assimp/code/FBXProperties.cpp

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

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*/

/** @file  FBXProperties.cpp
 *  @brief Implementation of the FBX dynamic properties system
 */

#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER

#include "FBXTokenizer.h"
#include "FBXParser.h"
#include "FBXDocument.h"
#include "FBXDocumentUtil.h"
#include "FBXProperties.h"
#include <boost/foreach.hpp>

namespace Assimp {
namespace FBX {

	using namespace Util;

// ------------------------------------------------------------------------------------------------
Property::Property()
{
}

// ------------------------------------------------------------------------------------------------
Property::~Property()
{
}

namespace {

// ------------------------------------------------------------------------------------------------
// read a typed property out of a FBX element. The return value is NULL if the property cannot be read.
Property* ReadTypedProperty(const Element& element)
{
	ai_assert(element.KeyToken().StringContents() == "P");

	const TokenList& tok = element.Tokens();
	ai_assert(tok.size() >= 5);

	const std::string& s = ParseTokenAsString(*tok[1]);
	const char* const cs = s.c_str();
	if (!strcmp(cs,"KString")) {
		return new TypedProperty<std::string>(ParseTokenAsString(*tok[4]));
	}
	else if (!strcmp(cs,"bool") || !strcmp(cs,"Bool")) {
		return new TypedProperty<bool>(ParseTokenAsInt(*tok[4]) != 0);
	}
	else if (!strcmp(cs, "int") || !strcmp(cs, "Int") || !strcmp(cs, "enum") || !strcmp(cs, "Enum")) {
		return new TypedProperty<int>(ParseTokenAsInt(*tok[4]));
	}
	else if (!strcmp(cs, "ULongLong")) {
		return new TypedProperty<uint64_t>(ParseTokenAsID(*tok[4]));
	}
	else if (!strcmp(cs, "KTime")) {
		return new TypedProperty<int64_t>(ParseTokenAsInt64(*tok[4]));
	}
	else if (!strcmp(cs,"Vector3D") || 
		!strcmp(cs,"ColorRGB") || 
		!strcmp(cs,"Vector") || 
		!strcmp(cs,"Color") || 
		!strcmp(cs,"Lcl Translation") || 
		!strcmp(cs,"Lcl Rotation") || 
		!strcmp(cs,"Lcl Scaling")
		) {
		return new TypedProperty<aiVector3D>(aiVector3D(
			ParseTokenAsFloat(*tok[4]),
			ParseTokenAsFloat(*tok[5]),
			ParseTokenAsFloat(*tok[6]))
		);
	}
	else if (!strcmp(cs,"double") || !strcmp(cs,"Number") || !strcmp(cs,"Float") || !strcmp(cs,"FieldOfView")) {
		return new TypedProperty<float>(ParseTokenAsFloat(*tok[4]));
	}
	return NULL;
}


// ------------------------------------------------------------------------------------------------
// peek into an element and check if it contains a FBX property, if so return its name.
std::string PeekPropertyName(const Element& element)
{
	ai_assert(element.KeyToken().StringContents() == "P");
	const TokenList& tok = element.Tokens();
	if(tok.size() < 4) {
		return "";
	}

	return ParseTokenAsString(*tok[0]);
}

} //! anon


// ------------------------------------------------------------------------------------------------
PropertyTable::PropertyTable()
: templateProps()
, element()
{
}


// ------------------------------------------------------------------------------------------------
PropertyTable::PropertyTable(const Element& element, boost::shared_ptr<const PropertyTable> templateProps)
: templateProps(templateProps)
, element(&element)
{
	const Scope& scope = GetRequiredScope(element);
	BOOST_FOREACH(const ElementMap::value_type& v, scope.Elements()) {
		if(v.first != "P") {
			DOMWarning("expected only P elements in property table",v.second);
			continue;
		}

		const std::string& name = PeekPropertyName(*v.second);
		if(!name.length()) {
			DOMWarning("could not read property name",v.second);
			continue;
		}

		LazyPropertyMap::const_iterator it = lazyProps.find(name);
		if (it != lazyProps.end()) {
			DOMWarning("duplicate property name, will hide previous value: " + name,v.second);
			continue;
		}

		lazyProps[name] = v.second;
	}
}


// ------------------------------------------------------------------------------------------------
PropertyTable::~PropertyTable()
{
	BOOST_FOREACH(PropertyMap::value_type& v, props) {
		delete v.second;
	}
}


// ------------------------------------------------------------------------------------------------
const Property* PropertyTable::Get(const std::string& name) const
{
	PropertyMap::const_iterator it = props.find(name);
	if (it == props.end()) {
		// hasn't been parsed yet?
		LazyPropertyMap::const_iterator lit = lazyProps.find(name);
		if(lit != lazyProps.end()) {
			props[name] = ReadTypedProperty(*(*lit).second);
			it = props.find(name);

			ai_assert(it != props.end());
		}

		if (it == props.end()) {
			// check property template
			if(templateProps) {
				return templateProps->Get(name);
			}

			return NULL;
		}
	}
	
	return (*it).second;
}

DirectPropertyMap PropertyTable::GetUnparsedProperties() const
{
	DirectPropertyMap result;

	// Loop through all the lazy properties (which is all the properties)
	BOOST_FOREACH(const LazyPropertyMap::value_type& element, lazyProps) {

		// Skip parsed properties
		if (props.end() != props.find(element.first)) continue;

		// Read the element's value.
		// Wrap the naked pointer (since the call site is required to acquire ownership)
		// std::unique_ptr from C++11 would be preferred both as a wrapper and a return value.
		boost::shared_ptr<Property> prop = boost::shared_ptr<Property>(ReadTypedProperty(*element.second));
			
		// Element could not be read. Skip it.
		if (!prop) continue;

		// Add to result
		result[element.first] = prop;
	}

	return result;
}



} //! FBX
} //! Assimp

#endif