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eigen/test/geometry.cpp
Gael Guennebaud e5c50afed6 * Quaternion: added dot product and angularDistance functions. The latter is 
based on the former.
* opengl_demo: makes IcoSphere better (vertices are instanciated only once) and
               removed the generation of a big geometry for the fancy spheres...
2008-09-11 11:19:34 +00:00

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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra. Eigen itself is part of the KDE project.
//
// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
//
// Eigen is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// Alternatively, you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License and a copy of the GNU General Public License along with
// Eigen. If not, see <http://www.gnu.org/licenses/>.
#include "main.h"
#include <Eigen/Geometry>
#include <Eigen/LU>
#include <Eigen/QR>
template<typename Scalar> void geometry(void)
{
/* this test covers the following files:
Cross.h Quaternion.h, Transform.cpp
*/
typedef Matrix<Scalar,2,2> Matrix2;
typedef Matrix<Scalar,3,3> Matrix3;
typedef Matrix<Scalar,4,4> Matrix4;
typedef Matrix<Scalar,2,1> Vector2;
typedef Matrix<Scalar,3,1> Vector3;
typedef Matrix<Scalar,4,1> Vector4;
typedef Quaternion<Scalar> Quaternion;
typedef AngleAxis<Scalar> AngleAxis;
typedef Transform<Scalar,2> Transform2;
typedef Transform<Scalar,3> Transform3;
typedef Scaling<Scalar,2> Scaling2;
typedef Scaling<Scalar,3> Scaling3;
typedef Translation<Scalar,2> Translation2;
typedef Translation<Scalar,3> Translation3;
Scalar largeEps = test_precision<Scalar>();
if (ei_is_same_type<Scalar,float>::ret)
largeEps = 1e-3f;
Quaternion q1, q2;
Vector3 v0 = Vector3::Random(),
v1 = Vector3::Random(),
v2 = Vector3::Random();
Vector2 u0 = Vector2::Random();
Matrix3 matrot1;
Scalar a = ei_random<Scalar>(-M_PI, M_PI);
// cross product
VERIFY_IS_MUCH_SMALLER_THAN(v1.cross(v2).dot(v1), Scalar(1));
Matrix3 m;
m << v0.normalized(),
(v0.cross(v1)).normalized(),
(v0.cross(v1).cross(v0)).normalized();
VERIFY(m.isUnitary());
// unitOrthogonal
VERIFY_IS_MUCH_SMALLER_THAN(u0.unitOrthogonal().dot(u0), Scalar(1));
VERIFY_IS_MUCH_SMALLER_THAN(v0.unitOrthogonal().dot(v0), Scalar(1));
VERIFY_IS_APPROX(u0.unitOrthogonal().norm(), Scalar(1));
VERIFY_IS_APPROX(v0.unitOrthogonal().norm(), Scalar(1));
VERIFY_IS_APPROX(v0, AngleAxis(a, v0.normalized()) * v0);
VERIFY_IS_APPROX(-v0, AngleAxis(M_PI, v0.unitOrthogonal()) * v0);
VERIFY_IS_APPROX(ei_cos(a)*v0.norm2(), v0.dot(AngleAxis(a, v0.unitOrthogonal()) * v0));
m = AngleAxis(a, v0.normalized()).toRotationMatrix().adjoint();
VERIFY_IS_APPROX(Matrix3::Identity(), m * AngleAxis(a, v0.normalized()));
VERIFY_IS_APPROX(Matrix3::Identity(), AngleAxis(a, v0.normalized()) * m);
q1 = AngleAxis(a, v0.normalized());
q2 = AngleAxis(a, v1.normalized());
// angular distance
Scalar refangle = ei_abs(AngleAxis(q1.inverse()*q2).angle());
if (refangle>M_PI)
refangle = 2.*M_PI - refangle;
VERIFY(ei_isApprox(q1.angularDistance(q2), refangle, largeEps));
// rotation matrix conversion
