add tuto for histogram computing & drawing

Apps/Tuto/CMakeLists.txt

@@ -34,7 +34,7 @@ QT4_WRAP_UI( tuto2_ui tuto2.ui )
 QT4_WRAP_CPP(tuto2_moc tuto2.h)
 add_executable( tuto2 tuto2.cpp tuto2.h ${tuto2_ui}  ${tuto2_moc})
 target_link_libraries( tuto2
-	${CGoGN_LIBS_D} ${CGoGN_EXT_LIBS} )
+	${CGoGN_LIBS_D} ${CGoGN_EXT_LIBS} QtSvg)
 
 QT4_WRAP_CPP(tuto3_moc tuto3.h)
 add_executable( tuto3 tuto3.cpp ${tuto3_moc})
@@ -86,6 +86,12 @@ add_executable( tp_master tp_master.cpp ${tp_master_moc})
 target_link_libraries( tp_master
 	${CGoGN_LIBS_D}  ${CGoGN_EXT_LIBS}  )
 
+QT4_WRAP_CPP(tuto_histo_moc tuto_histo.h)
+add_executable( tuto_histo tuto_histo.cpp tuto_histo.h ${tuto_histo_ui}  ${tuto_histo_moc})
+target_link_libraries( tuto_histo
+	${CGoGN_LIBS_D} ${CGoGN_EXT_LIBS} QtSvg)
+
+
 #BOOST_LIBS macro: allow using compiled boost in windows (see readme)
 # -first argument variable that will contain the libs
 # -second argument list of boost libs separated by ; in " "

