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Diffstat (limited to 'src/lib/mathlib/math/Dcm.cpp')
| -rw-r--r-- | src/lib/mathlib/math/Dcm.cpp | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/lib/mathlib/math/Dcm.cpp b/src/lib/mathlib/math/Dcm.cpp new file mode 100644 index 000000000..f509f7081 --- /dev/null +++ b/src/lib/mathlib/math/Dcm.cpp @@ -0,0 +1,174 @@ +/**************************************************************************** + * + * Copyright (C) 2012 PX4 Development Team. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name PX4 nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/** + * @file Dcm.cpp + * + * math direction cosine matrix + */ + +#include <mathlib/math/test/test.hpp> + +#include "Dcm.hpp" +#include "Quaternion.hpp" +#include "EulerAngles.hpp" +#include "Vector3.hpp" + +namespace math +{ + +Dcm::Dcm() : + Matrix(Matrix::identity(3)) +{ +} + +Dcm::Dcm(float c00, float c01, float c02, + float c10, float c11, float c12, + float c20, float c21, float c22) : + Matrix(3, 3) +{ + Dcm &dcm = *this; + dcm(0, 0) = c00; + dcm(0, 1) = c01; + dcm(0, 2) = c02; + dcm(1, 0) = c10; + dcm(1, 1) = c11; + dcm(1, 2) = c12; + dcm(2, 0) = c20; + dcm(2, 1) = c21; + dcm(2, 2) = c22; +} + +Dcm::Dcm(const float data[3][3]) : + Matrix(3, 3) +{ + Dcm &dcm = *this; + /* set rotation matrix */ + for (int i = 0; i < 3; i++) for (int j = 0; j < 3; j++) + dcm(i, j) = data[i][j]; +} + +Dcm::Dcm(const float *data) : + Matrix(3, 3, data) +{ +} + +Dcm::Dcm(const Quaternion &q) : + Matrix(3, 3) +{ + Dcm &dcm = *this; + double a = q.getA(); + double b = q.getB(); + double c = q.getC(); + double d = q.getD(); + double aSq = a * a; + double bSq = b * b; + double cSq = c * c; + double dSq = d * d; + dcm(0, 0) = aSq + bSq - cSq - dSq; + dcm(0, 1) = 2.0 * (b * c - a * d); + dcm(0, 2) = 2.0 * (a * c + b * d); + dcm(1, 0) = 2.0 * (b * c + a * d); + dcm(1, 1) = aSq - bSq + cSq - dSq; + dcm(1, 2) = 2.0 * (c * d - a * b); + dcm(2, 0) = 2.0 * (b * d - a * c); + dcm(2, 1) = 2.0 * (a * b + c * d); + dcm(2, 2) = aSq - bSq - cSq + dSq; +} + +Dcm::Dcm(const EulerAngles &euler) : + Matrix(3, 3) +{ + Dcm &dcm = *this; + double cosPhi = cos(euler.getPhi()); + double sinPhi = sin(euler.getPhi()); + double cosThe = cos(euler.getTheta()); + double sinThe = sin(euler.getTheta()); + double cosPsi = cos(euler.getPsi()); + double sinPsi = sin(euler.getPsi()); + + dcm(0, 0) = cosThe * cosPsi; + dcm(0, 1) = -cosPhi * sinPsi + sinPhi * sinThe * cosPsi; + dcm(0, 2) = sinPhi * sinPsi + cosPhi * sinThe * cosPsi; + + dcm(1, 0) = cosThe * sinPsi; + dcm(1, 1) = cosPhi * cosPsi + sinPhi * sinThe * sinPsi; + dcm(1, 2) = -sinPhi * cosPsi + cosPhi * sinThe * sinPsi; + + dcm(2, 0) = -sinThe; + dcm(2, 1) = sinPhi * cosThe; + dcm(2, 2) = cosPhi * cosThe; +} + +Dcm::Dcm(const Dcm &right) : + Matrix(right) +{ +} + +Dcm::~Dcm() +{ +} + +int __EXPORT dcmTest() +{ + printf("Test DCM\t\t: "); + // default ctor + ASSERT(matrixEqual(Dcm(), + Matrix::identity(3))); + // quaternion ctor + ASSERT(matrixEqual( + Dcm(Quaternion(0.983347f, 0.034271f, 0.106021f, 0.143572f)), + Dcm(0.9362934f, -0.2750958f, 0.2183507f, + 0.2896295f, 0.9564251f, -0.0369570f, + -0.1986693f, 0.0978434f, 0.9751703f))); + // euler angle ctor + ASSERT(matrixEqual( + Dcm(EulerAngles(0.1f, 0.2f, 0.3f)), + Dcm(0.9362934f, -0.2750958f, 0.2183507f, + 0.2896295f, 0.9564251f, -0.0369570f, + -0.1986693f, 0.0978434f, 0.9751703f))); + // rotations + Vector3 vB(1, 2, 3); + ASSERT(vectorEqual(Vector3(-2.0f, 1.0f, 3.0f), + Dcm(EulerAngles(0.0f, 0.0f, M_PI_2_F))*vB)); + ASSERT(vectorEqual(Vector3(3.0f, 2.0f, -1.0f), + Dcm(EulerAngles(0.0f, M_PI_2_F, 0.0f))*vB)); + ASSERT(vectorEqual(Vector3(1.0f, -3.0f, 2.0f), + Dcm(EulerAngles(M_PI_2_F, 0.0f, 0.0f))*vB)); + ASSERT(vectorEqual(Vector3(3.0f, 2.0f, -1.0f), + Dcm(EulerAngles( + M_PI_2_F, M_PI_2_F, M_PI_2_F))*vB)); + printf("PASS\n"); + return 0; +} +} // namespace math |