moved here from meshlab. Long time due.
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/****************************************************************************
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* VCGLib o o *
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* Visual and Computer Graphics Library o o *
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* _ O _ *
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* Copyright(C) 2004 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (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 (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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#ifndef __VCGLIB_REFINE_LOOP
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#define __VCGLIB_REFINE_LOOP
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#include <math.h>
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#include <vcg/complex/trimesh/base.h>
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#include <vcg/complex/trimesh/refine.h>
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#include <vcg/space/color4.h>
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#include <vcg/container/simple_temporary_data.h>
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#include <vcg/complex/trimesh/update/flag.h>
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#include <vcg/complex/trimesh/update/color.h>
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namespace vcg{
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namespace tri{
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/*
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Metodo di Loop dalla documentazione "Siggraph 2000 course on subdivision"
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d4------d3 d4------d3
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/ \ / \ / \ / \ u
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/ \ / \ / e4--e3 \ / \
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/ \/ \ / / \/ \ \ / \
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d5------d1------d2 -> d5--e5--d1--e2--d2 l--M--r
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\ /\ / \ \ /\ / / \ /
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\ / \ / \ e6--e7 / \ /
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\ / \ / \ / \ / d
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d6------d7 d6------d7
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*******************************************************
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*/
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// Nuovi punti (e.g. midpoint), ossia odd vertices
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//
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template<class MESH_TYPE>
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struct OddPointLoop : public std::unary_function<face::Pos<typename MESH_TYPE::FaceType> , typename MESH_TYPE::CoordType>
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{
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void operator()(typename MESH_TYPE::VertexType &nv, face::Pos<typename MESH_TYPE::FaceType> ep) {
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face::Pos<typename MESH_TYPE::FaceType> he(ep.f,ep.z,ep.f->V(ep.z));
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typename MESH_TYPE::CoordType *l,*r,*u,*d;
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l = &he.v->P();
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he.FlipV();
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r = &he.v->P();
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if( MESH_TYPE::HasPerVertexColor())
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nv.C().lerp(ep.f->V(ep.z)->C(),ep.f->V1(ep.z)->C(),.5f);
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if (he.IsBorder()) {
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nv.P() = ((*l)*0.5 + (*r)*0.5);
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}
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else {
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he.FlipE(); he.FlipV();
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u = &he.v->P();
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he.FlipV(); he.FlipE();
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assert(&he.v->P()== r); // back to r
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he.FlipF(); he.FlipE(); he.FlipV();
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d = &he.v->P();
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// abbiamo i punti l,r,u e d per ottenere M in maniera pesata
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nv.P()=((*l)*(3.0/8.0)+(*r)*(3.0/8.0)+(*d)*(1.0/8.0)+(*u)*(1.0/8.0));
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}
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}
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Color4<typename MESH_TYPE::ScalarType> WedgeInterp(Color4<typename MESH_TYPE::ScalarType> &c0, Color4<typename MESH_TYPE::ScalarType> &c1)
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{
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Color4<typename MESH_TYPE::ScalarType> cc;
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return cc.lerp(c0,c1,0.5f);
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}
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template<class FL_TYPE>
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TexCoord2<FL_TYPE,1> WedgeInterp(TexCoord2<FL_TYPE,1> &t0, TexCoord2<FL_TYPE,1> &t1)
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{
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TexCoord2<FL_TYPE,1> tmp;
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tmp.n()=t0.n();
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tmp.t()=(t0.t()+t1.t())/2.0;
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return tmp;
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}
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};
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// vecchi punti, ossia even vertices
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template<class MESH_TYPE>
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struct EvenPointLoop : public std::unary_function<face::Pos<typename MESH_TYPE::FaceType> , typename MESH_TYPE::CoordType>
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{
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void operator()(typename MESH_TYPE::CoordType &nP, face::Pos<typename MESH_TYPE::FaceType> ep) {
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face::Pos<typename MESH_TYPE::FaceType> he(ep.f,ep.z,ep.f->V(ep.z));
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typename MESH_TYPE::CoordType *r, *l, *curr;
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curr = &he.v->P();
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if (he.IsBorder()) {//half edge di bordo
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he.FlipV();
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r = &he.v->P();
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he.FlipV();
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assert(&he.v->P()== curr); // back to curr
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he.NextB();
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if (&he.v->P() == curr)
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he.FlipV();
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l = &he.v->P();
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nP = ( *(curr) * (3.0)/(4.0) + (*l)*(1.0/8.0) + (*r)*(1.0/8.0));
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}
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else {
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// compute valence of this vertex
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int k = 0;
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face::Pos<typename MESH_TYPE::FaceType> heStart = he;
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std::vector<typename MESH_TYPE::CoordType> otherVertVec;
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if(he.v->IsB())return ;
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do {
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he.FlipV();
