vcglib/apps/nexus/crude2nexus.cpp

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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* 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 (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
/****************************************************************************
History
$Log: not supported by cvs2svn $
2004-07-04 17:30:22 +02:00
Revision 1.3 2004/07/04 14:28:05 ponchio
Finito e debuggato
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Revision 1.2 2004/07/02 17:42:12 ponchio
Backup.
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Revision 1.1 2004/07/02 13:03:01 ponchio
Created
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****************************************************************************/
#include <iostream>
#include <vector>
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#include <set> //DEBUG
#include <map>
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#include "../nexus.h"
#include "../crude.h"
#include "../vert_remap.h"
#include "../vfile.h"
using namespace std;
using namespace vcg;
using namespace nxs;
struct RemapLink {
unsigned int rel_vert;
unsigned int patch;
unsigned int abs_vert;
};
int main(int argc, char *argv[]) {
if(argc <= 2) {
cerr << "Usage: " << argv[0] << " <crude input> <nexus output>\n";
return -1;
}
Crude crude;
if(!crude.Load(argv[1])) {
cerr << "Could not load crude:" << argv[1] << endl;
return -1;
}
VertRemap vert_remap;
if(!vert_remap.Load(argv[1])) {
cerr << "Could not load vert_remap files: " << argv[1] << "\n";
return -1;
}
VFile<unsigned int> face_remap;
if(!face_remap.Load(argv[1] + string(".rmf"))) {
cerr << "Could not load face_remap file: " << argv[1] << ".frm\n";
return -1;
}
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VFile<RemapLink> border_remap;
if(!border_remap.Create(argv[1] + string(".tmp"))) {
cerr << "Could not create temporary border remap file\n";
return -1;
}
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Nexus nexus;
if(!nexus.Create(argv[2])) {
return -1;
}
//lets count faces,
vector<unsigned int> patch_faces;
for(unsigned int i = 0; i < face_remap.Size(); i++) {
unsigned int patch = face_remap[i];
assert(patch != 0xffffffff);
if(patch >= patch_faces.size())
patch_faces.resize(patch+1, 0);
patch_faces[patch]++;
nexus.totface++;
}
cerr << "Vertremap size: " << vert_remap.Size() << endl;
//lets count vertices
vector<unsigned int> patch_verts;
patch_verts.resize(patch_faces.size(), 0);
unsigned int unreferenced = 0;
// counting vertices using border_size for number of vertices
for(unsigned int i = 0; i < vert_remap.all.Size(); i++) {
unsigned int patch = vert_remap.all[i];
if(patch == 0xffffffff) {
unreferenced++;
continue;
}
assert(patch < patch_verts.size());
patch_verts[patch]++;
nexus.totvert++;
}
unsigned int totbord = 0;
VFile<MFHash::Bucket> &border = vert_remap.borders.buffer;
for(unsigned int i = 0; i < border.Size(); i++) {
MFHash::Bucket &bucket = border[i];
if(bucket.key == 0xffffffff) continue;
unsigned int patch = bucket.value;
assert(patch < patch_verts.size());
patch_verts[patch]++;
totbord++;
// nexus.totvert++; (?)
