[ADD #361] An additional outline method in the wall detection module and some fixes.

 * Added a new outline method to the wall detection. Voxels or properties of its
 * input point data can be displayed using rhombs. They display the wall node group,
 * Eigen Vectors, Eigen Values and the mean coordinate.
 *
 * Applied fixes:
 * The wall detection failed by bleeding through several surfaces. The problem was
 * that no angle condition was applied during merging wall groups.
 * Also small cleanups were applied on the code.

LiDARToolbox/src/WToolkit.cpp

@@ -33,6 +33,7 @@
 #include "buildingsDetection/WMBuildingsDetection.h"
 #include "buildingsDetectionByPCA/WMBuildingsDetectionByPCA.h"
 #include "elevationImageExport/WMElevationImageExport.h"
+#include "pointsCrop/WMPointsCrop.h"
 #include "pointsCutOutliers/WMPointsCutOutliers.h"
 #include "pointsGroupSelector/WMPointsGroupSelector.h"
 #include "readLAS/WMReadLAS.h"
@@ -55,6 +56,7 @@ extern "C" void WLoadModule( WModuleList& m ) // NOLINT
     m.push_back( boost::shared_ptr< WModule >( new WMBuildingsDetection ) );
     m.push_back( boost::shared_ptr< WModule >( new WMBuildingsDetectionByPCA ) );
     m.push_back( boost::shared_ptr< WModule >( new WMElevationImageExport ) );
+    m.push_back( boost::shared_ptr< WModule >( new WMPointsCrop ) );
     m.push_back( boost::shared_ptr< WModule >( new WMPointsCutOutliers ) );
     m.push_back( boost::shared_ptr< WModule >( new WMPointsGroupSelector ) );
     m.push_back( boost::shared_ptr< WModule >( new WMReadLAS ) );

LiDARToolbox/src/buildingsDetection/WMBuildingsDetection.cpp

@@ -107,8 +107,8 @@ void WMBuildingsDetection::properties()
                             "depth for the octree search tree.", 0 );
     m_detailDepth->setMin( -3 );
     m_detailDepth->setMax( 4 );
-    m_detailDepthLabel = m_properties->addProperty( "Detail Depth meters: ", "Resulting detail depth "
-                            "in meters for the octree search tree.", 1.0  );
+    m_detailDepthLabel = m_properties->addProperty( "Voxel width meters: ", "Resulting detail depth "
+                            "in meters for the octree search tree.", pow( 2.0, m_detailDepth->get() ) * 2.0 );
     m_detailDepthLabel->setPurpose( PV_PURPOSE_INFORMATION );
 
     m_minSearchDetailDepth = m_properties->addProperty( "Detail Depth min. search: ",
@@ -173,8 +173,8 @@ void WMBuildingsDetection::moduleMain()
             detector.detectBuildings( points );
             WOctree* buildingGroups = detector.getBuildingGroups();
 
-            m_detailDepthLabel->set( pow( 2.0, m_detailDepth->get() ) );
-            WQuadTree* boundingBox = new WQuadTree( m_detailDepthLabel->get() );
+            m_detailDepthLabel->set( pow( 2.0, m_detailDepth->get() ) * 2.0 );
+            WQuadTree* boundingBox = new WQuadTree( pow( 2.0, m_detailDepth->get() ) );
 
             boost::shared_ptr< WTriangleMesh > tmpMesh( new WTriangleMesh( 0, 0 ) );
             for  ( size_t vertex = 0; vertex < count; vertex++)

LiDARToolbox/src/buildingsDetectionByPCA/WMBuildingsDetectionByPCA.cpp

@@ -99,7 +99,7 @@ void WMBuildingsDetectionByPCA::properties()
     m_detailDepth->setMin( -3 );
     m_detailDepth->setMax( 4 );
     m_detailDepthLabel = m_properties->addProperty( "Detail Depth meters: ", "Resulting detail depth "
-                            "in meters for the octree search tree.", 1.0  );
+                            "in meters for the octree search tree.", pow( 2.0, m_detailDepth->get() ) * 2.0 );
     m_detailDepthLabel->setPurpose( PV_PURPOSE_INFORMATION );
 
     m_showedIsotropicThresholdMin = m_properties->addProperty( "Eigen Value Quot. min.: ", "The minimal "
@@ -158,8 +158,8 @@ void WMBuildingsDetectionByPCA::moduleMain()
             size_t count = inputVerts->size()/3;
             setProgressSettings( count );
 
