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Diffstat (limited to 'src/include/glm/ext/matrix_transform.inl')
| -rw-r--r-- | src/include/glm/ext/matrix_transform.inl | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/include/glm/ext/matrix_transform.inl b/src/include/glm/ext/matrix_transform.inl new file mode 100644 index 0000000..4e122f6 --- /dev/null +++ b/src/include/glm/ext/matrix_transform.inl @@ -0,0 +1,152 @@ +namespace glm
+{
+ template<typename genType>
+ GLM_FUNC_QUALIFIER GLM_CONSTEXPR genType identity()
+ {
+ return detail::init_gentype<genType, detail::genTypeTrait<genType>::GENTYPE>::identity();
+ }
+
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER mat<4, 4, T, Q> translate(mat<4, 4, T, Q> const& m, vec<3, T, Q> const& v)
+ {
+ mat<4, 4, T, Q> Result(m);
+ Result[3] = m[0] * v[0] + m[1] * v[1] + m[2] * v[2] + m[3];
+ return Result;
+ }
+
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER mat<4, 4, T, Q> rotate(mat<4, 4, T, Q> const& m, T angle, vec<3, T, Q> const& v)
+ {
+ T const a = angle;
+ T const c = cos(a);
+ T const s = sin(a);
+
+ vec<3, T, Q> axis(normalize(v));
+ vec<3, T, Q> temp((T(1) - c) * axis);
+
+ mat<4, 4, T, Q> Rotate;
+ Rotate[0][0] = c + temp[0] * axis[0];
+ Rotate[0][1] = temp[0] * axis[1] + s * axis[2];
+ Rotate[0][2] = temp[0] * axis[2] - s * axis[1];
+
+ Rotate[1][0] = temp[1] * axis[0] - s * axis[2];
+ Rotate[1][1] = c + temp[1] * axis[1];
+ Rotate[1][2] = temp[1] * axis[2] + s * axis[0];
+
+ Rotate[2][0] = temp[2] * axis[0] + s * axis[1];
+ Rotate[2][1] = temp[2] * axis[1] - s * axis[0];
+ Rotate[2][2] = c + temp[2] * axis[2];
+
+ mat<4, 4, T, Q> Result;
+ Result[0] = m[0] * Rotate[0][0] + m[1] * Rotate[0][1] + m[2] * Rotate[0][2];
+ Result[1] = m[0] * Rotate[1][0] + m[1] * Rotate[1][1] + m[2] * Rotate[1][2];
+ Result[2] = m[0] * Rotate[2][0] + m[1] * Rotate[2][1] + m[2] * Rotate[2][2];
+ Result[3] = m[3];
+ return Result;
+ }
+
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER mat<4, 4, T, Q> rotate_slow(mat<4, 4, T, Q> const& m, T angle, vec<3, T, Q> const& v)
+ {
+ T const a = angle;
+ T const c = cos(a);
+ T const s = sin(a);
+ mat<4, 4, T, Q> Result;
+
+ vec<3, T, Q> axis = normalize(v);
+
+ Result[0][0] = c + (static_cast<T>(1) - c) * axis.x * axis.x;
+ Result[0][1] = (static_cast<T>(1) - c) * axis.x * axis.y + s * axis.z;
+ Result[0][2] = (static_cast<T>(1) - c) * axis.x * axis.z - s * axis.y;
+ Result[0][3] = static_cast<T>(0);
+
+ Result[1][0] = (static_cast<T>(1) - c) * axis.y * axis.x - s * axis.z;
+ Result[1][1] = c + (static_cast<T>(1) - c) * axis.y * axis.y;
+ Result[1][2] = (static_cast<T>(1) - c) * axis.y * axis.z + s * axis.x;
+ Result[1][3] = static_cast<T>(0);
+
+ Result[2][0] = (static_cast<T>(1) - c) * axis.z * axis.x + s * axis.y;
+ Result[2][1] = (static_cast<T>(1) - c) * axis.z * axis.y - s * axis.x;
+ Result[2][2] = c + (static_cast<T>(1) - c) * axis.z * axis.z;
+ Result[2][3] = static_cast<T>(0);
+
+ Result[3] = vec<4, T, Q>(0, 0, 0, 1);
+ return m * Result;
+ }
+
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER mat<4, 4, T, Q> scale(mat<4, 4, T, Q> const& m, vec<3, T, Q> const& v)
+ {
+ mat<4, 4, T, Q> Result;
+ Result[0] = m[0] * v[0];
+ Result[1] = m[1] * v[1];
+ Result[2] = m[2] * v[2];
+ Result[3] = m[3];
+ return Result;
+ }
+
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER mat<4, 4, T, Q> scale_slow(mat<4, 4, T, Q> const& m, vec<3, T, Q> const& v)
+ {
+ mat<4, 4, T, Q> Result(T(1));
+ Result[0][0] = v.x;
+ Result[1][1] = v.y;
+ Result[2][2] = v.z;
+ return m * Result;
+ }
+
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER mat<4, 4, T, Q> lookAtRH(vec<3, T, Q> const& eye, vec<3, T, Q> const& center, vec<3, T, Q> const& up)
+ {
+ vec<3, T, Q> const f(normalize(center - eye));
+ vec<3, T, Q> const s(normalize(cross(f, up)));
+ vec<3, T, Q> const u(cross(s, f));
+
+ mat<4, 4, T, Q> Result(1);
+ Result[0][0] = s.x;
+ Result[1][0] = s.y;
+ Result[2][0] = s.z;
+ Result[0][1] = u.x;
+ Result[1][1] = u.y;
+ Result[2][1] = u.z;
+ Result[0][2] =-f.x;
+ Result[1][2] =-f.y;
+ Result[2][2] =-f.z;
+ Result[3][0] =-dot(s, eye);
+ Result[3][1] =-dot(u, eye);
+ Result[3][2] = dot(f, eye);
+ return Result;
+ }
+
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER mat<4, 4, T, Q> lookAtLH(vec<3, T, Q> const& eye, vec<3, T, Q> const& center, vec<3, T, Q> const& up)
+ {
+ vec<3, T, Q> const f(normalize(center - eye));
+ vec<3, T, Q> const s(normalize(cross(up, f)));
+ vec<3, T, Q> const u(cross(f, s));
+
+ mat<4, 4, T, Q> Result(1);
+ Result[0][0] = s.x;
+ Result[1][0] = s.y;
+ Result[2][0] = s.z;
+ Result[0][1] = u.x;
+ Result[1][1] = u.y;
+ Result[2][1] = u.z;
+ Result[0][2] = f.x;
+ Result[1][2] = f.y;
+ Result[2][2] = f.z;
+ Result[3][0] = -dot(s, eye);
+ Result[3][1] = -dot(u, eye);
+ Result[3][2] = -dot(f, eye);
+ return Result;
+ }
+
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER mat<4, 4, T, Q> lookAt(vec<3, T, Q> const& eye, vec<3, T, Q> const& center, vec<3, T, Q> const& up)
+ {
+ GLM_IF_CONSTEXPR(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT)
+ return lookAtLH(eye, center, up);
+ else
+ return lookAtRH(eye, center, up);
+ }
+}//namespace glm
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