/*
Open Asset Import Library (assimp)
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*/
/// \file   X3DImporter_Rendering.cpp
/// \brief  Parsing data from nodes of "Rendering" set of X3D.
/// \date   2015-2016
/// \author smal.root@gmail.com

#ifndef ASSIMP_BUILD_NO_X3D_IMPORTER

#include "X3DImporter.hpp"
#include "X3DImporter_Macro.hpp"
#include "X3DXmlHelper.h"

namespace Assimp {

// <Color
// DEF=""           ID
// USE=""           IDREF
// color="" MFColor [inputOutput]
// />
void X3DImporter::readColor(XmlNode &node) {
    std::string use, def;
    std::list<aiColor3D> color;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    X3DXmlHelper::getColor3DListAttribute(node, "color", color);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_Color, ne);
    } else {
        // create and if needed - define new geometry object.
        ne = new X3DNodeElementColor(mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        ((X3DNodeElementColor *)ne)->Value = color;
        // check for X3DMetadataObject childs.
        if (!isNodeEmpty(node))
            childrenReadMetadata(node, ne, "Color");
        else
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <ColorRGBA
// DEF=""               ID
// USE=""               IDREF
// color="" MFColorRGBA [inputOutput]
// />
void X3DImporter::readColorRGBA(XmlNode &node) {
    std::string use, def;
    std::list<aiColor4D> color;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    X3DXmlHelper::getColor4DListAttribute(node, "color", color);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_ColorRGBA, ne);
    } else {
        // create and if needed - define new geometry object.
        ne = new X3DNodeElementColorRGBA(mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        ((X3DNodeElementColorRGBA *)ne)->Value = color;
        // check for X3DMetadataObject childs.
        if (!isNodeEmpty(node))
            childrenReadMetadata(node, ne, "ColorRGBA");
        else
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <Coordinate
// DEF=""      ID
// USE=""      IDREF
// point=""    MFVec3f [inputOutput]
// />
void X3DImporter::readCoordinate(XmlNode &node) {
    std::string use, def;
    std::list<aiVector3D> point;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    X3DXmlHelper::getVector3DListAttribute(node, "point", point);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_Coordinate, ne);
    } else {
        // create and if needed - define new geometry object.
        ne = new X3DNodeElementCoordinate(mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        ((X3DNodeElementCoordinate *)ne)->Value = point;
        // check for X3DMetadataObject childs.
        if (!isNodeEmpty(node))
            childrenReadMetadata(node, ne, "Coordinate");
        else
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <IndexedLineSet
// DEF=""                ID
// USE=""                IDREF
// colorIndex=""         MFInt32 [initializeOnly]
// colorPerVertex="true" SFBool  [initializeOnly]
// coordIndex=""         MFInt32 [initializeOnly]
// >
//    <!-- ColorCoordinateContentModel -->
// ColorCoordinateContentModel is the child-node content model corresponding to IndexedLineSet, LineSet and PointSet. ColorCoordinateContentModel can
// contain any-order Coordinate node with Color (or ColorRGBA) node. No more than one instance of any single node type is allowed.
// A ProtoInstance node (with the proper node type) can be substituted for any node in this content model.
// </IndexedLineSet>
void X3DImporter::readIndexedLineSet(XmlNode &node) {
    std::string use, def;
    std::vector<int32_t> colorIndex;
    bool colorPerVertex = true;
    std::vector<int32_t> coordIndex;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    X3DXmlHelper::getInt32ArrayAttribute(node, "colorIndex", colorIndex);
    XmlParser::getBoolAttribute(node, "colorPerVertex", colorPerVertex);
    X3DXmlHelper::getInt32ArrayAttribute(node, "coordIndex", coordIndex);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_IndexedLineSet, ne);
    } else {
        // check data
        if ((coordIndex.size() < 2) || ((coordIndex.back() == (-1)) && (coordIndex.size() < 3)))
            throw DeadlyImportError("IndexedLineSet must contain not empty \"coordIndex\" attribute.");

