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|---|---|---|---|
| 1 | // This file is part of Bembel, the higher order C++ boundary element library. | ||
| 2 | // | ||
| 3 | // Copyright (C) 2022 see <http://www.bembel.eu> | ||
| 4 | // | ||
| 5 | // It was written as part of a cooperation of J. Doelz, H. Harbrecht, S. Kurz, | ||
| 6 | // M. Multerer, S. Schoeps, and F. Wolf at Technische Universitaet Darmstadt, | ||
| 7 | // Universitaet Basel, and Universita della Svizzera italiana, Lugano. This | ||
| 8 | // source code is subject to the GNU General Public License version 3 and | ||
| 9 | // provided WITHOUT ANY WARRANTY, see <http://www.bembel.eu> for further | ||
| 10 | // information. | ||
| 11 | |||
| 12 | #ifndef BEMBEL_SRC_DUFFYTRICK_TAU_HPP_ | ||
| 13 | #define BEMBEL_SRC_DUFFYTRICK_TAU_HPP_ | ||
| 14 | |||
| 15 | namespace Bembel { | ||
| 16 | namespace DuffyTrick { | ||
| 17 | /** | ||
| 18 | * \ingroup DuffyTrick | ||
| 19 | * \brief computes rotations for the DuffyTrick. | ||
| 20 | * | ||
| 21 | * \param x x coordinate | ||
| 22 | * \param y y coordinate | ||
| 23 | * \param thecase Edge case denoting how the element needs to be turned. | ||
| 24 | * \return Point in rotated element. | ||
| 25 | */ | ||
| 26 | 59839128 | Eigen::Vector2d tau(double x, double y, int thecase) { | |
| 27 | 59839128 | Eigen::Vector2d retval; | |
| 28 |
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59839128 | switch (thecase) { |
| 29 | 14959782 | case 1: | |
| 30 |
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14959782 | retval << 1 - y, x; |
| 31 | 14959782 | return retval; | |
| 32 | 14959782 | case 2: | |
| 33 |
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14959782 | retval << 1 - x, 1 - y; |
| 34 | 14959782 | return retval; | |
| 35 | 14959782 | case 3: | |
| 36 |
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14959782 | retval << y, 1 - x; |
| 37 | 14959782 | return retval; | |
| 38 | 14959782 | default: | |
| 39 |
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14959782 | retval << x, y; |
| 40 | 14959782 | return retval; | |
| 41 | } | ||
| 42 | } | ||
| 43 | } // namespace DuffyTrick | ||
| 44 | } // namespace Bembel | ||
| 45 | #endif // BEMBEL_SRC_DUFFYTRICK_TAU_HPP_ | ||
| 46 |