159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/* 259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Copyright (c) 2009-2010 jMonkeyEngine 359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * All rights reserved. 459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Redistribution and use in source and binary forms, with or without 659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * modification, are permitted provided that the following conditions are 759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * met: 859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Redistributions of source code must retain the above copyright 1059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * notice, this list of conditions and the following disclaimer. 1159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Redistributions in binary form must reproduce the above copyright 1359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * notice, this list of conditions and the following disclaimer in the 1459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * documentation and/or other materials provided with the distribution. 1559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 1759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * may be used to endorse or promote products derived from this software 1859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * without specific prior written permission. 1959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 2059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 2459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 2759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 2859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 2959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 3259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3359b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapackage jme3tools.converters.model.strip; 3459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/** 3659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 3759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 3859b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaclass StripInfo { 3959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta StripStartInfo m_startInfo; 4159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfoVec m_faces = new FaceInfoVec(); 4259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int m_stripId; 4359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int m_experimentId; 4459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta boolean visited; 4659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int m_numDegenerates; 4859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 5059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public StripInfo(StripStartInfo startInfo,int stripId, int experimentId) { 5159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 5259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta m_startInfo = startInfo; 5359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta m_stripId = stripId; 5459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta m_experimentId = experimentId; 5559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta visited = false; 5659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta m_numDegenerates = 0; 5759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 5859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 5959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta boolean isExperiment() { 6059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return m_experimentId >= 0; 6159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 6259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta boolean isInStrip(FaceInfo faceInfo) { 6459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if(faceInfo == null) 6559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return false; 6659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return (m_experimentId >= 0 ? faceInfo.m_testStripId == m_stripId : faceInfo.m_stripId == m_stripId); 6859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 6959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 7059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 7159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/////////////////////////////////////////////////////////////////////////////////////////// 7259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// IsMarked() 7359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// 7459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// If either the faceInfo has a real strip index because it is 7559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// already assign to a committed strip OR it is assigned in an 7659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// experiment and the experiment index is the one we are building 7759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// for, then it is marked and unavailable 7859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta boolean isMarked(FaceInfo faceInfo){ 7959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return (faceInfo.m_stripId >= 0) || (isExperiment() && faceInfo.m_experimentId == m_experimentId); 8059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 8159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/////////////////////////////////////////////////////////////////////////////////////////// 8459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// MarkTriangle() 8559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// 8659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// Marks the face with the current strip ID 8759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// 8859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta void markTriangle(FaceInfo faceInfo){ 8959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (isExperiment()){ 9059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta faceInfo.m_experimentId = m_experimentId; 9159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta faceInfo.m_testStripId = m_stripId; 9259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta else{ 9459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta faceInfo.m_experimentId = -1; 9559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta faceInfo.m_stripId = m_stripId; 9659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 9959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 10059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta boolean unique(FaceInfoVec faceVec, FaceInfo face) 10159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 10259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta boolean bv0, bv1, bv2; //bools to indicate whether a vertex is in the faceVec or not 10359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta bv0 = bv1 = bv2 = false; 10459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 10559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for(int i = 0; i < faceVec.size(); i++) 10659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 10759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if(!bv0) 10859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 10959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if( (faceVec.at(i).m_v0 == face.m_v0) || 11059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta (faceVec.at(i).m_v1 == face.m_v0) || 11159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta (faceVec.at(i).m_v2 == face.m_v0) ) 11259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta bv0 = true; 11359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 11459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 11559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if(!bv1) 11659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 11759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if( (faceVec.at(i).m_v0 == face.m_v1) || 11859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta (faceVec.at(i).m_v1 == face.m_v1) || 11959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta (faceVec.at(i).m_v2 == face.m_v1) ) 12059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta bv1 = true; 12159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 12259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 12359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if(!bv2) 12459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 12559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if( (faceVec.at(i).m_v0 == face.m_v2) || 12659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta (faceVec.at(i).m_v1 == face.m_v2) || 12759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta (faceVec.at(i).m_v2 == face.m_v2) ) 12859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta bv2 = true; 12959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 13059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 13159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //the face is not unique, all it's vertices exist in the face vector 13259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if(bv0 && bv1 && bv2) 13359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return