1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.geometry.euclidean.threed.rotation; 18 19 /** Defines different types of rotation axis sequences. 20 */ 21 public enum AxisSequenceType { 22 23 /** Represents Euler angles, which consist of axis sequences 24 * in the pattern <em>ABA</em>. For example, the sequences {@code ZXZ}, {@code XYX}, etc. 25 * fit this definition. Other types of sequences that do not match this 26 * pattern are often called "Euler angles" in common usage. However, this enum 27 * value is intended to represent only those sequences that match exactly, ie "proper" Euler angles. 28 * @see <a href="https://en.wikipedia.org/wiki/Euler_angles#Proper_Euler_angles">Proper Euler angles</a> 29 */ 30 EULER, 31 32 /** Represents Tait-Bryan angles, which consist of axis sequences 33 * in the pattern <em>ABC</em>. For example, the sequences {@code XYZ}, {@code ZXY}, 34 * etc. fit this definition. Tait-Bryan angles are also called Cardan angles. 35 * @see <a href="https://en.wikipedia.org/wiki/Euler_angles#Tait%E2%80%93Bryan_angles">Tait-Bryan angles</a> 36 */ 37 TAIT_BRYAN 38 }