# QuantLib_SphereCylinderOptimizer man page

SphereCylinderOptimizer

## Synopsis

`#include <ql/math/optimization/spherecylinder.hpp>`

### Public Member Functions

**SphereCylinderOptimizer** (**Real** r, **Real** s, **Real** alpha, **Real** z1, **Real** z2, **Real** z3, **Real** zweight=1.0)

bool **isIntersectionNonEmpty** () const

void **findClosest** (**Size** maxIterations, **Real** tolerance, **Real** &y1, **Real** &y2, **Real** &y3) const

bool **findByProjection** (**Real** &y1, **Real** &y2, **Real** &y3) const

## Detailed Description

- we are in r^3 sphere centred at O radius r
- vertical cylinder centred at (alpha,0) radius s
- Z some point in R3
- find point on intersection that is closest to Z

the intersection may be empty!

## Author

Generated automatically by Doxygen for QuantLib from the source code.

## Referenced By

findByProjection(3), findClosest(3), isIntersectionNonEmpty(3) and SphereCylinderOptimizer(3) are aliases of QuantLib_SphereCylinderOptimizer(3).

Fri Feb 10 2017 Version 1.9.1 QuantLib