BOP_Segment.cpp

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "BOP_Segment.h"

#define UNDEFINED 0

BOP_Segment::BOP_Segment(){
    m_cfg1  = UNDEFINED;
    m_cfg2  = UNDEFINED;  
}

int BOP_Segment::getEdgeBetween(unsigned int v1, unsigned int v2) 
{
    if ((v1 == 1 && v2 == 2) || (v1 == 2 && v2 == 1)) return 1;
    if ((v1 == 3 && v2 == 2) || (v1 == 2 && v2 == 3)) return 2;
    if ((v1 == 1 && v2 == 3) || (v1 == 3 && v2 == 1)) return 3;
    return -1;
}

bool BOP_Segment::isOnEdge(unsigned int v, unsigned int e)
{
    if (v == 1 && (e == 1 || e == 3)) return true;
    if (v == 2 && (e == 1 || e == 2)) return true;
    if (v == 3 && (e == 2 || e == 3)) return true;
    return false;
}

void BOP_Segment::invert()
{
    BOP_Index aux = m_v1;
    m_v1    = m_v2;
    m_v2    = aux;
    aux     = m_cfg1;
    m_cfg1  = m_cfg2;
    m_cfg2  = aux;
}

void BOP_Segment::sort()
{
    if (m_cfg1 < m_cfg2) invert();
}

bool BOP_Segment::isIn(unsigned int cfg)
{
    return (cfg == 20);
}

bool BOP_Segment::isEdge(unsigned int cfg)
{
    return (cfg > 10) && (cfg < 20);
}

bool BOP_Segment::isVertex(unsigned int cfg)
{
    return (cfg!=UNDEFINED) && (cfg < 10);
}

bool BOP_Segment::isDefined(unsigned int cfg)
{
    return (cfg != UNDEFINED);
}   

bool BOP_Segment::isUndefined(unsigned int cfg)
{
    return (cfg == UNDEFINED);
}   

unsigned int BOP_Segment::getEdge(unsigned int cfg)
{
    return cfg-10;
}   

BOP_Index BOP_Segment::getVertex(unsigned int cfg)
{
    return cfg;
}   

unsigned int BOP_Segment::createEdgeCfg(unsigned int edge)
{
    return 10+edge;
}

unsigned int BOP_Segment::createVertexCfg(BOP_Index vertex)
{
    return vertex;
}

unsigned int BOP_Segment::createInCfg()
{
    return 20;
}

unsigned int BOP_Segment::createUndefinedCfg()
{
    return UNDEFINED;
}

unsigned int BOP_Segment::getConfig() 
{
    if (isUndefined(m_cfg1)) return m_cfg2;
    else if (isUndefined(m_cfg2)) return m_cfg1;
    else if (isVertex(m_cfg1)) {
        // v1 is vertex
        if (isVertex(m_cfg2)) {
            // v2 is vertex
            return createEdgeCfg(getEdgeBetween(getVertex(m_cfg1),getVertex(m_cfg2)));
        }
        else if (isEdge(m_cfg2)) {
            // v2 is edge
            if (isOnEdge(m_cfg1,getEdge(m_cfg2))) return m_cfg2;
            else return createInCfg(); //IN
        } 
        else return createInCfg(); //IN
    }
    else if (isEdge(m_cfg1)) {
        // v1 is edge
        if (isVertex(m_cfg2)) {
            // v2 is vertex
            if (isOnEdge(m_cfg2,getEdge(m_cfg1))) return m_cfg1;
            else return createInCfg(); //IN
        }
        else if (isEdge(m_cfg2)) {
            // v2 is edge
            if (m_cfg1 == m_cfg2) return m_cfg1;
            else return createInCfg(); // IN
        }
        else return createInCfg(); // IN
    }
    else return createInCfg(); // IN
}

std::ostream &operator<<(std::ostream &stream, const BOP_Segment &c)
{
    std::cout << "m_v1: " << c.m_v1 << "(" << c.m_cfg1 << ") m_v2: " << c.m_v2 << "(" << c.m_cfg2 << ")";
    return stream;
}