From 51c6f925d8e8c84e6f8dafdb44f19c790069ac62 Mon Sep 17 00:00:00 2001
From: wanqing0421 <xuwenxuan_ustb@126.com>
Date: Sun, 18 May 2025 21:50:37 +0800
Subject: [PATCH 1/2] add box region

---
 src/PostprocessData/CMakeLists.txt            |   1 +
 .../boxRegionPoints/boxRegionPoints.cpp       |  47 +++++
 .../boxRegionPoints/boxRegionPoints.hpp       | 171 ++++++++++++++++++
 3 files changed, 219 insertions(+)
 create mode 100644 src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.cpp
 create mode 100644 src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.hpp

diff --git a/src/PostprocessData/CMakeLists.txt b/src/PostprocessData/CMakeLists.txt
index a68a6d75..0e19ac04 100644
--- a/src/PostprocessData/CMakeLists.txt
+++ b/src/PostprocessData/CMakeLists.txt
@@ -9,6 +9,7 @@ set(SourceFiles
     # Regions
     region/regionPoints/regionPoints/regionPoints.cpp
     region/regionPoints/sphereRegionPoints/sphereRegionPoints.cpp
+    region/regionPoints/boxRegionPoints/boxRegionPoints.cpp
     region/regionPoints/lineRegionPoints/lineRegionPoints.cpp
     region/regionPoints/centerPointsRegionPoints/centerPointsRegionPoints.cpp
     region/regionPoints/multipleSpheresRegionPoints/multipleSpheresRegionPoints.cpp
diff --git a/src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.cpp b/src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.cpp
new file mode 100644
index 00000000..5b5bb151
--- /dev/null
+++ b/src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.cpp
@@ -0,0 +1,47 @@
+#include "boxRegionPoints.hpp"
+#include "fieldsDataBase.hpp"
+#include "numericConstants.hpp"
+
+namespace pFlow::postprocessData
+{
+
+boxRegionPoints::boxRegionPoints
+(
+    const dictionary &dict, 
+    fieldsDataBase &fieldsDataBase
+)
+:
+    regionPoints(dict, fieldsDataBase),
+    boxRegion_(dict.subDict("boxInfo")),
+    volume_((boxRegion_.maxPoint().x() - boxRegion_.minPoint().x()) * (boxRegion_.maxPoint().y() - boxRegion_.minPoint().y()) * (boxRegion_.maxPoint().z() - boxRegion_.minPoint().z())),
+    diameter_(pow(3 * volume_ / 4.0 / Pi, 1.0 / 3.0)),
+    selectedPoints_("selectedPoints")
+{
+}
+
+bool boxRegionPoints::update()
+{
+    const auto points = database().updatePoints();
+    selectedPoints_.clear();
+    for(uint32 i = 0; i < points.size(); ++i)
+    {
+        if( boxRegion_.isInside(points[i]))
+        {
+            selectedPoints_.push_back(i);
+        }
+    }
+ 
+    return true;
+}
+
+bool boxRegionPoints::write(iOstream &os) const
+{
+    os <<"# Single box\n";
+    os <<"# min point: "<< boxRegion_.minPoint() <<endl;
+    os <<"# max point: "<< boxRegion_.maxPoint() << endl;
+    os <<"time"<< tab <<"value"<<endl;
+    
+    return true;
+}
+
+} // End namespace pFlow::postprocessData
diff --git a/src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.hpp b/src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.hpp
new file mode 100644
index 00000000..561eed24
--- /dev/null
+++ b/src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.hpp
@@ -0,0 +1,171 @@
+/*------------------------------- phasicFlow ---------------------------------
+      O        C enter of
+     O O       E ngineering and
+    O   O      M ultiscale modeling of
+   OOOOOOO     F luid flow
+------------------------------------------------------------------------------
+  Copyright (C): www.cemf.ir
+  email: hamid.r.norouzi AT gmail.com
+------------------------------------------------------------------------------
+Licence:
+  This file is part of phasicFlow code. It is a free software for simulating
+  granular and multiphase flows. You can redistribute it and/or modify it under
+  the terms of GNU General Public License v3 or any other later versions.
+
+  phasicFlow is distributed to help others in their research in the field of
+  granular and multiphase flows, but WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+-----------------------------------------------------------------------------*/
+
+/**
+ * @file boxRegionPoints.hpp
+ * @brief A class representing a box region for point selection
+ * 
+ * This class provides functionality to select points within a box region
+ * and to compute related properties such as volume and equivalent diameter.
+ * It inherits from regionPoints and implements all required virtual methods.
+ * 
+ * @see regionPoints
+ * @see box
+ * @see fieldsDataBase
+ */
+
+#ifndef __boxRegionPoints_hpp__
+#define __boxRegionPoints_hpp__
+
+#include "regionPoints.hpp"
+#include "box.hpp"
+#include "Vectors.hpp"
+
+namespace pFlow::postprocessData
+{
+
+class boxRegionPoints
+:
+    public regionPoints
+{
+private:
+
+    /// box object defining the region for point selection
+    box  boxRegion_;
+
+    /// Volume of the box region
+    real    volume_;
+
+    /// Diameter of the box region
+    real    diameter_;
+
+    /// Indices of points that are selected by this region
+    uint32Vector    selectedPoints_;
+
+public:
+
+    TypeInfo(box::TYPENAME());
+
+    /**
+     * @brief Construct a box region for point selection
+     * 
+     * @param dict Dictionary containing boxInfo dictionary 
+     * @param fieldsDataBase Database containing fields data
+     */
+    boxRegionPoints(
+        const dictionary& dict,
+        fieldsDataBase& fieldsDataBase);
+
+    /// Destructor
+    ~boxRegionPoints() override = default;
+    
+    /**
+     * @brief Get the number of regions (always 1 for box)
+     * @return Always returns 1
+     */
+    uint32 size()const override
+    {
+        return 1;
+    }
+
+    /**
+     * @brief Check if the region is empty
+     * @return Always returns false
+     */
+    bool empty()const override
+    {
+        return false;
+    }
+
+    /**
+     * @brief Get the volume of the box region
+     * @return A span containing the volume of the region
+     */
+    span<const real> volumes()const override
+    {
+        return span<const real>(&volume_, 1);
+    }
+
+    /**
+     * @brief Get the equivalent diameter of the box region
+     * @return A span containing the diameter of the region
+     */
+    span<const real> eqDiameters()const override
+    {
+        return span<const real>(&diameter_, 1);
+    }
+
+    /**
+     * @brief Get the center of the box region
+     * @return A span containing the center point of the region
+     */
+    span<const realx3> centers()const override
+    {
+        realx3 center = 0.5 * (boxRegion_.minPoint() + boxRegion_.maxPoint());
+        return span<const realx3>(&center, 1);
+    }
+    
+    /**
+     * @brief Get the indices of points within the region (const version)
+     * @param elem Element index (ignored as there's only one box)
+     * @return A span containing indices of points within the region
+     */    
+    span<const uint32> indices(uint32 elem)const override
+    {
+        return span<const uint32>(selectedPoints_.data(), selectedPoints_.size());
+    }
+
+    /**
+     * @brief Get the indices of points within the region (non-const version)
+     * @param elem Element index (ignored as there's only one box)
+     * @return A span containing indices of points within the region
+     */
+    span<uint32> indices(uint32 elem) override
+    {
+        return span<uint32>(selectedPoints_.data(), selectedPoints_.size());
+    }
+
+    /**
+     * @brief Update the points selected by this region
+     * @return True if update was successful
+     */
+    bool update()override;
+
+    /**
+     * @brief Determine if data should be written to the same time file
+     * @return Always returns true
+     */
+    bool writeToSameTimeFile()const override
+    {
+        return true;
+    }
+
+    /**
+     * @brief Write region data to output stream
+     * @param os Output stream to write to
+     * @return True if write was successful
+     */
+    bool write(iOstream& os)const override;
+    
+};
+
+}
+
+#endif // __boxRegionPoints_hpp__
\ No newline at end of file

