1 /* 2 * Copyright (c) 2014, The University of Oxford 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 1. Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright notice, 10 * this list of conditions and the following disclaimer in the documentation 11 * and/or other materials provided with the distribution. 12 * 3. Neither the name of the University of Oxford nor the names of its 13 * contributors may be used to endorse or promote products derived from this 14 * software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef OSKAR_ELLIPSE_RADIUS_H_ 30 #define OSKAR_ELLIPSE_RADIUS_H_ 31 32 /** 33 * @file oskar_ellipse_radius.h 34 */ 35 36 #include <oskar_global.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /** 43 * @details 44 * Return the radius at a specified point on an ellipse. 45 * 46 * @param[in] maj_axis Major axis of ellipse. 47 * @param[in] min_axis Minor axis of ellipse. 48 * @param[in] pa_ellipse_rad Position angle of ellipse, in radians. 49 * @param[in] pa_point_rad Position angle of point, in radians. 50 * 51 * @return The radius of the ellipse at the given point. 52 */ 53 OSKAR_EXPORT 54 double oskar_ellipse_radius(double maj_axis, double min_axis, 55 double pa_ellipse_rad, double pa_point_rad); 56 57 #ifdef __cplusplus 58 } 59 #endif 60 61 #endif /* OSKAR_ELLIPSE_RADIUS_H_ */ 62