-            m_detailDepthLabel->set( pow( 2.0, m_detailDepth->get() ) );
-            WOctree* pcaAnalysis = new WOctree( m_detailDepthLabel->get(), new WPcaDetectOctNode() );
+            m_detailDepthLabel->set( pow( 2.0, m_detailDepth->get() ) * 2.0 );
+            WOctree* pcaAnalysis = new WOctree( pow( 2.0, m_detailDepth->get() ), new WPcaDetectOctNode() );
 
             boost::shared_ptr< WTriangleMesh > tmpMesh( new WTriangleMesh( 0, 0 ) );
             for  ( size_t vertex = 0; vertex < count; vertex++)

LiDARToolbox/src/buildingsDetectionByPCA/WPCADetector.cpp

@@ -50,7 +50,6 @@ void WPCADetector::setMinPointsPerVoxelToDraw( size_t minPointsPerVoxelToDraw )
 }
 void WPCADetector::analyze()
 {
-    cout << "Total nodes in set: " << m_analyzableOctree->getRootNode()->getTotalNodeCount();
     analyzeNode( ( WPcaDetectOctNode* )( m_analyzableOctree->getRootNode() ) );
 }
 void WPCADetector::analyzeNode( WPcaDetectOctNode* node )
@@ -62,9 +61,9 @@ void WPCADetector::analyzeNode( WPcaDetectOctNode* node )
         {
             WPrincipalComponentAnalysis pca;
             pca.analyzeData( node->getInputPoints() );
-            vector<double> variance = pca.getEigenValues();
-            if( variance[0] > 0.0 )
-                node->setEigenValueQuotient( variance[2] / variance[0] );
+            vector<double> eigenValues = pca.getEigenValues();
+            if( eigenValues[0] > 0.0 )
+                node->setEigenValueQuotient( eigenValues[2] / eigenValues[0] );
         }
     }
     else

LiDARToolbox/src/datastructures/octree/WOctree.cpp

@@ -127,21 +127,22 @@ void WOctree::groupNeighbourLeafs( WOctNode* node )
         for( size_t index = 0; index < neighbors.size(); index++ )
         {
             WOctNode* neighbor = neighbors[index];
-            size_t neighborID = neighbor == 0 ?group :m_groupEquivs[neighbor->getGroupNr()];
+            size_t neighborID = neighbor != 0 && neighbor->hasGroup()
+                    ?m_groupEquivs[neighbor->getGroupNr()] :group;
             if( group > neighborID && m_detailLevel == neighbor->getRadius() )
-                if( neighbor->hasGroup() )
-                    if( canGroupNodes( node, neighbor ) )
+                if( neighbor->hasGroup() && canGroupNodes( node, neighbor ) )
                         group = neighborID;
         }
         for( size_t index = 0; index < neighbors.size(); index++ )
         {
             WOctNode* neighbor = neighbors[index];
-            size_t neighborID = neighbor == 0 ?group :m_groupEquivs[neighbor->getGroupNr()];
+            size_t neighborID = neighbor != 0 && neighbor->hasGroup()
+                    ?m_groupEquivs[neighbor->getGroupNr()] :group;
             if( group < neighborID && neighbor->hasGroup() && m_detailLevel == neighbor->getRadius() )
             {
                 for( size_t newIdx = 0; newIdx < m_groupEquivs.size(); newIdx++ )
-                    if( m_groupEquivs[newIdx] == neighborID )
-                        m_groupEquivs[newIdx] = group;
+                    if( m_groupEquivs[newIdx] == neighborID &&  canGroupNodes( node, neighbor ) )
+                            m_groupEquivs[newIdx] = group;
             }
         }
         if( group >= m_groupEquivs.size() )