VERIFY_IS_APPROX(q1 * v2, q1.toRotationMatrix() * v2);
VERIFY_IS_APPROX(q1 * q2 * v2,
q1.toRotationMatrix() * q2.toRotationMatrix() * v2);
VERIFY( !(q2 * q1 * v2).isApprox(
q1.toRotationMatrix() * q2.toRotationMatrix() * v2));
q2 = q1.toRotationMatrix();
VERIFY_IS_APPROX(q1*v1,q2*v1);
matrot1 = AngleAxis(0.1, Vector3::UnitX())
* AngleAxis(0.2, Vector3::UnitY())
* AngleAxis(0.3, Vector3::UnitZ());
VERIFY_IS_APPROX(matrot1 * v1,
AngleAxis(0.1, Vector3(1,0,0)).toRotationMatrix()
* (AngleAxis(0.2, Vector3(0,1,0)).toRotationMatrix()
* (AngleAxis(0.3, Vector3(0,0,1)).toRotationMatrix() * v1)));
// angle-axis conversion
AngleAxis aa = q1;
VERIFY_IS_APPROX(q1 * v1, Quaternion(aa) * v1);
VERIFY_IS_NOT_APPROX(q1 * v1, Quaternion(AngleAxis(aa.angle()*2,aa.axis())) * v1);
// from two vector creation
VERIFY_IS_APPROX(v2.normalized(),(q2.setFromTwoVectors(v1,v2)*v1).normalized());
VERIFY_IS_APPROX(v2.normalized(),(q2.setFromTwoVectors(v1,v2)*v1).normalized());
// inverse and conjugate
VERIFY_IS_APPROX(q1 * (q1.inverse() * v1), v1);
VERIFY_IS_APPROX(q1 * (q1.conjugate() * v1), v1);
// AngleAxis
VERIFY_IS_APPROX(AngleAxis(a,v1.normalized()).toRotationMatrix(),
Quaternion(AngleAxis(a,v1.normalized())).toRotationMatrix());
AngleAxis aa1;
m = q1.toRotationMatrix();
aa1 = m;
VERIFY_IS_APPROX(AngleAxis(m).toRotationMatrix(),
Quaternion(m).toRotationMatrix());
// Transform
// TODO complete the tests !
a = 0;
while (ei_abs(a)<0.1)
a = ei_random<Scalar>(-0.4*M_PI, 0.4*M_PI);
q1 = AngleAxis(a, v0.normalized());
Transform3 t0, t1, t2;
t0.setIdentity();
t0.linear() = q1.toRotationMatrix();
t1.setIdentity();
t1.linear() = q1.toRotationMatrix();
v0 << 50, 2, 1;//= ei_random_matrix<Vector3>().cwiseProduct(Vector3(10,2,0.5));
t0.scale(v0);
t1.prescale(v0);
VERIFY_IS_APPROX( (t0 * Vector3(1,0,0)).norm(), v0.x());
VERIFY(!ei_isApprox((t1 * Vector3(1,0,0)).norm(), v0.x()));
t0.setIdentity();
t1.setIdentity();
v1 << 1, 2, 3;
t0.linear() = q1.toRotationMatrix();
t0.pretranslate(v0);
t0.scale(v1);
t1.linear() = q1.conjugate().toRotationMatrix();
t1.prescale(v1.cwise().inverse());
t1.translate(-v0);
VERIFY((t0.matrix() * t1.matrix()).isIdentity(test_precision<Scalar>()));
t1.fromPositionOrientationScale(v0, q1, v1);
VERIFY_IS_APPROX(t1.matrix(), t0.matrix());
VERIFY_IS_APPROX(t1*v1, t0*v1);
t0.setIdentity(); t0.scale(v0).rotate(q1.toRotationMatrix());
t1.setIdentity(); t1.scale(v0).rotate(q1);
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
t0.setIdentity(); t0.scale(v0).rotate(AngleAxis(q1));
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
VERIFY_IS_APPROX(t0.scale(a).matrix(), t1.scale(Vector3::Constant(a)).matrix());
VERIFY_IS_APPROX(t0.prescale(a).matrix(), t1.prescale(Vector3::Constant(a)).matrix());
// 2D transformation
Transform2 t20, t21;
Vector2 v20 = Vector2::Random();
Vector2 v21 = Vector2::Random();
for (int k=0; k<2; ++k)
if (ei_abs(v21[k])<1e-3) v21[k] = 1e-3;
t21.setIdentity();
t21.linear() = Rotation2D<Scalar>(a).toRotationMatrix();
VERIFY_IS_APPROX(t20.fromPositionOrientationScale(v20,a,v21).matrix(),
t21.pretranslate(v20).scale(v21).matrix());
t21.setIdentity();
