UPBGE: Don't tag empty display array for bounding box update.

If empty array are detected in a mesh they are not added in the
tracked list of the boundign box, if this list is empty a dummy
bounding box is created instead of a mesh bouning box.

source/gameengine/Expressions/EXP_PyObjectPlus.h

@@ -524,7 +524,7 @@ typedef struct EXP_PYATTRIBUTE_DEF {
 template <class ... Args>
 inline bool EXP_ParseTupleArgsAndKeywords(PyObject *pyargs, PyObject *pykwds, const char *format, std::initializer_list<const char *> keyword, Args ... args)
 {
-	BLI_assert((keyword.size() - 1) == (sizeof...Args));
+	BLI_assert((keyword.size() - 1) == (sizeof...(Args)));
 	static _PyArg_Parser _parser = {format, keyword.begin(), 0};
 	return _PyArg_ParseTupleAndKeywordsFast(pyargs, pykwds, &_parser, args ...);
 }

source/gameengine/Rasterizer/RAS_MeshObject.cpp

@@ -213,21 +213,31 @@ void RAS_MeshObject::EndConversion(RAS_BoundingBoxManager *boundingBoxManager)
 	for (RAS_MeshMaterial *meshmat : m_materials) {
 		RAS_IDisplayArray *array = meshmat->GetDisplayArray();
 		array->UpdateCache();
-		arrayList.push_back(array);
 
 		const std::string materialname = meshmat->GetBucket()->GetPolyMaterial()->GetName();
 		if (array->GetVertexCount() == 0) {
 			CM_Warning("mesh \"" << m_name << "\" has no vertices for material \"" << materialname
 				<< "\". It introduces performance decrease for empty render.");
 		}
-		else if (array->GetPrimitiveIndexCount() == 0) {
-			CM_Warning("mesh \"" << m_name << "\" has no polygons for material \"" << materialname
+		else {
+			// Generate bounding box only for non-empty display arrays.
+			arrayList.push_back(array);
+		}
+
+		if (array->GetPrimitiveIndexCount() == 0) {
+			CM_Warning("mesh \"" << m_name << "\" has no primitives for material \"" << materialname
 				<< "\". It introduces performance decrease for empty render.");
 		}
 	}
 
-	// Construct the bounding box of this mesh without deformers.
-	m_boundingBox = boundingBoxManager->CreateMeshBoundingBox(arrayList);
+	if (arrayList.empty()) {
+		// Use a dummy bounding box if there's no valid display arrays.
+		m_boundingBox = boundingBoxManager->CreateBoundingBox();
+	}
+	else {
+		// Construct the bounding box of this mesh without deformers.
+		m_boundingBox = boundingBoxManager->CreateMeshBoundingBox(arrayList);
+	}
 	m_boundingBox->Update(true);
 
 	// Construct polygon range info.