- Major update to the viewer. A little bit buggy now, but I'll fix that

- 2/3 of the viewer code are no wrapped in helper classes
- ByteSwap.h header added 
- Bugfix in the 3DS loader: Texture blend mode was read incorrectly
- Bugfix in the X-Loader. Assets with specular_exp == 0 use gouraud lighting now
- Added new helper functions to MaterialHelper 
- Added aiMaterialGetTexture() function to allow easy access to all properties of a texture

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@16 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/XFileImporter.cpp

@@ -561,8 +561,13 @@ void XFileImporter::ConvertMaterials( aiScene* pScene, const std::vector<XFile::
 		aiString name;
 		name.Set( oldMat.mName);
 		mat->AddProperty( &name, AI_MATKEY_NAME);
+
 		// Shading model: hardcoded to PHONG, there is no such information in an XFile
-		int shadeMode = (int) aiShadingMode_Phong;
+		// FIX (aramis): If the specular exponent is 0, use gouraud shading. This is a bugfix
+		// for some models in the SDK (e.g. good old tiny.x)
+		int shadeMode = (int)oldMat.mSpecularExponent == 0.0f 
+			? aiShadingMode_Gouraud : aiShadingMode_Phong;
+
 		mat->AddProperty<int>( &shadeMode, 1, AI_MATKEY_SHADING_MODEL);
 		// material colours
 		mat->AddProperty( &oldMat.mEmissive, 1, AI_MATKEY_COLOR_EMISSIVE);