Introduce export with test for point clouds.

code/PretransformVertices.cpp

@@ -60,14 +60,17 @@ using namespace Assimp;
 // ------------------------------------------------------------------------------------------------
 // Constructor to be privately used by Importer
 PretransformVertices::PretransformVertices()
-:   configKeepHierarchy (false), configNormalize(false), configTransform(false), configTransformation()
-{
+: configKeepHierarchy (false)
+, configNormalize(false)
+, configTransform(false)
+, configTransformation()
+, mConfigPointCloud( false ) {
+    // empty
 }
 
 // ------------------------------------------------------------------------------------------------
 // Destructor, private as well
-PretransformVertices::~PretransformVertices()
-{
+PretransformVertices::~PretransformVertices() {
     // nothing to do here
 }
 
@@ -89,6 +92,8 @@ void PretransformVertices::SetupProperties(const Importer* pImp)
     configTransform = (0 != pImp->GetPropertyInteger(AI_CONFIG_PP_PTV_ADD_ROOT_TRANSFORMATION,0));
 
     configTransformation = pImp->GetPropertyMatrix(AI_CONFIG_PP_PTV_ROOT_TRANSFORMATION, aiMatrix4x4());
+
+    mConfigPointCloud = pImp->GetPropertyBool(AI_CONFIG_EXPORT_POINT_CLOUDS);
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -502,9 +507,7 @@ void PretransformVertices::Execute( aiScene* pScene)
             pScene->mMeshes[i]->mBones    = NULL;
             pScene->mMeshes[i]->mNumBones = 0;
         }
-    }
-    else {
-
+    } else {
         apcOutMeshes.reserve(pScene->mNumMaterials<<1u);
         std::list<unsigned int> aiVFormats;
 
@@ -556,7 +559,8 @@ void PretransformVertices::Execute( aiScene* pScene)
         }
 
         // If no meshes are referenced in the node graph it is possible that we get no output meshes.
-        if (apcOutMeshes.empty())   {
+        if (apcOutMeshes.empty()) {
+            
             throw DeadlyImportError("No output meshes: all meshes are orphaned and are not referenced by any nodes");
         }
         else