ESPResSo
Extensible Simulation Package for Research on Soft Matter Systems
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InitialPDFsSetterSinglePrecision.cpp
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1//======================================================================================================================
2//
3// This file is part of waLBerla. waLBerla is free software: you can
4// redistribute it and/or modify it under the terms of the GNU General Public
5// License as published by the Free Software Foundation, either version 3 of
6// the License, or (at your option) any later version.
7//
8// waLBerla is distributed in the hope that it will be useful, but WITHOUT
9// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11// for more details.
12//
13// You should have received a copy of the GNU General Public License along
14// with waLBerla (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
15//
16//! \\file InitialPDFsSetterSinglePrecision.cpp
17//! \\author pystencils
18//======================================================================================================================
19
20// kernel generated with pystencils v1.3.3, lbmpy v1.3.3, lbmpy_walberla/pystencils_walberla from waLBerla commit b0842e1a493ce19ef1bbb8d2cf382fc343970a7f
21
22#include <cmath>
23
24#include "InitialPDFsSetterSinglePrecision.h"
25#include "core/DataTypes.h"
26#include "core/Macros.h"
27
28#define FUNC_PREFIX
29
30#if (defined WALBERLA_CXX_COMPILER_IS_GNU) || (defined WALBERLA_CXX_COMPILER_IS_CLANG)
31#pragma GCC diagnostic push
32#pragma GCC diagnostic ignored "-Wfloat-equal"
33#pragma GCC diagnostic ignored "-Wshadow"
34#pragma GCC diagnostic ignored "-Wconversion"
35#pragma GCC diagnostic ignored "-Wunused-variable"
36#endif
37
38#if (defined WALBERLA_CXX_COMPILER_IS_INTEL)
39#pragma warning push
40#pragma warning(disable : 1599)
41#endif
42
43using namespace std;
44
45namespace walberla {
46namespace pystencils {
47
48namespace internal_b8085d63d6b7e842485134abbac511e8 {
49static FUNC_PREFIX void initialpdfssettersingleprecision_initialpdfssettersingleprecision(float *RESTRICT const _data_force, float *RESTRICT _data_pdfs, float *RESTRICT const _data_velocity, int64_t const _size_force_0, int64_t const _size_force_1, int64_t const _size_force_2, int64_t const _stride_force_0, int64_t const _stride_force_1, int64_t const _stride_force_2, int64_t const _stride_force_3, int64_t const _stride_pdfs_0, int64_t const _stride_pdfs_1, int64_t const _stride_pdfs_2, int64_t const _stride_pdfs_3, int64_t const _stride_velocity_0, int64_t const _stride_velocity_1, int64_t const _stride_velocity_2, int64_t const _stride_velocity_3, float rho_0) {
50 const float rho = rho_0;
51 for (int64_t ctr_2 = 0; ctr_2 < _size_force_2; ctr_2 += 1) {
52 for (int64_t ctr_1 = 0; ctr_1 < _size_force_1; ctr_1 += 1) {
53 for (int64_t ctr_0 = 0; ctr_0 < _size_force_0; ctr_0 += 1) {
54 const float u_0 = -0.5f * ((1.0f) / (rho)) * _data_force[_stride_force_0 * ctr_0 + _stride_force_1 * ctr_1 + _stride_force_2 * ctr_2] + _data_velocity[_stride_velocity_0 * ctr_0 + _stride_velocity_1 * ctr_1 + _stride_velocity_2 * ctr_2];
55 const float u_1 = -0.5f * ((1.0f) / (rho)) * _data_force[_stride_force_0 * ctr_0 + _stride_force_1 * ctr_1 + _stride_force_2 * ctr_2 + _stride_force_3] + _data_velocity[_stride_velocity_0 * ctr_0 + _stride_velocity_1 * ctr_1 + _stride_velocity_2 * ctr_2 + _stride_velocity_3];
