assimp/code/FBXDocument.cpp

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

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All rights reserved.

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  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
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*/

/** @file  FBXDocument.cpp
 *  @brief Implementation of the FBX DOM classes
 */
#include "AssimpPCH.h"

#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER

#include <functional>

#include "FBXParser.h"
#include "FBXDocument.h"
#include "FBXUtil.h"
#include "FBXImporter.h"
#include "FBXImportSettings.h"
#include "FBXDocumentUtil.h"
#include "FBXProperties.h"

namespace Assimp {
namespace FBX {
namespace Util {

// ------------------------------------------------------------------------------------------------
// signal DOM construction error, this is always unrecoverable. Throws DeadlyImportError.
void DOMError(const std::string& message, const Token& token)
{
	throw DeadlyImportError(Util::AddTokenText("FBX-DOM",message,&token));
}

// ------------------------------------------------------------------------------------------------
void DOMError(const std::string& message, const Element* element /*= NULL*/)
{
	if(element) {
		DOMError(message,element->KeyToken());
	}
	throw DeadlyImportError("FBX-DOM " + message);
}


// ------------------------------------------------------------------------------------------------
// print warning, do return
void DOMWarning(const std::string& message, const Token& token)
{
	if(DefaultLogger::get()) {
		DefaultLogger::get()->warn(Util::AddTokenText("FBX-DOM",message,&token));
	}
}

// ------------------------------------------------------------------------------------------------
void DOMWarning(const std::string& message, const Element* element /*= NULL*/)
{
	if(element) {
		DOMWarning(message,element->KeyToken());
		return;
	}
	if(DefaultLogger::get()) {
		DefaultLogger::get()->warn("FBX-DOM: " + message);
	}
}


// ------------------------------------------------------------------------------------------------
// extract required compound scope
const Scope& GetRequiredScope(const Element& el)
{
	const Scope* const s = el.Compound();
	if(!s) {
		DOMError("expected compound scope",&el);
	}

	return *s;
}


// ------------------------------------------------------------------------------------------------
// get token at a particular index
const Token& GetRequiredToken(const Element& el, unsigned int index)
{
	const TokenList& t = el.Tokens();
	if(index >= t.size()) {
		DOMError(Formatter::format( "missing token at index " ) << index,&el);
	}

	return *t[index];
}


// ------------------------------------------------------------------------------------------------
// wrapper around ParseTokenAsID() with DOMError handling
uint64_t ParseTokenAsID(const Token& t) 
{
	const char* err;
	const uint64_t i = ParseTokenAsID(t,err);
	if(err) {
		DOMError(err,t);
	}
	return i;
}


// ------------------------------------------------------------------------------------------------
// wrapper around ParseTokenAsDim() with DOMError handling
size_t ParseTokenAsDim(const Token& t)
{
	const char* err;
	const size_t i = ParseTokenAsDim(t,err);
	if(err) {
		DOMError(err,t);
	}
	return i;
}


// ------------------------------------------------------------------------------------------------
// wrapper around ParseTokenAsFloat() with DOMError handling
float ParseTokenAsFloat(const Token& t)
{
	const char* err;
	const float i = ParseTokenAsFloat(t,err);
	if(err) {
		DOMError(err,t);
	}
	return i;
}


// ------------------------------------------------------------------------------------------------
// wrapper around ParseTokenAsInt() with DOMError handling
int ParseTokenAsInt(const Token& t)
{
	const char* err;
	const int i = ParseTokenAsInt(t,err);
	if(err) {
		DOMError(err,t);
	}
	return i;
}


// ------------------------------------------------------------------------------------------------
// wrapper around ParseTokenAsString() with DOMError handling
std::string ParseTokenAsString(const Token& t)
{
	const char* err;
	const std::string& i = ParseTokenAsString(t,err);
	if(err) {
		DOMError(err,t);
	}
	return i;
}

// ------------------------------------------------------------------------------------------------
// extract a required element from a scope, abort if the element cannot be found
const Element& GetRequiredElement(const Scope& sc, const std::string& index, const Element* element /*= NULL*/) 
{
	const Element* el = sc[index];
	if(!el) {
		DOMError("did not find required element \"" + index + "\"",element);
	}
	return *el;
}


