001/**
002 * Copyright (c) 2011, The University of Southampton and the individual contributors.
003 * All rights reserved.
004 *
005 * Redistribution and use in source and binary forms, with or without modification,
006 * are permitted provided that the following conditions are met:
007 *
008 *   *  Redistributions of source code must retain the above copyright notice,
009 *      this list of conditions and the following disclaimer.
010 *
011 *   *  Redistributions in binary form must reproduce the above copyright notice,
012 *      this list of conditions and the following disclaimer in the documentation
013 *      and/or other materials provided with the distribution.
014 *
015 *   *  Neither the name of the University of Southampton nor the names of its
016 *      contributors may be used to endorse or promote products derived from this
017 *      software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
020 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
021 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
022 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
023 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
026 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package org.openimaj.math.geometry.shape.util.polygon;
031
032/**
033 * Edge intersection classes
034 */
035public class VertexType
036{
037        /** Empty non-intersection */
038        public static final int NUL = 0;
039
040        /** External maximum */
041        public static final int EMX = 1;
042
043        /** External left intermediate */
044        public static final int ELI = 2;
045
046        /** Top edge */
047        public static final int TED = 3;
048
049        /** External right intermediate */
050        public static final int ERI = 4;
051
052        /** Right edge */
053        public static final int RED = 5;
054
055        /** Internal maximum and minimum */
056        public static final int IMM = 6;
057
058        /** Internal minimum */
059        public static final int IMN = 7;
060
061        /** External minimum */
062        public static final int EMN = 8;
063
064        /** External maximum and minimum */
065        public static final int EMM = 9;
066
067        /** Left edge */
068        public static final int LED = 10;
069
070        /** Internal left intermediate */
071        public static final int ILI = 11;
072
073        /** Bottom edge */
074        public static final int BED = 12;
075
076        /** Internal right intermediate */
077        public static final int IRI = 13;
078
079        /** Internal maximum */
080        public static final int IMX = 14;
081
082        /** Full non-intersection */
083        public static final int FUL = 15;
084
085        /**
086         * @param tr
087         * @param tl
088         * @param br
089         * @param bl
090         * @return type
091         */
092        public static int getType( int tr, int tl, int br, int bl )
093        {
094                return tr + (tl << 1) + (br << 2) + (bl << 3);
095        }
096}