        // create and if needed - define new geometry object.
        ne = new X3DNodeElementIndexedSet(X3DElemType::ENET_IndexedLineSet, mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        X3DNodeElementIndexedSet &ne_alias = *((X3DNodeElementIndexedSet *)ne);

        ne_alias.ColorIndex = colorIndex;
        ne_alias.ColorPerVertex = colorPerVertex;
        ne_alias.CoordIndex = coordIndex;
        // check for child nodes
        if (!isNodeEmpty(node)) {
            ParseHelper_Node_Enter(ne);
            for (auto currentChildNode : node.children()) {
                const std::string &currentChildName = currentChildNode.name();
                // check for Color and Coordinate nodes
                if (currentChildName == "Color")
                    readColor(currentChildNode);
                else if (currentChildName == "ColorRGBA")
                    readColorRGBA(currentChildNode);
                else if (currentChildName == "Coordinate")
                    readCoordinate(currentChildNode);
                // check for X3DMetadataObject
                else if (!checkForMetadataNode(currentChildNode))
                    skipUnsupportedNode("IndexedLineSet", currentChildNode);
            }
            ParseHelper_Node_Exit();
        } // if(!isNodeEmpty(node))
        else {
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element
        }

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <IndexedTriangleFanSet
// DEF=""                 ID
// USE=""                 IDREF
// ccw="true"             SFBool  [initializeOnly]
// colorPerVertex="true"  SFBool  [initializeOnly]
// index=""               MFInt32 [initializeOnly]
// normalPerVertex="true" SFBool  [initializeOnly]
// solid="true"           SFBool  [initializeOnly]
// >
//    <!-- ComposedGeometryContentModel -->
// ComposedGeometryContentModel is the child-node content model corresponding to X3DComposedGeometryNodes. It can contain Color (or ColorRGBA), Coordinate,
// Normal and TextureCoordinate, in any order. No more than one instance of these nodes is allowed. Multiple VertexAttribute (FloatVertexAttribute,
// Matrix3VertexAttribute, Matrix4VertexAttribute) nodes can also be contained.
// A ProtoInstance node (with the proper node type) can be substituted for any node in this content model.
// </IndexedTriangleFanSet>
void X3DImporter::readIndexedTriangleFanSet(XmlNode &node) {
    std::string use, def;
    bool ccw = true;
    bool colorPerVertex = true;
    std::vector<int32_t> index;
    bool normalPerVertex = true;
    bool solid = true;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    XmlParser::getBoolAttribute(node, "ccw", ccw);
    XmlParser::getBoolAttribute(node, "colorPerVertex", colorPerVertex);
    X3DXmlHelper::getInt32ArrayAttribute(node, "index", index);
    XmlParser::getBoolAttribute(node, "normalPerVertex", normalPerVertex);
    XmlParser::getBoolAttribute(node, "solid", solid);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_IndexedTriangleFanSet, ne);
    } else {
        // check data
        if (index.size() == 0) throw DeadlyImportError("IndexedTriangleFanSet must contain not empty \"index\" attribute.");

        // create and if needed - define new geometry object.
        ne = new X3DNodeElementIndexedSet(X3DElemType::ENET_IndexedTriangleFanSet, mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        X3DNodeElementIndexedSet &ne_alias = *((X3DNodeElementIndexedSet *)ne);

        ne_alias.CCW = ccw;
        ne_alias.ColorPerVertex = colorPerVertex;
        ne_alias.NormalPerVertex = normalPerVertex;
        ne_alias.Solid = solid;

        ne_alias.CoordIndex.clear();
        int counter = 0;
        int32_t idx[3];
        for (std::vector<int32_t>::const_iterator idx_it = index.begin(); idx_it != index.end(); ++idx_it) {
            idx[2] = *idx_it;
            if (idx[2] < 0) {
                counter = 0;
            } else {
                if (counter >= 2) {
                    if (ccw) {
                        ne_alias.CoordIndex.push_back(idx[0]);
                        ne_alias.CoordIndex.push_back(idx[1]);
                        ne_alias.CoordIndex.push_back(idx[2]);
                    } else {
                        ne_alias.CoordIndex.push_back(idx[0]);
                        ne_alias.CoordIndex.push_back(idx[2]);
                        ne_alias.CoordIndex.push_back(idx[1]);
                    }
                    ne_alias.CoordIndex.push_back(-1);
                    idx[1] = idx[2];
                } else {
                    idx[counter] = idx[2];
                }
                ++counter;
            }
        } // for(std::list<int32_t>::const_iterator idx_it = index.begin(); idx_it != ne_alias.index.end(); idx_it++)

