- FBX importer: basic interface and importer skeleton. Start tokenizer and parser.

code/FBXImporter.cpp

@@ -0,0 +1,158 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2012, assimp team
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms, 
+with or without modification, are permitted provided that the 
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXImporter.cpp
+ *  @brief Implementation of the FBX importer.
+ */
+#include "AssimpPCH.h"
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include <iterator>
+#include <boost/tuple/tuple.hpp>
+
+
+#include "FBXImporter.h"
+
+#include "FBXTokenizer.h"
+#include "FBXParser.h"
+
+#include "StreamReader.h"
+#include "MemoryIOWrapper.h"
+
+namespace Assimp {
+	template<> const std::string LogFunctions<FBXImporter>::log_prefix = "FBX: ";
+}
+
+using namespace Assimp;
+using namespace Assimp::Formatter;
+using namespace Assimp::FBX;
+
+namespace {
+static const aiImporterDesc desc = {
+	"Autodesk FBX Importer",
+	"",
+	"",
+	"",
+	aiImporterFlags_SupportTextFlavour,
+	0,
+	0,
+	0,
+	0,
+	"fbx" 
+};
+}
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by #Importer
+FBXImporter::FBXImporter()
+{}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well 
+FBXImporter::~FBXImporter()
+{
+}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the class can handle the format of the given file. 
+bool FBXImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const
+{
+	const std::string& extension = GetExtension(pFile);
+	if (extension == "fbx") {
+		return true;
+	}
+
+	else if ((!extension.length() || checkSig) && pIOHandler)	{
+		// at least ascii FBX files usually have a 'FBX' somewhere in their head
+		const char* tokens[] = {"FBX"};
+		return SearchFileHeaderForToken(pIOHandler,pFile,tokens,1);
+	}
+	return false;
+}
+
+// ------------------------------------------------------------------------------------------------
+// List all extensions handled by this loader
+const aiImporterDesc* FBXImporter::GetInfo () const
+{
+	return &desc;
+}
+
+
+// ------------------------------------------------------------------------------------------------
+// Setup configuration properties for the loader
+void FBXImporter::SetupProperties(const Importer* pImp)
+{
+	// no tweakables yet
+}
+
+
+// ------------------------------------------------------------------------------------------------
+// Imports the given file into the given scene structure. 
+void FBXImporter::InternReadFile( const std::string& pFile, 
+	aiScene* pScene, IOSystem* pIOHandler)
+{
+	boost::scoped_ptr<IOStream> stream(pIOHandler->Open(pFile,"rb"));
+	if (!stream) {
+		ThrowException("Could not open file for reading");
+	}
+
+	// read entire file into memory - no streaming for this, fbx
+	// files can grow large, but the assimp output data structure
+	// then becomes very large, too. Assimp doesn't support
+	// streaming for its output data structures so the net win with
+	// streaming input data would be very low.
+	std::vector<char> contents;
+	contents.resize(stream->FileSize());
+
+	stream->Read(&*contents.begin(),contents.size(),1);
+	const char* const begin = &*contents.begin();
+
+	// broadphase tokenizing pass in which we identify the core
+	// syntax elements of FBX (brackets, commas, key:value mappings)
+	TokenList tokens;
+	Tokenize(tokens,begin);
+
+	// use this information to construct a very rudimentary 
+	// parse-tree representing the FBX scope structure
+	Parser parser(tokens);
+}
+
+#endif // !ASSIMP_BUILD_NO_FBX_IMPORTER