_ColorList[id][2],m_ColorList[id][3]);
+
+ // Take into account pixel spacing and origin
+ //PointType spacePoint = dataNode->GetPoint();
+ PointType spacePoint;
+ spacePoint[0]*= m_Spacing[0];
+ spacePoint[1]*= m_Spacing[1];
+ spacePoint[0] = m_IndexList[id][0] + m_Origin[0];
+ spacePoint[1] = m_IndexList[id][1] + m_Origin[1];
+
+ // Transform to a screen point
+ PointType screenPoint = space2ScreenTransform->TransformPoint(spacePoint);
+
+ glBegin(GL_LINES);
+ // Draw a cross
+ glVertex2d(screenPoint[0]-m_CrossWidth,screenPoint[1]);
+ glVertex2d(screenPoint[0]+m_CrossWidth,screenPoint[1]);
+ glVertex2d(screenPoint[0],screenPoint[1]-m_CrossWidth);
+ glVertex2d(screenPoint[0],screenPoint[1]+m_CrossWidth);
+ glEnd();
+}
+
+}
+#endif
+
+
diff --git a/Code/Visualization/otbCrossGlComponent.h b/Code/Visualization/otbCrossGlComponent.h
new file mode 100644
index 0000000000..1c11b6ec39
--- /dev/null
+++ b/Code/Visualization/otbCrossGlComponent.h
@@ -0,0 +1,184 @@
+/*=========================================================================
+
+ Program: ORFEO Toolbox
+ Language: C++
+ Date: $Date$
+ Version: $Revision$
+
+
+ Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
+ See OTBCopyright.txt for details.
+
+
+ This software is distributed WITHOUT ANY WARRANTY; without even
+ the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ PURPOSE. See the above copyright notices for more information.
+
+=========================================================================*/
+#ifndef __otbCrossGlComponent_h
+#define __otbCrossGlComponent_h
+
+#include "otbGlComponent.h"
+#include "itkPreOrderTreeIterator.h"
+
+# ifdef __APPLE__
+# include <OpenGL/glu.h>
+# else
+# include <GL/glu.h>
+# endif
+
+// There are function prototype conflits under cygwin between standard w32 API
+// and standard C ones
+#ifndef CALLBACK
+#if defined(_WINDOWS) || defined(__CYGWIN__)
+#define CALLBACK __stdcall
+#else
+#define CALLBACK
+#endif
+#endif
+
+
+namespace otb
+{
+/** \class CrossGlComponent
+* \brief This Gl Component to render a Cross.
+* No checking is done upon the adequation between the Cross
+* projection and the underlying image projection.
+*
+* Origin and Spacing allows to fit to the image axis.
+* \ingroup Visualization
+ */
+
+class CrossGlComponent : public GlComponent
+{
+public:
+ /** Standard class typedefs */
+ typedef CrossGlComponent Self;
+ typedef GlComponent Superclass;
+ typedef itk::SmartPointer<Self> Pointer;
+ typedef itk::SmartPointer<const Self> ConstPointer;
+ typedef Superclass::RegionType RegionType;
+
+ // affine transform
+ typedef Superclass::AffineTransformType AffineTransformType;
+ typedef AffineTransformType::InputPointType PointType;
+ typedef AffineTransformType::InputVectorType VectorType;
+ typedef Superclass::ColorType ColorType;
+
+ typedef itk::Index<> IndexType;
+ typedef std::vector<IndexType> IndexListType;
+ typedef std::vector<ColorType> ColorListType;
+
+ /** Runtime information */
+ itkTypeMacro(CrossGlComponent,GlComponent);
+
+ /** New macro */
+ itkNewMacro(Self);
+
+ /// Render the vector data
+ virtual void Render(const RegionType& extent,const AffineTransformType * space2ScreenTransform);
+
+ /** Set/Get the grid spacing */
+ itkSetMacro(Spacing,VectorType);
+ itkGetConstReferenceMacro(Spacing,VectorType);
+
+ /** Set/Get the grid origin */
+ itkSetMacro(Origin,PointType);
+ itkGetConstReferenceMacro(Origin,PointType);
+
+ /** Set/Get the index to render */
+ void SetIndexList(IndexListType idList) { m_IndexList = idList; };
+ IndexListType GetIndexList() { return m_IndexList; };
+ void AddIndex(IndexType id) { m_IndexList.push_back(id); m_ColorList.push_back(m_RedColor); };
+ void RemoveIndex(unsigned int id)
+ {
+ if( id >= m_IndexList.size() )
+ itkExceptionMacro(<<"Index out of size ");
+
+ m_IndexList.erase(m_IndexList.begin()+id);
+ };
+
+ /** Set/Get the color */
+ void SetColorList(ColorListType colorList) { m_ColorList = colorList; };
+ ColorListType GetColorList() { return m_ColorList; };
+ void ChangeColor(ColorType color, unsigned int id)
+ {
+ if( id >= m_ColorList.size() )
+ itkExceptionMacro(<<"Index out of size ");
+
+ m_ColorList[id] = color;
+ };
+ void RemoveColor(unsigned int id)
+ {
+ if( id >= m_ColorList.size() )
+ itkExceptionMacro(<<"Index out of size ");
+
+ m_ColorList.erase(m_ColorList.begin()+id);
+ };
+
+ /** Clear all*/
+ void Clear() { m_IndexList.clear(); m_ColorList.clear(); };
+ void ClearIndex(unsigned int id)
+ {
+ this->RemoveIndex(id);
+ this->RemoveColor(id);
+ };
+
+ /** Set/Get the line width */
+ itkSetMacro(LineWidth,double);
+ itkGetMacro(LineWidth,double);
+
+ /** Set/Get the cross width */
+ itkSetMacro(CrossWidth,double);
+ itkGetMacro(CrossWidth,double);
+
+protected:
+ /** Constructor */
+ CrossGlComponent();
+ /** Destructor */
+ virtual ~CrossGlComponent();
+ /** Printself method */
+ virtual void PrintSelf(std::ostream& os, itk::Indent indent) const
+ {
+ Superclass::PrintSelf(os,indent);
+ }
+
+ // Recursive rendering method
+ virtual void Render(unsigned int id, const RegionType & extent, const AffineTransformType * space2ScreenTransform);
+
+
+private:
+ CrossGlComponent(const Self&); // purposely not implemented
+ void operator=(const Self&); // purposely not implemented
+
+ /// Index point to render
+ IndexListType m_IndexList;
+
+ /// Spacing of the image grid
+ VectorType m_Spacing;
+
+ /// Origin of the image
+ PointType m_Origin;
+
+ /// The GluTesselator object to render complex polygons
+ GLUtesselator * m_GluTesselator;
+
+ /// Color of the vector layer
+ ColorListType m_ColorList;
+
+ /** The line width */
+ double m_LineWidth;
+
+ /** The cross width for points */
+ double m_CrossWidth;
+
+ /** Default color : red*/
+ ColorType m_RedColor;
+
+}; // end class
+} // end namespace otb
+
+#endif
+
+
+
--
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