        // check for child nodes
        if (!isNodeEmpty(node)) {
            ParseHelper_Node_Enter(ne);
            for (auto currentChildNode : node.children()) {
                const std::string &currentChildName = currentChildNode.name();
                // check for X3DComposedGeometryNodes
                if (currentChildName == "Color")
                    readColor(currentChildNode);
                else if (currentChildName == "ColorRGBA")
                    readColorRGBA(currentChildNode);
                else if (currentChildName == "Coordinate")
                    readCoordinate(currentChildNode);
                else if (currentChildName == "Normal")
                    readNormal(currentChildNode);
                else if (currentChildName == "TextureCoordinate")
                    readTextureCoordinate(currentChildNode);
                // check for X3DMetadataObject
                else if (!checkForMetadataNode(currentChildNode))
                    skipUnsupportedNode("IndexedTriangleFanSet", currentChildNode);
            }
            ParseHelper_Node_Exit();
        } // if(!isNodeEmpty(node))
        else {
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element
        }

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <IndexedTriangleSet
// DEF=""                 ID
// USE=""                 IDREF
// ccw="true"             SFBool  [initializeOnly]
// colorPerVertex="true"  SFBool  [initializeOnly]
// index=""               MFInt32 [initializeOnly]
// normalPerVertex="true" SFBool  [initializeOnly]
// solid="true"           SFBool  [initializeOnly]
// >
//    <!-- ComposedGeometryContentModel -->
// ComposedGeometryContentModel is the child-node content model corresponding to X3DComposedGeometryNodes. It can contain Color (or ColorRGBA), Coordinate,
// Normal and TextureCoordinate, in any order. No more than one instance of these nodes is allowed. Multiple VertexAttribute (FloatVertexAttribute,
// Matrix3VertexAttribute, Matrix4VertexAttribute) nodes can also be contained.
// A ProtoInstance node (with the proper node type) can be substituted for any node in this content model.
// </IndexedTriangleSet>
void X3DImporter::readIndexedTriangleSet(XmlNode &node) {
    std::string use, def;
    bool ccw = true;
    bool colorPerVertex = true;
    std::vector<int32_t> index;
    bool normalPerVertex = true;
    bool solid = true;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    XmlParser::getBoolAttribute(node, "ccw", ccw);
    XmlParser::getBoolAttribute(node, "colorPerVertex", colorPerVertex);
    X3DXmlHelper::getInt32ArrayAttribute(node, "index", index);
    XmlParser::getBoolAttribute(node, "normalPerVertex", normalPerVertex);
    XmlParser::getBoolAttribute(node, "solid", solid);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_IndexedTriangleSet, ne);
    } else {
        // check data
        if (index.size() == 0) throw DeadlyImportError("IndexedTriangleSet must contain not empty \"index\" attribute.");

        // create and if needed - define new geometry object.
        ne = new X3DNodeElementIndexedSet(X3DElemType::ENET_IndexedTriangleSet, mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        X3DNodeElementIndexedSet &ne_alias = *((X3DNodeElementIndexedSet *)ne);

        ne_alias.CCW = ccw;
        ne_alias.ColorPerVertex = colorPerVertex;
        ne_alias.NormalPerVertex = normalPerVertex;
        ne_alias.Solid = solid;

        ne_alias.CoordIndex.clear();
        int counter = 0;
        int32_t idx[3];
        for (std::vector<int32_t>::const_iterator idx_it = index.begin(); idx_it != index.end(); ++idx_it) {
            idx[counter++] = *idx_it;
            if (counter > 2) {
                counter = 0;
                if (ccw) {
                    ne_alias.CoordIndex.push_back(idx[0]);
                    ne_alias.CoordIndex.push_back(idx[1]);
                    ne_alias.CoordIndex.push_back(idx[2]);
                } else {
                    ne_alias.CoordIndex.push_back(idx[0]);
                    ne_alias.CoordIndex.push_back(idx[2]);
                    ne_alias.CoordIndex.push_back(idx[1]);
                }
                ne_alias.CoordIndex.push_back(-1);
            }
        } // for(std::list<int32_t>::const_iterator idx_it = index.begin(); idx_it != ne_alias.index.end(); idx_it++)

        // check for child nodes
        if (!isNodeEmpty(node)) {
            ParseHelper_Node_Enter(ne);
            for (auto currentChildNode : node.children()) {
                const std::string &currentChildName = currentChildNode.name();
                // check for X3DComposedGeometryNodes
                if (currentChildName == "Color")
                    readColor(currentChildNode);
                else if (currentChildName == "ColorRGBA")
                    readColorRGBA(currentChildNode);
                else if (currentChildName == "Coordinate")
                    readCoordinate(currentChildNode);
                else if (currentChildName == "Normal")
                    readNormal(currentChildNode);
                else if (currentChildName == "TextureCoordinate")
                    readTextureCoordinate(currentChildNode);
                // check for X3DMetadataObject
                else if (!checkForMetadataNode(currentChildNode))
                    skipUnsupportedNode("IndexedTriangleSet", currentChildNode);
            }
            ParseHelper_Node_Exit();
        } // if(!isNodeEmpty(node))
        else {
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element
        }

