104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
#ifndef NAVLIB_OPERATORS_H_INCLUDED_
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#define NAVLIB_OPERATORS_H_INCLUDED_
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/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (c) 2014-2021 3Dconnexion.
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file navlib_operators.h
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* @brief the operator overloads for variable types used in the 3dconnexion
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* interface.
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*/
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#include <navlib/navlib_types.h>
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// stdlib
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#include <float.h>
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#include <math.h>
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_NAVLIB_BEGIN
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/// <summary>
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/// Compare floating point numbers.
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/// </summary>
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/// <param name="a">First value to compare.</param>
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/// <param name="b">Second value to compare.</param>
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/// <param name="epsilon">Maximum relative error.</param>
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/// <returns></returns>
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/// <remarks>
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/// From https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition.
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/// Copyright Bruce Dawson.
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/// </remarks>
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template <class T> bool equals(T a, T b, T epsilon = static_cast<T>(FLT_EPSILON)) {
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T diff = fabs(a - b);
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if (diff < epsilon) {
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return true;
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}
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a = fabs(a);
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b = fabs(b);
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T largest = (a > b) ? a : b;
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if (diff <= largest * epsilon) {
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return true;
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}
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return false;
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}
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inline bool operator==(const vector_t &lhs, const vector_t &rhs) {
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return (equals(lhs.x, rhs.x) && equals(lhs.y, rhs.y) && equals(lhs.z, rhs.z));
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}
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inline bool operator!=(const vector_t &lhs, const vector_t &rhs) {
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return !(lhs == rhs);
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}
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inline bool operator==(const point_t &lhs, const point_t &rhs) {
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return (equals(lhs.x, rhs.x) && equals(lhs.y, rhs.y) && equals(lhs.z, rhs.z));
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}
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inline bool operator!=(const point_t &lhs, const point_t &rhs) {
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return !(lhs == rhs);
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}
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inline bool operator==(const box_t &lhs, const box_t &rhs) {
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return lhs.min == rhs.min && lhs.max == rhs.max;
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}
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inline bool operator!=(const box_t &lhs, const box_t &rhs) {
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return !(lhs == rhs);
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}
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inline bool operator==(const matrix_t &lhs, const matrix_t &rhs) {
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for (size_t i = 0; i < sizeof(rhs.m) / sizeof(rhs.m[0]); ++i) {
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if (!equals(lhs.m[i], rhs.m[i])) {
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return false;
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}
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}
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return true;
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}
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inline bool operator!=(const matrix_t &lhs, const matrix_t &rhs) {
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return !(lhs == rhs);
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}
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inline nlOptions_t operator|(nlOptions_t lhs, nlOptions_t rhs) {
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return static_cast<nlOptions_t>(static_cast<int>(lhs) | static_cast<int>(rhs));
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}
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_NAVLIB_END
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#endif /* NAVLIB_OPERATORS_H_INCLUDED_ */ |