// ------------------------------------------------------------------------------------------------
// read an array of float3 tuples
void ReadVectorDataArray(std::vector<aiVector3D>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	// may throw bad_alloc if the input is rubbish, but this need
	// not to be prevented - importing would fail but we wouldn't
	// crash since assimp handles this case properly.
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	if (a.Tokens().size() % 3 != 0) {
		DOMError("number of floats is not a multiple of three (3)",&el);
	}
	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		aiVector3D v;
		v.x = ParseTokenAsFloat(**it++);
		v.y = ParseTokenAsFloat(**it++);
		v.z = ParseTokenAsFloat(**it++);

		out.push_back(v);
	}
}


// ------------------------------------------------------------------------------------------------
// read an array of color4 tuples
void ReadVectorDataArray(std::vector<aiColor4D>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	//  see notes in ReadVectorDataArray() above
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	if (a.Tokens().size() % 4 != 0) {
		DOMError("number of floats is not a multiple of four (4)",&el);
	}
	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		aiColor4D v;
		v.r = ParseTokenAsFloat(**it++);
		v.g = ParseTokenAsFloat(**it++);
		v.b = ParseTokenAsFloat(**it++);
		v.a = ParseTokenAsFloat(**it++);

		out.push_back(v);
	}
}


// ------------------------------------------------------------------------------------------------
// read an array of float2 tuples
void ReadVectorDataArray(std::vector<aiVector2D>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	// see notes in ReadVectorDataArray() above
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	if (a.Tokens().size() % 2 != 0) {
		DOMError("number of floats is not a multiple of two (2)",&el);
	}
	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		aiVector2D v;
		v.x = ParseTokenAsFloat(**it++);
		v.y = ParseTokenAsFloat(**it++);

		out.push_back(v);
	}
}


// ------------------------------------------------------------------------------------------------
// read an array of ints
void ReadVectorDataArray(std::vector<int>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	// see notes in ReadVectorDataArray()
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		const int ival = ParseTokenAsInt(**it++);
		out.push_back(ival);
	}
}


// ------------------------------------------------------------------------------------------------
// read an array of uints
void ReadVectorDataArray(std::vector<unsigned int>& out, const Element& el)
{
	out.clear();
	const TokenList& tok = el.Tokens();
	const size_t dim = ParseTokenAsDim(*tok[0]);

	// see notes in ReadVectorDataArray()
	out.reserve(dim);

	const Scope& scope = GetRequiredScope(el);
	const Element& a = GetRequiredElement(scope,"a",&el);

	for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
		const int ival = ParseTokenAsInt(**it++);
		if(ival < 0) {
			DOMError("encountered negative integer index");
		}
		out.push_back(static_cast<unsigned int>(ival));
	}
}


// ------------------------------------------------------------------------------------------------
// fetch a property table and the corresponding property template 
boost::shared_ptr<const PropertyTable> GetPropertyTable(const Document& doc, 
	const std::string& templateName, 
	const Element &element, 
	const Scope& sc)
{
	const Element* const Properties70 = sc["Properties70"];
	boost::shared_ptr<const PropertyTable> templateProps = boost::shared_ptr<const PropertyTable>(NULL);
	if(templateName.length()) {
		PropertyTemplateMap::const_iterator it = doc.Templates().find(templateName); 
		if(it != doc.Templates().end()) {
			templateProps = (*it).second;
		}
	}

	if(!Properties70) {
		DOMWarning("material property table (Properties70) not found",&element);
		if(templateProps) {
			return templateProps;
		}
		else {
			return boost::make_shared<const PropertyTable>();
		}
	}
	return boost::make_shared<const PropertyTable>(*Properties70,templateProps);
}
} // !Util

using namespace Util;

// ------------------------------------------------------------------------------------------------
LazyObject::LazyObject(uint64_t id, const Element& element, const Document& doc)
: doc(doc)
, element(element)
, id(id)
{

}

// ------------------------------------------------------------------------------------------------
LazyObject::~LazyObject()
{

}

// ------------------------------------------------------------------------------------------------
const Object* LazyObject::Get()
{
	if (object.get()) {
		return object.get();
	}

	const Token& key = element.KeyToken();
	const TokenList& tokens = element.Tokens();

	if(tokens.size() < 3) {
		DOMError("expected at least 3 tokens: id, name and class tag",&element);
	}

	const char* err;
	const std::string name = ParseTokenAsString(*tokens[1],err);
	if (err) {
		DOMError(err,&element);
	} 

	const std::string classtag = ParseTokenAsString(*tokens[2],err);
	if (err) {
		DOMError(err,&element);
	} 

