VrmlNodes.h

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/*
 * Copyright (c) 2008, AIST, the University of Tokyo and General Robotix Inc.
 * All rights reserved. This program is made available under the terms of the
 * Eclipse Public License v1.0 which accompanies this distribution, and is
 * available at http://www.eclipse.org/legal/epl-v10.html
 * Contributors:
 * National Institute of Advanced Industrial Science and Technology (AIST)
 * General Robotix Inc. 
 */
 
#ifndef OPENHRP_UTIL_VRMLNODES_H_INCLUDED
#define OPENHRP_UTIL_VRMLNODES_H_INCLUDED
 
#include "config.h"
 
#include <vector>
#include <string>
#include <map>
#include <bitset>
#include <typeinfo>
#include <boost/intrusive_ptr.hpp>
#include <boost/array.hpp>
 
 
namespace hrp {
 
    enum VrmlFieldTypeId {
        UNDETERMINED_FIELD_TYPE = 0,
        SFBOOL,
        SFINT32, MFINT32,
        SFFLOAT, MFFLOAT,
        SFVEC2F, MFVEC2F,
        SFVEC3F, MFVEC3F,
        SFROTATION, MFROTATION,
        SFTIME, MFTIME,
        SFCOLOR, MFCOLOR,
        SFSTRING, MFSTRING,
        SFNODE, MFNODE,
        SFIMAGE,
    };
 
    typedef bool        SFBool;
    typedef int         SFInt32;
    typedef double      SFFloat;
    typedef SFFloat     SFTime;
    typedef std::string SFString;
 
    typedef boost::array<SFFloat, 2> SFVec2f;
    typedef boost::array<SFFloat, 3> SFVec3f;
    typedef boost::array<SFFloat, 4> SFVec4f;
 
    typedef SFVec3f SFColor;
    typedef SFVec4f SFRotation;
 
    typedef struct {
        int                             width;
        int                             height;
        int                             numComponents;
        std::vector<unsigned char> pixels;
    } SFImage;
 
 
    typedef std::vector<SFInt32>    MFInt32;
    typedef std::vector<SFFloat>    MFFloat;
    typedef std::vector<SFVec2f>    MFVec2f;
    typedef std::vector<SFVec3f>    MFVec3f;
    typedef std::vector<SFVec4f>    MFVec4f;
    typedef std::vector<SFRotation> MFRotation;
    typedef std::vector<SFTime>     MFTime;
    typedef std::vector<SFColor>    MFColor;
    typedef std::vector<SFString>   MFString;
 
 
    // see 4.6.3 - 4.6.10 of the VRML97 specification
    enum VrmlNodeCategory {
 
        ANY_NODE = -1,
 
        PROTO_DEF_NODE = 0,
        PROTO_INSTANCE_NODE,
 
        TOP_NODE,
        BINDABLE_NODE,
        GROUPING_NODE,
        CHILD_NODE,
 
        APPEARANCE_NODE,
        MATERIAL_NODE,
        TEXTURE_NODE,
        TEXTURE_TRANSFORM_NODE,
 
        SHAPE_NODE,
        GEOMETRY_NODE,
        COORDINATE_NODE,
        COLOR_NODE,
        NORMAL_NODE,
        TEXTURE_COORDINATE_NODE,
 
        FONT_STYLE_NODE,
 
        SENSOR_NODE,
        INLINE_NODE,
 
        LIGHT_NODE,
 
        NUM_VRML_NODE_CATEGORIES
    };
 
    class VrmlNode;
 
    inline void intrusive_ptr_add_ref(VrmlNode* obj);
    inline void intrusive_ptr_release(VrmlNode* obj);
 
    class HRP_UTIL_EXPORT VrmlNode
    {
      public:
 
