General

- Added format auto-detection to most loaders
  - Simplified BaseImporter::CanRead() with some utility methods
  - improved fast_atof -> no overruns anymore. Fuck you, irrlicht.
  - added assimp_cmd tool to allow command line model processing. Mainly adebugging tool for internal purposes, but others might find it useful, too.
  - vc8/vc9: revision number is now written to DLL version header
  - mkutil: some batch scripts to simplify tagging & building of release versions
  - some API cleanup
  - fixing some doxygen markup (+now explicit use of @file <filename>)
  - Icon for assimp_view and assimp_cmd

3DS
  - Normal vectors are not anymore inverted in some cases
  - Improved pivot handling
  - Improved handling of x-flipped meshes

Collada
  - fixed a minor bug (visual_scene element)

LWS 
  - WIP implementation. No animations yet, some bugs and crashes.
  - Animation system remains disabled, WIP code
  - many test files for LWS, but most of them test the anim support, which is, read above, currently disabled.

STL
  - fixing a log warning which appears for every model
  - added binary&ascii test spider, exported from truespace

MD3 
  - Cleaning up output tags for automatically joined player models.


IRR
  - Fixing coordinate system issues. 
  - Instance handling improved.
  - Some of the reported crashes not yet fixed.

PretransformVertices
  - Numerous performance improvements.
  - Added config option to preserve the hierarchy during the step.

RemoveRedundantMaterials
  - Added config option to specify a list of materials which are kept in every case.

UNREAL
  - Added support for the old unreal data format (*.a,*.d,*.uc)
  - tested only with exports from Milkshape
  - more Unreal stuff to come soon



git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@356 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/ACLoader.cpp

@@ -108,28 +108,38 @@ using namespace Assimp;
 // Constructor to be privately used by Importer
 AC3DImporter::AC3DImporter()
 {
+	// nothing to be done here
 }
 
 // ------------------------------------------------------------------------------------------------
 // Destructor, private as well 
 AC3DImporter::~AC3DImporter()
 {
+	// nothing to be done here
 }
 
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file. 
-bool AC3DImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler) const
+bool AC3DImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const
 {
-	// simple check of file extension is enough for the moment
-	std::string::size_type pos = pFile.find_last_of('.');
-	// no file extension - can't read
-	if( pos == std::string::npos)return false;
-	std::string extension = pFile.substr( pos);
+	std::string extension = GetExtension(pFile);
 
-	for( std::string::iterator it = extension.begin(); it != extension.end(); ++it)
-		*it = tolower( *it);
+	// fixme: are acc and ac3d *really* used? Some sources say they are
+	if(extension == "ac" || extension == "ac3d" || extension == "acc") {
+		return true;
+	}
+	if (!extension.length() || checkSig) {
+		uint32_t token = AI_MAKE_MAGIC("AC3D");
+		return CheckMagicToken(pIOHandler,pFile,&token,1,0);
+	}
+	return false;
+}
 
-	return( extension == ".ac3d" || extension == ".ac");
+// ------------------------------------------------------------------------------------------------
+// Get list of file extensions handled by this loader
+void AC3DImporter::GetExtensionList(std::string& append)
+{
+	append.append("*.ac;*.acc;*.ac3d");
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -140,7 +150,6 @@ bool AC3DImporter::GetNextLine( )
 	return SkipSpaces(&buffer);
 }
 
-
 // ------------------------------------------------------------------------------------------------
 // Parse an object section in an AC file
 void AC3DImporter::LoadObjectSection(std::vector<Object>& objects)