Apps/Tuto/tuto_histo.cpp

+/*******************************************************************************
+* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
+* version 0.1                                                                  *
+* Copyright (C) 2009-2012, IGG Team, LSIIT, University of Strasbourg           *
+*                                                                              *
+* This library is free software; you can redistribute it and/or modify it      *
+* under the terms of the GNU Lesser General Public License as published by the *
+* Free Software Foundation; either version 2.1 of the License, or (at your     *
+* option) any later version.                                                   *
+*                                                                              *
+* This library is distributed in the hope that it will be useful, but WITHOUT  *
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        *
+* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  *
+* for more details.                                                            *
+*                                                                              *
+* You should have received a copy of the GNU Lesser General Public License     *
+* along with this library; if not, write to the Free Software Foundation,      *
+* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
+*                                                                              *
+* Web site: http://cgogn.unistra.fr/                                           *
+* Contact information: cgogn@unistra.fr                                        *
+*                                                                              *
+*******************************************************************************/
+
+#include "tuto_histo.h"
+#include "Algo/Geometry/boundingbox.h"
+#include "Algo/Import/import.h"
+
+#include "Algo/Geometry/area.h"
+
+
+#include "Topology/generic/traversorCell.h"
+
+#include <cmath>
+#include <sstream>
+
+using namespace CGoGN ;
+
+
+
+int main(int argc, char **argv)
+{
+	//	// interface
+	QApplication app(argc, argv);
+	MyQT sqt;
+	// copy output tout Qt console of application (shift enter)
+	CGoGNout.toConsole(&sqt);
+
+	// example code itself
+	sqt.createMap(std::string(argv[1]));
+	// set help message in menu
+	sqt.setHelpMsg("Tuto Histogram: \nLoad mesh & compute histogram & quantilles\n+/- increase/decrease \
+number of classes\no/p increase/decrease number of quantilles\nw/x change \
+min/max\nc center the histogram on 0\nh show/hide histogram\nq show/hide quantilles ");
+
+	// final show for redraw
+	sqt.show();
+	// and wait for the end
+	return app.exec();
+}
+
+void MyQT::createMap(const std::string& filename)
+{
+	myMap.clear(true) ;
+
+	size_t pos = filename.rfind(".");    // position of "." in filename
+	std::string extension = filename.substr(pos);
+
+	std::vector<std::string> attrNames ;
+	if(!Algo::Import::importMesh<PFP>(myMap, filename.c_str(), attrNames))
+	{
+		CGoGNerr << "could not import " << filename << CGoGNendl ;
+		return;
+	}
+	VertexAttribute<VEC3> position = myMap.getAttribute<PFP::VEC3, VERTEX>(attrNames[0]) ;
+
+	// attribute on which we make the histogram
+	VertexAttribute<float> area = myMap.addAttribute<float, VERTEX>("area");
+
+	// attribute color to generate from histo
+	VertexAttribute<VEC3> colorF = myMap.addAttribute<PFP::VEC3, VERTEX>("colorF");
+
+	// compute the area attribute
+	Algo::Geometry::computeOneRingAreaVertices<PFP>(myMap,position,area);
+
+	// just some tricks to obtain relatives value
+	float amax=0;
+	for (unsigned int i=area.begin(); i != area.end(); area.next(i))
+		if (area[i] > amax) amax = area[i];
+	for (unsigned int i=area.begin(); i != area.end(); area.next(i))
+		area[i] -= amax/4;
+
+
+	// create a colormap class for histogram coloring
+	l_cm = new ColMap();
+
+	// create the histogram
+	l_histo = new Algo::Histogram::Histogram(*l_cm);
+
+
+	// init data with specific conversion (direction init  is: l_histo->initData(area);)
+	AttConv ac(area);
+	l_histo->initDataConvert(ac);
+
+	// compute the histogram
+	l_nbc = 20;
+	l_histo->populateHisto(l_nbc);
+
+	//compute the quantilles
+	l_nbq = 10;
+	l_histo->populateQuantilles(l_nbq);
+
+	// compute color attribute from histogram (histogram can alsdo directly update a VBO see below)
+//	l_histo->histoColorize(colorF);
+
+
+	// create a popup window
+	l_popup = new Utils::QT::QtPopUp(this);
+
+	// create the widget to view histogram