false; 13459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 13559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 13659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //if we get out here, it's unique 13759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return true; 13859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 13959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 14059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 14159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/////////////////////////////////////////////////////////////////////////////////////////// 14259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// Build() 14359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// 14459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// Builds a strip forward as far as we can go, then builds backwards, and joins the two lists 14559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// 14659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta void build(EdgeInfoVec edgeInfos, FaceInfoVec faceInfos) 14759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 14859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // used in building the strips forward and backward 14959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta IntVec scratchIndices = new IntVec(); 15059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 15159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // build forward... start with the initial face 15259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfoVec forwardFaces = new FaceInfoVec(); 15359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfoVec backwardFaces = new FaceInfoVec(); 15459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta forwardFaces.add(m_startInfo.m_startFace); 15559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 15659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta markTriangle(m_startInfo.m_startFace); 15759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 15859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int v0 = (m_startInfo.m_toV1 ? m_startInfo.m_startEdge.m_v0 : m_startInfo.m_startEdge.m_v1); 15959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int v1 = (m_startInfo.m_toV1 ? m_startInfo.m_startEdge.m_v1 : m_startInfo.m_startEdge.m_v0); 16059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 16159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // easiest way to get v2 is to use this function which requires the 16259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // other indices to already be in the list. 16359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.add(v0); 16459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.add(v1); 16559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int v2 = Stripifier.getNextIndex(scratchIndices, m_startInfo.m_startFace); 16659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.add(v2); 16759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 16859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // 16959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // build the forward list 17059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // 17159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int nv0 = v1; 17259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int nv1 = v2; 17359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 17459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfo nextFace = Stripifier.findOtherFace(edgeInfos, nv0, nv1, m_startInfo.m_startFace); 17559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta while (nextFace != null && !isMarked(nextFace)) 17659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 17759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //check to see if this next face is going to cause us to die soon 17859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int testnv0 = nv1; 17959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int testnv1 = Stripifier.getNextIndex(scratchIndices, nextFace); 18059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 18159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfo nextNextFace = Stripifier.findOtherFace(edgeInfos, testnv0, testnv1, nextFace); 18259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 18359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if( (nextNextFace == null) || (isMarked(nextNextFace)) ) 18459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 18559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //uh, oh, we're following a dead end, try swapping 18659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfo testNextFace = Stripifier.findOtherFace(edgeInfos, nv0, testnv1, nextFace); 18759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 18859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if( ((testNextFace != null) && !isMarked(testNextFace)) ) 18959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 19059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //we only swap if it buys us something 19159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 19259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //add a "fake" degenerate face 19359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfo tempFace = new FaceInfo(nv0, nv1, nv0); 19459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 19559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta forwardFaces.add(tempFace); 19659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta markTriangle(tempFace); 19759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 19859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.add(nv0); 19959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta testnv0 = nv0; 20059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 20159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta ++m_numDegenerates; 20259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 20359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 20459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 20559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 20659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // add this to the strip 20759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta forwardFaces.add(nextFace); 20859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 20959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta markTriangle(nextFace); 21059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 21159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // add the index 21259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //nv0 = nv1; 21359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //nv1 = NvStripifier::GetNextIndex(scratchIndices, nextFace); 21459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.add(testnv1); 21559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 21659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // and get the next face 21759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta nv0 = testnv0; 21859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta nv1 = testnv1; 21959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 22059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta nextFace = Stripifier.findOtherFace(edgeInfos, nv0, nv1, nextFace); 22159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 22259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 22359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 22459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // tempAllFaces is going to be forwardFaces + backwardFaces 22559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // it's used for Unique() 22659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfoVec tempAllFaces = new FaceInfoVec(); 22759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for(int i = 0; i < forwardFaces.size(); i++) 22859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta tempAllFaces.add(forwardFaces.at(i)); 22959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 23059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // 23159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // reset the indices for building the strip backwards and do so 23259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // 23359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.clear(); 23459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.add(v2); 23559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.add(v1); 23659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.add(v0); 23759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta nv0 = v1; 23859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta nv1 = v0; 23959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta nextFace = Stripifier.findOtherFace(edgeInfos, nv0, nv1, m_startInfo.m_startFace); 24059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta while (nextFace != null && !isMarked(nextFace)) 24159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 24259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //this tests to see if a face is "unique", meaning that its vertices aren't already in the list 