	// XXX prevent recursive calls

	// this needs to be relatively fast since it happens a lot,
	// so avoid constructing strings all the time.
	const char* obtype = key.begin();
	const size_t length = static_cast<size_t>(key.end()-key.begin());
	if (!strncmp(obtype,"Geometry",length)) {
		if (!strcmp(classtag.c_str(),"Mesh")) {
			object.reset(new MeshGeometry(id,element,name,doc.Settings()));
		}
	}
	else if (!strncmp(obtype,"Material",length)) {
		object.reset(new Material(id,element,doc,name));
	}
	else if (!strncmp(obtype,"Texture",length)) {
		object.reset(new Texture(id,element,doc,name));
	}

	if (!object.get()) {
		//DOMError("failed to convert element to DOM object, class: " + classtag + ", name: " + name,&element);
	}

	return object.get();
}

// ------------------------------------------------------------------------------------------------
Object::Object(uint64_t id, const Element& element, const std::string& name)
: element(element)
, name(name)
, id(id)
{

}

// ------------------------------------------------------------------------------------------------
Object::~Object()
{

}


// ------------------------------------------------------------------------------------------------
Geometry::Geometry(uint64_t id, const Element& element, const std::string& name)
: Object(id, element,name)
{

}


// ------------------------------------------------------------------------------------------------
Geometry::~Geometry()
{

}


// ------------------------------------------------------------------------------------------------
Document::Document(const Parser& parser, const ImportSettings& settings)
: parser(parser)
, settings(settings)
{
	ReadPropertyTemplates();

	// this order is important, connections need parsed objects to check
	// whether connections are ok or not. Objects may not be evaluated yet,
	// though, since this may require valid connections.
	ReadObjects();
	ReadConnections();
}


// ------------------------------------------------------------------------------------------------
Document::~Document()
{
	BOOST_FOREACH(ObjectMap::value_type& v, objects) {
		delete v.second;
	}
}


// ------------------------------------------------------------------------------------------------
void Document::ReadObjects()
{
	// read ID objects from "Objects" section
	const Scope& sc = parser.GetRootScope();
	const Element* const eobjects = sc["Objects"];
	if(!eobjects || !eobjects->Compound()) {
		DOMError("no Objects dictionary found");
	}

	const Scope& sobjects = *eobjects->Compound();
	BOOST_FOREACH(const ElementMap::value_type& el, sobjects.Elements()) {
		
		// extract ID 
		const TokenList& tok = el.second->Tokens();
		
		if (tok.empty()) {
			DOMError("expected ID after object key",el.second);
		}

		const char* err;

		const uint64_t id = ParseTokenAsID(*tok[0], err);
		if(err) {
			DOMError(err,el.second);
		}

		objects[id] = new LazyObject(id, *el.second, *this);
	}
}


// ------------------------------------------------------------------------------------------------
void Document::ReadPropertyTemplates()
{
	const Scope& sc = parser.GetRootScope();
	// read property templates from "Definitions" section
	const Element* const edefs = sc["Definitions"];
	if(!edefs || !edefs->Compound()) {
		DOMWarning("no Definitions dictionary found");
		return;
	}

	const Scope& sdefs = *edefs->Compound();
	const ElementCollection otypes = sdefs.GetCollection("ObjectType");
	for(ElementMap::const_iterator it = otypes.first; it != otypes.second; ++it) {
		const Element& el = *(*it).second;
		const Scope* sc = el.Compound();
		if(!sc) {
			DOMWarning("expected nested scope in ObjectType, ignoring",&el);
			continue;
		}

		const TokenList& tok = el.Tokens();
		if(tok.empty()) {
			DOMWarning("expected name for ObjectType element, ignoring",&el);
			continue;
		}

		const std::string& oname = ParseTokenAsString(*tok[0]);

		const ElementCollection templs = sc->GetCollection("PropertyTemplate");
		for(ElementMap::const_iterator it = templs.first; it != templs.second; ++it) {
			const Element& el = *(*it).second;
			const Scope* sc = el.Compound();
			if(!sc) {
				DOMWarning("expected nested scope in PropertyTemplate, ignoring",&el);
				continue;
			}

			const TokenList& tok = el.Tokens();
			if(tok.empty()) {
				DOMWarning("expected name for PropertyTemplate element, ignoring",&el);
				continue;
			}

			const std::string& pname = ParseTokenAsString(*tok[0]);

