add volumeExplorer example:

	use topo render, volume explode render and clipping plane
	can load .tet or use cubes

Apps/Examples/volumeExplorer.cpp

+/*******************************************************************************
+* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
+* version 0.1                                                                  *
+* Copyright (C) 2009-2011, 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.u-strasbg.fr/                                         *
+* Contact information: cgogn@unistra.fr                                        *
+*                                                                              *
+*******************************************************************************/
+
+
+#include "volumeExplorer.h"
+#include <iostream>
+
+#include "Algo/Modelisation/primitives3d.h"
+#include "Algo/Modelisation/polyhedron.h"
+#include "Algo/Import/import.h"
+
+
+PFP::MAP myMap;
+PFP::TVEC3 position ;
+
+void MyQT::volumes_onoff(bool x)
+{
+	render_volumes = !render_volumes;
+	updateGL();
+}
+
+void MyQT::edges_onoff(bool x)
+{
+	render_edges = !render_edges;
+	updateGL();
+}
+
+void MyQT::topo_onoff(bool x)
+{
+	render_topo = !render_topo;
+	if (render_topo)
+	{
+		SelectorDartNoBoundary<PFP::MAP> nb(myMap);
+		m_topo_render->updateData<PFP>(myMap, position, 0.8f, 0.8f, m_explode_factor, nb);
+	}
+
+	updateGL();
+}
+
+void MyQT::clipping_onoff(bool x)
+{
+	clip_volume = x;
+
+	if (clip_volume)
+	{
+		Geom::Vec3f pos = m_PlanePick->getPosition();
+		float pipo;
+		Geom::Vec3f normal = m_PlanePick->getAxisScale(2, pipo); // 2 = Z axis = plane normal
+		float d = -(pos*normal);
+		m_explode_render->setClippingPlane(Geom::Vec4f(normal[0],normal[1],normal[2],d));
+		m_topo_render->shader1()->setClipPlaneParamsAll(clip_id1, normal, pos);
+		m_topo_render->shader2()->setClipPlaneParamsAll(clip_id2, normal, pos);
+	}
+	else
+	{
+		m_explode_render->setNoClippingPlane();
+		m_topo_render->shader1()->setClipPlaneParamsAll(clip_id1, Geom::Vec3f(0,0,1), Geom::Vec3f(0,0,999999.9f));
+		m_topo_render->shader2()->setClipPlaneParamsAll(clip_id2, Geom::Vec3f(0,0,1), Geom::Vec3f(0,0,999999.9f));
+		m_topo_render->shader1()->setClipColorAttenuationFactorRelative(0.0f,0.0f);
+		m_topo_render->shader2()->setClipColorAttenuationFactorRelative(0.0f,0.0f);
+	}
+	updateGL();
+}
+
+void MyQT::hide_onoff(bool x)
+{
+	hide_clipping = !hide_clipping;
+	updateGL();
+}
+
+
+void MyQT::slider_explode(int x)
+{
+	m_explode_factor = 0.01f*(x+1);
+	m_explode_render->setExplodeVolumes(m_explode_factor);
+	updateGL();
+}
+
+
+void MyQT::slider_pressed()
+{
+	render_topoTemp = render_topo;
+	render_topo = false;
+	updateGL();
+}
+
+
+void MyQT::slider_released()
+{
+
+	render_topo = render_topoTemp;
+	if (render_topo)
+	{
+		SelectorDartNoBoundary<PFP::MAP> nb(myMap);
+		m_topo_render->updateData<PFP>(myMap, position, 0.8f, 0.8f, m_explode_factor, nb);
+	}
+	updateGL();
+}
+
+
+void MyQT::cb_initGL()
+{
+	// choose to use GL version 2
+	Utils::GLSLShader::setCurrentOGLVersion(2);
+
+	// create the renders
+    m_topo_render = new Algo::Render::GL2::Topo3Render();