}
if(unreferenced)
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cerr << "Warning: found " << unreferenced << " unreferenced vertices.\n";
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cerr << "Triangles found: " << nexus.totface << endl;
cerr << "Vertex found: " << nexus.totvert << endl;
cerr << "Borders found: " << totbord << endl;
nexus.index.resize(patch_verts.size());
//now that we know various sizes, lets allocate space
for(unsigned int i = 0; i < nexus.index.size(); i++) {
Nexus::Entry &entry = nexus.index[i];
if(patch_faces[i] == 0 || patch_verts[i] == 0)
cerr << "Warning! Empty patch.\n";
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entry.patch_start = nexus.totchunks;
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entry.patch_size = Patch::ChunkSize(patch_verts[i], patch_faces[i]);
nexus.totchunks += entry.patch_size;
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entry.border_start = 0;
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}
nexus.patches.Resize(nexus.totchunks);
//now we sort the faces into the patches (but still using absolute indexing
//instead of relative indexing
for(unsigned int i = 0; i < crude.face.Size(); i++) {
Crude::Face &face = crude.face[i];
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unsigned int npatch = face_remap[i];
Nexus::Entry &entry = nexus.index[npatch];
Patch patch = nexus.GetPatch(npatch);
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if(entry.border_start == 0) { //first time we find patch
entry.border_start = 0xffffffff;
entry.nvert = patch_verts[npatch];
// patch.VertSize() = patch_verts[npatch];
entry.nface = 0;
// patch.FaceSize() = 0;
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}
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Crude::Face *faces = (Crude::Face *)patch.VertBegin();
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faces[entry.nface] = face;
entry.nface++;
// faces[patch.FaceSize()] = face;
// patch.FaceSize()++;
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}
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//finally for every patch we collect the vertices
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//and fill the patch.
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//we need to remember start and size in border_remap;
// vector<unsigned int> border_start;
// vector<unsigned int> border_size;
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for(unsigned int i = 0; i < nexus.index.size(); i++) {
Patch patch = nexus.GetPatch(i);
assert(patch.FaceSize() == patch_faces[i]);
Nexus::Entry &entry = nexus.index[i];
//make a copy of faces (we need to write there :P)
Crude::Face *faces = new Crude::Face[patch_faces[i]];
memcpy(faces, (Crude::Face *)patch.VertBegin(),
patch.FaceSize() * sizeof(Crude::Face));
//collect all vertices we need.
//TODO an hash_map would be faster?
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unsigned int count = 0;
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map<unsigned int, unsigned short> remap;
for(unsigned int k = 0; k < patch.FaceSize(); k++) {
Crude::Face &face = faces[k];
for(int j = 0; j < 3; j++) {
if(!remap.count(face[j])) {
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assert(count < patch.VertSize());
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Point3f &v = crude.vert[face[j]];
patch.VertBegin()[remap.size()] = v;
entry.sphere.Add(v);
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remap[face[j]] = count++;
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}
patch.FaceBegin()[k*3 + j] = remap[face[j]];
}
}
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//record start of border:
entry.border_start = border_remap.Size();
// border_start.push_back(border_remap.Size());
//TODO hash_set?
set<unsigned int> border_patches;
map<unsigned int, unsigned short>::iterator m;
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for(m = remap.begin(); m != remap.end(); m++) {
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RemapLink link;
link.abs_vert = (*m).first;
link.rel_vert = (*m).second;
vert_remap.GetValues(link.abs_vert, border_patches);
assert(border_patches.size() >= 1);
if(border_patches.size() == 1) continue; //its not a border
set<unsigned int>::iterator s;
for(s = border_patches.begin(); s != border_patches.end(); s++) {
if((*s) == i) continue;
link.patch = *s;
border_remap.PushBack(link);
}
}
//and number of borders:
entry.border_size = border_remap.Size() - entry.border_start;
//border_size.push_back(border_remap.Size() - border_start.back());
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delete []faces;
}
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//we can now update bounding sphere.
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for(unsigned int i = 0; i < nexus.index.size(); i++) {
nexus.sphere.Add(nexus.index[i].sphere);
}
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//and last convert RemapLinks into Links
nexus.borders.Resize(border_remap.Size());
for(unsigned int i = 0; i < border_remap.Size(); i++) {
RemapLink start_link = border_remap[i];
Nexus::Entry &entry = nexus.index[start_link.patch];
for(unsigned int k = entry.border_start;
k < entry.border_start + entry.border_size; k++) {
RemapLink end_link = border_remap[k];
if(start_link.abs_vert == end_link.abs_vert) { //found the match
nexus.borders[i] = Link(start_link.rel_vert,
end_link.rel_vert, start_link.patch);
}
}
}
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nexus.Close();
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return 0;
}