Initiual commit: AssetImporter source moved from ZFXCE repository to its own repository. PLease do not use the ZFXCE repo any more.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
2008-05-05 12:36:31 +00:00
commit b76f999cb7
131 changed files with 24989 additions and 0 deletions
--- a/code/TriangulateProcess.cpp
+++ b/code/TriangulateProcess.cpp
@@ -0,0 +1,83 @@
+/** @file Implementation of the post processing step to split up
+ * all faces with more than three indices into triangles.
+ */
+#include <vector>
+#include <assert.h>
+#include "TriangulateProcess.h"
+#include "../include/aiPostProcess.h"
+#include "../include/aiMesh.h"
+#include "../include/aiScene.h"
+
+using namespace Assimp;
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+TriangulateProcess::TriangulateProcess()
+{
+	// nothing to do here
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+TriangulateProcess::~TriangulateProcess()
+{
+	// nothing to do here
+}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the processing step is present in the given flag field.
+bool TriangulateProcess::IsActive( unsigned int pFlags) const
+{
+	return (pFlags & aiProcess_Triangulate) != 0;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Executes the post processing step on the given imported data.
+void TriangulateProcess::Execute( aiScene* pScene)
+{
+	for( unsigned int a = 0; a < pScene->mNumMeshes; a++)
+		TriangulateMesh( pScene->mMeshes[a]);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Triangulates the given mesh.
+void TriangulateProcess::TriangulateMesh( aiMesh* pMesh)
+{
+	std::vector<aiFace> newFaces;
+	newFaces.reserve( pMesh->mNumFaces*2);
+	for( unsigned int a = 0; a < pMesh->mNumFaces; a++)
+	{
+		const aiFace& face = pMesh->mFaces[a];
+
+		// if it's a simple primitive, just copy it
+		if( face.mNumIndices == 3)
+		{
+			newFaces.push_back( aiFace());
+			aiFace& nface = newFaces.back();
+			nface.mNumIndices = face.mNumIndices;
+			nface.mIndices = new unsigned int[nface.mNumIndices];
+			memcpy( nface.mIndices, face.mIndices, nface.mNumIndices * sizeof( unsigned int));
+		} else
+		{
+			assert( face.mNumIndices > 3);
+			for( unsigned int b = 0; b < face.mNumIndices - 2; b++)
+			{
+				newFaces.push_back( aiFace());
+				aiFace& nface = newFaces.back();
+				nface.mNumIndices = 3;
+				nface.mIndices = new unsigned int[3];
+				nface.mIndices[0] = face.mIndices[0];
+				nface.mIndices[1] = face.mIndices[b+1];
+				nface.mIndices[2] = face.mIndices[b+2];
+			}
+		}
+	}
+
+	// kill the old faces
+	delete [] pMesh->mFaces;
+	// and insert our newly generated faces
+	pMesh->mNumFaces = newFaces.size();
+	pMesh->mFaces = new aiFace[pMesh->mNumFaces];
+	for( unsigned int a = 0; a < newFaces.size(); a++)
+		pMesh->mFaces[a] = newFaces[a];
+}