+    m_explode_render = new Algo::Render::GL2::ExplodeVolumeRender();
+
+	SelectorDartNoBoundary<PFP::MAP> nb(myMap);
+	m_topo_render->updateData<PFP>(myMap, position,  0.8f, 0.8f, 0.8f, nb);
+	m_explode_render->updateData<PFP>(myMap,position);
+	m_explode_render->setExplodeVolumes(0.8f);
+	m_explode_render->setAmbiant(Geom::Vec4f(0.2f,0.2f,0.2f,1.0f));
+	m_explode_render->setDiffuse(Geom::Vec4f(0.6f,0.6f,0.9f,1.0f));
+	m_explode_render->setColorLine(Geom::Vec4f(0.8f,0.2f,0.2f,1.0f));
+
+	registerShader(m_explode_render->shaderFaces());
+	registerShader(m_explode_render->shaderLines());
+
+    m_PlanePick = new Utils::Pickable(Utils::Pickable::GRID,1);
+	m_frame = new Utils::FrameManipulator();
+	m_frame->setSize(m_WidthObj/2.0f);
+
+
+	m_topo_render->shader1()->insertClippingCode();
+	m_topo_render->shader2()->insertClippingCode();
+
+	clip_id1 = m_topo_render->shader1()->addClipPlane();
+	clip_id2 = m_topo_render->shader2()->addClipPlane();
+
+	m_topo_render->shader1()->setClipPlaneParamsAll(clip_id1, Geom::Vec3f(0,0,1), m_PosObj);
+	m_topo_render->shader2()->setClipPlaneParamsAll(clip_id2, Geom::Vec3f(0,0,1), m_PosObj);
+	m_explode_render->setClippingPlane(Geom::Vec4f(0,0,1,m_PosObj*Geom::Vec3f(0,0,-1)));
+
+}
+
+
+
+void MyQT::cb_redraw()
+{
+	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+	glEnable(GL_LIGHTING);
+
+	glEnable(GL_POLYGON_OFFSET_FILL);
+	glPolygonOffset(1.0f, 1.0f);
+
+	if (render_topo)
+		m_topo_render->drawTopo();
+
+	if (render_edges)
+	{
+		glLineWidth(2.0f);
+		m_explode_render->drawEdges();
+	}
+
+	glDisable(GL_POLYGON_OFFSET_FILL);
+
+	if (render_volumes)
+	{
+		m_explode_render->drawFaces();
+	}
+
+	if (clip_volume && !hide_clipping)
+	{
+		m_frame->draw();
+		m_PlanePick->draw();
+	}
+}
+
+
+
+void  MyQT::cb_mousePress(int button, int x, int y)
+{
+	if (!Shift())
+		return;
+
+	if (hide_clipping || !clip_volume)
+		return;
+
+	m_begX = x;
+	m_begY = y;
+
+	// get ray of selection
+	Geom::Vec3f rayA,rayB;
+	float dist = getOrthoScreenRay(x,y,rayA,rayB);
+	Geom::Vec3f AB = rayB-rayA;
+
+	unsigned int fr_picked =0;
+	// picking the frame -> axis
+	fr_picked = m_frame->pick(rayA,AB,dist);
+
+	if (fr_picked != 0)
+	{
+		m_pickedAxis=fr_picked;
+		std::cout << "PICKED:"<< m_pickedAxis << std::endl;
+
+		m_frame->highlight(m_pickedAxis);
+		m_frame->storeProjection(m_pickedAxis);
+		updateGL();
+	}
+}
+
+void  MyQT::cb_mouseRelease(int button, int x, int y)
+{
+
+	if (hide_clipping || !clip_volume)
+		return;
+
+	m_pickedAxis=0;
+	m_frame->highlight(m_pickedAxis);
+	updateGL();
+
+}
+
+void  MyQT::cb_mouseMove(int buttons, int x, int y)
+{
+	if (!Shift())
+		return;
+
+	if (hide_clipping || !clip_volume)
+		return;
+
+	// rotation selected ?
+	if (Utils::FrameManipulator::rotationAxis(m_pickedAxis))
+	{
+		if (buttons&1)
+		{
+			float angle = m_frame->angleFromMouse(x,y,x-m_begX, y-m_begY);
+			m_frame->rotate(m_pickedAxis, angle);
+		}
+		else if (buttons&2)
+			m_frame->rotateInScreen(x-m_begX, y-m_begY);
+
+		m_PlanePick->transfo() = m_frame->transfo();
+	}
+	// translation selected
+	else if (Utils::FrameManipulator::translationAxis(m_pickedAxis))
+	{
+		if (buttons&1)
