001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.geometry.euclidean.threed.rotation; 018 019/** Defines different types of rotation axis sequences. 020 */ 021public enum AxisSequenceType { 022 023 /** Represents Euler angles, which consist of axis sequences 024 * in the pattern <em>ABA</em>. For example, the sequences {@code ZXZ}, {@code XYX}, etc. 025 * fit this definition. Other types of sequences that do not match this 026 * pattern are often called "Euler angles" in common usage. However, this enum 027 * value is intended to represent only those sequences that match exactly, ie "proper" Euler angles. 028 * @see <a href="https://en.wikipedia.org/wiki/Euler_angles#Proper_Euler_angles">Proper Euler angles</a> 029 */ 030 EULER, 031 032 /** Represents Tait-Bryan angles, which consist of axis sequences 033 * in the pattern <em>ABC</em>. For example, the sequences {@code XYZ}, {@code ZXY}, 034 * etc. fit this definition. Tait-Bryan angles are also called Cardan angles. 035 * @see <a href="https://en.wikipedia.org/wiki/Euler_angles#Tait%E2%80%93Bryan_angles">Tait-Bryan angles</a> 036 */ 037 TAIT_BRYAN 038}