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feature 297: add ParametrizedLine::intersectionPoint() and intersectionParam()

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-> intersection() is deprecated
This commit is contained in:
Andy Somerville 2011-12-10 11:58:38 +01:00
parent 36457178f9
commit c06ae325a4
1 changed files with 44 additions and 2 deletions
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46
Eigen/src/Geometry/ParametrizedLine.h
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@ -106,9 +106,22 @@ public:
VectorType projection(const VectorType& p) const VectorType projection(const VectorType& p) const
{ return origin() + direction().dot(p-origin()) * direction(); } { return origin() + direction().dot(p-origin()) * direction(); }
/** \returns the point at parameter t along the line */
VectorType intersectionPoint( Scalar t ) const;
/** \returns parameter t of the intersection of the line with hyperplane */
template <int OtherOptions>
Scalar intersectionParameter(const Hyperplane<_Scalar, _AmbientDim, OtherOptions>& hyperplane) const;
/** \returns parameter t of the intersection of the line with hyperplane. (maintained for API compatablity) */
template <int OtherOptions> template <int OtherOptions>
Scalar intersection(const Hyperplane<_Scalar, _AmbientDim, OtherOptions>& hyperplane) const; Scalar intersection(const Hyperplane<_Scalar, _AmbientDim, OtherOptions>& hyperplane) const;
/** \returns the intersection point of the line with hyperplane */
template <int OtherOptions>
VectorType intersectionPoint(const Hyperplane<_Scalar, _AmbientDim, OtherOptions>& hyperplane) const;
/** \returns \c *this with scalar type casted to \a NewScalarType /** \returns \c *this with scalar type casted to \a NewScalarType
* *
* Note that if \a NewScalarType is equal to the current scalar type of \c *this * Note that if \a NewScalarType is equal to the current scalar type of \c *this
@ -155,14 +168,43 @@ inline ParametrizedLine<_Scalar, _AmbientDim,_Options>::ParametrizedLine(const H
origin() = -hyperplane.normal()*hyperplane.offset(); origin() = -hyperplane.normal()*hyperplane.offset();
} }
/** \returns the point at t along this line
*/
template <typename _Scalar, int _AmbientDim, int _Options>
inline typename ParametrizedLine<_Scalar, _AmbientDim,_Options>::VectorType
ParametrizedLine<_Scalar, _AmbientDim,_Options>::intersectionPoint( _Scalar t ) const
{
return origin() + (direction()*t);
}
/** \returns the parameter value of the intersection between \c *this and the given hyperplane
*/
template <typename _Scalar, int _AmbientDim, int _Options>
template <int OtherOptions>
inline _Scalar ParametrizedLine<_Scalar, _AmbientDim,_Options>::intersectionParameter(const Hyperplane<_Scalar, _AmbientDim, OtherOptions>& hyperplane) const
{
return -(hyperplane.offset()+hyperplane.normal().dot(origin()))
/ hyperplane.normal().dot(direction());
}
/** \returns the parameter value of the intersection between \c *this and the given hyperplane /** \returns the parameter value of the intersection between \c *this and the given hyperplane
*/ */
template <typename _Scalar, int _AmbientDim, int _Options> template <typename _Scalar, int _AmbientDim, int _Options>
template <int OtherOptions> template <int OtherOptions>
inline _Scalar ParametrizedLine<_Scalar, _AmbientDim,_Options>::intersection(const Hyperplane<_Scalar, _AmbientDim, OtherOptions>& hyperplane) const inline _Scalar ParametrizedLine<_Scalar, _AmbientDim,_Options>::intersection(const Hyperplane<_Scalar, _AmbientDim, OtherOptions>& hyperplane) const
{ {
return -(hyperplane.offset()+hyperplane.normal().dot(origin())) return intersectionParameter(hyperplane);
/ hyperplane.normal().dot(direction()); }
/** \returns the point of the intersection between \c *this and the given hyperplane
*/
template <typename _Scalar, int _AmbientDim, int _Options>
template <int OtherOptions>
inline typename ParametrizedLine<_Scalar, _AmbientDim,_Options>::VectorType
ParametrizedLine<_Scalar, _AmbientDim,_Options>::intersectionPoint(const Hyperplane<_Scalar, _AmbientDim, OtherOptions>& hyperplane) const
{
return intersectionPoint(intersectionParameter(hyperplane));
} }
#endif // EIGEN_PARAMETRIZEDLINE_H #endif // EIGEN_PARAMETRIZEDLINE_H