+		{
+			float dist =  m_frame->distanceFromMouse(x-m_begX, y-m_begY);
+			m_frame->translate(m_pickedAxis, dist);
+		}
+		else if (buttons&2)
+			m_frame->translateInScreen(x-m_begX, y-m_begY);
+
+		m_PlanePick->transfo() = m_frame->transfo();
+	}
+	// scale selected
+	else if (Utils::FrameManipulator::scaleAxis(m_pickedAxis) )
+	{
+		float scale = m_frame->scaleFromMouse(x-m_begX, y-m_begY);
+		m_frame->scale(m_pickedAxis, scale );
+		m_PlanePick->transfo() = m_frame->transfo();
+	}
+
+	Geom::Vec3f pos = m_PlanePick->getPosition();
+	float pipo;
+	Geom::Vec3f normal = m_PlanePick->getAxisScale(2, pipo); // 2 = Z axis = plane normal
+	float d = -(pos*normal);
+	m_explode_render->setClippingPlane(Geom::Vec4f(normal[0],normal[1],normal[2],d));
+
+	m_topo_render->shader1()->setClipPlaneParamsAll(clip_id1, normal, pos);
+	m_topo_render->shader2()->setClipPlaneParamsAll(clip_id2, normal, pos);
+
+	m_begX = x;
+	m_begY = y;
+	updateGL();
+	return;
+
+}
+
+int main(int argc, char **argv)
+{
+	if (argc>1)
+	{
+		std::vector<std::string> attrNames ;
+		std::string filename(argv[1]);
+		size_t pos = filename.rfind(".");    // position of "." in filename
+		std::string extension = filename.substr(pos);
+
+		if(extension == std::string(".tet"))
+		{
+			if(!Algo::Import::importTet<PFP>(myMap,argv[1],attrNames))
+			{
+				CGoGNerr << "could not import " << argv[1] << CGoGNendl ;
+				return 1;
+			}
+			else
+				position = myMap.getAttribute<PFP::VEC3>(VERTEX , attrNames[0]) ;
+		}
+	}
+	else
+	{
+		position = myMap.addAttribute<PFP::VEC3>(VERTEX, "position");
+		Algo::Modelisation::Primitive3D<PFP> prim(myMap, position);
+		int nb = 10;
+		prim.hexaGrid_topo(nb,nb,nb);
+		prim.embedHexaGrid(1.0f,1.0f,1.0f);
+	}
+    // un peu d'interface
+	QApplication app(argc, argv);
+	MyQT sqt;
+
+	// interface de tuto5.ui
+    Utils::QT::uiDockInterface dock;
+    sqt.setDock(&dock);
+
+
+	//  bounding box
+    Geom::BoundingBox<PFP::VEC3> bb = Algo::Geometry::computeBoundingBox<PFP>(myMap, position);
+    sqt.m_WidthObj = std::max<PFP::REAL>(std::max<PFP::REAL>(bb.size(0), bb.size(1)), bb.size(2));
+    sqt.m_PosObj = (bb.min() +  bb.max()) / PFP::REAL(2);
+
+    // envoit info BB a l'interface
+	sqt.setParamObject(sqt.m_WidthObj, sqt.m_PosObj.data());
+
+	sqt.setCallBack( dock.checkBox_volumes, SIGNAL(toggled(bool)), SLOT(volumes_onoff(bool)) );
+	sqt.setCallBack( dock.checkBox_edges, SIGNAL(toggled(bool)), SLOT(edges_onoff(bool)) );
+	sqt.setCallBack( dock.checkBox_topo, SIGNAL(toggled(bool)), SLOT(topo_onoff(bool)) );
+
+	sqt.setCallBack( dock.checkBox_hide, SIGNAL(toggled(bool)), SLOT(hide_onoff(bool)) );
+	sqt.setCallBack( dock.checkBox_plane, SIGNAL(toggled(bool)), SLOT(clipping_onoff(bool)) );
+	sqt.setCallBack( dock.slider_explode, SIGNAL(valueChanged(int)), SLOT(slider_explode(int)) );
+
+	sqt.setCallBack( dock.slider_explode, SIGNAL(sliderPressed()), SLOT(slider_pressed()) );
+	sqt.setCallBack( dock.slider_explode, SIGNAL(sliderReleased()), SLOT(slider_released()) );
+
+
+	sqt.show();
+	dock.slider_explode->setValue(80);
+	sqt.clipping_onoff(true);
+
+	// et on attend la fin.
+	return app.exec();
+}