+	l_histodraw = new Utils::QT::RenderHistogram(l_popup, *l_histo);
+
+	// some simple parameters
+	l_histodraw->setQuantillesDraw(true);
+	l_histodraw->setHistoPosition(true);
+	l_histodraw->setOpacity(0.6f);
+
+	// create a table of color
+	std::vector<Geom::Vec3f> colors;
+	Utils::createTableColor01(colors,10,Utils::color_map_blue_green_red);
+
+	// and us it to color the quantilles
+	l_histodraw->setQuantillesColors(colors);
+
+	// add the widget to the popup
+	l_popup->addWidget(l_histodraw,0,0);
+	l_popup->show();
+
+	// connect the clicked signal of histogram widget to a slot
+	QObject::connect( l_histodraw, SIGNAL( clicked(unsigned int,unsigned int) ), this, SLOT( clickHisto(unsigned int,unsigned int) ) );
+
+
+    //  bounding box of scene
+    Geom::BoundingBox<PFP::VEC3> bb = Algo::Geometry::computeBoundingBox<PFP>(myMap, position);
+    float lWidthObj = std::max<PFP::REAL>(std::max<PFP::REAL>(bb.size(0), bb.size(1)), bb.size(2));
+    Geom::Vec3f lPosObj = (bb.min() +  bb.max()) / PFP::REAL(2);
+
+    // send BB info to interface for centering on GL screen
+	setParamObject(lWidthObj, lPosObj.data());
+
+	// first show for be sure that GL context is binded
+	show();
+
+	// update of position VBO 	(context GL necessary)
+	m_positionVBO->updateData(position);
+
+	//	m_colorVBO2->updateData(colorF);
+	// histogram can directly update a VBO (warning GL context must be accessible, after the first show!)
+	l_histo->histoColorizeVBO(*m_colorVBO2);
+
+	// construct rendering primities
+	m_render->initPrimitives<PFP>(myMap, allDarts, Algo::Render::GL2::TRIANGLES);
+
+
+}
+
+void MyQT::cb_keyPress(int keycode)
+{
+	switch(keycode)
+	{
+    	case '+' :
+    		l_nbc++;
+    		l_histo->populateHisto(l_nbc);
+    		l_histodraw->repaint();
+       		break;
+       	case '-' :
+       		if (l_nbc>0)
+       			l_nbc--;
+    		l_histo->populateHisto(l_nbc);
+    		l_histodraw->repaint();
+    		break;
+
+       	case 'p' :
+       		l_nbq++;
+			l_histo->populateQuantilles(l_nbq);
+			l_histodraw->repaint();
+			break;
+		case 'o' :
+			if (l_nbq>0)
+				l_nbq--;
+			l_histo->populateQuantilles(l_nbq);
+			l_histodraw->repaint();
+		break;
+		case 'q':
+			l_histodraw->setQuantillesDraw(!l_histodraw->getQuantillesDraw());
+			l_histodraw->repaint();
+			break;
+		case 'h':
+			l_histodraw->setHistoDraw(!l_histodraw->getHistoDraw());
+			l_histodraw->repaint();
+			break;
+
+       	case 'c' :
+			l_histo->centerOnZero();
+			l_histo->populateHisto(l_nbc);
+			l_histodraw->repaint();
+			break;
+
+       	case 'w' :
+       	{
+       		double av = (l_histo->getMin() + l_histo->getMax() )/2.0;
+       		l_histo->setMin(av*0.1 + l_histo->getMin()*0.9);
+       		l_histo->setMax(av*0.1 + l_histo->getMax()*0.9);
+			l_histo->populateHisto(l_nbc);
+			l_histodraw->repaint();
+       	}
+			break;
+       	case 'x' :
+       	{
+       		double av = (l_histo->getMin() + l_histo->getMax() )/2.0;
+       		l_histo->setMin(-0.1*av + l_histo->getMin()*1.1);
+       		l_histo->setMax(-0.1*av + l_histo->getMax()*1.1);
+			l_histo->populateHisto(l_nbc);
+			l_histodraw->repaint();
+       	}
+			break;
+
+
+    	default:
+    		break;
+    }
+
+}
+
+
+void MyQT::cb_initGL()
+{
+	// choose to use GL version 2
+	Utils::GLSLShader::setCurrentOGLVersion(2);
+
+	// create the render
+	m_render = new Algo::Render::GL2::MapRender();
+
+	// VBOs
+	m_positionVBO = new Utils::VBO();
+	m_colorVBO2 = new Utils::VBO();
+
+	//shader
+	m_shader2 = new Utils::ShaderColorPerVertex();
+	m_shader2->setAttributePosition(m_positionVBO);
+	registerShader(m_shader2);
+}
+
+
+void MyQT::cb_redraw()
+{
+	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+
+	// draw faces with pervertex color rendering
+	m_shader2->setAttributeColor(m_colorVBO2);
+	m_render->draw(m_shader2, Algo::Render::GL2::TRIANGLES);
+
+	glDisable(GL_POLYGON_OFFSET_FILL);
+}
+
+
+void MyQT::clickHisto(unsigned int i,unsigned int j)
+{
+	std::cout << "CLICK on column Histo: "<< i << " / Quantilles: "<< j <<std::endl;
+}
+
+
+void MyQT::cb_Save()
+{
+	std::string filename = selectFileSave("export svg",".","*.svg") ;
+	if (filename.empty())
+		return ;
+	l_histodraw->svgExport(filename);
+}
+
+void MyQT::cb_exit()
+{
+	if (m_render != NULL)
+		delete m_render;
+	if (m_shader2 != NULL)
+		delete m_shader2;
+	if (m_positionVBO != NULL)
+		delete m_positionVBO;
+	if (l_cm != NULL)
+		delete l_cm;
+	if (l_histo != NULL)
+		delete l_histo;
+	if (l_histodraw != NULL)
+		delete l_histodraw;
+	if (l_popup != NULL)
+		delete l_popup;
+}
+
+