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <IndexedTriangleStripSet
// DEF=""                 ID
// USE=""                 IDREF
// ccw="true"             SFBool  [initializeOnly]
// colorPerVertex="true"  SFBool  [initializeOnly]
// index=""               MFInt32 [initializeOnly]
// normalPerVertex="true" SFBool  [initializeOnly]
// solid="true"           SFBool  [initializeOnly]
// >
//    <!-- ComposedGeometryContentModel -->
// ComposedGeometryContentModel is the child-node content model corresponding to X3DComposedGeometryNodes. It can contain Color (or ColorRGBA), Coordinate,
// Normal and TextureCoordinate, in any order. No more than one instance of these nodes is allowed. Multiple VertexAttribute (FloatVertexAttribute,
// Matrix3VertexAttribute, Matrix4VertexAttribute) nodes can also be contained.
// A ProtoInstance node (with the proper node type) can be substituted for any node in this content model.
// </IndexedTriangleStripSet>
void X3DImporter::readIndexedTriangleStripSet(XmlNode &node) {
    std::string use, def;
    bool ccw = true;
    bool colorPerVertex = true;
    std::vector<int32_t> index;
    bool normalPerVertex = true;
    bool solid = true;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    XmlParser::getBoolAttribute(node, "ccw", ccw);
    XmlParser::getBoolAttribute(node, "colorPerVertex", colorPerVertex);
    X3DXmlHelper::getInt32ArrayAttribute(node, "index", index);
    XmlParser::getBoolAttribute(node, "normalPerVertex", normalPerVertex);
    XmlParser::getBoolAttribute(node, "solid", solid);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_IndexedTriangleStripSet, ne);
    } else {
        // check data
        if (index.empty()) {
            throw DeadlyImportError("IndexedTriangleStripSet must contain not empty \"index\" attribute.");
        }

        // create and if needed - define new geometry object.
        ne = new X3DNodeElementIndexedSet(X3DElemType::ENET_IndexedTriangleStripSet, mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        X3DNodeElementIndexedSet &ne_alias = *((X3DNodeElementIndexedSet *)ne);

        ne_alias.CCW = ccw;
        ne_alias.ColorPerVertex = colorPerVertex;
        ne_alias.NormalPerVertex = normalPerVertex;
        ne_alias.Solid = solid;

        ne_alias.CoordIndex.clear();
        int counter = 0;
        int32_t idx[3];
        for (std::vector<int32_t>::const_iterator idx_it = index.begin(); idx_it != index.end(); ++idx_it) {
            idx[2] = *idx_it;
            if (idx[2] < 0) {
                counter = 0;
            } else {
                if (counter >= 2) {
                    if (ccw) {
                        ne_alias.CoordIndex.push_back(idx[0]);
                        ne_alias.CoordIndex.push_back(idx[1]);
                        ne_alias.CoordIndex.push_back(idx[2]);
                    } else {
                        ne_alias.CoordIndex.push_back(idx[0]);
                        ne_alias.CoordIndex.push_back(idx[2]);
                        ne_alias.CoordIndex.push_back(idx[1]);
                    }
                    ne_alias.CoordIndex.push_back(-1);
                }
                idx[counter & 1] = idx[2];
                ++counter;
            }
        } // for(std::list<int32_t>::const_iterator idx_it = index.begin(); idx_it != ne_alias.index.end(); idx_it++)

        // check for child nodes
        if (!isNodeEmpty(node)) {
            ParseHelper_Node_Enter(ne);
            for (auto currentChildNode : node.children()) {
                const std::string &currentChildName = currentChildNode.name();
                // check for X3DComposedGeometryNodes
                if (currentChildName == "Color")
                    readColor(currentChildNode);
                else if (currentChildName == "ColorRGBA")
                    readColorRGBA(currentChildNode);
                else if (currentChildName == "Coordinate")
                    readCoordinate(currentChildNode);
                else if (currentChildName == "Normal")
                    readNormal(currentChildNode);
                else if (currentChildName == "TextureCoordinate")
                    readTextureCoordinate(currentChildNode);
                // check for X3DMetadataObject
                else if (!checkForMetadataNode(currentChildNode))
                    skipUnsupportedNode("IndexedTriangleStripSet", currentChildNode);
            }
            ParseHelper_Node_Exit();
        } // if(!isNodeEmpty(node))
        else {
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element
        }

