| 1 | /// @ref gtx_transform2 |
| 2 | |
| 3 | namespace glm |
| 4 | { |
| 5 | template<typename T, qualifier Q> |
| 6 | GLM_FUNC_QUALIFIER mat<3, 3, T, Q> shearX2D(mat<3, 3, T, Q> const& m, T s) |
| 7 | { |
| 8 | mat<3, 3, T, Q> r(1); |
| 9 | r[1][0] = s; |
| 10 | return m * r; |
| 11 | } |
| 12 | |
| 13 | template<typename T, qualifier Q> |
| 14 | GLM_FUNC_QUALIFIER mat<3, 3, T, Q> shearY2D(mat<3, 3, T, Q> const& m, T s) |
| 15 | { |
| 16 | mat<3, 3, T, Q> r(1); |
| 17 | r[0][1] = s; |
| 18 | return m * r; |
| 19 | } |
| 20 | |
| 21 | template<typename T, qualifier Q> |
| 22 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> shearX3D(mat<4, 4, T, Q> const& m, T s, T t) |
| 23 | { |
| 24 | mat<4, 4, T, Q> r(1); |
| 25 | r[0][1] = s; |
| 26 | r[0][2] = t; |
| 27 | return m * r; |
| 28 | } |
| 29 | |
| 30 | template<typename T, qualifier Q> |
| 31 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> shearY3D(mat<4, 4, T, Q> const& m, T s, T t) |
| 32 | { |
| 33 | mat<4, 4, T, Q> r(1); |
| 34 | r[1][0] = s; |
| 35 | r[1][2] = t; |
| 36 | return m * r; |
| 37 | } |
| 38 | |
| 39 | template<typename T, qualifier Q> |
| 40 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> shearZ3D(mat<4, 4, T, Q> const& m, T s, T t) |
| 41 | { |
| 42 | mat<4, 4, T, Q> r(1); |
| 43 | r[2][0] = s; |
| 44 | r[2][1] = t; |
| 45 | return m * r; |
| 46 | } |
| 47 | |
| 48 | template<typename T, qualifier Q> |
| 49 | GLM_FUNC_QUALIFIER mat<3, 3, T, Q> reflect2D(mat<3, 3, T, Q> const& m, vec<2, T, Q> const& normal, T distance) |
| 50 | { |
| 51 | mat<3, 3, T, Q> r(static_cast<T>(1)); |
| 52 | r[0][0] = static_cast<T>(1) - static_cast<T>(2) * normal.x * normal.x; |
| 53 | r[0][1] = -static_cast<T>(2) * normal.y * normal.x; |
| 54 | r[1][0] = -static_cast<T>(2) * normal.x * normal.y; |
| 55 | r[1][1] = static_cast<T>(1) - static_cast<T>(2) * normal.y * normal.y; |
| 56 | r[2][0] = -static_cast<T>(2) * normal.x * distance; |
| 57 | r[2][1] = -static_cast<T>(2) * normal.y * distance; |
| 58 | return m * r; |
| 59 | } |
| 60 | |
| 61 | template<typename T, qualifier Q> |
| 62 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> reflect3D(mat<4, 4, T, Q> const& m, vec<3, T, Q> const& normal, T distance) |
| 63 | { |
| 64 | mat<4, 4, T, Q> r(static_cast<T>(1)); |
| 65 | r[0][0] = static_cast<T>(1) - static_cast<T>(2) * normal.x * normal.x; |
| 66 | r[0][1] = -static_cast<T>(2) * normal.y * normal.x; |
| 67 | r[0][2] = -static_cast<T>(2) * normal.z * normal.x; |
| 68 | r[1][0] = -static_cast<T>(2) * normal.x * normal.y; |
| 69 | r[1][1] = static_cast<T>(1) - static_cast<T>(2) * normal.y * normal.y; |
| 70 | r[1][2] = -static_cast<T>(2) * normal.z * normal.y; |
| 71 | r[2][0] = -static_cast<T>(2) * normal.x * normal.z; |
| 72 | r[2][1] = -static_cast<T>(2) * normal.y * normal.z; |
| 73 | r[2][2] = static_cast<T>(1) - static_cast<T>(2) * normal.z * normal.z; |
| 74 | r[3][0] = -static_cast<T>(2) * normal.x * distance; |
| 75 | r[3][1] = -static_cast<T>(2) * normal.y * distance; |
| 76 | r[3][2] = -static_cast<T>(2) * normal.z * distance; |
| 77 | return m * r; |
| 78 | } |
| 79 | |
| 80 | template<typename T, qualifier Q> |
| 81 | GLM_FUNC_QUALIFIER mat<3, 3, T, Q> proj2D( |
| 82 | const mat<3, 3, T, Q>& m, |
| 83 | const vec<3, T, Q>& normal) |
| 84 | { |
| 85 | mat<3, 3, T, Q> r(static_cast<T>(1)); |
| 86 | r[0][0] = static_cast<T>(1) - normal.x * normal.x; |
| 87 | r[0][1] = - normal.x * normal.y; |
| 88 | r[1][0] = - normal.x * normal.y; |
| 89 | r[1][1] = static_cast<T>(1) - normal.y * normal.y; |
| 90 | return m * r; |
| 91 | } |
| 92 | |
| 93 | template<typename T, qualifier Q> |
| 94 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> proj3D( |
| 95 | const mat<4, 4, T, Q>& m, |
| 96 | const vec<3, T, Q>& normal) |
| 97 | { |
| 98 | mat<4, 4, T, Q> r(static_cast<T>(1)); |
| 99 | r[0][0] = static_cast<T>(1) - normal.x * normal.x; |
| 100 | r[0][1] = - normal.x * normal.y; |
| 101 | r[0][2] = - normal.x * normal.z; |
| 102 | r[1][0] = - normal.x * normal.y; |
| 103 | r[1][1] = static_cast<T>(1) - normal.y * normal.y; |
| 104 | r[1][2] = - normal.y * normal.z; |
| 105 | r[2][0] = - normal.x * normal.z; |
| 106 | r[2][1] = - normal.y * normal.z; |
| 107 | r[2][2] = static_cast<T>(1) - normal.z * normal.z; |
| 108 | return m * r; |
| 109 | } |
| 110 | |
| 111 | template<typename T, qualifier Q> |
| 112 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> scaleBias(T scale, T bias) |
| 113 | { |
| 114 | mat<4, 4, T, Q> result; |
| 115 | result[3] = vec<4, T, Q>(vec<3, T, Q>(bias), static_cast<T>(1)); |
| 116 | result[0][0] = scale; |
| 117 | result[1][1] = scale; |
| 118 | result[2][2] = scale; |
| 119 | return result; |
| 120 | } |
| 121 | |
| 122 | template<typename T, qualifier Q> |
| 123 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> scaleBias(mat<4, 4, T, Q> const& m, T scale, T bias) |
| 124 | { |
| 125 | return m * scaleBias<T, Q>(scale, bias); |
| 126 | } |
| 127 | }//namespace glm |
| 128 | |