56 const float u_2 = -0.5f * ((1.0f) / (rho)) * _data_force[_stride_force_0 * ctr_0 + _stride_force_1 * ctr_1 + _stride_force_2 * ctr_2 + 2 * _stride_force_3] + _data_velocity[_stride_velocity_0 * ctr_0 + _stride_velocity_1 * ctr_1 + _stride_velocity_2 * ctr_2 + 2 * _stride_velocity_3];
57 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2] = rho * -0.33333333333333331f * (u_0 * u_0) + rho * -0.33333333333333331f * (u_1 * u_1) + rho * -0.33333333333333331f * (u_2 * u_2) + rho * 0.33333333333333331f;
58 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + _stride_pdfs_3] = rho * u_1 * 0.16666666666666666f + rho * -0.16666666666666666f * (u_0 * u_0) + rho * -0.16666666666666666f * (u_2 * u_2) + rho * 0.055555555555555552f + rho * 0.16666666666666666f * (u_1 * u_1);
59 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 2 * _stride_pdfs_3] = rho * u_1 * -0.16666666666666666f + rho * -0.16666666666666666f * (u_0 * u_0) + rho * -0.16666666666666666f * (u_2 * u_2) + rho * 0.055555555555555552f + rho * 0.16666666666666666f * (u_1 * u_1);
60 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 3 * _stride_pdfs_3] = rho * u_0 * -0.16666666666666666f + rho * -0.16666666666666666f * (u_1 * u_1) + rho * -0.16666666666666666f * (u_2 * u_2) + rho * 0.055555555555555552f + rho * 0.16666666666666666f * (u_0 * u_0);
61 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 4 * _stride_pdfs_3] = rho * u_0 * 0.16666666666666666f + rho * -0.16666666666666666f * (u_1 * u_1) + rho * -0.16666666666666666f * (u_2 * u_2) + rho * 0.055555555555555552f + rho * 0.16666666666666666f * (u_0 * u_0);
62 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 5 * _stride_pdfs_3] = rho * u_2 * 0.16666666666666666f + rho * -0.16666666666666666f * (u_0 * u_0) + rho * -0.16666666666666666f * (u_1 * u_1) + rho * 0.055555555555555552f + rho * 0.16666666666666666f * (u_2 * u_2);
63 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 6 * _stride_pdfs_3] = rho * u_2 * -0.16666666666666666f + rho * -0.16666666666666666f * (u_0 * u_0) + rho * -0.16666666666666666f * (u_1 * u_1) + rho * 0.055555555555555552f + rho * 0.16666666666666666f * (u_2 * u_2);
64 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 7 * _stride_pdfs_3] = rho * u_0 * u_1 * -0.25f + rho * u_0 * -0.083333333333333329f + rho * u_1 * 0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_0 * u_0) + rho * 0.083333333333333329f * (u_1 * u_1);
65 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 8 * _stride_pdfs_3] = rho * u_0 * u_1 * 0.25f + rho * u_0 * 0.083333333333333329f + rho * u_1 * 0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_0 * u_0) + rho * 0.083333333333333329f * (u_1 * u_1);
66 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 9 * _stride_pdfs_3] = rho * u_0 * u_1 * 0.25f + rho * u_0 * -0.083333333333333329f + rho * u_1 * -0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_0 * u_0) + rho * 0.083333333333333329f * (u_1 * u_1);
67 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 10 * _stride_pdfs_3] = rho * u_0 * u_1 * -0.25f + rho * u_0 * 0.083333333333333329f + rho * u_1 * -0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_0 * u_0) + rho * 0.083333333333333329f * (u_1 * u_1);
68 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 11 * _stride_pdfs_3] = rho * u_1 * u_2 * 0.25f + rho * u_1 * 0.083333333333333329f + rho * u_2 * 0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_1 * u_1) + rho * 0.083333333333333329f * (u_2 * u_2);
