Adding aiCreateQuaternionFromMatrix() and aiDecomposeMatrix() to expose some cpp maths functionality for c.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@409 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/Assimp.cpp

@@ -366,3 +366,16 @@ ASSIMP_API void aiSetImportPropertyString(const char* szName,
 	SetGenericProperty<std::string>(gStringProperties,szName,
 		std::string( st->data ),NULL);
 }
+
+// ------------------------------------------------------------------------------------------------
+void aiCreateQuaternionFromMatrix(aiQuaternion* quat,const aiMatrix3x3* mat)
+{
+	*quat = aiQuaternion(*mat);
+}
+
+// ------------------------------------------------------------------------------------------------
+void aiDecomposeMatrix(const aiMatrix4x4* mat, aiVector3D* scaling,
+	aiQuaternion* rotation,aiVector3D* position)
+{
+	mat->Decompose(*scaling,*rotation,*position);
+}

include/assimp.h

@@ -147,8 +147,8 @@ ASSIMP_API void aiGetExtensionList(C_STRUCT aiString* szOut);
 
 // ---------------------------------------------------------------------------
 /** Get the storage required by an imported asset
- * \param pIn Input asset.
- * \param in Data structure to be filled. 
+ * @param pIn Input asset.
+ * @param in Data structure to be filled. 
  */
 // ---------------------------------------------------------------------------
 ASSIMP_API void aiGetMemoryRequirements(const C_STRUCT aiScene* pIn,
@@ -160,24 +160,37 @@ ASSIMP_API void aiGetMemoryRequirements(const C_STRUCT aiScene* pIn,
  *  #Assimp::Importer::SetPropertyInteger(). In the C-API properties are shared by
  *  all imports. It is not possible to specify them per asset.
  *
- * \param szName Name of the configuration property to be set. All constants
+ * @param szName Name of the configuration property to be set. All constants
  *   are defined in the aiConfig.h header file.
- * \param value New value for the property
+ * @param value New value for the property
  */
 // ---------------------------------------------------------------------------
 ASSIMP_API void aiSetImportPropertyInteger(const char* szName, int value);
 
 // ---------------------------------------------------------------------------
-/**  @see aiSetImportPropertyInteger()
+/** @see aiSetImportPropertyInteger()
  */
 ASSIMP_API void aiSetImportPropertyFloat(const char* szName, float value);
 
 // ---------------------------------------------------------------------------
-/**  @see aiSetImportPropertyInteger()
+/** @see aiSetImportPropertyInteger()
  */
 ASSIMP_API void aiSetImportPropertyString(const char* szName,
 	const C_STRUCT aiString* st);
 
+// ---------------------------------------------------------------------------
+/** @see aiQuaternion(const aiMatrix3x3& pRotMatrix)
+ */
+void aiCreateQuaternionFromMatrix(C_STRUCT aiQuaternion* quat,const C_STRUCT aiMatrix3x3* mat);
+
+// ---------------------------------------------------------------------------
+/** @see aiMatrix4x4::Decompose (aiVector3D&, aiQuaternion&, aiVector3D&) const;
+ */
+void aiDecomposeMatrix(const C_STRUCT aiMatrix4x4* mat,
+	C_STRUCT aiVector3D* scaling, 
+	C_STRUCT aiQuaternion* rotation,
+	C_STRUCT aiVector3D* position);
+
 
 #ifdef __cplusplus
 }