# | Line 34 | Line 34 | |
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34 | #define MATH_QUATERNION_HPP | |
35 | ||
36 | #include "math/Vector.hpp" | |
37 | + | #include "math/SquareMatrix.hpp" |
38 | ||
39 | namespace oopse{ | |
40 | ||
# | Line 48 | Line 49 | namespace oopse{ | |
49 | template<typename Real> | |
50 | class Quaternion : public Vector<Real, 4> { | |
51 | public: | |
52 | < | Quaternion(); |
52 | > | Quaternion() : Vector<Real, 4>() {} |
53 | ||
54 | /** Constructs and initializes a Quaternion from w, x, y, z values */ | |
55 | Quaternion(Real w, Real x, Real y, Real z) { | |
# | Line 58 | Line 59 | namespace oopse{ | |
59 | data_[3] = z; | |
60 | } | |
61 | ||
62 | < | /** |
62 | < | * |
63 | < | */ |
62 | > | /** Constructs and initializes a Quaternion from a Vector<Real,4> */ |
63 | Quaternion(const Vector<Real,4>& v) | |
64 | : Vector<Real, 4>(v){ | |
65 | } | |
66 | ||
67 | < | /** */ |
67 | > | /** copy assignment */ |
68 | Quaternion& operator =(const Vector<Real, 4>& v){ | |
69 | if (this == & v) | |
70 | return *this; | |
# | Line 139 | Line 138 | namespace oopse{ | |
138 | } | |
139 | ||
140 | /** | |
141 | + | * Tests if this quaternion is equal to other quaternion |
142 | + | * @return true if equal, otherwise return false |
143 | + | * @param q quaternion to be compared |
144 | + | */ |
145 | + | inline bool operator ==(const Quaternion<Real>& q) { |
146 | + | |
147 | + | for (unsigned int i = 0; i < 4; i ++) { |
148 | + | if (!equal(data_[i], q[i])) { |
149 | + | return false; |
150 | + | } |
151 | + | } |
152 | + | |
153 | + | return true; |
154 | + | } |
155 | + | |
156 | + | /** |
157 | * Returns the inverse of this quaternion | |
158 | * @return inverse | |
159 | * @note since quaternion is a complex number, the inverse of quaternion | |
160 | * q = w + xi + yj+ zk is inv_q = (w -xi - yj - zk)/(|q|^2) | |
161 | */ | |
162 | < | Quaternion<Real> inverse(){ |
162 | > | Quaternion<Real> inverse() { |
163 | Quaternion<Real> q; | |
164 | < | Real d = this->lengthSquared(); |
164 | > | Real d = this->lengthSquare(); |
165 | ||
166 | q.w() = w() / d; | |
167 | q.x() = -x() / d; | |
# | Line 161 | Line 176 | namespace oopse{ | |
176 | * @param q the other quaternion | |
177 | */ | |
178 | void mul(const Quaternion<Real>& q) { | |
179 | + | Quaternion<Real> tmp(*this); |
180 | ||
181 | < | Real a0( (z() - y()) * (q.y() - q.z()) ); |
182 | < | Real a1( (w() + x()) * (q.w() + q.x()) ); |
183 | < | Real a2( (w() - x()) * (q.y() + q.z()) ); |
184 | < | Real a3( (y() + z()) * (q.w() - q.x()) ); |
185 | < | Real b0( -(x() - z()) * (q.x() - q.y()) ); |
170 | < | Real b1( -(x() + z()) * (q.x() + q.y()) ); |
171 | < | Real b2( (w() + y()) * (q.w() - q.z()) ); |
172 | < | Real b3( (w() - y()) * (q.w() + q.z()) ); |
181 | > | data_[0] = (tmp[0]*q[0]) -(tmp[1]*q[1]) - (tmp[2]*q[2]) - (tmp[3]*q[3]); |
182 | > | data_[1] = (tmp[0]*q[1]) + (tmp[1]*q[0]) + (tmp[2]*q[3]) - (tmp[3]*q[2]); |
183 | > | data_[2] = (tmp[0]*q[2]) + (tmp[2]*q[0]) + (tmp[3]*q[1]) - (tmp[1]*q[3]); |
184 | > | data_[3] = (tmp[0]*q[3]) + (tmp[3]*q[0]) + (tmp[1]*q[2]) - (tmp[2]*q[1]); |
185 | > | } |
186 | ||
187 | < | data_[0] = a0 + 0.5*(b0 + b1 + b2 + b3),; |
188 | < | data_[1] = a1 + 0.5*(b0 + b1 - b2 - b3); |
189 | < | data_[2] = a2 + 0.5*(b0 - b1 + b2 - b3), |
190 | < | data_[3] = a3 + 0.5*(b0 - b1 - b2 + b3) ); |
187 | > | void mul(const Real& s) { |
188 | > | data_[0] *= s; |
189 | > | data_[1] *= s; |
190 | > | data_[2] *= s; |
191 | > | data_[3] *= s; |
192 | } | |
193 | ||
180 | – | |
194 | /** Set the value of this quaternion to the division of itself by another quaternion */ | |
195 | < | void div(const Quaternion<Real>& q) { |
195 | > | void div(Quaternion<Real>& q) { |
196 | mul(q.inverse()); | |
197 | } | |
198 | + | |
