From 4ec94c97879aafef15f7663135745e4ba61e62cf Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Mon, 17 May 2021 00:15:33 +0200
Subject: Extract first public LiterateLB version

---
 tangle/LLBM/materials.h | 108 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 tangle/LLBM/materials.h

(limited to 'tangle/LLBM/materials.h')

diff --git a/tangle/LLBM/materials.h b/tangle/LLBM/materials.h
new file mode 100644
index 0000000..d782d8d
--- /dev/null
+++ b/tangle/LLBM/materials.h
@@ -0,0 +1,108 @@
+#pragma once
+
+#include "memory.h"
+#include "sdf.h"
+
+template <typename DESCRIPTOR>
+class CellMaterials : public SharedVector<int> {
+private:
+  const descriptor::Cuboid<DESCRIPTOR> _cuboid;
+  int* const _materials;
+
+public:
+  CellMaterials(descriptor::Cuboid<DESCRIPTOR> cuboid):
+    SharedVector<int>(cuboid.volume),
+    _cuboid(cuboid),
+    _materials(this->host()) { }
+
+  template <typename F>
+  CellMaterials(descriptor::Cuboid<DESCRIPTOR> cuboid, F f):
+    CellMaterials(cuboid) {
+    set(f);
+  }
+
+  descriptor::Cuboid<DESCRIPTOR> cuboid() const {
+    return _cuboid;
+  };
+ 
+  int get(std::size_t iCell) const {
+    return _materials[iCell];
+  }
+  
+  void set(std::size_t iCell, int material) {
+    _materials[iCell] = material;
+  }
+  template <typename F>
+  void set(F f) {
+    for (std::size_t iCell=0; iCell < _cuboid.volume; ++iCell) {
+      set(iCell, f(gidInverse(_cuboid, iCell)));
+    }
+  }
+  
+  template <typename S>
+  void sdf(S distance, int material, float eps=1e-2) {
+    for (std::size_t iCell=0; iCell < _cuboid.volume; ++iCell) {
+      auto p = gidInverseSmooth(_cuboid, iCell);
+      if (distance(p) < eps) {
+        set(iCell, material);
+      }
+    }
+  }
+  
+  void clean(int material) {
+    for (std::size_t iCell=0; iCell < _cuboid.volume; ++iCell) {
+      if (get(iCell) == material) {
+        if (_cuboid.isInside(iCell)) {
+          bool surrounded = true;
+          for (unsigned iPop=0; iPop < DESCRIPTOR::q; ++iPop) {
+            int m = get(descriptor::neighbor<DESCRIPTOR>(_cuboid, iCell, iPop));
+            surrounded &= m == material || m == 0;
+          }
+          if (surrounded) {
+            set(iCell, 0);
+          }
+        }
+      }
+    }
+  }
+  DeviceBuffer<std::size_t> list_of_material(int material) {
+  	std::vector<std::size_t> cells;
+  	for (std::size_t iCell=0; iCell < _cuboid.volume; ++iCell) {
+  		if (_materials[iCell] == material) {
+  			cells.emplace_back(iCell);
+  		}
+  	}
+  	return DeviceBuffer<std::size_t>(cells);
+  }
+  DeviceBuffer<bool> mask_of_material(int material) {
+    std::unique_ptr<bool[]> mask(new bool[_cuboid.volume]{});
+  	for (std::size_t iCell=0; iCell < _cuboid.volume; ++iCell) {
+      mask[iCell] = (_materials[iCell] == material);
+  	}
+  	return DeviceBuffer<bool>(mask.get(), _cuboid.volume);
+  }
+  std::size_t get_link_count(int bulk, int solid) {
+    std::size_t count = 0;
+    for (pop_index_t iPop=0; iPop < DESCRIPTOR::q; ++iPop) {
+      for (std::size_t iCell=0; iCell < _cuboid.volume; ++iCell) {
+        std::size_t jCell = descriptor::neighbor<DESCRIPTOR>(_cuboid, iCell, iPop);
+        if (get(iCell) == bulk && get(jCell) == solid) {
+          count++;
+        }
+      }
+    }
+    return count;
+  }
+  
+  template <typename F>
+  void for_links(int bulk, int solid, F f) {
+    for (pop_index_t iPop=0; iPop < DESCRIPTOR::q; ++iPop) {
+      for (std::size_t iCell=0; iCell < _cuboid.volume; ++iCell) {
+        std::size_t jCell = descriptor::neighbor<DESCRIPTOR>(_cuboid, iCell, iPop);
+        if (get(iCell) == bulk && get(jCell) == solid) {
+          f(iCell, iPop);
+        }
+      }
+    }
+  }
+};
-- 
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