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otherVertVec.push_back(he.v->P());
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he.FlipV();
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he.FlipE(); he.FlipF();
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k++;
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} while(he.f!=heStart.f || he.z!=heStart.z || he.v!=heStart.v);
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// while(he != heStart);
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float beta = 3.0 / 16.0;
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if(k > 3 )
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beta = (1.0/(float)k) * (5.0/8.0 - pow((3.0/8.0 + 0.25 * cos(2*M_PI/k)),2));
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*curr = *curr * (1 - k * beta) ;
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typename std::vector<typename MESH_TYPE::CoordType>::iterator iter;
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for (iter = otherVertVec.begin();
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iter != otherVertVec.end();
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++iter) {
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*curr = *curr + (*iter) * beta;
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}
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nP = *curr;
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}
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} // end of operator()
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Color4<typename MESH_TYPE::ScalarType> WedgeInterp(Color4<typename MESH_TYPE::ScalarType> &c0, Color4<typename MESH_TYPE::ScalarType> &c1)
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{
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Color4<typename MESH_TYPE::ScalarType> cc;
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return cc.lerp(c0,c1,0.5f);
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}
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Color4b WedgeInterp(Color4b &c0, Color4b &c1)
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{
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Color4b cc;
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cc.lerp(c0,c1,0.5f);
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return cc;
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}
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template<class FL_TYPE>
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TexCoord2<FL_TYPE,1> WedgeInterp(TexCoord2<FL_TYPE,1> &t0, TexCoord2<FL_TYPE,1> &t1)
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{
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TexCoord2<FL_TYPE,1> tmp;
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// assert(t0.n()== t1.n());
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tmp.n()=t0.n();
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tmp.t()=(t0.t()+t1.t())/2.0;
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return tmp;
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}
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};
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template<class CoordType> struct EvenParam {
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CoordType sum;
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bool border;
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int k;
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} ;
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template<class MESH_TYPE,class ODD_VERT, class EVEN_VERT>
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bool RefineOddEven(MESH_TYPE &m, ODD_VERT odd, EVEN_VERT even,float length,
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bool RefineSelected=false, CallBackPos *cbOdd = 0, CallBackPos *cbEven = 0)
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{
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EdgeLen <MESH_TYPE, typename MESH_TYPE::ScalarType> ep(length);
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return RefineOddEvenE(m, odd, even, ep, RefineSelected, cbOdd, cbEven);
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}
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template<class MESH_TYPE, class ODD_VERT, class EVEN_VERT, class PREDICATE>
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bool RefineOddEvenE(MESH_TYPE &m, ODD_VERT odd, EVEN_VERT even, PREDICATE edgePred,
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bool RefineSelected=false, CallBackPos *cbOdd = 0, CallBackPos *cbEven = 0)
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{
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// n = numero di vertici iniziali
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int n = m.vn;
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// refine dei vertici odd, crea dei nuovi vertici in coda
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RefineE< MESH_TYPE,OddPointLoop<MESH_TYPE> > (m, odd, edgePred, RefineSelected, cbOdd);
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// momentaneamente le callback sono identiche, almeno cbOdd deve essere passata
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cbEven = cbOdd;
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vcg::tri::UpdateFlags<MESH_TYPE>::FaceBorderFromFF(m);
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// aggiorno i flag perche' IsB funzioni
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vcg::tri::UpdateFlags<MESH_TYPE>::VertexBorderFromFace (m);
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//vcg::tri::UpdateColor<MESH_TYPE>::VertexBorderFlag(m);
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// marco i vertici even [ i primi n ] come visitati
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int evenFlag = MESH_TYPE::VertexType::NewBitFlag();
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for (int i = 0; i < n ; i++ ) {
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m.vert[i].SetUserBit(evenFlag);
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}
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int j = 0;
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typename MESH_TYPE::FaceType::ColorType color[6]; // per ogni faccia sono al piu' tre i nuovi valori
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// di texture per wedge (uno per ogni edge)
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typename MESH_TYPE::VertexIterator vi;
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typename MESH_TYPE::FaceIterator fi;
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for (fi = m.face.begin(); fi != m.face.end(); fi++) if(!(*fi).IsD()){ //itero facce
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for (int i = 0; i < 3; i++) { //itero vert
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if ( (*fi).V(i)->IsUserBit(evenFlag) && ! (*fi).V(i)->IsD() ) {
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if (RefineSelected && !(*fi).V(i)->IsS() )
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break;
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face::Pos<typename MESH_TYPE::FaceType>aux (&(*fi),i);
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if( MESH_TYPE::HasPerVertexColor() ) {
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(*fi).V(i)->C().lerp((*fi).V0(i)->C() , (*fi).V1(i)->C(),0.5f);
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}
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if (cbEven) {
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(*cbEven)(int(100.0f * (float)j / (float)m.fn),"Refining");
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j++;
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}
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even((*fi).V(i)->P(), aux);
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}
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}
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}
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return true;
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}
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} // namespace tri
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} // namespace vcg
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#endif
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