24359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // so, strips which "wrap-around" are not allowed 24459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if(!unique(tempAllFaces, nextFace)) 24559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta break; 24659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 24759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //check to see if this next face is going to cause us to die soon 24859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int testnv0 = nv1; 24959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int testnv1 = Stripifier.getNextIndex(scratchIndices, nextFace); 25059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 25159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfo nextNextFace = Stripifier.findOtherFace(edgeInfos, testnv0, testnv1, nextFace); 25259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 25359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if( (nextNextFace == null) || (isMarked(nextNextFace)) ) 25459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 25559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //uh, oh, we're following a dead end, try swapping 25659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfo testNextFace = Stripifier.findOtherFace(edgeInfos, nv0, testnv1, nextFace); 25759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if( ((testNextFace != null) && !isMarked(testNextFace)) ) 25859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 25959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //we only swap if it buys us something 26059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 26159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //add a "fake" degenerate face 26259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta FaceInfo tempFace = new FaceInfo(nv0, nv1, nv0); 26359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 26459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta backwardFaces.add(tempFace); 26559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta markTriangle(tempFace); 26659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.add(nv0); 26759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta testnv0 = nv0; 26859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 26959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta ++m_numDegenerates; 27059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 27159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 27259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 27359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 27459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // add this to the strip 27559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta backwardFaces.add(nextFace); 27659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 27759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //this is just so Unique() will work 27859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta tempAllFaces.add(nextFace); 27959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 28059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta markTriangle(nextFace); 28159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 28259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // add the index 28359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //nv0 = nv1; 28459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //nv1 = NvStripifier::GetNextIndex(scratchIndices, nextFace); 28559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta scratchIndices.add(testnv1); 28659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 28759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // and get the next face 28859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta nv0 = testnv0; 28959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta nv1 = testnv1; 29059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta nextFace = Stripifier.findOtherFace(edgeInfos, nv0, nv1, nextFace); 29159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 29259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 29359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // Combine the forward and backwards stripification lists and put into our own face vector 29459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta combine(forwardFaces, backwardFaces); 29559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 29659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 29759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 29859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/////////////////////////////////////////////////////////////////////////////////////////// 29959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// Combine() 30059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// 30159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// Combines the two input face vectors and puts the result into m_faces 30259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// 30359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta void combine(FaceInfoVec forward, FaceInfoVec backward){ 30459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 30559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // add backward faces 30659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int numFaces = backward.size(); 30759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for (int i = numFaces - 1; i >= 0; i--) 30859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta m_faces.add(backward.at(i)); 30959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 31059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta // add forward faces 31159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta numFaces = forward.size(); 31259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for (int i = 0; i < numFaces; i++) 31359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta m_faces.add(forward.at(i)); 31459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 31559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 31659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 31759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/////////////////////////////////////////////////////////////////////////////////////////// 31859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// SharesEdge() 31959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// 32059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// Returns true if the input face and the current strip share an edge 32159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta// 32259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta boolean sharesEdge(FaceInfo faceInfo, EdgeInfoVec edgeInfos) 32359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta { 32459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //check v0.v1 edge 32559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta EdgeInfo currEdge = Stripifier.findEdgeInfo(edgeInfos, faceInfo.m_v0, faceInfo.m_v1); 32659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 32759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if(isInStrip(currEdge.m_face0) || isInStrip(currEdge.m_face1)) 32859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return true; 32959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 33059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //check v1.v2 edge 33159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta currEdge = Stripifier.findEdgeInfo(edgeInfos, faceInfo.m_v1, faceInfo.m_v2); 33259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 33359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if(isInStrip(currEdge.m_face0) || isInStrip(currEdge.m_face1)) 33459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return true; 33559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 33659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta //check v2.v0 edge 33759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta currEdge = Stripifier.findEdgeInfo(edgeInfos, faceInfo.m_v2, faceInfo.m_v0); 33859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 33959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if(isInStrip(currEdge.m_face0) || isInStrip(currEdge.m_face1)) 34059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return true; 34159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 34259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return false; 34359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 34459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 34559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 34659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 34759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 34859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 34959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 35059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 35159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 35259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 35359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 35459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 35559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta} 356