69 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 12 * _stride_pdfs_3] = rho * u_1 * u_2 * -0.25f + rho * u_1 * -0.083333333333333329f + rho * u_2 * 0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_1 * u_1) + rho * 0.083333333333333329f * (u_2 * u_2);
70 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 13 * _stride_pdfs_3] = rho * u_0 * u_2 * -0.25f + rho * u_0 * -0.083333333333333329f + rho * u_2 * 0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_0 * u_0) + rho * 0.083333333333333329f * (u_2 * u_2);
71 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 14 * _stride_pdfs_3] = rho * u_0 * u_2 * 0.25f + rho * u_0 * 0.083333333333333329f + rho * u_2 * 0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_0 * u_0) + rho * 0.083333333333333329f * (u_2 * u_2);
72 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 15 * _stride_pdfs_3] = rho * u_1 * u_2 * -0.25f + rho * u_1 * 0.083333333333333329f + rho * u_2 * -0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_1 * u_1) + rho * 0.083333333333333329f * (u_2 * u_2);
73 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 16 * _stride_pdfs_3] = rho * u_1 * u_2 * 0.25f + rho * u_1 * -0.083333333333333329f + rho * u_2 * -0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_1 * u_1) + rho * 0.083333333333333329f * (u_2 * u_2);
74 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 17 * _stride_pdfs_3] = rho * u_0 * u_2 * 0.25f + rho * u_0 * -0.083333333333333329f + rho * u_2 * -0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_0 * u_0) + rho * 0.083333333333333329f * (u_2 * u_2);
75 _data_pdfs[_stride_pdfs_0 * ctr_0 + _stride_pdfs_1 * ctr_1 + _stride_pdfs_2 * ctr_2 + 18 * _stride_pdfs_3] = rho * u_0 * u_2 * -0.25f + rho * u_0 * 0.083333333333333329f + rho * u_2 * -0.083333333333333329f + rho * 0.027777777777777776f + rho * 0.083333333333333329f * (u_0 * u_0) + rho * 0.083333333333333329f * (u_2 * u_2);
76 }
77 }
78 }
79}
80} // namespace internal_b8085d63d6b7e842485134abbac511e8
81
82void InitialPDFsSetterSinglePrecision::run(IBlock *block) {
83
84 auto velocity = block->getData<field::GhostLayerField<float, 3>>(velocityID);
85 auto pdfs = block->getData<field::GhostLayerField<float, 19>>(pdfsID);
86 auto force = block->getData<field::GhostLayerField<float, 3>>(forceID);
87
88 auto &rho_0 = this->rho_0_;
89 WALBERLA_ASSERT_GREATER_EQUAL(0, -int_c(force->nrOfGhostLayers()))
90 float *RESTRICT const _data_force = force->dataAt(0, 0, 0, 0);
91 WALBERLA_ASSERT_EQUAL(force->layout(), field::fzyx)
92 WALBERLA_ASSERT_GREATER_EQUAL(0, -int_c(pdfs->nrOfGhostLayers()))
93 float *RESTRICT _data_pdfs = pdfs->dataAt(0, 0, 0, 0);
94 WALBERLA_ASSERT_EQUAL(pdfs->layout(), field::fzyx)
95 WALBERLA_ASSERT_GREATER_EQUAL(0, -int_c(velocity->nrOfGhostLayers()))
96 float *RESTRICT const _data_velocity = velocity->dataAt(0, 0, 0, 0);
97 WALBERLA_ASSERT_EQUAL(velocity->layout(), field::fzyx)
98 WALBERLA_ASSERT_GREATER_EQUAL(force->xSizeWithGhostLayer(), int64_t(int64_c(force->xSize()) + 0))
99 const int64_t _size_force_0 = int64_t(int64_c(force->xSize()) + 0);
100 WALBERLA_ASSERT_EQUAL(force->layout(), field::fzyx)
101 WALBERLA_ASSERT_GREATER_EQUAL(force->ySizeWithGhostLayer(), int64_t(int64_c(force->ySize()) + 0))
102 const int64_t _size_force_1 = int64_t(int64_c(force->ySize()) + 0);
103 WALBERLA_ASSERT_EQUAL(force->layout(), field::fzyx)
104 WALBERLA_ASSERT_GREATER_EQUAL(force->zSizeWithGhostLayer(), int64_t(int64_c(force->zSize()) + 0))
105 const int64_t _size_force_2 = int64_t(int64_c(force->zSize()) + 0);
106 WALBERLA_ASSERT_EQUAL(force->layout(), field::fzyx)
107 const int64_t _stride_force_0 = int64_t(force->xStride());
