Work in progress: added Switch and IndexedFaceSet to VRML1 plugin

plugins/3d/vrml/CMakeLists.txt

@@ -27,6 +27,8 @@ add_library( s3d_plugin_vrml MODULE
         v1/vrml1_material.cpp
         v1/vrml1_matbinding.cpp
         v1/vrml1_coords.cpp
+        v1/vrml1_switch.cpp
+        v1/vrml1_faceset.cpp
         )
 
 target_link_libraries( s3d_plugin_vrml kicad_3dsg ${OPENGL_LIBRARIES} ${wxWidgets_LIBRARIES} )

plugins/3d/vrml/v1/vrml1_base.cpp

@@ -28,6 +28,8 @@
 #include "vrml1_material.h"
 #include "vrml1_matbinding.h"
 #include "vrml1_coords.h"
+#include "vrml1_switch.h"
+#include "vrml1_faceset.h"
 #include "plugins/3dapi/ifsg_all.h"
 
 
@@ -444,6 +446,13 @@ bool WRL1BASE::ReadNode( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode )
 
         break;
 
+    case WRL1_INDEXEDFACESET:
+
+        if( !readFaceSet( proc, aParent, aNode ) )
+            return false;
+
+        break;
+
     //
     // items not implemented or for optional future implementation:
     //
@@ -462,6 +471,12 @@ bool WRL1BASE::ReadNode( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode )
 
             return false;
         }
+        #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+        else
+        {
+            std::cerr << " * [INFO] discarded node (currently unsupported)\n";
+        }
+        #endif
 
         break;
     }
@@ -505,13 +520,6 @@ bool WRL1BASE::readSeparator( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode
 
 bool WRL1BASE::readSwitch( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode )
 {
-    if( NULL != aNode )
-        *aNode = NULL;
-
-    return false;
-    // XXX - TO BE IMPLEMENTED
-
-    /*
     WRL1SWITCH* np = new WRL1SWITCH( m_dictionary, aParent );
 
     if( !np->Read( proc, this ) )
@@ -524,7 +532,6 @@ bool WRL1BASE::readSwitch( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode )
         *aNode = (WRL1NODE*) np;
 
     return true;
-    */
 }
 
 
@@ -588,6 +595,26 @@ bool WRL1BASE::readCoords( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode )
 }
 
 
+bool WRL1BASE::readFaceSet( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode )
+{
+    if( NULL != aNode )
+        *aNode = NULL;
+
+    WRL1FACESET* np = new WRL1FACESET( m_dictionary, aParent );
+
+    if( !np->Read( proc, this ) )
+    {
+        delete np;
+        return false;
+    }
+
+    if( NULL != aNode )
+        *aNode = (WRL1NODE*) np;
+
+    return true;
+}
+
+
 SGNODE* WRL1BASE::TranslateToSG( SGNODE* aParent, bool calcNormals )
 {
     #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 2 )

plugins/3d/vrml/v1/vrml1_base.h

@@ -56,6 +56,7 @@ private:
     bool readMaterial( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode );
     bool readMatBinding( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode );
     bool readCoords( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode );
+    bool readFaceSet( WRLPROC& proc, WRL1NODE* aParent, WRL1NODE** aNode );
 
     std::map< std::string, WRL1INLINE* > m_inlineModels;
 

