Optimized triangulation algorithm. Must more faster now.

Added loader for TERRAGEN terrains (*.ter).
ScenePreprocessor generates a default material if none is given.
AC: file extension bug
Added terragen test files.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@279 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/Importer.cpp

@@ -129,7 +129,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_BUILD_NO_COLLADA_IMPORTER
 #	include "ColladaLoader.h"
 #endif
-
+#ifndef AI_BUILD_NO_TERRAGEN_IMPORTER
+#	include "TerragenLoader.h"
+#endif
 
 // PostProcess-Steps
 #ifndef AI_BUILD_NO_CALCTANGENTS_PROCESS
@@ -193,11 +195,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #	include "TextureTransform.h"
 #endif
 
-
 using namespace Assimp;
 
-
-
 // ------------------------------------------------------------------------------------------------
 // Constructor. 
 Importer::Importer() :
@@ -205,12 +204,12 @@ Importer::Importer() :
 	mScene(NULL),
 	mErrorString("")	
 {
-	// allocate a default IO handler
+	// Allocate a default IO handler
 	mIOHandler = new DefaultIOSystem;
 	mIsDefaultHandler = true; 
 	bExtraVerbose     = false; // disable extra verbose mode by default
 
-	// add an instance of each worker class here
+	// Add an instance of each worker class here
 	// the order doesn't really care, however file formats that are
 	// used more frequently than others should be at the beginning.
 	mImporter.reserve(25);
@@ -290,6 +289,9 @@ Importer::Importer() :
 #if (!defined AI_BUILD_NO_COLLADA_IMPORTER)
 	mImporter.push_back( new ColladaLoader());
 #endif
+#if (!defined AI_BUILD_NO_TERRAGEN_IMPORTER)
+	mImporter.push_back( new TerragenImporter());
+#endif
 
 	// Add an instance of each post processing step here in the order 
 	// of sequence it is executed. steps that are added here are not validated -