        VrmlNode();
        virtual ~VrmlNode();
 
        static const char* getLabelOfFieldType(int type);
        
        std::string defName;
 
        bool isCategoryOf(VrmlNodeCategory category);
 
      protected:
        std::bitset<NUM_VRML_NODE_CATEGORIES> categorySet;
 
      private:
        int refCounter;
 
        friend void intrusive_ptr_add_ref(VrmlNode* obj);
        friend void intrusive_ptr_release(VrmlNode* obj);
    };
 
    inline void intrusive_ptr_add_ref(VrmlNode* obj){
        obj->refCounter++;
    }
    
    inline void intrusive_ptr_release(VrmlNode* obj){
        obj->refCounter--;
        if(obj->refCounter <= 0){
            delete obj;
        }
    }
 
    typedef boost::intrusive_ptr<VrmlNode> VrmlNodePtr;
 
    typedef VrmlNodePtr SFNode;
    typedef std::vector<SFNode> MFNode;
 
 
    class HRP_UTIL_EXPORT  VrmlUnsupportedNode : public VrmlNode
    {
      public:
        VrmlUnsupportedNode(const std::string& nodeTypeName);
        std::string nodeTypeName;
    };
    typedef boost::intrusive_ptr<VrmlUnsupportedNode> VrmlUnsupportedNodePtr;
 
 
    class HRP_UTIL_EXPORT  VrmlViewpoint : public VrmlNode
    {
      public:
        VrmlViewpoint();
 
        SFFloat fieldOfView;
        SFBool jump;
        SFRotation orientation;
        SFVec3f position;
        SFString description;
    };
    typedef boost::intrusive_ptr<VrmlViewpoint> VrmlViewpointPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlNavigationInfo : public VrmlNode
    {
      public:
        VrmlNavigationInfo();
 
        MFFloat avatarSize;
        SFBool headlight;
        SFFloat speed;
        MFString type;
        SFFloat visibilityLimit;
    };
    typedef boost::intrusive_ptr<VrmlNavigationInfo> VrmlNavigationInfoPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlBackground : public VrmlNode
    {
      public:
        VrmlBackground();
      
        MFFloat groundAngle;
        MFColor groundColor;
        MFFloat skyAngle;
        MFColor skyColor;
        MFString backUrl;
        MFString bottomUrl;
        MFString frontUrl;
        MFString leftUrl;
        MFString rightUrl;
        MFString topUrl;
    };
    typedef boost::intrusive_ptr<VrmlBackground> VrmlBackgroundPtr;
 
 
    class HRP_UTIL_EXPORT  AbstractVrmlGroup : public VrmlNode
    {
      public:
        AbstractVrmlGroup();
        
        virtual MFNode& getChildren() = 0;
        virtual int countChildren() = 0;
        virtual VrmlNode* getChild(int index) = 0;
        virtual void replaceChild(int childIndex, VrmlNode* childNode) = 0;
        
        void removeChild(int childIndex);
    };
    typedef boost::intrusive_ptr<AbstractVrmlGroup> AbstractVrmlGroupPtr;
    
    
    class HRP_UTIL_EXPORT VrmlGroup : public AbstractVrmlGroup
    {
      public:
        VrmlGroup();
 
        virtual MFNode& getChildren();
        virtual int countChildren();
        virtual VrmlNode* getChild(int index);
        virtual void replaceChild(int childIndex, VrmlNode* childNode);
 
        SFVec3f bboxCenter;    
        SFVec3f bboxSize;  
        MFNode children;
    };
    typedef boost::intrusive_ptr<VrmlGroup> VrmlGroupPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlTransform : public VrmlGroup
    {
      public:
        VrmlTransform();
 
        SFVec3f center;
        SFRotation rotation;
        SFVec3f scale;
        SFRotation scaleOrientation;
        SFVec3f translation;
    };
    typedef boost::intrusive_ptr<VrmlTransform> VrmlTransformPtr;
 
    class HRP_UTIL_EXPORT  VrmlInline : public VrmlGroup
    {
      public:
        VrmlInline();
        MFString urls;
    };
    typedef boost::intrusive_ptr<VrmlInline> VrmlInlinePtr;
 
 
    class VrmlAppearance;
    typedef boost::intrusive_ptr<VrmlAppearance> VrmlAppearancePtr;
 
    class VrmlGeometry;
    typedef boost::intrusive_ptr<VrmlGeometry> VrmlGeometryPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlShape : public VrmlNode
    {
      public:
        VrmlShape();
        VrmlAppearancePtr appearance;
        SFNode geometry;
    };
    typedef boost::intrusive_ptr<VrmlShape> VrmlShapePtr;
 
 
    class VrmlMaterial;
    typedef boost::intrusive_ptr<VrmlMaterial> VrmlMaterialPtr;
 
    class VrmlTexture;
    typedef boost::intrusive_ptr<VrmlTexture> VrmlTexturePtr;
 
    class VrmlTextureTransform;
    typedef boost::intrusive_ptr<VrmlTextureTransform> VrmlTextureTransformPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlAppearance : public VrmlNode
    {
      public:
        VrmlAppearance();
      