plugins/3d/vrml/v1/vrml1_faceset.cpp

@@ -0,0 +1,393 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2016 Cirilo Bernardo <cirilo.bernardo@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+
+#include <iostream>
+
+#include "vrml1_base.h"
+#include "vrml1_faceset.h"
+#include "vrml1_coords.h"
+#include "plugins/3dapi/ifsg_all.h"
+
+
+WRL1FACESET::WRL1FACESET( NAMEREGISTER* aDictionary ) : WRL1NODE( aDictionary )
+{
+    m_Type = WRL1_INDEXEDFACESET;
+
+    return;
+}
+
+
+WRL1FACESET::WRL1FACESET( NAMEREGISTER* aDictionary, WRL1NODE* aParent ) :
+    WRL1NODE( aDictionary )
+{
+    m_Type = WRL1_INDEXEDFACESET;
+    m_Parent = aParent;
+
+    if( NULL != m_Parent )
+        m_Parent->AddChildNode( this );
+
+    return;
+}
+
+
+WRL1FACESET::~WRL1FACESET()
+{
+    #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 2 )
+    std::cerr << " * [INFO] Destroying IndexedFaceSet with " << m_Children.size();
+    std::cerr << " children, " << m_Refs.size() << " references and ";
+    std::cerr << m_BackPointers.size() << " backpointers\n";
+    #endif
+    return;
+}
+
+
+bool WRL1FACESET::AddRefNode( WRL1NODE* aNode )
+{
+    // this node may not own or reference any other node
+
+    #ifdef DEBUG_VRML1
+    std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+    std::cerr << " * [BUG] AddRefNode is not applicable\n";
+    #endif
+
+    return false;
+}
+
+
+bool WRL1FACESET::AddChildNode( WRL1NODE* aNode )
+{
+    // this node may not own or reference any other node
+
+    #ifdef DEBUG_VRML1
+    std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+    std::cerr << " * [BUG] AddChildNode is not applicable\n";
+    #endif
+
+    return false;
+}
+
+
+bool WRL1FACESET::Read( WRLPROC& proc, WRL1BASE* aTopNode )
+{
+    size_t line, column;
+    proc.GetFilePosData( line, column );
+
+    char tok = proc.Peek();
+
+    if( proc.eof() )
+    {
+        #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+        std::cerr << " * [INFO] bad file format; unexpected eof at line ";
+        std::cerr << line << ", column " << column << "\n";
+        #endif
+        return false;
+    }
+
+    if( '{' != tok )
+    {
+        #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+        std::cerr << proc.GetError() << "\n";
+        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+        std::cerr << " * [INFO] bad file format; expecting '{' but got '" << tok;
+        std::cerr  << "' at line " << line << ", column " << column << "\n";
+        #endif
+
+        return false;
+    }
+
+    proc.Pop();
+    std::string glob;
+
+    while( true )
+    {
+        if( proc.Peek() == '}' )
+        {
+            proc.Pop();
+            break;
+        }
+
+        if( !proc.ReadName( glob ) )
+        {
+            #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+            std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+            std::cerr << proc.GetError() <<  "\n";
+            #endif
+
+            return false;
+        }
+
+        // expecting one of:
+        // coordIndex[]
+        // materialIndex[]
+
+        proc.GetFilePosData( line, column );
+
+        if( !glob.compare( "coordIndex" ) )
+        {
+            if( !proc.ReadMFInt( coordIndex ) )
+            {
+                #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+                std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+                std::cerr << " * [INFO] invalid coordIndex at line " << line << ", column ";
+                std::cerr << column << "\n";
+                std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
+                std::cerr << " * [INFO] message: '" << proc.GetError() << "'\n";
+                #endif
+                return false;
+            }
+        }
+        else if( !glob.compare( "materialIndex" ) )
+        {
+            if( !proc.ReadMFInt( matIndex ) )
+            {
+                #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+                std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+                std::cerr << " * [INFO] invalid materialIndex at line " << line << ", column ";
+                std::cerr << column << "\n";
+                std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
+                std::cerr << " * [INFO] message: '" << proc.GetError() << "'\n";
+                #endif
+                return false;
+            }
+        }
+        else
+        {
+            #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+            std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+            std::cerr << " * [INFO] bad IndexedFaceSet at line " << line << ", column ";
+            std::cerr << column << "\n";
+            std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
+            #endif
+
+            return false;
+        }
+    }   // while( true ) -- reading contents of IndexedFaceSet{}
+
+    return true;
+}
+
+
+SGNODE* WRL1FACESET::TranslateToSG( SGNODE* aParent, bool calcNormals )
+{
+    #ifdef NOGO
+    S3D::SGTYPES ptype = S3D::GetSGNodeType( aParent );
+
+    if( NULL != aParent && ptype != S3D::SGTYPE_SHAPE )
+    {
+        #ifdef DEBUG_VRML1
+        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+        std::cerr << " * [BUG] IndexedFaceSet does not have a Shape parent (parent ID: ";
+        std::cerr << ptype << ")\n";
