text: ﻿/*
  ---------------------------------------------------------------------------
  Open Asset Import Library (assimp)
  ---------------------------------------------------------------------------
  
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  */
  
  /// \file AMFImporter_Geometry.cpp
  /// \brief Parsing data from geometry nodes.
  /// \date 2016
  /// \author smal.root@gmail.com
  
  #ifndef ASSIMP_BUILD_NO_AMF_IMPORTER
  
  #include "AMFImporter.hpp"
  #include "AMFImporter_Macro.hpp"
  
  namespace Assimp
  {
  
  // <mesh>
  // </mesh>
  // A 3D mesh hull.
  // Multi elements - Yes.
  // Parent element - <object>.
  void AMFImporter::ParseNode_Mesh()
  {
  CAMFImporter_NodeElement* ne;
  
  	// create new mesh object.
  	ne = new CAMFImporter_NodeElement_Mesh(mNodeElement_Cur);
  	// Check for child nodes
  	if(!mReader->isEmptyElement())
  	{
  		bool vert_read = false;
  
  		ParseHelper_Node_Enter(ne);
  		MACRO_NODECHECK_LOOPBEGIN("mesh");
  			if(XML_CheckNode_NameEqual("vertices"))
  			{
  				// Check if data already defined.
  				if(vert_read) Throw_MoreThanOnceDefined("vertices", "Only one vertices set can be defined for <mesh>.");
  				// read data and set flag about it
  				ParseNode_Vertices();
  				vert_read = true;
  
  				continue;
  			}
  
  			if(XML_CheckNode_NameEqual("volume")) { ParseNode_Volume(); continue; }
  		MACRO_NODECHECK_LOOPEND("mesh");
  		ParseHelper_Node_Exit();
  	}// if(!mReader->isEmptyElement())
  	else
  	{
  		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
  	}// if(!mReader->isEmptyElement()) else
  
  	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
  }
  
  // <vertices>
  // </vertices>
  // The list of vertices to be used in defining triangles.
  // Multi elements - No.
  // Parent element - <mesh>.
  void AMFImporter::ParseNode_Vertices()
  {
  CAMFImporter_NodeElement* ne;
  
  	// create new mesh object.
  	ne = new CAMFImporter_NodeElement_Vertices(mNodeElement_Cur);
  	// Check for child nodes
  	if(!mReader->isEmptyElement())
  	{
  		ParseHelper_Node_Enter(ne);
  		MACRO_NODECHECK_LOOPBEGIN("vertices");
  			if(XML_CheckNode_NameEqual("vertex")) { ParseNode_Vertex(); continue; }
  		MACRO_NODECHECK_LOOPEND("vertices");
  		ParseHelper_Node_Exit();
  	}// if(!mReader->isEmptyElement())
  	else
  	{
  		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
  	}// if(!mReader->isEmptyElement()) else
  
  	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
  }
  
  // <vertex>
  // </vertex>
  // A vertex to be referenced in triangles.
  // Multi elements - Yes.
  // Parent element - <vertices>.
  void AMFImporter::ParseNode_Vertex()
  {
  CAMFImporter_NodeElement* ne;
  
  	// create new mesh object.
  	ne = new CAMFImporter_NodeElement_Vertex(mNodeElement_Cur);
  	// Check for child nodes
  	if(!mReader->isEmptyElement())
  	{
  		bool col_read = false;
  		bool coord_read = false;
  