108 const int64_t _stride_force_1 = int64_t(force->yStride());
109 const int64_t _stride_force_2 = int64_t(force->zStride());
110 const int64_t _stride_force_3 = int64_t(1 * int64_t(force->fStride()));
111 const int64_t _stride_pdfs_0 = int64_t(pdfs->xStride());
112 const int64_t _stride_pdfs_1 = int64_t(pdfs->yStride());
113 const int64_t _stride_pdfs_2 = int64_t(pdfs->zStride());
114 const int64_t _stride_pdfs_3 = int64_t(1 * int64_t(pdfs->fStride()));
115 const int64_t _stride_velocity_0 = int64_t(velocity->xStride());
116 const int64_t _stride_velocity_1 = int64_t(velocity->yStride());
117 const int64_t _stride_velocity_2 = int64_t(velocity->zStride());
118 const int64_t _stride_velocity_3 = int64_t(1 * int64_t(velocity->fStride()));
119 internal_b8085d63d6b7e842485134abbac511e8::initialpdfssettersingleprecision_initialpdfssettersingleprecision(_data_force, _data_pdfs, _data_velocity, _size_force_0, _size_force_1, _size_force_2, _stride_force_0, _stride_force_1, _stride_force_2, _stride_force_3, _stride_pdfs_0, _stride_pdfs_1, _stride_pdfs_2, _stride_pdfs_3, _stride_velocity_0, _stride_velocity_1, _stride_velocity_2, _stride_velocity_3, rho_0);
120}
121
122void InitialPDFsSetterSinglePrecision::runOnCellInterval(const shared_ptr<StructuredBlockStorage> &blocks, const CellInterval &globalCellInterval, cell_idx_t ghostLayers, IBlock *block) {
123
124 CellInterval ci = globalCellInterval;
125 CellInterval blockBB = blocks->getBlockCellBB(*block);
126 blockBB.expand(ghostLayers);
127 ci.intersect(blockBB);
128 blocks->transformGlobalToBlockLocalCellInterval(ci, *block);
129 if (ci.empty())
130 return;
131
132 auto velocity = block->getData<field::GhostLayerField<float, 3>>(velocityID);
133 auto pdfs = block->getData<field::GhostLayerField<float, 19>>(pdfsID);
134 auto force = block->getData<field::GhostLayerField<float, 3>>(forceID);
135
136 auto &rho_0 = this->rho_0_;
137 WALBERLA_ASSERT_GREATER_EQUAL(ci.xMin(), -int_c(force->nrOfGhostLayers()))
138 WALBERLA_ASSERT_GREATER_EQUAL(ci.yMin(), -int_c(force->nrOfGhostLayers()))
139 WALBERLA_ASSERT_GREATER_EQUAL(ci.zMin(), -int_c(force->nrOfGhostLayers()))
140 float *RESTRICT const _data_force = force->dataAt(ci.xMin(), ci.yMin(), ci.zMin(), 0);
141 WALBERLA_ASSERT_EQUAL(force->layout(), field::fzyx)
142 WALBERLA_ASSERT_GREATER_EQUAL(ci.xMin(), -int_c(pdfs->nrOfGhostLayers()))
143 WALBERLA_ASSERT_GREATER_EQUAL(ci.yMin(), -int_c(pdfs->nrOfGhostLayers()))
144 WALBERLA_ASSERT_GREATER_EQUAL(ci.zMin(), -int_c(pdfs->nrOfGhostLayers()))
145 float *RESTRICT _data_pdfs = pdfs->dataAt(ci.xMin(), ci.yMin(), ci.zMin(), 0);
146 WALBERLA_ASSERT_EQUAL(pdfs->layout(), field::fzyx)
147 WALBERLA_ASSERT_GREATER_EQUAL(ci.xMin(), -int_c(velocity->nrOfGhostLayers()))
148 WALBERLA_ASSERT_GREATER_EQUAL(ci.yMin(), -int_c(velocity->nrOfGhostLayers()))
149 WALBERLA_ASSERT_GREATER_EQUAL(ci.zMin(), -int_c(velocity->nrOfGhostLayers()))
150 float *RESTRICT const _data_velocity = velocity->dataAt(ci.xMin(), ci.yMin(), ci.zMin(), 0);
151 WALBERLA_ASSERT_EQUAL(velocity->layout(), field::fzyx)
152 WALBERLA_ASSERT_GREATER_EQUAL(force->xSizeWithGhostLayer(), int64_t(int64_c(ci.xSize()) + 0))
153 const int64_t _size_force_0 = int64_t(int64_c(ci.xSize()) + 0);
154 WALBERLA_ASSERT_EQUAL(force->layout(), field::fzyx)
155 WALBERLA_ASSERT_GREATER_EQUAL(force->ySizeWithGhostLayer(), int64_t(int64_c(ci.ySize()) + 0))
156 const int64_t _size_force_1 = int64_t(int64_c(ci.ySize()) + 0);
157 WALBERLA_ASSERT_EQUAL(force->layout(), field::fzyx)
