1 | // -*- C++ -*- |
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2 | /*************************************************************************** |
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3 | * blitz/array/geometry.h Basic mapping from Array to physical geometry, |
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4 | * used for some stencil operations. |
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5 | * |
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6 | * $Id$ |
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7 | * |
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8 | * Copyright (C) 1997-2011 Todd Veldhuizen <tveldhui@acm.org> |
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9 | * |
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10 | * This file is a part of Blitz. |
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11 | * |
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12 | * Blitz is free software: you can redistribute it and/or modify |
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13 | * it under the terms of the GNU Lesser General Public License |
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14 | * as published by the Free Software Foundation, either version 3 |
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15 | * of the License, or (at your option) any later version. |
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16 | * |
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17 | * Blitz is distributed in the hope that it will be useful, |
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18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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20 | * GNU Lesser General Public License for more details. |
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21 | * |
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22 | * You should have received a copy of the GNU Lesser General Public |
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23 | * License along with Blitz. If not, see <http://www.gnu.org/licenses/>. |
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24 | * |
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25 | * Suggestions: blitz-devel@lists.sourceforge.net |
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26 | * Bugs: blitz-support@lists.sourceforge.net |
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27 | * |
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28 | * For more information, please see the Blitz++ Home Page: |
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29 | * https://sourceforge.net/projects/blitz/ |
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30 | * |
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31 | ****************************************************************************/ |
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32 | #ifndef BZ_GEOMETRY_H |
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33 | #define BZ_GEOMETRY_H |
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34 | |
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35 | #ifndef BZ_ARRAY_H |
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36 | #error <blitz/array/geometry.h> must be included after <blitz/array.h> |
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37 | #endif |
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38 | |
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39 | BZ_NAMESPACE(blitz) |
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40 | |
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41 | typedef double T_defaultSpatialCoordinate; |
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42 | |
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43 | template<int N_dim, typename T = T_defaultSpatialCoordinate> |
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44 | class UniformOrthoGeometry { |
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45 | public: |
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46 | }; |
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47 | |
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48 | template<int N_dim, typename T = T_defaultSpatialCoordinate> |
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49 | class UniformCubicGeometry { |
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50 | T h_; |
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51 | T recip_h_; |
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52 | T recip2_h_; |
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53 | T recip3_h_; |
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54 | TinyVector<T,N_dim> zero_; |
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55 | |
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56 | public: |
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57 | typedef T T_coord; |
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58 | |
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59 | UniformCubicGeometry() |
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60 | { |
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61 | h_ = 0.0; |
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62 | recip_h_ = 0.0; |
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63 | recip2_h_ = 0.0; |
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64 | recip3_h_ = 0.0; |
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65 | zero_ = 0.0; |
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66 | } |
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67 | |
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68 | UniformCubicGeometry(T spatialStep) |
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69 | { |
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70 | h_ = spatialStep; |
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71 | zero_ = T(0); |
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72 | setup(); |
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73 | } |
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74 | |
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75 | UniformCubicGeometry(T spatialStep, TinyVector<T,N_dim> zeroCoordinates) |
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76 | { |
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77 | h_ = spatialStep; |
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78 | zero_ = zeroCoordinates; |
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79 | setup(); |
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80 | } |
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81 | |
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82 | TinyVector<T,N_dim> toSpatial(TinyVector<int,N_dim> logicalCoord) const |
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83 | { |
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84 | return zero_ + h_ * logicalCoord; |
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85 | } |
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86 | |
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87 | T spatialStep() const |
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88 | { return h_; } |
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89 | |
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90 | T recipSpatialStep() const |
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91 | { return recip_h_; } |
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92 | |
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93 | T recipSpatialStepPow2() const |
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94 | { return recip2_h_; } |
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95 | |
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96 | private: |
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97 | void setup() |
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98 | { |
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99 | recip_h_ = 1.0 / h_; |
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100 | recip2_h_ = 1.0 / pow2(h_); |
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101 | recip3_h_ = 1.0 / pow3(h_); |
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102 | } |
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103 | }; |
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104 | |
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105 | template<int N_dim, typename T = T_defaultSpatialCoordinate> |
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106 | class TensorProductGeometry { |
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107 | public: |
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108 | }; |
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109 | |
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110 | BZ_NAMESPACE_END |
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111 | |
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112 | #endif // BZ_GEOMETRY_H |
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