        VrmlMaterialPtr material;
        VrmlTexturePtr texture;
        VrmlTextureTransformPtr textureTransform;
    };
 
 
    class HRP_UTIL_EXPORT  VrmlMaterial : public VrmlNode
    {
      public:
        VrmlMaterial();
 
        SFFloat ambientIntensity;
        SFColor diffuseColor;
        SFColor emissiveColor;
        SFFloat shininess;
        SFColor specularColor;
        SFFloat transparency;
    };
 
 
    class HRP_UTIL_EXPORT  VrmlTexture : public VrmlNode
    {
      public:
        VrmlTexture();
    };
 
    
    class HRP_UTIL_EXPORT  VrmlImageTexture : public VrmlTexture
    {
      public:
        VrmlImageTexture();
 
        MFString url;
        SFBool   repeatS;
        SFBool   repeatT;
    };
    typedef boost::intrusive_ptr<VrmlImageTexture> VrmlImageTexturePtr;
 
 
    class HRP_UTIL_EXPORT  VrmlTextureTransform : public VrmlNode
    {
      public:
        VrmlTextureTransform();
 
        SFVec2f center;
        SFFloat rotation;
        SFVec2f scale;
        SFVec2f translation;
    };
 
    class HRP_UTIL_EXPORT  VrmlGeometry : public VrmlNode
    {
      public:
        VrmlGeometry();
    };
 
    class HRP_UTIL_EXPORT  VrmlBox : public VrmlGeometry
    {
      public:
        VrmlBox();
        SFVec3f size;
    };
    typedef boost::intrusive_ptr<VrmlBox> VrmlBoxPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlCone : public VrmlGeometry
    {
      public:
        VrmlCone();
 
        SFBool bottom;
        SFFloat bottomRadius;
        SFFloat height;
        SFBool side;
    };
    typedef boost::intrusive_ptr<VrmlCone> VrmlConePtr;
 
 
    class HRP_UTIL_EXPORT  VrmlCylinder : public VrmlGeometry
    {
      public:
        VrmlCylinder();
 
        SFBool bottom;
        SFFloat height;
        SFFloat radius;
        SFBool side;
        SFBool top;
    };
    typedef boost::intrusive_ptr<VrmlCylinder> VrmlCylinderPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlSphere : public VrmlGeometry
    {
      public:
        VrmlSphere();
        SFFloat radius;
    };
    typedef boost::intrusive_ptr<VrmlSphere> VrmlSpherePtr;
 
 
    class HRP_UTIL_EXPORT  VrmlFontStyle : public VrmlNode
    {
      public:
        VrmlFontStyle();
 
        MFString family;       
        SFBool   horizontal;
        MFString justify;
        SFString language;
        SFBool   leftToRight;
        SFFloat  size;
        SFFloat  spacing;
        SFString style;
        SFBool   topToBottom;
    };
    typedef boost::intrusive_ptr<VrmlFontStyle> VrmlFontStylePtr;
 
 
    class HRP_UTIL_EXPORT  VrmlText : public VrmlGeometry
    {
      public:
        VrmlText();
 
        MFString fstring;
        VrmlFontStylePtr fontStyle;
        MFFloat length;
        SFFloat maxExtent;
    };
    typedef boost::intrusive_ptr<VrmlText> VrmlTextPtr;
 
 
    class VrmlColor;
    typedef boost::intrusive_ptr<VrmlColor> VrmlColorPtr;
 
    class VrmlCoordinate;
    typedef boost::intrusive_ptr<VrmlCoordinate> VrmlCoordinatePtr;
 
    class HRP_UTIL_EXPORT  VrmlIndexedLineSet : public VrmlGeometry
    {
      public: 
        VrmlIndexedLineSet();
 
        VrmlColorPtr color;
        VrmlCoordinatePtr coord;
        MFInt32 colorIndex;
        SFBool colorPerVertex;
        MFInt32 coordIndex;
    };
    typedef boost::intrusive_ptr<VrmlIndexedLineSet> VrmlIndexedLineSetPtr;
 
 
    class VrmlNormal;
    typedef boost::intrusive_ptr<VrmlNormal> VrmlNormalPtr;
 
    class VrmlTextureCoordinate;
    typedef boost::intrusive_ptr<VrmlTextureCoordinate> VrmlTextureCoordinatePtr;
 
 
    class HRP_UTIL_EXPORT  VrmlIndexedFaceSet : public VrmlIndexedLineSet
    {
      public:
        VrmlIndexedFaceSet();
 