+        #endif
+
+        return NULL;
+    }
+
+    if( m_sgNode )
+    {
+        if( NULL != aParent )
+        {
+            if( NULL == S3D::GetSGNodeParent( m_sgNode )
+                && !S3D::AddSGNodeChild( aParent, m_sgNode ) )
+            {
+                return NULL;
+            }
+            else if( aParent != S3D::GetSGNodeParent( m_sgNode )
+                     && !S3D::AddSGNodeRef( aParent, m_sgNode ) )
+            {
+                return NULL;
+            }
+        }
+
+        return m_sgNode;
+    }
+
+    size_t vsize = coordIndex.size();
+
+    if( NULL == coord || vsize < 3 )
+        return NULL;
+
+    // create the index list and make sure we have >3 points
+    size_t idx;
+    int i1 = coordIndex[0];
+    int i2 = coordIndex[1];
+    int i3 = coordIndex[2];
+
+    WRLVEC3F* pcoords;
+    size_t coordsize;
+    ((WRL1COORDS*) coord)->GetCoords( pcoords, coordsize );
+
+    if( coordsize < 3 )
+        return NULL;
+
+    // check that all indices are valid
+    for( idx = 0; idx < vsize; ++idx )
+    {
+        if( coordIndex[idx] < 0 )
+            continue;
+
+        if( coordIndex[idx] >= (int)coordsize )
+            return NULL;
+    }
+
+    // if the indices are defective just give up
+    if( i1 < 0 || i2 < 0 || i3 < 0
+        || i1 == i2 || i1 == i3 || i2 == i3 )
+        return NULL;
+
+    std::vector< SGPOINT > lCPts;   // coordinate points for SG node
+    std::vector< int > lCIdx;       // coordinate index list for SG node (must be triads)
+    std::vector< SGVECTOR > lCNorm; // per-vertex normals
+    std::vector< int > faces;       // tracks the number of polygons for the entire set
+    int nfaces = 0;                 // number of triangles for each face in the list
+
+    // assuming convex polygons, create triangles for the SG node
+    for( idx = 3; idx < vsize; )
+    {
+        lCIdx.push_back( i1 );
+
+        if( ccw )
+        {
+            lCIdx.push_back( i2 );
+            lCIdx.push_back( i3 );
+        }
+        else
+        {
+            lCIdx.push_back( i3 );
+            lCIdx.push_back( i2 );
+        }
+
+        ++nfaces;
+        i2 = i3;
+        i3 = coordIndex[idx++];
+
+        while( ( i1 < 0 || i2 < 0 || i3 < 0 ) && ( idx < vsize ) )
+        {
+            if( i3 < 0 )
+            {
+                faces.push_back( nfaces );
+                nfaces = 0;
+            }
+
+            i1 = i2;
+            i2 = i3;
+            i3 = coordIndex[idx++];
+
+            // any invalid polygons shall void the entire faceset; this is a requirement
+            // to ensure correct handling of the normals
+            if( ( i1 < 0 && i2 < 0 ) || ( i1 < 0 && i3 < 0 ) || ( i2 < 0 && i3 < 0 ) )
+                return NULL;
+        }
+    }
+
+    if( lCIdx.empty() )
+        return NULL;
+
+    if( calcNormals || NULL == normal )
+    {
+        // create a vertex list for per-face per-vertex normals
+        std::vector< int >::iterator sI = lCIdx.begin();
+        std::vector< int >::iterator eI = lCIdx.end();
+
+        while( sI != eI )
+        {
+            lCPts.push_back( SGPOINT( pcoords[*sI].x, pcoords[*sI].y, pcoords[*sI].z ) );
+            ++sI;
+        }
+
+        for( size_t i = 0; i < lCPts.size(); i += 3 )
+        {
+            SGVECTOR sv = S3D::CalcTriNorm( lCPts[i], lCPts[i+1], lCPts[i+2] );
+            lCNorm.push_back( sv );
+            lCNorm.push_back( sv );
+            lCNorm.push_back( sv );
+        }
+
+    }
+    else
+    {
+        // XXX - TO IMPLEMENT
+        return NULL;
+        /*
+            // use the vertex list as is
+            if( normalPerVertex )
+            {
+                // normalPerVertex = TRUE
+                // rules:
+                //  + if normalIndex is not EMPTY, it is used to select a normal for each vertex
+                //  + if normalIndex is EMPTY, the normal list is used in order per vertex
+
+                if( normalIndex.empty() )
+                {
+                    for( size_t i = 0; i < coordsize; ++i )
+                    {
+                        lCPts.push_back( SGPOINT( pcoords[i].x, pcoords[i].y, pcoords[i].z ) );
+
+                        // XXX - TO IMPLEMENT
+                    }
+                }
+                else
+                {
+                    // XXX - TO IMPLEMENT: index the normals
+                }
+            }
+            else
+            {
+                // normalPerVertex = FALSE
+                // rules:
+                //  + if normalIndex is not EMPTY, it is used to select a normal for each face
+                //  + if normalIndex is EMPTY, the normal list is used in order per face
+
+            }
+        //*/
+    }
+
+    // XXX - TO IMPLEMENT: Per-vertex colors
+
+    IFSG_FACESET fsNode( aParent );
+    IFSG_COORDS cpNode( fsNode );
+    cpNode.SetCoordsList( lCPts.size(), &lCPts[0] );
+    IFSG_COORDINDEX ciNode( fsNode );
+
+    if( calcNormals || NULL == normal )
+    {
+        for( int i = 0; i < (int)lCPts.size(); ++i )
+            ciNode.AddIndex( i );
+    }
+    else
+    {
+        ciNode.SetIndices( lCIdx.size(), &lCIdx[0] );
+    }
+
+    IFSG_NORMALS nmNode( fsNode );
+    nmNode.SetNormalList( lCNorm.size(), &lCNorm[0] );
+
+    m_sgNode = fsNode.GetRawPtr();
+
+    return m_sgNode;
+    #endif
+
+    return NULL;
+}