158 WALBERLA_ASSERT_GREATER_EQUAL(force->zSizeWithGhostLayer(), int64_t(int64_c(ci.zSize()) + 0))
159 const int64_t _size_force_2 = int64_t(int64_c(ci.zSize()) + 0);
160 WALBERLA_ASSERT_EQUAL(force->layout(), field::fzyx)
161 const int64_t _stride_force_0 = int64_t(force->xStride());
162 const int64_t _stride_force_1 = int64_t(force->yStride());
163 const int64_t _stride_force_2 = int64_t(force->zStride());
164 const int64_t _stride_force_3 = int64_t(1 * int64_t(force->fStride()));
165 const int64_t _stride_pdfs_0 = int64_t(pdfs->xStride());
166 const int64_t _stride_pdfs_1 = int64_t(pdfs->yStride());
167 const int64_t _stride_pdfs_2 = int64_t(pdfs->zStride());
168 const int64_t _stride_pdfs_3 = int64_t(1 * int64_t(pdfs->fStride()));
169 const int64_t _stride_velocity_0 = int64_t(velocity->xStride());
170 const int64_t _stride_velocity_1 = int64_t(velocity->yStride());
171 const int64_t _stride_velocity_2 = int64_t(velocity->zStride());
172 const int64_t _stride_velocity_3 = int64_t(1 * int64_t(velocity->fStride()));
173 internal_b8085d63d6b7e842485134abbac511e8::initialpdfssettersingleprecision_initialpdfssettersingleprecision(_data_force, _data_pdfs, _data_velocity, _size_force_0, _size_force_1, _size_force_2, _stride_force_0, _stride_force_1, _stride_force_2, _stride_force_3, _stride_pdfs_0, _stride_pdfs_1, _stride_pdfs_2, _stride_pdfs_3, _stride_velocity_0, _stride_velocity_1, _stride_velocity_2, _stride_velocity_3, rho_0);
174}
175
176} // namespace pystencils
177} // namespace walberla
178
179#if (defined WALBERLA_CXX_COMPILER_IS_GNU) || (defined WALBERLA_CXX_COMPILER_IS_CLANG)
180#pragma GCC diagnostic pop
181#endif
182
183#if (defined WALBERLA_CXX_COMPILER_IS_INTEL)
184#pragma warning pop
185#endif
FUNC_PREFIX
#define FUNC_PREFIX
\file AdvectiveFluxKernel_double_precision.cpp \author pystencils
Definition AdvectiveFluxKernel_double_precision.cpp:28
RESTRICT
#define RESTRICT
\file AdvectiveFluxKernel_double_precision.h \author pystencils
Definition AdvectiveFluxKernel_double_precision.h:40
walberla::pystencils::InitialPDFsSetterSinglePrecision::runOnCellInterval
void runOnCellInterval(const shared_ptr< StructuredBlockStorage > &blocks, const CellInterval &globalCellInterval, cell_idx_t ghostLayers, IBlock *block)
Definition InitialPDFsSetterSinglePrecision.cpp:122
block
static double * block(double *p, std::size_t index, std::size_t size)
Definition elc.cpp:172
walberla::pystencils::internal_b8085d63d6b7e842485134abbac511e8::initialpdfssettersingleprecision_initialpdfssettersingleprecision
static FUNC_PREFIX void initialpdfssettersingleprecision_initialpdfssettersingleprecision(float *RESTRICT const _data_force, float *RESTRICT _data_pdfs, float *RESTRICT const _data_velocity, int64_t const _size_force_0, int64_t const _size_force_1, int64_t const _size_force_2, int64_t const _stride_force_0, int64_t const _stride_force_1, int64_t const _stride_force_2, int64_t const _stride_force_3, int64_t const _stride_pdfs_0, int64_t const _stride_pdfs_1, int64_t const _stride_pdfs_2, int64_t const _stride_pdfs_3, int64_t const _stride_velocity_0, int64_t const _stride_velocity_1, int64_t const _stride_velocity_2, int64_t const _stride_velocity_3, float rho_0)
Definition InitialPDFsSetterSinglePrecision.cpp:49
walberla
\file PackInfoPdfDoublePrecision.cpp \author pystencils
Definition EKWalberla.hpp:36
velocity
static Utils::Vector3d velocity(Particle const &p_ref, Particle const &p_vs)
Velocity of the virtual site.
Definition relative.cpp:64