        VrmlNormalPtr normal;
        VrmlTextureCoordinatePtr texCoord;
        SFBool ccw;
        SFBool convex;
        SFFloat creaseAngle;
        MFInt32 normalIndex;
        SFBool normalPerVertex;  
        SFBool solid;
        MFInt32 texCoordIndex;
    };
    typedef boost::intrusive_ptr<VrmlIndexedFaceSet> VrmlIndexedFaceSetPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlColor : public VrmlNode
    {
      public:
        VrmlColor();
      
        MFColor color;
    };
 
 
    class HRP_UTIL_EXPORT  VrmlCoordinate : public VrmlNode
    {
      public:
        VrmlCoordinate();
        MFVec3f point;
    };
 
 
    class HRP_UTIL_EXPORT  VrmlTextureCoordinate : public VrmlNode
    {
      public:
        VrmlTextureCoordinate();
        MFVec2f point;
    };
 
 
    class HRP_UTIL_EXPORT  VrmlNormal : public VrmlNode
    {
      public:
        VrmlNormal();
        MFVec3f vector;
    };
 
 
    class HRP_UTIL_EXPORT  VrmlCylinderSensor : public VrmlNode
    {
      public:
        VrmlCylinderSensor();
 
        SFBool  autoOffset;
        SFFloat diskAngle;
        SFBool  enabled;
        SFFloat maxAngle;
        SFFloat minAngle;
        SFFloat offset;
    };
    typedef boost::intrusive_ptr<VrmlCylinderSensor> VrmlCylinderSensorPtr;
 
 
 
    // #####
    class HRP_UTIL_EXPORT  VrmlPointSet : public VrmlGeometry
    {
      public:
        VrmlPointSet();
 
        VrmlCoordinatePtr       coord;
        VrmlColorPtr            color;
    };
 
    typedef boost::intrusive_ptr<VrmlPointSet> VrmlPointSetPtr;
 
 
 
    // #####
    class HRP_UTIL_EXPORT  VrmlPixelTexture : public VrmlTexture
    {
      public:
        VrmlPixelTexture();
 
        SFImage                 image;
        SFBool                  repeatS;
        SFBool                  repeatT;
    };
 
    typedef boost::intrusive_ptr<VrmlPixelTexture> VrmlPixelTexturePtr;
 
 
 
    // #####
    class HRP_UTIL_EXPORT  VrmlMovieTexture : public VrmlTexture
    {
      public:
        VrmlMovieTexture();
 
        MFString                url;
        SFBool                  loop;
        SFFloat                 speed;
        SFTime                  startTime;
        SFTime                  stopTime;
        SFBool                  repeatS;
        SFBool                  repeatT;
    };
 
    typedef boost::intrusive_ptr<VrmlMovieTexture> VrmlMovieTexturePtr;
 
 
 
    // #####
    class HRP_UTIL_EXPORT  VrmlElevationGrid : public VrmlGeometry
    {
      public:
        VrmlElevationGrid();
 
        SFInt32                 xDimension;
        SFInt32                 zDimension;
        SFFloat                 xSpacing;
        SFFloat                 zSpacing;
        MFFloat                 height;
        SFBool                  ccw;
        SFBool                  colorPerVertex;
        SFFloat                 creaseAngle;
        SFBool                  normalPerVertex;
        SFBool                  solid;
        VrmlColorPtr    color;
        VrmlNormalPtr   normal;
        VrmlTextureCoordinatePtr        texCoord;
    };
 
    typedef boost::intrusive_ptr<VrmlElevationGrid> VrmlElevationGridPtr;
 
 
 
    // #####
    class HRP_UTIL_EXPORT  VrmlExtrusion : public VrmlGeometry
    {
      public:
        VrmlExtrusion();
 
        MFVec2f                 crossSection;
        MFVec3f                 spine;
        MFVec2f                 scale;
        MFRotation              orientation;
        SFBool                  beginCap;
        SFBool                  endCap;
        SFBool                  solid;
        SFBool                  ccw;
        SFBool                  convex;
        SFFloat                 creaseAngle;
    };
 
    typedef boost::intrusive_ptr<VrmlExtrusion> VrmlExtrusionPtr;
 