199 | + | void div(const Real& s) { |
200 | + | data_[0] /= s; |
201 | + | data_[1] /= s; |
202 | + | data_[2] /= s; |
203 | + | data_[3] /= s; |
204 | + | } |
205 | ||
206 | Quaternion<Real>& operator *=(const Quaternion<Real>& q) { | |
207 | mul(q); | |
208 | return *this; | |
209 | } | |
210 | < | |
211 | < | Quaternion<Real>& operator /=(const Quaternion<Real>& q) { |
212 | < | mul(q.inverse()); |
210 | > | |
211 | > | Quaternion<Real>& operator *=(const Real& s) { |
212 | > | mul(s); |
213 | return *this; | |
214 | } | |
215 | ||
216 | + | Quaternion<Real>& operator /=(Quaternion<Real>& q) { |
217 | + | *this *= q.inverse(); |
218 | + | return *this; |
219 | + | } |
220 | + | |
221 | + | Quaternion<Real>& operator /=(const Real& s) { |
222 | + | div(s); |
223 | + | return *this; |
224 | + | } |
225 | /** | |
226 | * Returns the conjugate quaternion of this quaternion | |
227 | * @return the conjugate quaternion of this quaternion | |
# | Line 232 | Line 261 | namespace oopse{ | |
261 | rotMat3(2, 0) = 2.0 * ( x() * z() + w() * y() ); | |
262 | rotMat3(2, 1) = 2.0 * ( y() * z() - w() * x() ); | |
263 | rotMat3(2, 2) = w2 - x2 -y2 +z2; | |
264 | + | |
265 | + | return rotMat3; |
266 | } | |
267 | ||
268 | };//end Quaternion | |
269 | ||
270 | + | |
271 | /** | |
272 | + | * Returns the vaule of scalar multiplication of this quaterion q (q * s). |
273 | + | * @return the vaule of scalar multiplication of this vector |
274 | + | * @param q the source quaternion |
275 | + | * @param s the scalar value |
276 | + | */ |
277 | + | template<typename Real, unsigned int Dim> |
278 | + | Quaternion<Real> operator * ( const Quaternion<Real>& q, Real s) { |
279 | + | Quaternion<Real> result(q); |
280 | + | result.mul(s); |
281 | + | return result; |
282 | + | } |
283 | + | |
284 | + | /** |
285 | + | * Returns the vaule of scalar multiplication of this quaterion q (q * s). |
286 | + | * @return the vaule of scalar multiplication of this vector |
287 | + | * @param s the scalar value |
288 | + | * @param q the source quaternion |
289 | + | */ |
290 | + | template<typename Real, unsigned int Dim> |
291 | + | Quaternion<Real> operator * ( const Real& s, const Quaternion<Real>& q ) { |
292 | + | Quaternion<Real> result(q); |
293 | + | result.mul(s); |
294 | + | return result; |
295 | + | } |
296 | + | |
297 | + | /** |
298 | * Returns the multiplication of two quaternion | |
299 | * @return the multiplication of two quaternion | |
300 | * @param q1 the first quaternion | |
# | Line 256 | Line 314 | namespace oopse{ | |
314 | */ | |
315 | ||
316 | template<typename Real> | |
317 | < | inline Quaternion<Real> operator /(const Quaternion<Real>& q1, const Quaternion<Real>& q2) { |
317 | > | inline Quaternion<Real> operator /( Quaternion<Real>& q1, Quaternion<Real>& q2) { |
318 | return q1 * q2.inverse(); | |
319 | } | |
320 | ||
# | Line 268 | Line 326 | namespace oopse{ | |
326 | * @note for a quaternion q, 1/q = q.inverse() | |
327 | */ | |
328 | template<typename Real> | |
329 | < | Quaternion<Real> operator /(const Real& s, const Quaternion<Real>& q) { |
329 | > | Quaternion<Real> operator /(const Real& s, Quaternion<Real>& q) { |
330 | ||
331 | < | Quaternion<Real> x = q.inv(); |
332 | < | return x * s; |
331 | > | Quaternion<Real> x; |
332 | > | x = q.inverse(); |
333 | > | x *= s; |
334 | > | return x; |
335 | } | |
336 | < | |
336 | > | |
337 | > | template <class T> |
338 | > | inline bool operator==(const Quaternion<T>& lhs, const Quaternion<T>& rhs) { |
339 | > | return equal(lhs[0] ,rhs[0]) && equal(lhs[1] , rhs[1]) && equal(lhs[2], rhs[2]) && equal(lhs[3], rhs[3]); |
340 | > | } |
341 | > | |
342 | typedef Quaternion<double> Quat4d; | |
343 | } | |
344 | #endif //MATH_QUATERNION_HPP |
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