t21.linear() = Rotation2D<Scalar>(-a).toRotationMatrix();
VERIFY( (t20.fromPositionOrientationScale(v20,a,v21)
* (t21.prescale(v21.cwise().inverse()).translate(-v20))).isIdentity(test_precision<Scalar>()) );
// Transform - new API
// 3D
t0.setIdentity();
t0.rotate(q1).scale(v0).translate(v0);
// mat * scaling and mat * translation
t1 = (Matrix3(q1) * Scaling3(v0)) * Translation3(v0);
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// mat * transformation and scaling * translation
t1 = Matrix3(q1) * (Scaling3(v0) * Translation3(v0));
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
t0.setIdentity();
t0.prerotate(q1).prescale(v0).pretranslate(v0);
// translation * scaling and transformation * mat
t1 = (Translation3(v0) * Scaling3(v0)) * Matrix3(q1);
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// scaling * mat and translation * mat
t1 = Translation3(v0) * (Scaling3(v0) * Matrix3(q1));
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
t0.setIdentity();
t0.scale(v0).translate(v0).rotate(q1);
// translation * mat and scaling * transformation
t1 = Scaling3(v0) * (Translation3(v0) * Matrix3(q1));
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// transformation * scaling
t0.scale(v0);
t1 = t1 * Scaling3(v0);
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// transformation * translation
t0.translate(v0);
t1 = t1 * Translation3(v0);
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// translation * transformation
t0.pretranslate(v0);
t1 = Translation3(v0) * t1;
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// transform * quaternion
t0.rotate(q1);
t1 = t1 * q1;
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// translation * quaternion
t0.translate(v1).rotate(q1);
t1 = t1 * (Translation3(v1) * q1);
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// scaling * quaternion
t0.scale(v1).rotate(q1);
t1 = t1 * (Scaling3(v1) * q1);
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// quaternion * transform
t0.prerotate(q1);
t1 = q1 * t1;
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// quaternion * translation
t0.rotate(q1).translate(v1);
t1 = t1 * (q1 * Translation3(v1));
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// quaternion * scaling
t0.rotate(q1).scale(v1);
t1 = t1 * (q1 * Scaling3(v1));
VERIFY_IS_APPROX(t0.matrix(), t1.matrix());
// translation * vector
t0.setIdentity();
t0.translate(v0);
VERIFY_IS_APPROX(t0 * v1, Translation3(v0) * v1);
// scaling * vector
t0.setIdentity();
t0.scale(v0);
VERIFY_IS_APPROX(t0 * v1, Scaling3(v0) * v1);
// test transform inversion
t0.setIdentity();
t0.translate(v0);
t0.linear().setRandom();
VERIFY_IS_APPROX(t0.inverse(Affine), t0.matrix().inverse());
t0.setIdentity();
t0.translate(v0).rotate(q1);
VERIFY_IS_APPROX(t0.inverse(Isometry), t0.matrix().inverse());
// test extract rotation
t0.setIdentity();
t0.translate(v0).rotate(q1).scale(v1);
VERIFY_IS_APPROX(t0.extractRotation(Affine) * v1, Matrix3(q1) * v1);
}
void test_geometry()
{
for(int i = 0; i < g_repeat; i++) {
CALL_SUBTEST( geometry<float>() );
CALL_SUBTEST( geometry<double>() );
}
}
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