Apps/Examples/volumeExplorer.h

+/*******************************************************************************
+* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
+* version 0.1                                                                  *
+* Copyright (C) 2009-2011, 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.u-strasbg.fr/                                         *
+* Contact information: cgogn@unistra.fr                                        *
+*                                                                              *
+*******************************************************************************/
+#ifndef __TUTO5_
+#define __TUTO5_
+
+
+#include <iostream>
+
+//#define WITH_GMAP 1
+
+#include "Topology/generic/parameters.h"
+#ifdef WITH_GMAP
+	#include "Topology/gmap/embeddedGMap3.h"
+#else
+	#include "Topology/map/embeddedMap3.h"
+#endif
+
+#include "Geometry/vector_gen.h"
+#include "Algo/Geometry/boundingbox.h"
+#include "Algo/Render/GL2/topo3Render.h"
+#include "Algo/Render/GL2/explodeVolumeRender.h"
+
+#include "Utils/cgognStream.h"
+#include "Utils/Qt/qtSimple.h"
+#include "Utils/frameManipulator.h"
+
+#include "ui_volumeExplorer.h"
+#include "Utils/Qt/qtui.h"
+
+
+using namespace CGoGN ;
+
+struct PFP: public PFP_STANDARD
+{
+	// definition de la carte
+#ifdef WITH_GMAP
+	typedef EmbeddedGMap3 MAP;
+#else
+	typedef EmbeddedMap3 MAP;
+#endif
+};
+
+
+using namespace CGoGN ;
+
+
+/**
+ * Utilisation de designer-qt4:
+ * Faire un DockWiget (laisser le nom par defaut
+ * dans le Contents ajouter le layout choisi (vertical classiquement)
+ * Ajouter les widgets necessaires, mettre des noms clairs pour
+ * les utiliser dans le .cpp (pour les call back principalement)
+ */
+class MyQT: public Utils::QT::SimpleQT
+{
+	Q_OBJECT
+
+    bool render_volumes;
+	bool render_edges;
+    bool render_topo;
+    bool render_topoTemp;
+    bool clip_volume;
+    bool hide_clipping;
+
+	Algo::Render::GL2::Topo3Render* m_topo_render;
+	Algo::Render::GL2::ExplodeVolumeRender* m_explode_render;
+
+	float m_explode_factor;
+
+	// for clipping plane manipulation
+	Utils::Pickable* m_PlanePick;
+	Utils::FrameManipulator* m_frame;
+	unsigned int m_pickedAxis;
+	int m_begX;
+	int m_begY;
+	int clip_id1;
+	int clip_id2;
+public:
+	float m_WidthObj;
+	Geom::Vec3f m_PosObj;
+
+
+public:
+	MyQT():
+		render_volumes(true),
+		render_edges(true),
+		render_topo(true),
+		render_topoTemp(true),
+		clip_volume(true),
+		hide_clipping(false),
+		m_topo_render(NULL),
+		m_explode_render(NULL),
+		m_explode_factor(0.8f)
+	{}
+
+protected:
+	void cb_redraw();
+	void cb_initGL();
+	void  cb_mouseMove(int buttons, int x, int y);
+	void  cb_mousePress(int button, int x, int y);
+	void  cb_mouseRelease(int button, int x, int y);
+
+
+// slots locaux
+public slots:
+	void volumes_onoff(bool x);
+	void edges_onoff(bool x);
+	void topo_onoff(bool x);
+	void clipping_onoff(bool x);
+	void hide_onoff(bool x);
+	void slider_explode(int x);
+	void slider_pressed();
+	void slider_released();
+};
+
+#endif

Apps/Examples/volumeExplorer.ui

+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>DockWidget</class>
+ <widget class="QDockWidget" name="DockWidget">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>150</width>
+    <height>272</height>
+   </rect>
+  </property>
+  <property name="minimumSize">
+   <size>
+    <width>150</width>
+    <height>250</height>
+   </size>
+  </property>
+  <property name="windowTitle">
+   <string>Interface</string>
+  </property>
+  <widget class="QWidget" name="dockWidgetContents">
+   <property name="enabled">
+    <bool>true</bool>
+   </property>
+   <property name="sizePolicy">
+    <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+     <horstretch>0</horstretch>
+     <verstretch>0</verstretch>
+    </sizepolicy>
+   </property>
+   <property name="minimumSize">
+    <size>
+     <width>150</width>
+     <height>200</height>
+    </size>
+   </property>
+   <layout class="QGridLayout" name="gridLayout">
+    <property name="margin">
+     <number>2</number>
+    </property>
+    <property name="spacing">
+     <number>4</number>
+    </property>
+    <item row="0" column="0">
+     <layout class="QVBoxLayout" name="verticalLayout">
+      <item>
+       <widget class="QCheckBox" name="checkBox_volumes">
+        <property name="text">
+         <string>Volumes</string>
+        </property>
+        <property name="checked">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkBox_edges">
+        <property name="text">
+         <string>Edges of volumes</string>
+        </property>
+        <property name="checked">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkBox_topo">
+        <property name="text">
+         <string>Topo</string>
+        </property>
+        <property name="checked">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QSlider" name="slider_explode">
+        <property name="value">
+         <number>50</number>
+        </property>
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="Line" name="line_3">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkBox_plane">
+        <property name="text">
+         <string>clipping</string>
+        </property>
+        <property name="checkable">
+         <bool>true</bool>
+        </property>
+        <property name="checked">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkBox_hide">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="text">
+         <string>hide clipping plane</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <spacer name="verticalSpacer">
+        <property name="orientation">
+         <enum>Qt::Vertical</enum>
+        </property>
+        <property name="sizeHint" stdset="0">