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1 /***************************************************************************** |
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2 |
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3 OscSinCos.hpp |
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4 Copyright (c) 2005 Laurent de Soras |
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5 |
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6 --- Legal stuff --- |
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7 |
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8 This library is free software; you can redistribute it and/or |
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9 modify it under the terms of the GNU Lesser General Public |
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10 License as published by the Free Software Foundation; either |
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11 version 2.1 of the License, or (at your option) any later version. |
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12 |
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13 This library is distributed in the hope that it will be useful, |
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 Lesser General Public License for more details. |
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17 |
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18 You should have received a copy of the GNU Lesser General Public |
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19 License along with this library; if not, write to the Free Software |
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20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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21 |
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22 *Tab=3***********************************************************************/ |
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23 |
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24 |
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25 |
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26 #if defined (OscSinCos_CURRENT_CODEHEADER) |
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27 #error Recursive inclusion of OscSinCos code header. |
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28 #endif |
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29 #define OscSinCos_CURRENT_CODEHEADER |
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30 |
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31 #if ! defined (OscSinCos_CODEHEADER_INCLUDED) |
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32 #define OscSinCos_CODEHEADER_INCLUDED |
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33 |
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34 |
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35 |
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36 /*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/ |
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37 |
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38 #include <cmath> |
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39 |
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40 namespace std { } |
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41 |
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42 |
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43 |
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44 /*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/ |
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45 |
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46 |
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47 |
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48 template <class T> |
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49 OscSinCos <T>::OscSinCos () |
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50 : _pos_cos (1) |
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51 , _pos_sin (0) |
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52 , _step_cos (1) |
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53 , _step_sin (0) |
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54 { |
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55 // Nothing |
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56 } |
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57 |
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58 |
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59 |
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60 template <class T> |
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61 void OscSinCos <T>::set_step (double angle_rad) |
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62 { |
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63 using namespace std; |
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64 |
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65 _step_cos = static_cast <DataType> (cos (angle_rad)); |
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66 _step_sin = static_cast <DataType> (sin (angle_rad)); |
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67 } |
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68 |
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69 |
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70 |
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71 template <class T> |
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72 typename OscSinCos <T>::DataType OscSinCos <T>::get_cos () const |
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73 { |
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74 return (_pos_cos); |
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75 } |
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76 |
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77 |
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78 |
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79 template <class T> |
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80 typename OscSinCos <T>::DataType OscSinCos <T>::get_sin () const |
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81 { |
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82 return (_pos_sin); |
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83 } |
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84 |
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85 |
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86 |
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87 template <class T> |
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88 void OscSinCos <T>::step () |
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89 { |
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90 const DataType old_cos = _pos_cos; |
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91 const DataType old_sin = _pos_sin; |
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92 |
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93 _pos_cos = old_cos * _step_cos - old_sin * _step_sin; |
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94 _pos_sin = old_cos * _step_sin + old_sin * _step_cos; |
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95 } |
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96 |
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97 |
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98 |
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99 template <class T> |
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100 void OscSinCos <T>::clear_buffers () |
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101 { |
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102 _pos_cos = static_cast <DataType> (1); |
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103 _pos_sin = static_cast <DataType> (0); |
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104 } |
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105 |
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106 |
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107 |
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108 /*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/ |
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109 |
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110 |
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111 |
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112 /*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/ |
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113 |
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114 |
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115 |
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116 #endif // OscSinCos_CODEHEADER_INCLUDED |
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117 |
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118 #undef OscSinCos_CURRENT_CODEHEADER |
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119 |
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120 |
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121 |
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122 /*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/ |