1 /////////////////////////////////////////////////////////////////////////////////////////////////// 2 // OpenGL Mathematics Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net) 3 /////////////////////////////////////////////////////////////////////////////////////////////////// 4 // Created : 2005-02-28 5 // Updated : 2005-04-23 6 // Licence : This source is under MIT License 7 // File : glm/gtx/transform2.inl 8 /////////////////////////////////////////////////////////////////////////////////////////////////// 9 10 namespace glm 11 { 12 template <typename T, precision P> 13 GLM_FUNC_QUALIFIER detail::tmat3x3<T, P> shearX2D( 14 const detail::tmat3x3<T, P>& m, 15 T s) 16 { 17 detail::tmat3x3<T, P> r(1); 18 r[0][1] = s; 19 return m * r; 20 } 21 22 template <typename T, precision P> 23 GLM_FUNC_QUALIFIER detail::tmat3x3<T, P> shearY2D( 24 const detail::tmat3x3<T, P>& m, 25 T s) 26 { 27 detail::tmat3x3<T, P> r(1); 28 r[1][0] = s; 29 return m * r; 30 } 31 32 template <typename T, precision P> 33 GLM_FUNC_QUALIFIER detail::tmat4x4<T, P> shearX3D( 34 const detail::tmat4x4<T, P>& m, 35 T s, 36 T t) 37 { 38 detail::tmat4x4<T, P> r(1); 39 r[1][0] = s; 40 r[2][0] = t; 41 return m * r; 42 } 43 44 template <typename T, precision P> 45 GLM_FUNC_QUALIFIER detail::tmat4x4<T, P> shearY3D( 46 const detail::tmat4x4<T, P>& m, 47 T s, 48 T t) 49 { 50 detail::tmat4x4<T, P> r(1); 51 r[0][1] = s; 52 r[2][1] = t; 53 return m * r; 54 } 55 56 template <typename T, precision P> 57 GLM_FUNC_QUALIFIER detail::tmat4x4<T, P> shearZ3D( 58 const detail::tmat4x4<T, P>& m, 59 T s, 60 T t) 61 { 62 detail::tmat4x4<T, P> r(1); 63 r[0][2] = s; 64 r[1][2] = t; 65 return m * r; 66 } 67 68 template <typename T, precision P> 69 GLM_FUNC_QUALIFIER detail::tmat3x3<T, P> reflect2D( 70 const detail::tmat3x3<T, P>& m, 71 const detail::tvec3<T, P>& normal) 72 { 73 detail::tmat3x3<T, P> r(1); 74 r[0][0] = 1 - 2 * normal.x * normal.x; 75 r[0][1] = -2 * normal.x * normal.y; 76 r[1][0] = -2 * normal.x * normal.y; 77 r[1][1] = 1 - 2 * normal.y * normal.y; 78 return m * r; 79 } 80 81 template <typename T, precision P> 82 GLM_FUNC_QUALIFIER detail::tmat4x4<T, P> reflect3D( 83 const detail::tmat4x4<T, P>& m, 84 const detail::tvec3<T, P>& normal) 85 { 86 detail::tmat4x4<T, P> r(1); 87 r[0][0] = 1 - 2 * normal.x * normal.x; 88 r[0][1] = -2 * normal.x * normal.y; 89 r[0][2] = -2 * normal.x * normal.z; 90 91 r[1][0] = -2 * normal.x * normal.y; 92 r[1][1] = 1 - 2 * normal.y * normal.y; 93 r[1][2] = -2 * normal.y * normal.z; 94 95 r[2][0] = -2 * normal.x * normal.z; 96 r[2][1] = -2 * normal.y * normal.z; 97 r[2][2] = 1 - 2 * normal.z * normal.z; 98 return m * r; 99 } 100 101 template <typename T, precision P> 102 GLM_FUNC_QUALIFIER detail::tmat3x3<T, P> proj2D( 103 const detail::tmat3x3<T, P>& m, 104 const detail::tvec3<T, P>& normal) 105 { 106 detail::tmat3x3<T, P> r(1); 107 r[0][0] = 1 - normal.x * normal.x; 108 r[0][1] = - normal.x * normal.y; 109 r[1][0] = - normal.x * normal.y; 110 r[1][1] = 1 - normal.y * normal.y; 111 return m * r; 112 } 113 114 template <typename T, precision P> 115 GLM_FUNC_QUALIFIER detail::tmat4x4<T, P> proj3D( 116 const detail::tmat4x4<T, P>& m, 117 const detail::tvec3<T, P>& normal) 118 { 119 detail::tmat4x4<T, P> r(1); 120 r[0][0] = 1 - normal.x * normal.x; 121 r[0][1] = - normal.x * normal.y; 122 r[0][2] = - normal.x * normal.z; 123 r[1][0] = - normal.x * normal.y; 124 r[1][1] = 1 - normal.y * normal.y; 125 r[1][2] = - normal.y * normal.z; 126 r[2][0] = - normal.x * normal.z; 127 r[2][1] = - normal.y * normal.z; 128 r[2][2] = 1 - normal.z * normal.z; 129 return m * r; 130 } 131 132 template <typename T, precision P> 133 GLM_FUNC_QUALIFIER detail::tmat4x4<T, P> scaleBias( 134 T scale, 135 T bias) 136 { 137 detail::tmat4x4<T, P> result; 138 result[3] = detail::tvec4<T, P>(detail::tvec3<T, P>(bias), T(1)); 139 result[0][0] = scale; 140 result[1][1] = scale; 141 result[2][2] = scale; 142 return result; 143 } 144 145 template <typename T, precision P> 146 GLM_FUNC_QUALIFIER detail::tmat4x4<T, P> scaleBias( 147 const detail::tmat4x4<T, P>& m, 148 T scale, 149 T bias) 150 { 151 return m * scaleBias(scale, bias); 152 } 153 }//namespace glm 154 155