 
 
    class HRP_UTIL_EXPORT  VrmlSwitch : public AbstractVrmlGroup
    {
      public:
        VrmlSwitch();
 
        virtual MFNode& getChildren();
        virtual int countChildren();
        virtual VrmlNode* getChild(int index);
        virtual void replaceChild(int childIndex, VrmlNode* childNode);
 
        MFNode  choice;
        SFInt32 whichChoice;
    };
 
    typedef boost::intrusive_ptr<VrmlSwitch> VrmlSwitchPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlLOD : public AbstractVrmlGroup
    {
      public:
        VrmlLOD();
 
        virtual MFNode& getChildren();
        virtual int countChildren();
        virtual VrmlNode* getChild(int index);
        virtual void replaceChild(int childIndex, VrmlNode* childNode);
 
        MFFloat range;
        SFVec3f center;
        MFNode  level;
    };
 
    typedef boost::intrusive_ptr<VrmlLOD> VrmlLODPtr;
 
 
    class HRP_UTIL_EXPORT VrmlCollision : public VrmlGroup
    {
      public:
        VrmlCollision();
        SFBool collide;
        SFNode proxy;
    };
 
    typedef boost::intrusive_ptr<VrmlCollision> VrmlCollisionPtr;
 
 
    class HRP_UTIL_EXPORT VrmlAnchor : public VrmlGroup
    {
      public:
        VrmlAnchor();
        SFString description;
        MFString parameter;
        MFString url;
    };
 
    typedef boost::intrusive_ptr<VrmlAnchor> VrmlAnchorPtr;
 
 
    class HRP_UTIL_EXPORT VrmlBillboard : public VrmlGroup
    {
      public:
        VrmlBillboard();
        SFVec3f axisOfRotation;
    };
 
    typedef boost::intrusive_ptr<VrmlBillboard> VrmlBillboardPtr;
 
 
    class HRP_UTIL_EXPORT VrmlFog : public VrmlNode
    {
      public:
        VrmlFog();
        SFColor  color;
        SFFloat  visibilityRange;
        SFString fogType;
    };
 
    typedef boost::intrusive_ptr<VrmlFog> VrmlFogPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlWorldInfo : public VrmlNode
    {
      public:
        VrmlWorldInfo();
        SFString title;
        MFString info;
    };
 
    typedef boost::intrusive_ptr<VrmlWorldInfo> VrmlWorldInfoPtr;
 
 
    class HRP_UTIL_EXPORT VrmlPointLight : public VrmlNode
    {
      public:
        VrmlPointLight();
        SFVec3f location;
        SFBool  on;
        SFFloat intensity;
        SFColor color;
        SFFloat radius;
        SFFloat ambientIntensity;
        SFVec3f attenuation;
    };
 
    typedef boost::intrusive_ptr<VrmlPointLight> VrmlPointLightPtr;
 
 
    class HRP_UTIL_EXPORT VrmlDirectionalLight : public VrmlNode
    {
      public:
        VrmlDirectionalLight();
        SFFloat ambientIntensity;
        SFColor color;
        SFVec3f direction;
        SFFloat intensity;
        SFBool  on;
    };
 
    typedef boost::intrusive_ptr<VrmlDirectionalLight> VrmlDirectionalLightPtr;
 
 
    class HRP_UTIL_EXPORT  VrmlSpotLight : public VrmlNode
    {
      public:
        VrmlSpotLight();
        SFVec3f location;
        SFVec3f direction;
        SFBool  on;
        SFColor color;
        SFFloat intensity;
        SFFloat radius;
        SFFloat ambientIntensity;
        SFVec3f attenuation;
        SFFloat beamWidth;
        SFFloat cutOffAngle;
    };
 
    typedef boost::intrusive_ptr<VrmlSpotLight> VrmlSpotLightPtr;
 
 
 
    class HRP_UTIL_EXPORT  VrmlVariantField
    {
      private:
 
        union {
            SFInt32    sfInt32;
            SFFloat    sfFloat;
            SFVec2f    sfVec2f;
            SFVec3f    sfVec3f;
            SFRotation sfRotation;
            SFColor    sfColor;
            SFBool     sfBool;
            SFTime     sfTime;
//              SFImage    sfImage;             // #####
        } v;
 
        void* valueObj; // multi-type field object
 
        VrmlFieldTypeId typeId_;
 
        void copy(const VrmlVariantField& org);
        void deleteObj();  
 
      public:
  