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <LineSet
// DEF=""         ID
// USE=""         IDREF
// vertexCount="" MFInt32 [initializeOnly]
// >
//    <!-- ColorCoordinateContentModel -->
// ColorCoordinateContentModel is the child-node content model corresponding to IndexedLineSet, LineSet and PointSet. ColorCoordinateContentModel can
// contain any-order Coordinate node with Color (or ColorRGBA) node. No more than one instance of any single node type is allowed.
// A ProtoInstance node (with the proper node type) can be substituted for any node in this content model.
// </LineSet>
void X3DImporter::readLineSet(XmlNode &node) {
    std::string use, def;
    std::vector<int32_t> vertexCount;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    X3DXmlHelper::getInt32ArrayAttribute(node, "vertexCount", vertexCount);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_LineSet, ne);
    } else {
        // check data
        if (vertexCount.empty()) {
            throw DeadlyImportError("LineSet must contain not empty \"vertexCount\" attribute.");
        }

        // create and if needed - define new geometry object.
        ne = new X3DNodeElementSet(X3DElemType::ENET_LineSet, mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        X3DNodeElementSet &ne_alias = *((X3DNodeElementSet *)ne);

        ne_alias.VertexCount = vertexCount;
        // create CoordIdx
        size_t coord_num = 0;

        ne_alias.CoordIndex.clear();
        for (std::vector<int32_t>::const_iterator vc_it = ne_alias.VertexCount.begin(); vc_it != ne_alias.VertexCount.end(); ++vc_it) {
            if (*vc_it < 2) throw DeadlyImportError("LineSet. vertexCount shall be greater than or equal to two.");

            for (int32_t i = 0; i < *vc_it; i++)
                ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num++)); // add vertices indices

            ne_alias.CoordIndex.push_back(-1); // add face delimiter.
        }

        // check for child nodes
        if (!isNodeEmpty(node)) {
            ParseHelper_Node_Enter(ne);
            for (auto currentChildNode : node.children()) {
                const std::string &currentChildName = currentChildNode.name();
                // check for X3DComposedGeometryNodes
                if (currentChildName == "Color")
                    readColor(currentChildNode);
                else if (currentChildName == "ColorRGBA")
                    readColorRGBA(currentChildNode);
                else if (currentChildName == "Coordinate")
                    readCoordinate(currentChildNode);
                // check for X3DMetadataObject
                else if (!checkForMetadataNode(currentChildNode))
                    skipUnsupportedNode("LineSet", currentChildNode);
            }
            ParseHelper_Node_Exit();
        } // if(!isNodeEmpty(node))
        else {
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element
        }

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <PointSet
// DEF="" ID
// USE="" IDREF
// >
//    <!-- ColorCoordinateContentModel -->
// ColorCoordinateContentModel is the child-node content model corresponding to IndexedLineSet, LineSet and PointSet. ColorCoordinateContentModel can
// contain any-order Coordinate node with Color (or ColorRGBA) node. No more than one instance of any single node type is allowed.
// A ProtoInstance node (with the proper node type) can be substituted for any node in this content model.
// </PointSet>
void X3DImporter::readPointSet(XmlNode &node) {
    std::string use, def;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_PointSet, ne);
    } else {
        // create and if needed - define new geometry object.
        ne = new X3DNodeElementIndexedSet(X3DElemType::ENET_PointSet, mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        // check for child nodes
        if (!isNodeEmpty(node)) {
            ParseHelper_Node_Enter(ne);
            for (auto currentChildNode : node.children()) {
                const std::string &currentChildName = currentChildNode.name();
                // check for X3DComposedGeometryNodes
                if (currentChildName == "Color")
                    readColor(currentChildNode);
                else if (currentChildName == "ColorRGBA")
                    readColorRGBA(currentChildNode);
                else if (currentChildName == "Coordinate")
                    readCoordinate(currentChildNode);
                // check for X3DMetadataObject
                else if (!checkForMetadataNode(currentChildNode))
                    skipUnsupportedNode("PointSet", currentChildNode);
            }
            ParseHelper_Node_Exit();
        } // if(!isNodeEmpty(node))
        else {
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element
        }