From 0e4a041ffb0bfc3d4f183c3b67d21aee0dd2dc2e Mon Sep 17 00:00:00 2001
From: PhasicFlow <113092888+PhasicFlow@users.noreply.github.com>
Date: Mon, 19 May 2025 11:21:26 +0330
Subject: [PATCH 2/2] Update volume boxRegionPoints.cpp

---
 .../regionPoints/boxRegionPoints/boxRegionPoints.cpp       | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.cpp b/src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.cpp
index 5b5bb151..577f9705 100644
--- a/src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.cpp
+++ b/src/PostprocessData/region/regionPoints/boxRegionPoints/boxRegionPoints.cpp
@@ -13,7 +13,12 @@ boxRegionPoints::boxRegionPoints
 :
     regionPoints(dict, fieldsDataBase),
     boxRegion_(dict.subDict("boxInfo")),
-    volume_((boxRegion_.maxPoint().x() - boxRegion_.minPoint().x()) * (boxRegion_.maxPoint().y() - boxRegion_.minPoint().y()) * (boxRegion_.maxPoint().z() - boxRegion_.minPoint().z())),
+    volume_
+    (
+        (boxRegion_.maxPoint().x() - boxRegion_.minPoint().x()) * 
+        (boxRegion_.maxPoint().y() - boxRegion_.minPoint().y()) * 
+        (boxRegion_.maxPoint().z() - boxRegion_.minPoint().z())
+    ),
     diameter_(pow(3 * volume_ / 4.0 / Pi, 1.0 / 3.0)),
     selectedPoints_("selectedPoints")
 {