Merge branch 'dev'HEADmaster

1 files changed, 72 insertions, 0 deletions

diff --git a/modules/core/c++/descriptor/d3q19.hpp b/modules/core/c++/descriptor/d3q19.hpp
new file mode 100644
index 0000000..bbd1bd1
--- /dev/null
+++ b/modules/core/c++/descriptor/d3q19.hpp
@@ -0,0 +1,72 @@
+#pragma once
+
+namespace kel {
+namespace lbm {
+namespace sch {
+using D3Q19 = Descriptor<3u,19u>;
+}
+
+template<typename T>
+class df_info<T, sch::Descriptor<3,19>> {
+public:
+    using Descriptor = sch::Descriptor<3,19>;
+
+    static constexpr uint64_t D = 3u;
+    static constexpr uint64_t Q = 19u;
+
+    static constexpr std::array<std::array<int32_t,D>,Q> directions = {{
+        { 0,  0,  0}, // 0
+
+        {-1,  0,  0}, // 1
+        { 1,  0,  0}, // 2
+        { 0, -1,  0}, // 3
+        { 0,  1,  0}, // 4
+        { 0,  0, -1}, // 5
+        { 0,  0,  1}, // 6
+
+        {-1, -1,  0}, // 7
+        { 1, -1,  0}, // 8
+        {-1,  1,  0}, // 9
+        { 1,  1,  0}, //10
+
+        {-1,  0, -1}, //11
+        { 1,  0, -1}, //12
+        {-1,  0,  1}, //13
+        { 1,  0,  1}, //14
+
+        { 0, -1, -1}, //15
+        { 0,  1, -1}, //16
+        { 0, -1,  1}, //17
+        { 0,  1,  1}  //18
+    }};
+
+    static constexpr std::array<typename saw::native_data_type<T>::type,Q> weights = {
+        1./3.,
+
+        1./18., 1./18.,
+        1./18., 1./18.,
+        1./18., 1./18.,
+
+        1./36., 1./36.,
+        1./36., 1./36.,
+        1./36., 1./36.,
+        1./36., 1./36.,
+        1./36., 1./36.,
+        1./36., 1./36.
+    };
+
+    static constexpr std::array<uint64_t,Q> opposite_index = {
+        0,
+        2,1,
+        4,3,
+        6,5,
+        10,9,8,7,
+        14,13,12,11,
+        18,17,16,15
+    };
+
+    static constexpr typename saw::native_data_type<T>::type inv_cs2 = 3.0;
+    static constexpr typename saw::native_data_type<T>::type cs2 = 1./3.;
+};
+}
+}