  		ParseHelper_Node_Enter(ne);
  		MACRO_NODECHECK_LOOPBEGIN("vertex");
  			if(XML_CheckNode_NameEqual("color"))
  			{
  				// Check if data already defined.
  				if(col_read) Throw_MoreThanOnceDefined("color", "Only one color can be defined for <vertex>.");
  				// read data and set flag about it
  				ParseNode_Color();
  				col_read = true;
  
  				continue;
  			}
  
  			if(XML_CheckNode_NameEqual("coordinates"))
  			{
  				// Check if data already defined.
  				if(coord_read) Throw_MoreThanOnceDefined("coordinates", "Only one coordinates set can be defined for <vertex>.");
  				// read data and set flag about it
  				ParseNode_Coordinates();
  				coord_read = true;
  
  				continue;
  			}
  
  			if(XML_CheckNode_NameEqual("metadata")) { ParseNode_Metadata(); continue; }
  		MACRO_NODECHECK_LOOPEND("vertex");
  		ParseHelper_Node_Exit();
  	}// if(!mReader->isEmptyElement())
  	else
  	{
  		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
  	}// if(!mReader->isEmptyElement()) else
  
  	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
  }
  
  // <coordinates>
  // </coordinates>
  // Specifies the 3D location of this vertex.
  // Multi elements - No.
  // Parent element - <vertex>.
  //
  // Children elements:
  //   <x>, <y>, <z>
  //   Multi elements - No.
  //   X, Y, or Z coordinate, respectively, of a vertex position in space.
  void AMFImporter::ParseNode_Coordinates()
  {
  CAMFImporter_NodeElement* ne;
  
  	// create new color object.
  	ne = new CAMFImporter_NodeElement_Coordinates(mNodeElement_Cur);
  
  	CAMFImporter_NodeElement_Coordinates& als = *((CAMFImporter_NodeElement_Coordinates*)ne);// alias for convenience
  
  	// Check for child nodes
  	if(!mReader->isEmptyElement())
  	{
  		bool read_flag[3] = { false, false, false };
  
  		ParseHelper_Node_Enter(ne);
  		MACRO_NODECHECK_LOOPBEGIN("coordinates");
  			MACRO_NODECHECK_READCOMP_F("x", read_flag[0], als.Coordinate.x);
  			MACRO_NODECHECK_READCOMP_F("y", read_flag[1], als.Coordinate.y);
  			MACRO_NODECHECK_READCOMP_F("z", read_flag[2], als.Coordinate.z);
  		MACRO_NODECHECK_LOOPEND("coordinates");
  		ParseHelper_Node_Exit();
  		// check that all components was defined
  		if((read_flag[0] && read_flag[1] && read_flag[2]) == 0) throw DeadlyImportError("Not all coordinate's components are defined.");
  
  	}// if(!mReader->isEmptyElement())
  	else
  	{
  		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
  	}// if(!mReader->isEmptyElement()) else
  
  	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
  }
  
  // <volume
  // materialid="" - Which material to use.
  // type=""       - What this volume describes can be “region” or “support”. If none specified, “object” is assumed. If support, then the geometric
  //                 requirements 1-8 listed in section 5 do not need to be maintained.
  // >
  // </volume>
  // Defines a volume from the established vertex list.
  // Multi elements - Yes.
  // Parent element - <mesh>.
  void AMFImporter::ParseNode_Volume()
  {
  std::string materialid;
  std::string type;
  CAMFImporter_NodeElement* ne;
  
  	// Read attributes for node <color>.
  	MACRO_ATTRREAD_LOOPBEG;
  		MACRO_ATTRREAD_CHECK_RET("materialid", materialid, mReader->getAttributeValue);
  		MACRO_ATTRREAD_CHECK_RET("type", type, mReader->getAttributeValue);
  	MACRO_ATTRREAD_LOOPEND;
  
  	// create new object.
  	ne = new CAMFImporter_NodeElement_Volume(mNodeElement_Cur);
  	// and assign read data
  	((CAMFImporter_NodeElement_Volume*)ne)->MaterialID = materialid;
  	((CAMFImporter_NodeElement_Volume*)ne)->Type = type;
  	// Check for child nodes
  	if(!mReader->isEmptyElement())
  	{
  		bool col_read = false;
  