			const Element* Properties70 = (*sc)["Properties70"];
			if(Properties70) {
				boost::shared_ptr<const PropertyTable> props = boost::make_shared<const PropertyTable>(
					*Properties70,boost::shared_ptr<const PropertyTable>(NULL)
				);

				templates[oname+"."+pname] = props;
			}
		}
	}
}



// ------------------------------------------------------------------------------------------------
void Document::ReadConnections()
{
	const Scope& sc = parser.GetRootScope();
	// read property templates from "Definitions" section
	const Element* const econns = sc["Connections"];
	if(!econns || !econns->Compound()) {
		DOMError("no Connections dictionary found");
	}

	uint64_t insertionOrder = 0l;

	const Scope& sconns = *econns->Compound();
	const ElementCollection conns = sconns.GetCollection("C");
	for(ElementMap::const_iterator it = conns.first; it != conns.second; ++it) {
		const Element& el = *(*it).second;
		const std::string& type = ParseTokenAsString(GetRequiredToken(el,0));
		const uint64_t src = ParseTokenAsID(GetRequiredToken(el,1));
		const uint64_t dest = ParseTokenAsID(GetRequiredToken(el,2));

		// OO = object-object connection
		// OP = object-property connection, in which case the destination property follows the object ID
		const std::string& prop = (type == "OP" ? ParseTokenAsString(GetRequiredToken(el,3)) : "");

		if(objects.find(src) == objects.end()) {
			DOMWarning("source object for connection does not exist",&el);
			continue;
		}

		if(objects.find(dest) == objects.end()) {
			DOMWarning("destination object for connection does not exist",&el);
			continue;
		}

		// add new connection
		const Connection* const c = new Connection(insertionOrder++,src,dest,prop,*this);
		src_connections.insert(ConnectionMap::value_type(src,c));  
		dest_connections.insert(ConnectionMap::value_type(dest,c));  
	}
}


// ------------------------------------------------------------------------------------------------
LazyObject* Document::GetObject(uint64_t id) const
{
	ObjectMap::const_iterator it = objects.find(id);
	return it == objects.end() ? NULL : (*it).second;
}

// ------------------------------------------------------------------------------------------------
std::vector<const Connection*> Document::GetConnectionsBySourceSequenced(uint64_t source) const
{
	std::vector<const Connection*> temp;

	const std::pair<ConnectionMap::const_iterator,ConnectionMap::const_iterator> range = 
		ConnectionsBySource().equal_range(source);

	temp.reserve(std::distance(range.first,range.second));
	for (ConnectionMap::const_iterator it = range.first; it != range.second; ++it) {
		temp.push_back((*it).second);
	}

	std::sort(temp.begin(), temp.end(), std::mem_fun(&Connection::CompareTo));

	return temp; // NRVO should handle this
}


// ------------------------------------------------------------------------------------------------
std::vector<const Connection*> Document::GetConnectionsByDestinationSequenced(uint64_t dest) const
{
	std::vector<const Connection*> temp;

	const std::pair<ConnectionMap::const_iterator,ConnectionMap::const_iterator> range = 
		ConnectionsByDestination().equal_range(dest);

	temp.reserve(std::distance(range.first,range.second));
	for (ConnectionMap::const_iterator it = range.first; it != range.second; ++it) {
		temp.push_back((*it).second);
	}

	std::sort(temp.begin(), temp.end(), std::mem_fun(&Connection::CompareTo));

	return temp; // NRVO should handle this
}

// ------------------------------------------------------------------------------------------------
Connection::Connection(uint64_t insertionOrder,  uint64_t src, uint64_t dest, const std::string& prop, const Document& doc)
: insertionOrder(insertionOrder)
, src(src)
, dest(dest)
, prop(prop)
, doc(doc)
{
	ai_assert(doc.Objects().find(src) != doc.Objects().end());
	ai_assert(doc.Objects().find(dest) != doc.Objects().end());
}


// ------------------------------------------------------------------------------------------------
Connection::~Connection()
{

}


// ------------------------------------------------------------------------------------------------
const Object* Connection::SourceObject() const
{
	LazyObject* const lazy = doc.GetObject(src);
	ai_assert(lazy);
	return lazy->Get();
}

// ------------------------------------------------------------------------------------------------
const Object* Connection::DestinationObject() const
{
	LazyObject* const lazy = doc.GetObject(dest);
	ai_assert(lazy);
	return lazy->Get();
}

} // !FBX
} // !Assimp

#endif