| 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<3, T, Q> const& normal) |
| 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.x * normal.y; |
| 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 | return m * r; |
| 57 | } |
| 58 | |
| 59 | template<typename T, qualifier Q> |
| 60 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> reflect3D(mat<4, 4, T, Q> const& m, vec<3, T, Q> const& normal) |
| 61 | { |
| 62 | mat<4, 4, T, Q> r(static_cast<T>(1)); |
| 63 | r[0][0] = static_cast<T>(1) - static_cast<T>(2) * normal.x * normal.x; |
| 64 | r[0][1] = -static_cast<T>(2) * normal.x * normal.y; |
| 65 | r[0][2] = -static_cast<T>(2) * normal.x * normal.z; |
| 66 | |
| 67 | r[1][0] = -static_cast<T>(2) * normal.x * normal.y; |
| 68 | r[1][1] = static_cast<T>(1) - static_cast<T>(2) * normal.y * normal.y; |
| 69 | r[1][2] = -static_cast<T>(2) * normal.y * normal.z; |
| 70 | |
| 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 | return m * r; |
| 75 | } |
| 76 | |
| 77 | template<typename T, qualifier Q> |
| 78 | GLM_FUNC_QUALIFIER mat<3, 3, T, Q> proj2D( |
| 79 | const mat<3, 3, T, Q>& m, |
| 80 | const vec<3, T, Q>& normal) |
| 81 | { |
| 82 | mat<3, 3, T, Q> r(static_cast<T>(1)); |
| 83 | r[0][0] = static_cast<T>(1) - normal.x * normal.x; |
| 84 | r[0][1] = - normal.x * normal.y; |
| 85 | r[1][0] = - normal.x * normal.y; |
| 86 | r[1][1] = static_cast<T>(1) - normal.y * normal.y; |
| 87 | return m * r; |
| 88 | } |
| 89 | |
| 90 | template<typename T, qualifier Q> |
| 91 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> proj3D( |
| 92 | const mat<4, 4, T, Q>& m, |
| 93 | const vec<3, T, Q>& normal) |
| 94 | { |
| 95 | mat<4, 4, T, Q> r(static_cast<T>(1)); |
| 96 | r[0][0] = static_cast<T>(1) - normal.x * normal.x; |
| 97 | r[0][1] = - normal.x * normal.y; |
| 98 | r[0][2] = - normal.x * normal.z; |
| 99 | r[1][0] = - normal.x * normal.y; |
| 100 | r[1][1] = static_cast<T>(1) - normal.y * normal.y; |
| 101 | r[1][2] = - normal.y * normal.z; |
| 102 | r[2][0] = - normal.x * normal.z; |
| 103 | r[2][1] = - normal.y * normal.z; |
| 104 | r[2][2] = static_cast<T>(1) - normal.z * normal.z; |
| 105 | return m * r; |
| 106 | } |
| 107 | |
| 108 | template<typename T, qualifier Q> |
| 109 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> scaleBias(T scale, T bias) |
| 110 | { |
| 111 | mat<4, 4, T, Q> result; |
| 112 | result[3] = vec<4, T, Q>(vec<3, T, Q>(bias), static_cast<T>(1)); |
| 113 | result[0][0] = scale; |
| 114 | result[1][1] = scale; |
| 115 | result[2][2] = scale; |
| 116 | return result; |
| 117 | } |
| 118 | |
| 119 | template<typename T, qualifier Q> |
| 120 | GLM_FUNC_QUALIFIER mat<4, 4, T, Q> scaleBias(mat<4, 4, T, Q> const& m, T scale, T bias) |
| 121 | { |
| 122 | return m * scaleBias(scale, bias); |
| 123 | } |
| 124 | }//namespace glm |
| 125 | |