LiDARToolbox/src/elevationImageExport/WMElevationImageExport.cpp

@@ -108,8 +108,8 @@ void WMElevationImageExport::properties()
                             "depth for the octree search tree.", 0, m_propCondition );
     m_detailDepth->setMin( -3 );
     m_detailDepth->setMax( 4 );
-    m_detailDepthLabel = m_properties->addProperty( "Detail Depth meters: ", "Resulting detail depth "
-                            "in meters for the octree search tree.", 1.0  );
+    m_detailDepthLabel = m_properties->addProperty( "Voxel width meters: ", "Resulting detail depth "
+                            "in meters for the octree search tree.", pow( 2.0, m_detailDepth->get() ) * 2.0 );
     m_detailDepthLabel->setPurpose( PV_PURPOSE_INFORMATION );
 
 
@@ -117,7 +117,7 @@ void WMElevationImageExport::properties()
     imageModes->addItem( "Minimals", "Minimal elevation values." );
     imageModes->addItem( "Maximals", "Maximal elevation values." );
     imageModes->addItem( "Point count", "Store point count to each pixel." );
-    m_elevImageMode = m_properties->addProperty( "Color mode", "Choose one of the available colorings.",
+    m_elevImageMode = m_properties->addProperty( "Elev. image mode", "Choose one of the available colorings.",
                                                  imageModes->getSelectorFirst(), m_propCondition );
     WPropertyHelper::PC_SELECTONLYONE::addTo( m_elevImageMode );
     m_minElevImageZ = m_properties->addProperty( "Min. Z value: ",
@@ -176,8 +176,8 @@ void WMElevationImageExport::moduleMain()
             size_t count = verts->size()/3;
             setProgressSettings( count );
 
-            m_detailDepthLabel->set( pow( 2.0, m_detailDepth->get() ) );
-            m_elevationImage = new WQuadTree( m_detailDepthLabel->get() );
+            m_detailDepthLabel->set( pow( 2.0, m_detailDepth->get() ) * 2.0 );
+            m_elevationImage = new WQuadTree( pow( 2.0, m_detailDepth->get() ) );
 
             boost::shared_ptr< WTriangleMesh > tmpMesh( new WTriangleMesh( 0, 0 ) );
             for( size_t vertex = 0; vertex < count; vertex++)