plugins/3d/vrml/v1/vrml1_faceset.h

@@ -0,0 +1,60 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2016 Cirilo Bernardo <cirilo.bernardo@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+/**
+ * @file vrml1_faceset.h
+ */
+
+
+#ifndef VRML1_FACESET_H
+#define VRML1_FACESET_H
+
+#include <vector>
+
+#include "vrml2_node.h"
+
+class WRL1BASE;
+class SGNODE;
+
+/**
+ * Class WRL1FACESET
+ */
+class WRL1FACESET : public WRL1NODE
+{
+private:
+    std::vector< int > coordIndex;
+    std::vector< int > matIndex;
+
+public:
+    WRL1FACESET( NAMEREGISTER* aDictionary );
+    WRL1FACESET( NAMEREGISTER* aDictionary, WRL1NODE* aParent );
+    virtual ~WRL1FACESET();
+
+    // functions inherited from WRL1NODE
+    bool Read( WRLPROC& proc, WRL1BASE* aTopNode );
+    bool AddRefNode( WRL1NODE* aNode );
+    bool AddChildNode( WRL1NODE* aNode );
+    SGNODE* TranslateToSG( SGNODE* aParent, bool calcNormals );
+};
+
+#endif  // VRML1_FACESET_H

plugins/3d/vrml/v1/vrml1_switch.cpp

@@ -0,0 +1,207 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2015-2016 Cirilo Bernardo <cirilo.bernardo@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <iostream>
+#include <iterator>
+
+#include "vrml1_base.h"
+#include "vrml1_switch.h"
+#include "plugins/3dapi/ifsg_all.h"
+
+
+WRL1SWITCH::WRL1SWITCH( NAMEREGISTER* aDictionary ) : WRL1NODE( aDictionary )
+{
+    m_Type = WRL1_SWITCH;
+    whichChild = -1;
+
+    return;
+}
+
+
+WRL1SWITCH::WRL1SWITCH( NAMEREGISTER* aDictionary, WRL1NODE* aParent ) :
+    WRL1NODE( aDictionary )
+{
+    m_Type = WRL1_SWITCH;
+    m_Parent = aParent;
+    whichChild = -1;
+
+    if( NULL != m_Parent )
+        m_Parent->AddChildNode( this );
+
+    return;
+}
+
+
+WRL1SWITCH::~WRL1SWITCH()
+{
+    #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 2 )
+    std::cerr << " * [INFO] Destroying Switch with " << m_Children.size();
+    std::cerr << " children, " << m_Refs.size() << " references and ";
+    std::cerr << m_BackPointers.size() << " backpointers\n";
+    #endif
+    return;
+}
+
+
+// functions inherited from WRL1NODE
+bool WRL1SWITCH::Read( WRLPROC& proc, WRL1BASE* aTopNode )
+{
+    /*
+     * Structure of a Switch node:
+     *
+     * Switch {
+     *      exposedField    SFInt32     whichChild     -1
+     *      children
+     * }
+     */
+
+    if( NULL == aTopNode )
+    {
+        #ifdef DEBUG_VRML1
+        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+        std::cerr << " * [BUG] aTopNode is NULL\n";
+        #endif
+        return false;
+    }
+
+    size_t line, column;
+    proc.GetFilePosData( line, column );
+
+    char tok = proc.Peek();
+
+    if( proc.eof() )
+    {
+        #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+        std::cerr << " * [INFO] bad file format; unexpected eof at line ";
+        std::cerr << line << ", column " << column << "\n";
+        #endif
+        return false;
+    }
+
+    if( '{' != tok )
+    {
+        #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+        std::cerr << proc.GetError() << "\n";
+        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+        std::cerr << " * [INFO] bad file format; expecting '{' but got '" << tok;
+        std::cerr  << "' at line " << line << ", column " << column << "\n";
+        #endif
+
+        return false;
+    }
+
+    proc.Pop();
+    std::string glob;
+
+    while( true )
+    {
+        char pchar = proc.Peek();
+
+        if( pchar == '}' )
+        {
+            proc.Pop();
+            break;
+        }
+        else if ( pchar == 'w' )
+        {
+            if( !proc.ReadName( glob ) )
+            {
+                #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+                std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+                std::cerr << proc.GetError() <<  "\n";
+                #endif
+
+                return false;
+            }
+
+            if( !glob.compare( "whichChild" ) )
+            {
+                if( !proc.ReadSFInt( whichChild ) )
+                {
+                    #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+                    std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+                    std::cerr << " * [INFO] invalid whichChild at line " << line << ", column ";
+                    std::cerr << column << "\n";
+                    std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
+                    std::cerr << " * [INFO] message: '" << proc.GetError() << "'\n";
+                    #endif
+                    return false;
+                }
+
+                continue;
+            }
+
+            #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+            std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+            std::cerr << " * [INFO] invalid Switch at line " << line << ", column ";
+            std::cerr << column << " (expected 'whichChild')\n";
+            std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
+            #endif
+
+            return false;
+        }
+
+        proc.GetFilePosData( line, column );
+
+        if( !aTopNode->ReadNode( proc, this, NULL ) )
+        {
+            #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
+            std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
+            std::cerr << " * [INFO] bad file format; unexpected eof at line ";
+            std::cerr << line << ", column " << column << "\n";
+            #endif
+
+            return false;
+        }
+
+        if( proc.Peek() == ',' )
+            proc.Pop();
+
+    }   // while( true ) -- reading contents of Switch{}
+
+    return true;
+}
+
+
+SGNODE* WRL1SWITCH::TranslateToSG( SGNODE* aParent, bool calcNormals )
+{
+    #if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 2 )
+    std::cerr << " * [INFO] Translating Switch with " << m_Children.size();
+    std::cerr << " children, " << m_Refs.size() << " references and ";
+    std::cerr << m_BackPointers.size() << " backpointers\n";
+    #endif
+
+    if( m_Items.empty() )
+        return NULL;
+
+    if( whichChild < 0 || whichChild >= (int)m_Items.size() )
+        return NULL;
+
+    std::list< WRL1NODE* >::iterator ip = m_Items.begin();
+    std::advance( ip, whichChild );
+
+    m_current = *( m_Parent->GetCurrentSettings() );
+
+    return (*ip)->TranslateToSG( aParent, calcNormals );
+}