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <TriangleFanSet
// DEF=""                 ID
// USE=""                 IDREF
// ccw="true"             SFBool  [initializeOnly]
// colorPerVertex="true"  SFBool  [initializeOnly]
// fanCount=""            MFInt32 [inputOutput]
// normalPerVertex="true" SFBool  [initializeOnly]
// solid="true"           SFBool  [initializeOnly]
// >
//    <!-- ComposedGeometryContentModel -->
// ComposedGeometryContentModel is the child-node content model corresponding to X3DComposedGeometryNodes. It can contain Color (or ColorRGBA), Coordinate,
// Normal and TextureCoordinate, in any order. No more than one instance of these nodes is allowed. Multiple VertexAttribute (FloatVertexAttribute,
// Matrix3VertexAttribute, Matrix4VertexAttribute) nodes can also be contained.
// A ProtoInstance node (with the proper node type) can be substituted for any node in this content model.
// </TriangleFanSet>
void X3DImporter::readTriangleFanSet(XmlNode &node) {
    std::string use, def;
    bool ccw = true;
    bool colorPerVertex = true;
    std::vector<int32_t> fanCount;
    bool normalPerVertex = true;
    bool solid = true;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    XmlParser::getBoolAttribute(node, "ccw", ccw);
    XmlParser::getBoolAttribute(node, "colorPerVertex", colorPerVertex);
    X3DXmlHelper::getInt32ArrayAttribute(node, "fanCount", fanCount);
    XmlParser::getBoolAttribute(node, "normalPerVertex", normalPerVertex);
    XmlParser::getBoolAttribute(node, "solid", solid);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_TriangleFanSet, ne);
    } else {
        // check data
        if (fanCount.empty()) {
            throw DeadlyImportError("TriangleFanSet must contain not empty \"fanCount\" attribute.");
        }

        // create and if needed - define new geometry object.
        ne = new X3DNodeElementSet(X3DElemType::ENET_TriangleFanSet, mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        X3DNodeElementSet &ne_alias = *((X3DNodeElementSet *)ne);

        ne_alias.CCW = ccw;
        ne_alias.ColorPerVertex = colorPerVertex;
        ne_alias.VertexCount = fanCount;
        ne_alias.NormalPerVertex = normalPerVertex;
        ne_alias.Solid = solid;
        // create CoordIdx
        size_t coord_num_first, coord_num_prev;

        ne_alias.CoordIndex.clear();
        // assign indices for first triangle
        coord_num_first = 0;
        coord_num_prev = 1;
        for (std::vector<int32_t>::const_iterator vc_it = ne_alias.VertexCount.begin(); vc_it != ne_alias.VertexCount.end(); ++vc_it) {
            if (*vc_it < 3) throw DeadlyImportError("TriangleFanSet. fanCount shall be greater than or equal to three.");

            for (int32_t vc = 2; vc < *vc_it; vc++) {
                if (ccw) {
                    // 2 1
                    //  0
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num_first)); // first vertex is a center and always is [0].
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num_prev++));
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num_prev));
                } else {
                    // 1 2
                    //  0
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num_first)); // first vertex is a center and always is [0].
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num_prev + 1));
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num_prev++));
                } // if(ccw) else

                ne_alias.CoordIndex.push_back(-1); // add face delimiter.
            } // for(int32_t vc = 2; vc < *vc_it; vc++)

            coord_num_prev++; // that index will be center of next fan
            coord_num_first = coord_num_prev++; // forward to next point - second point of fan
        } // for(std::list<int32_t>::const_iterator vc_it = ne_alias.VertexCount.begin(); vc_it != ne_alias.VertexCount.end(); vc_it++)
        // check for child nodes
        if (!isNodeEmpty(node)) {
            ParseHelper_Node_Enter(ne);
            for (auto currentChildNode : node.children()) {
                const std::string &currentChildName = currentChildNode.name();
                // check for X3DComposedGeometryNodes
                if (currentChildName == "Color")
                    readColor(currentChildNode);
                else if (currentChildName == "ColorRGBA")
                    readColorRGBA(currentChildNode);
                else if (currentChildName == "Coordinate")
                    readCoordinate(currentChildNode);
                else if (currentChildName == "Normal")
                    readNormal(currentChildNode);
                else if (currentChildName == "TextureCoordinate")
                    readTextureCoordinate(currentChildNode);
                // check for X3DMetadataObject
                else if (!checkForMetadataNode(currentChildNode))
                    skipUnsupportedNode("TriangleFanSet", currentChildNode);
            }
            ParseHelper_Node_Exit();
        } // if(!isNodeEmpty(node))
        else {
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element
        }