Apps/Tuto/tuto_histo.h

+/*******************************************************************************
+* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
+* version 0.1                                                                  *
+* Copyright (C) 2009-2012, IGG Team, LSIIT, University of Strasbourg           *
+*                                                                              *
+* This library is free software; you can redistribute it and/or modify it      *
+* under the terms of the GNU Lesser General Public License as published by the *
+* Free Software Foundation; either version 2.1 of the License, or (at your     *
+* option) any later version.                                                   *
+*                                                                              *
+* This library is distributed in the hope that it will be useful, but WITHOUT  *
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        *
+* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  *
+* for more details.                                                            *
+*                                                                              *
+* You should have received a copy of the GNU Lesser General Public License     *
+* along with this library; if not, write to the Free Software Foundation,      *
+* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
+*                                                                              *
+* Web site: http://cgogn.unistra.fr/                                           *
+* Contact information: cgogn@unistra.fr                                        *
+*                                                                              *
+*******************************************************************************/
+
+#ifndef _TUTO2_
+#define _TUTO2_
+
+
+
+#include "Utils/Qt/qtSimple.h"
+#include "Utils/cgognStream.h"
+#include "Topology/generic/parameters.h"
+#include "Topology/map/embeddedMap2.h"
+
+#include "Algo/Render/GL2/mapRender.h"
+#include "Utils/Shaders/shaderSimpleColor.h"
+#include "Utils/Shaders/shaderColorPerVertex.h"
+
+
+#include "Algo/Histogram/histogram.h"
+#include "Utils/Qt/qthistodraw.h"
+
+using namespace CGoGN ;
+
+struct PFP: public PFP_STANDARD
+{
+	typedef EmbeddedMap2 MAP;
+};
+typedef PFP::MAP MAP ;
+typedef PFP::VEC3 VEC3 ;
+
+
+
+/*
+ * color map class for histogram color
+ */
+class ColMap : public Algo::Histogram::HistoColorMap
+{
+public:
+	Geom::Vec3f color(double f) const { return Utils::color_map_BCGYR(float(f));}
+};
+
+
+/*
+ * Attribute conversion to double
+ */
+//class AttConv: public Algo::Histogram::AttributeConvert
+//{
+////	VertexAttribute<float>& m_va;
+//public:
+//	/// constructor with attribute reference
+//	AttConv(VertexAttribute<float>& va): m_va(va){}
+//
+//	/// just call begin of attribute handler
+//	unsigned int begin() const { return m_va.begin();}
+//
+//	/// just call end of attribute handler
+//	unsigned int end() const  { return m_va.end();}
+//
+//	/// just call next  of attribute handler
+//	void next(unsigned int& i) const { m_va.next(i);}
+//	unsigned int nbElements() const  { return m_va.nbElements();}
+//	double operator[](unsigned int i) const { return double(m_va[i])*0.33;}
+//};
+
+class AttConv: public Algo::Histogram::AttributeConvert< VertexAttribute<float> >
+{
+public:
+	/// constructor with attribute reference
+	AttConv(VertexAttribute<float>& va): Algo::Histogram::AttributeConvert< VertexAttribute<float> >(va){}
+	double operator[](unsigned int i) const { return double(attrib[i])*0.33;}
+};
+
+
+
+class MyQT: public Utils::QT::SimpleQT
+{
+	Q_OBJECT
+public:
+	MyQT(): m_render(NULL), m_positionVBO(NULL), m_shader2(NULL),l_cm(NULL),l_histo(NULL),l_popup(NULL),l_histodraw(NULL) {}
+
+	void cb_redraw();
+	void cb_initGL();
+
+protected:
+	MAP myMap;
+
+	// render, VBO & shader
+	Algo::Render::GL2::MapRender* m_render;
+	Utils::VBO* m_positionVBO;	// position 3D
+	Utils::VBO* m_colorVBO2;	// color per vertex for edge drawing
+	Utils::ShaderColorPerVertex* m_shader2;
+
+
+	// some ptr
+	ColMap*  l_cm;
+	Algo::Histogram::Histogram* l_histo;
+	Utils::QT::QtPopUp* l_popup;
+	Utils::QT::RenderHistogram* l_histodraw;
+
+	unsigned int l_nbc;
+	unsigned int l_nbq;
+
+public:
+	// example of simple map creation
+	void createMap(const std::string& filename);
+
+	void cb_Save();
+
+	void cb_exit();
+
+	void cb_keyPress(int keycode);
+
+
+public slots:
+	void clickHisto(unsigned int i,unsigned int j);
+};
+
+
+
+
+#endif