forked from bartvdbraak/blender
196 lines
4.8 KiB
C++
196 lines
4.8 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file boolop/intern/BOP_Splitter.cpp
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* \ingroup boolopintern
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*/
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#include "BOP_Splitter.h"
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#include "BOP_Tag.h"
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#include <iostream>
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using namespace std;
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/**
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* Returns the split point resulting from intersect a plane and a mesh face
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* according to its specified relative edge.
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* @param plane split plane
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* @param m mesh
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* @param f face
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* @param e relative edge index
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* @return intersection point
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*/
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MT_Point3 BOP_splitEdge(MT_Plane3 plane, BOP_Mesh *m, BOP_Face *f, unsigned int e)
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{
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int v1 = -1, v2 = -1;
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switch(e) {
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case 1:
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v1 = f->getVertex(0);
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v2 = f->getVertex(1);
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break;
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case 2:
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v1 = f->getVertex(1);
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v2 = f->getVertex(2);
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break;
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case 3:
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v1 = f->getVertex(2);
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v2 = f->getVertex(0);
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break;
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default:
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// wrong relative edge index!
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break;
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}
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MT_Point3 p1 = m->getVertex(v1)->getPoint();
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MT_Point3 p2 = m->getVertex(v2)->getPoint();
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return BOP_intersectPlane(plane,p1,p2);
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}
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/**
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* Returns the segment resulting from intersect a plane and a mesh face.
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* @param plane split plane
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* @param m mesh
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* @param f face
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* @return segment if there is intersection, NULL otherwise
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*/
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BOP_Segment BOP_splitFace(MT_Plane3 plane, BOP_Mesh *m, BOP_Face *f)
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{
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BOP_Vertex *v1 = m->getVertex(f->getVertex(0));
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BOP_Vertex *v2 = m->getVertex(f->getVertex(1));
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BOP_Vertex *v3 = m->getVertex(f->getVertex(2));
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// Classify face vertices
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BOP_TAG tag1 = BOP_createTAG(BOP_classify(v1->getPoint(),plane));
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BOP_TAG tag2 = BOP_createTAG(BOP_classify(v2->getPoint(),plane));
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BOP_TAG tag3 = BOP_createTAG(BOP_classify(v3->getPoint(),plane));
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// Classify face according to its vertices classification
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BOP_TAG tag = BOP_createTAG(tag1,tag2,tag3);
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BOP_Segment s;
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switch(tag) {
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case IN_IN_IN :
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case OUT_OUT_OUT :
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case ON_ON_ON :
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s.m_cfg1 = s.m_cfg2 = BOP_Segment::createUndefinedCfg();
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break;
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case ON_OUT_OUT :
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case ON_IN_IN :
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s.m_v1 = f->getVertex(0);
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s.m_cfg1 = BOP_Segment::createVertexCfg(1);
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s.m_cfg2 = BOP_Segment::createUndefinedCfg();
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break;
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case OUT_ON_OUT :
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case IN_ON_IN :
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s.m_v1 = f->getVertex(1);
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s.m_cfg1 = BOP_Segment::createVertexCfg(2);
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s.m_cfg2 = BOP_Segment::createUndefinedCfg();
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break;
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case OUT_OUT_ON :
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case IN_IN_ON :
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s.m_v1 = f->getVertex(2);
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s.m_cfg1 = BOP_Segment::createVertexCfg(3);
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s.m_cfg2 = BOP_Segment::createUndefinedCfg();
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break;
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case ON_ON_IN :
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case ON_ON_OUT :
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s.m_v1 = f->getVertex(0);
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s.m_v2 = f->getVertex(1);
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s.m_cfg1 = BOP_Segment::createVertexCfg(1);
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s.m_cfg2 = BOP_Segment::createVertexCfg(2);
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break;
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case ON_OUT_ON :
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case ON_IN_ON :
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s.m_v1 = f->getVertex(0);
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s.m_v2 = f->getVertex(2);
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s.m_cfg1 = BOP_Segment::createVertexCfg(1);
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s.m_cfg2 = BOP_Segment::createVertexCfg(3);
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break;
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case OUT_ON_ON :
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case IN_ON_ON :
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s.m_v1 = f->getVertex(1);
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s.m_v2 = f->getVertex(2);
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s.m_cfg1 = BOP_Segment::createVertexCfg(2);
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s.m_cfg2 = BOP_Segment::createVertexCfg(3);
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break;
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case IN_OUT_ON :
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case OUT_IN_ON :
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s.m_v2 = f->getVertex(2);
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s.m_cfg1 = BOP_Segment::createEdgeCfg(1);
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s.m_cfg2 = BOP_Segment::createVertexCfg(3);
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break;
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case IN_ON_OUT :
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case OUT_ON_IN :
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s.m_v1 = f->getVertex(1);
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s.m_cfg1 = BOP_Segment::createVertexCfg(2);
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s.m_cfg2 = BOP_Segment::createEdgeCfg(3);
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break;
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case ON_IN_OUT :
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case ON_OUT_IN :
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s.m_v1 = f->getVertex(0);
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s.m_cfg1 = BOP_Segment::createVertexCfg(1);
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s.m_cfg2 = BOP_Segment::createEdgeCfg(2);
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break;
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case OUT_IN_IN :
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case IN_OUT_OUT :
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s.m_cfg1 = BOP_Segment::createEdgeCfg(1);
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s.m_cfg2 = BOP_Segment::createEdgeCfg(3);
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break;
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case OUT_IN_OUT :
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case IN_OUT_IN :
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s.m_cfg1 = BOP_Segment::createEdgeCfg(1);
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s.m_cfg2 = BOP_Segment::createEdgeCfg(2);
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break;
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case OUT_OUT_IN :
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case IN_IN_OUT :
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s.m_cfg1 = BOP_Segment::createEdgeCfg(2);
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s.m_cfg2 = BOP_Segment::createEdgeCfg(3);
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break;
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default:
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// wrong TAG!
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break;
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}
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return s;
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}
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