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <TriangleSet
// DEF=""                 ID
// USE=""                 IDREF
// ccw="true"             SFBool  [initializeOnly]
// colorPerVertex="true"  SFBool  [initializeOnly]
// normalPerVertex="true" SFBool  [initializeOnly]
// solid="true"           SFBool  [initializeOnly]
// >
//    <!-- ComposedGeometryContentModel -->
// ComposedGeometryContentModel is the child-node content model corresponding to X3DComposedGeometryNodes. It can contain Color (or ColorRGBA), Coordinate,
// Normal and TextureCoordinate, in any order. No more than one instance of these nodes is allowed. Multiple VertexAttribute (FloatVertexAttribute,
// Matrix3VertexAttribute, Matrix4VertexAttribute) nodes can also be contained.
// A ProtoInstance node (with the proper node type) can be substituted for any node in this content model.
// </TriangleSet>
void X3DImporter::readTriangleSet(XmlNode &node) {
    std::string use, def;
    bool ccw = true;
    bool colorPerVertex = true;
    bool normalPerVertex = true;
    bool solid = true;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    XmlParser::getBoolAttribute(node, "ccw", ccw);
    XmlParser::getBoolAttribute(node, "colorPerVertex", colorPerVertex);
    XmlParser::getBoolAttribute(node, "normalPerVertex", normalPerVertex);
    XmlParser::getBoolAttribute(node, "solid", solid);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_TriangleSet, ne);
    } else {
        // create and if needed - define new geometry object.
        ne = new X3DNodeElementIndexedSet(X3DElemType::ENET_TriangleSet, mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        X3DNodeElementSet &ne_alias = *((X3DNodeElementSet *)ne);

        ne_alias.CCW = ccw;
        ne_alias.ColorPerVertex = colorPerVertex;
        ne_alias.NormalPerVertex = normalPerVertex;
        ne_alias.Solid = solid;
        // check for child nodes
        if (!isNodeEmpty(node)) {
            ParseHelper_Node_Enter(ne);
            for (auto currentChildNode : node.children()) {
                const std::string &currentChildName = currentChildNode.name();
                // check for X3DComposedGeometryNodes
                if (currentChildName == "Color")
                    readColor(currentChildNode);
                else if (currentChildName == "ColorRGBA")
                    readColorRGBA(currentChildNode);
                else if (currentChildName == "Coordinate")
                    readCoordinate(currentChildNode);
                else if (currentChildName == "Normal")
                    readNormal(currentChildNode);
                else if (currentChildName == "TextureCoordinate")
                    readTextureCoordinate(currentChildNode);
                // check for X3DMetadataObject
                else if (!checkForMetadataNode(currentChildNode))
                    skipUnsupportedNode("TriangleSet", currentChildNode);
            }
            ParseHelper_Node_Exit();
        } // if(!isNodeEmpty(node))
        else {
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element
        }

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <TriangleStripSet
// DEF=""                 ID
// USE=""                 IDREF
// ccw="true"             SFBool  [initializeOnly]
// colorPerVertex="true"  SFBool  [initializeOnly]
// normalPerVertex="true" SFBool  [initializeOnly]
// solid="true"           SFBool  [initializeOnly]
// stripCount=""          MFInt32 [inputOutput]
// >
//    <!-- ComposedGeometryContentModel -->
// ComposedGeometryContentModel is the child-node content model corresponding to X3DComposedGeometryNodes. It can contain Color (or ColorRGBA), Coordinate,
// Normal and TextureCoordinate, in any order. No more than one instance of these nodes is allowed. Multiple VertexAttribute (FloatVertexAttribute,
// Matrix3VertexAttribute, Matrix4VertexAttribute) nodes can also be contained.
// A ProtoInstance node (with the proper node type) can be substituted for any node in this content model.
// </TriangleStripSet>
void X3DImporter::readTriangleStripSet(XmlNode &node) {
    std::string use, def;
    bool ccw = true;
    bool colorPerVertex = true;
    std::vector<int32_t> stripCount;
    bool normalPerVertex = true;
    bool solid = true;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    XmlParser::getBoolAttribute(node, "ccw", ccw);
    XmlParser::getBoolAttribute(node, "colorPerVertex", colorPerVertex);
    X3DXmlHelper::getInt32ArrayAttribute(node, "stripCount", stripCount);
    XmlParser::getBoolAttribute(node, "normalPerVertex", normalPerVertex);
    XmlParser::getBoolAttribute(node, "solid", solid);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_TriangleStripSet, ne);
    } else {
        // check data
        if (stripCount.size() == 0) throw DeadlyImportError("TriangleStripSet must contain not empty \"stripCount\" attribute.");