plugins/3d/vrml/v1/vrml1_switch.h

@@ -0,0 +1,55 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2015-2016 Cirilo Bernardo <cirilo.bernardo@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+/**
+ * @file vrml1_switch.h
+ */
+
+
+#ifndef VRML1_SWITCH_H
+#define VRML1_SWITCH_H
+
+#include "vrml1_node.h"
+
+class WRL1BASE;
+class SGNODE;
+
+/**
+ * Class WRL1SWITCH
+ */
+class WRL1SWITCH : public WRL1NODE
+{
+private:
+    int whichChild;
+
+public:
+    WRL1SWITCH( NAMEREGISTER* aDictionary );
+    WRL1SWITCH( NAMEREGISTER* aDictionary, WRL1NODE* aNode );
+    virtual ~WRL1SWITCH();
+
+    // functions inherited from WRL1NODE
+    bool Read( WRLPROC& proc, WRL1BASE* aTopNode );
+    SGNODE* TranslateToSG( SGNODE* aParent, bool calcNormals );
+};
+
+#endif  // VRML1_SWITCH_H

plugins/3d/vrml/v2/vrml2_switch.cpp

@@ -53,7 +53,7 @@ WRL2SWITCH::WRL2SWITCH( WRL2NODE* aParent ) : WRL2NODE()
 WRL2SWITCH::~WRL2SWITCH()
 {
     #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 2 )
-    std::cerr << " * [INFO] Destroying Transform with " << m_Children.size();
+    std::cerr << " * [INFO] Destroying Switch with " << m_Children.size();
     std::cerr << " children, " << m_Refs.size() << " references and ";
     std::cerr << m_BackPointers.size() << " backpointers\n";
     #endif
@@ -289,7 +289,7 @@ SGNODE* WRL2SWITCH::TranslateToSG( SGNODE* aParent, bool calcNormals )
     {
         #ifdef DEBUG_VRML2
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * [BUG] Transform does not have a Transform parent (parent ID: ";
+        std::cerr << " * [BUG] Switch does not have a Transform parent (parent ID: ";
         std::cerr << ptype << ")\n";
         #endif