85 lines
		
	
	
		
			2.5 KiB
		
	
	
	
		
			C++
		
	
	
			
		
		
	
	
			85 lines
		
	
	
		
			2.5 KiB
		
	
	
	
		
			C++
		
	
	
| /*
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|  * Rot2.cpp
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|  *
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|  *  Created on: Dec 9, 2009
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|  *      Author: Frank Dellaert
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|  */
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| 
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| #include "Rot2.h"
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| 
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| using namespace std;
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| 
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| namespace gtsam {
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| 
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|   /* ************************************************************************* */
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|   void Rot2::print(const string& s) const {
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|     cout << s << ":" << theta() << endl;
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|   }
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| 
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|   /* ************************************************************************* */
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|   bool Rot2::equals(const Rot2& R, double tol) const {
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|     return fabs(c_ - R.c_) <= tol && fabs(s_ - R.s_) <= tol;
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|   }
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| 
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|   /* ************************************************************************* */
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|   Matrix Rot2::matrix() const {
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|     return Matrix_(2, 2, c_, -s_, s_, c_);
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|   }
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| 
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|   /* ************************************************************************* */
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|   Matrix Rot2::transpose() const {
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|     return Matrix_(2, 2, c_, s_, -s_, c_);
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|   }
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| 
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|   /* ************************************************************************* */
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|   Matrix Rot2::negtranspose() const {
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|     return Matrix_(2, 2, -c_, -s_, s_, -c_);
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|   }
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| 
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|   /* ************************************************************************* */
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|   Point2 Rot2::unrotate(const Point2& p) const {
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|     return Point2(
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|         c_ * p.x() + s_ * p.y(),
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|         -s_ * p.x() + c_ * p.y()
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|     );
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|   }
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| 
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|   /* ************************************************************************* */
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|   Point2 rotate(const Rot2& R, const Point2& p) {
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|     return Point2(
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|         R.c() * p.x() - R.s() * p.y(),
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|         R.s() * p.x() + R.c() * p.y());
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|   }
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| 
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|   /* ************************************************************************* */
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|   // see libraries/caml/geometry/math.ml
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|   Matrix Drotate1(const Rot2& R, const Point2& p) {
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|     Point2 q = R*p;
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|     return Matrix_(2, 1, -q.y(), q.x());
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|   }
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| 
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|   /* ************************************************************************* */
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|   Matrix Drotate2(const Rot2& R) {
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|     return R.matrix();
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|   }
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| 
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|   /* ************************************************************************* */
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|   Point2 unrotate(const Rot2& R, const Point2& p) {
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|     return R.unrotate(p);
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|   }
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| 
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|   /* ************************************************************************* */
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|   /** see libraries/caml/geometry/math.lyx, derivative of unrotate              */
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|   /* ************************************************************************* */
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|   Matrix Dunrotate1(const Rot2 & R, const Point2 & p) {
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|     Point2 q = R.unrotate(p);
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|     return Matrix_(2, 1, q.y(), -q.x());
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|   }
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| 
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|   /* ************************************************************************* */
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|   Matrix Dunrotate2(const Rot2 & R) {
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|     return R.transpose();
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|   }
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| 
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| } // gtsam
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