        // create and if needed - define new geometry object.
        ne = new X3DNodeElementSet(X3DElemType::ENET_TriangleStripSet, mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        X3DNodeElementSet &ne_alias = *((X3DNodeElementSet *)ne);

        ne_alias.CCW = ccw;
        ne_alias.ColorPerVertex = colorPerVertex;
        ne_alias.VertexCount = stripCount;
        ne_alias.NormalPerVertex = normalPerVertex;
        ne_alias.Solid = solid;
        // create CoordIdx
        size_t coord_num0, coord_num1, coord_num2; // indices of current triangle
        bool odd_tri; // sequence of current triangle
        size_t coord_num_sb; // index of first point of strip

        ne_alias.CoordIndex.clear();
        coord_num_sb = 0;
        for (std::vector<int32_t>::const_iterator vc_it = ne_alias.VertexCount.begin(); vc_it != ne_alias.VertexCount.end(); ++vc_it) {
            if (*vc_it < 3) throw DeadlyImportError("TriangleStripSet. stripCount shall be greater than or equal to three.");

            // set initial values for first triangle
            coord_num0 = coord_num_sb;
            coord_num1 = coord_num_sb + 1;
            coord_num2 = coord_num_sb + 2;
            odd_tri = true;

            for (int32_t vc = 2; vc < *vc_it; vc++) {
                if (ccw) {
                    // 0 2
                    //  1
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num0));
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num1));
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num2));
                } else {
                    // 0 1
                    //  2
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num0));
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num2));
                    ne_alias.CoordIndex.push_back(static_cast<int32_t>(coord_num1));
                } // if(ccw) else

                ne_alias.CoordIndex.push_back(-1); // add face delimiter.
                // prepare values for next triangle
                if (odd_tri) {
                    coord_num0 = coord_num2;
                    coord_num2++;
                } else {
                    coord_num1 = coord_num2;
                    coord_num2 = coord_num1 + 1;
                }

                odd_tri = !odd_tri;
                coord_num_sb = coord_num2; // that index will be start of next strip
            } // for(int32_t vc = 2; vc < *vc_it; vc++)
        } // for(std::list<int32_t>::const_iterator vc_it = ne_alias.VertexCount.begin(); vc_it != ne_alias.VertexCount.end(); vc_it++)
        // check for child nodes
        if (!isNodeEmpty(node)) {
            ParseHelper_Node_Enter(ne);
            for (auto currentChildNode : node.children()) {
                const std::string &currentChildName = currentChildNode.name();
                // check for X3DComposedGeometryNodes
                if (currentChildName == "Color")
                    readColor(currentChildNode);
                else if (currentChildName == "ColorRGBA")
                    readColorRGBA(currentChildNode);
                else if (currentChildName == "Coordinate")
                    readCoordinate(currentChildNode);
                else if (currentChildName == "Normal")
                    readNormal(currentChildNode);
                else if (currentChildName == "TextureCoordinate")
                    readTextureCoordinate(currentChildNode);
                // check for X3DMetadataObject
                else if (!checkForMetadataNode(currentChildNode))
                    skipUnsupportedNode("TriangleStripSet", currentChildNode);
            }
            ParseHelper_Node_Exit();
        } // if(!isNodeEmpty(node))
        else {
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element
        }

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

// <Normal
// DEF=""      ID
// USE=""      IDREF
// vector=""   MFVec3f [inputOutput]
// />
void X3DImporter::readNormal(XmlNode &node) {
    std::string use, def;
    std::list<aiVector3D> vector;
    X3DNodeElementBase *ne=nullptr;

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    X3DXmlHelper::getVector3DListAttribute(node, "vector", vector);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        ne = MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_Normal, ne);
    } else {
        // create and if needed - define new geometry object.
        ne = new X3DNodeElementNormal(mNodeElementCur);
        if (!def.empty()) ne->ID = def;

        ((X3DNodeElementNormal *)ne)->Value = vector;
        // check for X3DMetadataObject childs.
        if (!isNodeEmpty(node))
            childrenReadMetadata(node, ne, "Normal");
        else
            mNodeElementCur->Children.push_back(ne); // add made object as child to current element

        NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
    } // if(!use.empty()) else
}

} // namespace Assimp

#endif // !ASSIMP_BUILD_NO_X3D_IMPORTER