LiDARToolbox/src/pointsCrop/WMPointsCrop.cpp

+//---------------------------------------------------------------------------
+//
+// Project: OpenWalnut ( http://www.openwalnut.org )
+//
+// Copyright 2009 OpenWalnut Community, BSV-Leipzig and CNCF-CBS
+// For more information see http://www.openwalnut.org/copying
+//
+// This file is part of OpenWalnut.
+//
+// OpenWalnut 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 3 of the License, or
+// (at your option) any later version.
+//
+// OpenWalnut 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 OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------
+
+#include <string>
+
+#include <fstream>  // std::ifstream
+#include <iostream> // std::cout
+#include <vector>
+
+#include <osg/Geometry>
+#include "core/kernel/WModule.h"
+
+#include "core/dataHandler/WDataSetScalar.h"
+#include "core/graphicsEngine/callbacks/WGELinearTranslationCallback.h"
+#include "core/graphicsEngine/shaders/WGEPropertyUniform.h"
+#include "core/graphicsEngine/shaders/WGEShader.h"
+#include "core/graphicsEngine/WGEGeodeUtils.h"
+#include "core/graphicsEngine/WGEManagedGroupNode.h"
+#include "core/kernel/WKernel.h"
+#include "core/kernel/WModuleInputData.h"
+#include "WMPointsCrop.xpm"
+#include "WMPointsCrop.h"
+#include "../datastructures/octree/WOctree.h"
+
+// This line is needed by the module loader to actually find your module.
+//W_LOADABLE_MODULE( WMPointsCrop )
+//TODO(aschwarzkopf): Reenable above after solving the toolbox problem
+
+WMPointsCrop::WMPointsCrop():
+    WModule(),
+    m_propCondition( new WCondition() )
+{
+}
+
+WMPointsCrop::~WMPointsCrop()
+{
+}
+
+boost::shared_ptr< WModule > WMPointsCrop::factory() const
+{
+    return boost::shared_ptr< WModule >( new WMPointsCrop() );
+}
+
+const char** WMPointsCrop::getXPMIcon() const
+{
+    return WMPointsCrop_xpm;
+}
+const std::string WMPointsCrop::getName() const
+{
+    return "Points - Crop";
+}
+
+const std::string WMPointsCrop::getDescription() const
+{
+    return "Crops point data to a selection.";
+}
+
+void WMPointsCrop::connectors()
+{
+    m_input = WModuleInputData< WDataSetPoints >::createAndAdd( shared_from_this(), "input", "The mesh to display" );
+
+    m_output = boost::shared_ptr< WModuleOutputData< WDataSetPoints > >(
+                new WModuleOutputData< WDataSetPoints >(
+                        shared_from_this(), "points", "The loaded points." ) );
+
+    addConnector( m_output );
+    WModule::connectors();
+}
+
+void WMPointsCrop::properties()
+{
+    // ---> Put the code for your properties here. See "src/modules/template/" for an extensively documented example.
+    double number_range = 1000000000.0;
+    m_fromX = m_properties->addProperty( "X min.: ", "Cut boundary.", -number_range, m_propCondition  );
+    m_toX = m_properties->addProperty( "X max.: ", "Cut boundary.", number_range, m_propCondition  );
+    m_fromY = m_properties->addProperty( "Y min.: ", "Cut boundary.", -number_range, m_propCondition  );
+    m_toY = m_properties->addProperty( "Y max.: ", "Cut boundary.", number_range, m_propCondition  );
+    m_fromZ = m_properties->addProperty( "Z min.: ", "Cut boundary.", -number_range, m_propCondition  );
+    m_toZ = m_properties->addProperty( "Z max.: ", "Cut boundary.", number_range, m_propCondition  );
+    m_cutInsteadOfCrop = m_properties->addProperty( "Cut: ", "Cut instead of crop.", false, m_propCondition  );
+
+    WModule::properties();
+}
+
+void WMPointsCrop::requirements()
+{
+}
+
+void WMPointsCrop::moduleMain()
+{
+    infoLog() << "Thrsholding example main routine started";
+
+    // get notified about data changes
+    m_moduleState.setResetable( true, true );
+    m_moduleState.add( m_input->getDataChangedCondition() );
+    m_moduleState.add( m_propCondition );
+
+    ready();
+
+    // graphics setup
+    m_rootNode = osg::ref_ptr< WGEManagedGroupNode >( new WGEManagedGroupNode( m_active ) );
+    WKernel::getRunningKernel()->getGraphicsEngine()->getScene()->insert( m_rootNode );
