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authorStanislaw Halik <sthalik@misaki.pl>2014-10-05 01:22:11 +0200
committerStanislaw Halik <sthalik@misaki.pl>2014-10-05 01:22:11 +0200
commitcfffa29e29db6b2234c7f534b1ebcd612b7f4914 (patch)
tree35126a8dfc5304efaa4617efbc92e31617e4a030 /facetracknoir/rotation.h
parent97bd173ee4b6f30c12ca590e213b21bbc83f8617 (diff)
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Diffstat (limited to 'facetracknoir/rotation.h')
-rw-r--r--facetracknoir/rotation.h58
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diff --git a/facetracknoir/rotation.h b/facetracknoir/rotation.h
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--- a/facetracknoir/rotation.h
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-/* Copyright (c) 2012 Patrick Ruoff
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- */
-
-#pragma once
-#include <cmath>
-
-class Quat {
-
-public:
- Quat() : a(1.0),b(0.0),c(0.0),d(0.0) {}
- Quat(double yaw, double pitch, double roll) { fromEuler(yaw, pitch, roll); }
- Quat(double a, double b, double c, double d) : a(a),b(b),c(c),d(d) {}
-
- Quat inv(){
- return Quat(a,-b,-c, -d);
- }
-
- // conversions
- // see http://en.wikipedia.org/wiki/Conversion_between_quaternions_and_Euler_angles
- void fromEuler(double yaw, double pitch, double roll)
- {
-
- double sin_phi = sin(roll/2.0);
- double cos_phi = cos(roll/2.0);
- double sin_the = sin(pitch/2.0);
- double cos_the = cos(pitch/2.0);
- double sin_psi = sin(yaw/2.0);
- double cos_psi = cos(yaw/2.0);
-
- a = cos_phi*cos_the*cos_psi + sin_phi*sin_the*sin_psi;
- b = sin_phi*cos_the*cos_psi - cos_phi*sin_the*sin_psi;
- c = cos_phi*sin_the*cos_psi + sin_phi*cos_the*sin_psi;
- d = cos_phi*cos_the*sin_psi - sin_phi*sin_the*cos_psi;
- }
-
- void toEuler(double& yaw, double& pitch, double& roll) const
- {
- roll = atan2(2.0*(a*b + c*d), 1.0 - 2.0*(b*b + c*c));
- pitch = asin(2.0*(a*c - b*d));
- yaw = atan2(2.0*(a*d + b*c), 1.0 - 2.0*(c*c + d*d));
- }
-
- const Quat operator*(const Quat& B) const
- {
- const Quat& A = *this;
- return Quat(A.a*B.a - A.b*B.b - A.c*B.c - A.d*B.d, // quaternion multiplication
- A.a*B.b + A.b*B.a + A.c*B.d - A.d*B.c,
- A.a*B.c - A.b*B.d + A.c*B.a + A.d*B.b,
- A.a*B.d + A.b*B.c - A.c*B.b + A.d*B.a);
- }
-
-private:
- double a,b,c,d; // quaternion coefficients
-};