        VrmlVariantField();
        VrmlVariantField(VrmlFieldTypeId typeId);
        VrmlVariantField(const VrmlVariantField& org);
        VrmlVariantField& operator=(const VrmlVariantField& org);
 
        ~VrmlVariantField();
 
        inline VrmlFieldTypeId typeId() { return typeId_; }
        void setType(VrmlFieldTypeId typeId0);
 
        inline SFInt32&    sfInt32()    { return v.sfInt32; }
        inline MFInt32&    mfInt32()    { return *((MFInt32*)valueObj); }
        inline SFFloat&    sfFloat()    { return v.sfFloat; }
        inline MFFloat&    mfFloat()    { return *((MFFloat*)valueObj); }
        inline SFTime&     sfTime()     { return v.sfFloat; }
        inline MFTime&     mfTime()     { return *((MFTime*)valueObj); }
        inline SFBool&     sfBool()     { return v.sfBool; }
        inline SFVec2f&    sfVec2f()    { return v.sfVec2f; }
        inline MFVec2f&    mfVec2f()    { return *((MFVec2f*)valueObj); }
        inline SFVec3f&    sfVec3f()    { return v.sfVec3f; }
        inline MFVec3f&    mfVec3f()    { return *((MFVec3f*)valueObj); }
        inline SFRotation& sfRotation() { return v.sfRotation; }
        inline MFRotation& mfRotation() { return *((MFRotation*)valueObj); }
        inline SFString&   sfString()   { return *((SFString*)valueObj); }
        inline MFString&   mfString()   { return *((MFString*)valueObj); }
        inline SFColor&    sfColor()    { return v.sfColor; }
        inline MFColor&    mfColor()    { return *((MFColor*)valueObj); }
        inline SFNode&     sfNode()     { return *((SFNode*)valueObj); }
        inline MFNode&     mfNode()     { return *((MFNode*)valueObj); }
        inline SFImage&    sfImage()    { return *((SFImage*)valueObj); }       // #####
 
    };
 
    typedef std::map <std::string, VrmlVariantField> TProtoFieldMap;
    typedef std::pair<std::string, VrmlVariantField> TProtoFieldPair;
 
    
    class HRP_UTIL_EXPORT  VrmlProto : public VrmlNode
    {
      public:
        std::string protoName;
        TProtoFieldMap fields;
 
        VrmlProto(const std::string& n);
 
        inline VrmlVariantField* getField(const std::string& fieldName) {
            TProtoFieldMap::iterator p = fields.find(fieldName);
            return (p != fields.end()) ? &p->second : 0;
        }
 
        inline VrmlVariantField* addField(const std::string& fieldName, VrmlFieldTypeId typeId){
            VrmlVariantField* field = &(fields[fieldName]);
            field->setType(typeId);
            return field;
        }
 
    };
    typedef boost::intrusive_ptr<VrmlProto> VrmlProtoPtr;
 
 
    class HRP_UTIL_EXPORT VrmlProtoInstance : public VrmlNode
    {
      public:
        VrmlProtoPtr proto;
        TProtoFieldMap fields;
        VrmlNodePtr actualNode;
 
        VrmlProtoInstance(VrmlProtoPtr proto0);
 
        inline VrmlVariantField* getField(const std::string& fieldName) {
            TProtoFieldMap::iterator p = fields.find(fieldName);
            return (p != fields.end()) ? &p->second : 0;
        } 
                
    };
    typedef boost::intrusive_ptr<VrmlProtoInstance> VrmlProtoInstancePtr;
 
 
    template<class VrmlNodeType>
    boost::intrusive_ptr<VrmlNodeType> dynamic_node_cast(VrmlNodePtr node) {
        VrmlProtoInstancePtr protoInstance = boost::dynamic_pointer_cast<VrmlProtoInstance>(node);
        if(protoInstance){
            return boost::dynamic_pointer_cast<VrmlNodeType>(protoInstance->actualNode);
        } else {
            return boost::dynamic_pointer_cast<VrmlNodeType>(node);
        }
    }
 
};
 
#endif