+
+    // main loop
+    while( !m_shutdownFlag() )
+    {
+        //infoLog() << "Waiting ...";
+        m_moduleState.wait();
+
+        boost::shared_ptr< WDataSetPoints > points = m_input->getData();
+//        std::cout << "Execute cycle\r\n";
+        if  ( points )
+        {
+            m_verts = points->getVertices();
+            m_colors = points->getColors();
+            setProgressSettings( m_verts->size() * 2 / 3 );
+            initBoundingBox();
+            m_output->updateData( getCroppedPointSet() );
+            m_progressStatus->finish();
+        }
+
+//        std::cout << "this is WOTree " << std::endl;
+
+        // woke up since the module is requested to finish?
+        if  ( m_shutdownFlag() )
+        {
+            break;
+        }
+
+        boost::shared_ptr< WDataSetPoints > points2 = m_input->getData();
+        if  ( !points2 )
+        {
+            continue;
+        }
+
+        // ---> Insert code doing the real stuff here
+    }
+
+    WKernel::getRunningKernel()->getGraphicsEngine()->getScene()->remove( m_rootNode );
+}
+void WMPointsCrop::setProgressSettings( size_t steps )
+{
+    m_progress->removeSubProgress( m_progressStatus );
+    std::string headerText = "Loading data";
+    m_progressStatus = boost::shared_ptr< WProgress >( new WProgress( headerText, steps ) );
+    m_progress->addSubProgress( m_progressStatus );
+}
+void WMPointsCrop::initBoundingBox()
+{
+    size_t count = m_verts->size() / 3;
+    if( m_verts->size() == 0 )
+        return;
+    for( size_t index = 0; index < count; index++ )
+    {
+        double x = m_verts->at( index * 3 );
+        double y = m_verts->at( index * 3 + 1 );
+        double z = m_verts->at( index * 3 + 2 );
+        if( index == 0 || x < m_minX ) m_minX = x;
+        if( index == 0 || x > m_maxX ) m_maxX = x;
+        if( index == 0 || y < m_minY ) m_minY = y;
+        if( index == 0 || y > m_maxY ) m_maxY = y;
+        if( index == 0 || z < m_minZ ) m_minZ = z;
+        if( index == 0 || z > m_maxZ ) m_maxZ = z;
+        m_progressStatus->increment( 1 );
+    }
+    m_fromX->setMin( m_minX );
+    m_fromX->setMax( m_maxX );
+    m_toX->setMin( m_fromX->get() );
+    m_toX->setMax( m_maxX );
+
+    m_fromY->setMin( m_minY );
+    m_fromY->setMax( m_maxY );
+    m_toY->setMin( m_fromY->get() );
+    m_toY->setMax( m_maxY );
+
+    m_fromZ->setMin( m_minZ );
+    m_fromZ->setMax( m_maxZ );
+    m_toZ->setMin( m_fromZ->get() );
+    m_toZ->setMax( m_maxZ );
+}
+boost::shared_ptr< WDataSetPoints > WMPointsCrop::getCroppedPointSet()
+{
+    WDataSetPoints::VertexArray outVertices(
+            new WDataSetPoints::VertexArray::element_type() );
+    WDataSetPoints::ColorArray outColors(
+            new WDataSetPoints::ColorArray::element_type() );
+
+    size_t count = m_verts->size() / 3;
+    for( size_t index = 0; index < count; index++)
+    {
+        double x = m_verts->at( index * 3 );
+        double y = m_verts->at( index * 3 + 1 );
+        double z = m_verts->at( index * 3 + 2 );
+        bool isInsideSelection = x >= m_fromX->get() && x <= m_toX->get()
+                &&  y >= m_fromY->get() && y <= m_toY->get()
+                &&  z >= m_fromZ->get() && z <= m_toZ->get();
+        if( isInsideSelection != m_cutInsteadOfCrop->get() )
+            for( size_t item = 0; item < 3; item++ )
+            {
+                outVertices->push_back( m_verts->at( index * 3 + item ) );
+                outColors->push_back( m_colors->at( index * 3 + item ) );
+            }
+        m_progressStatus->increment( 1 );
+    }
+    if( outVertices->size() == 0 )
+    {
+        for( size_t item = 0; item < 3; item++ )
+        {
+            outVertices->push_back( 0 );
+            outColors->push_back( 0 );
+        }
+    }
+    boost::shared_ptr< WDataSetPoints > outputPoints(
+            new WDataSetPoints( outVertices, outColors ) );
+    return outputPoints;
+}