  		ParseHelper_Node_Enter(ne);
  		MACRO_NODECHECK_LOOPBEGIN("volume");
  			if(XML_CheckNode_NameEqual("color"))
  			{
  				// Check if data already defined.
  				if(col_read) Throw_MoreThanOnceDefined("color", "Only one color can be defined for <volume>.");
  				// read data and set flag about it
  				ParseNode_Color();
  				col_read = true;
  
  				continue;
  			}
  
  			if(XML_CheckNode_NameEqual("triangle")) { ParseNode_Triangle(); continue; }
  			if(XML_CheckNode_NameEqual("metadata")) { ParseNode_Metadata(); continue; }
  		MACRO_NODECHECK_LOOPEND("volume");
  		ParseHelper_Node_Exit();
  	}// if(!mReader->isEmptyElement())
  	else
  	{
  		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
  	}// if(!mReader->isEmptyElement()) else
  
  	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
  }
  
  // <triangle>
  // </triangle>
  // Defines a 3D triangle from three vertices, according to the right-hand rule (counter-clockwise when looking from the outside).
  // Multi elements - Yes.
  // Parent element - <volume>.
  //
  // Children elements:
  //   <v1>, <v2>, <v3>
  //   Multi elements - No.
  //   Index of the desired vertices in a triangle or edge.
  void AMFImporter::ParseNode_Triangle()
  {
  CAMFImporter_NodeElement* ne;
  
  	// create new color object.
  	ne = new CAMFImporter_NodeElement_Triangle(mNodeElement_Cur);
  
  	CAMFImporter_NodeElement_Triangle& als = *((CAMFImporter_NodeElement_Triangle*)ne);// alias for convenience
  
  	// Check for child nodes
  	if(!mReader->isEmptyElement())
  	{
  		bool col_read = false, tex_read = false;
  		bool read_flag[3] = { false, false, false };
  
  		ParseHelper_Node_Enter(ne);
  		MACRO_NODECHECK_LOOPBEGIN("triangle");
  			if(XML_CheckNode_NameEqual("color"))
  			{
  				// Check if data already defined.
  				if(col_read) Throw_MoreThanOnceDefined("color", "Only one color can be defined for <triangle>.");
  				// read data and set flag about it
  				ParseNode_Color();
  				col_read = true;
  
  				continue;
  			}
  
  			if(XML_CheckNode_NameEqual("texmap"))// new name of node: "texmap".
  			{
  				// Check if data already defined.
  				if(tex_read) Throw_MoreThanOnceDefined("texmap", "Only one texture coordinate can be defined for <triangle>.");
  				// read data and set flag about it
  				ParseNode_TexMap();
  				tex_read = true;
  
  				continue;
  			}
  			else if(XML_CheckNode_NameEqual("map"))// old name of node: "map".
  			{
  				// Check if data already defined.
  				if(tex_read) Throw_MoreThanOnceDefined("map", "Only one texture coordinate can be defined for <triangle>.");
  				// read data and set flag about it
  				ParseNode_TexMap(true);
  				tex_read = true;
  
  				continue;
  			}
  
  			MACRO_NODECHECK_READCOMP_U32("v1", read_flag[0], als.V[0]);
  			MACRO_NODECHECK_READCOMP_U32("v2", read_flag[1], als.V[1]);
  			MACRO_NODECHECK_READCOMP_U32("v3", read_flag[2], als.V[2]);
  		MACRO_NODECHECK_LOOPEND("triangle");
  		ParseHelper_Node_Exit();
  		// check that all components was defined
  		if((read_flag[0] && read_flag[1] && read_flag[2]) == 0) throw DeadlyImportError("Not all vertices of the triangle are defined.");
  
  	}// if(!mReader->isEmptyElement())
  	else
  	{
  		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
  	}// if(!mReader->isEmptyElement()) else
  
  	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
  }
  
  }// namespace Assimp
  
  #endif // !ASSIMP_BUILD_NO_AMF_IMPORTER
  