LiDARToolbox/src/pointsCrop/WMPointsCrop.h

+//---------------------------------------------------------------------------
+//
+// Project: OpenWalnut ( http://www.openwalnut.org )
+//
+// Copyright 2009 OpenWalnut Community, BSV-Leipzig and CNCF-CBS
+// For more information see http://www.openwalnut.org/copying
+//
+// This file is part of OpenWalnut.
+//
+// OpenWalnut 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 3 of the License, or
+// (at your option) any later version.
+//
+// OpenWalnut 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 OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------
+
+#ifndef WMPOINTSCROP_H
+#define WMPOINTSCROP_H
+
+
+#include <liblas/liblas.hpp>
+#include <string>
+#include <vector>
+
+#include <fstream>  // std::ifstream
+#include <iostream> // std::cout
+
+#include "core/kernel/WModule.h"
+
+#include "core/graphicsEngine/WGEManagedGroupNode.h"
+#include "core/graphicsEngine/shaders/WGEShader.h"
+#include "core/graphicsEngine/WTriangleMesh.h"
+
+#include <osg/ShapeDrawable>
+#include <osg/Geode>
+#include "core/dataHandler/WDataSetPoints.h"
+#include "../datastructures/octree/WOctree.h"
+
+
+
+
+
+//!.Unnecessary imports
+#include "core/common/WItemSelection.h"
+#include "core/common/WItemSelector.h"
+
+#include "core/kernel/WModuleOutputData.h"
+
+#include <osg/Group>
+#include <osg/Material>
+#include <osg/StateAttribute>
+
+#include "core/kernel/WKernel.h"
+#include "core/common/exceptions/WFileNotFound.h"
+#include "core/common/WColor.h"
+#include "core/common/WPathHelper.h"
+#include "core/common/WPropertyHelper.h"
+#include "core/common/WItemSelectionItem.h"
+#include "core/common/WItemSelectionItemTyped.h"
+#include "core/graphicsEngine/WGEUtils.h"
+#include "core/graphicsEngine/WGERequirement.h"
+
+// forward declarations to reduce compile dependencies
+template< class T > class WModuleInputData;
+class WDataSetScalar;
+class WGEManagedGroupNode;
+
+/**
+ * Crops a point data set to a selection or cuts away a cube area.
+ * \ingroup modules
+ */
+class WMPointsCrop: public WModule
+{
+public:
+    /**
+     * Creates the module for drawing contour lines.
+     */
+    WMPointsCrop();
+
+    /**
+     * Destroys this module.
+     */
+    virtual ~WMPointsCrop();
+
+    /**
+     * Gives back the name of this module.
+     * \return the module's name.
+     */
+    virtual const std::string getName() const;
+
+    /**
+     * Gives back a description of this module.
+     * \return description to module.
+     */
+    virtual const std::string getDescription() const;
+
+    /**
+     * Due to the prototype design pattern used to build modules, this method returns a new instance of this method. NOTE: it
+     * should never be initialized or modified in some other way. A simple new instance is required.
+     * \return the prototype used to create every module in OpenWalnut.
+     */
+    virtual boost::shared_ptr< WModule > factory() const;
+
+    /**
+     * Get the icon for this module in XPM format.
+     * \return The icon.
+     */
+    virtual const char** getXPMIcon() const;
+
+protected:
+    /**
+     * Entry point after loading the module. Runs in separate thread.
+     */
+    virtual void moduleMain();
+
+    /**
+     *Initialize the connectors this module is using.
+     */
+    virtual void connectors();
+
+    /**
+     * Initialize the properties for this module.
+     */
+    virtual void properties();
+
+    /**
+     * Initialize requirements for this module.
+     */
+    virtual void requirements();
+
+private:
+    /**
+     * Initializes progress bar settings.
+     * \param steps Points count as reference to the progress bar.
+     */
+    void setProgressSettings( size_t steps );
+
+    /**
+     * The OSG root node for this module. All other geodes or OSG nodes will be attached on this single node.
+     */
+    osg::ref_ptr< WGEManagedGroupNode > m_rootNode;
+    /**
+     * Calculates the bounding box of the input point data set. Minimals and
+     * maximals of X/Y/Z are set.
+     */
+    void initBoundingBox();
+    /**
+     * Returns a cropped data set corresponding to the selection. The selection is
+     * set by m_<from/to>_<X/Y/Z>. m_cutInsteadOfCrop determines whether to crop to
+     * a selection or to cut away a cube area.
+     * \return The cropped or cut point data set.
+     */
+    boost::shared_ptr< WDataSetPoints > getCroppedPointSet();
+
+    /**
+     * WDataSetPoints data input (proposed for LiDAR data).
+     */
+    boost::shared_ptr< WModuleInputData< WDataSetPoints > > m_input;
+    /**
+     * Processed point data with cut off outliers.
+     */
+    boost::shared_ptr< WModuleOutputData< WDataSetPoints > > m_output;
+
+    /**
+     * Needed for recreating the geometry, incase when resolution changes.
+     */
+    boost::shared_ptr< WCondition > m_propCondition;
+
+    /**
+     * Plugin progress status that is shared with the reader.
+     */
+    boost::shared_ptr< WProgress > m_progressStatus;
+
+    /**
+     * Input point coordinates to crop.
+     */
+    WDataSetPoints::VertexArray m_verts;
+    /**
+     * Colors of the input point data set that are also passed through.
+     */
+    WDataSetPoints::ColorArray m_colors;
+
+    /**
+     * Minimal X value of the selection.
+     */
+    WPropDouble m_fromX;
+    /**
+     * Maximal X value of the selection.
+     */
+    WPropDouble m_toX;