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vcglib/apps/nexus/voronoinxs.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 $
Revision 1.14 2004/10/10 17:19:42 ponchio
Added compression and debugged.
Revision 1.13 2004/10/09 17:32:25 ponchio
Ram buffer option added (last)
Revision 1.12 2004/10/09 17:29:04 ponchio
Ram buffer option added (again)
Revision 1.11 2004/10/09 17:22:57 ponchio
Ram buffer option added.
Revision 1.10 2004/10/09 16:51:36 ponchio
Windows porting small changes.
Revision 1.9 2004/10/08 15:12:04 ponchio
Working version (maybe)
Revision 1.8 2004/10/06 16:40:47 ponchio
Fixed degenerate faces.
Revision 1.7 2004/10/04 16:49:54 ponchio
Daily backup. Preparing for compression.
Revision 1.6 2004/10/01 16:54:57 ponchio
Daily backup.
Revision 1.5 2004/09/30 00:27:42 ponchio
Lot of changes. Backup.
Revision 1.4 2004/09/21 00:53:23 ponchio
Lotsa changes.
Revision 1.3 2004/09/17 15:25:09 ponchio
First working (hopefully) release.
Revision 1.2 2004/09/16 14:25:16 ponchio
Backup. (lot of changes).
Revision 1.1 2004/08/26 18:03:48 ponchio
First draft.
****************************************************************************/
#ifdef WIN32
#include <wrap/system/getopt.h>
#else
#include <unistd.h>
#endif
#include <iostream>
using namespace std;
#include "crude.h"
#include "nexus.h"
#include "voronoichain.h"
#include "vert_remap.h"
#include "decimate.h"
#include "nxsbuild.h"
using namespace vcg;
using namespace nxs;
/*void RemapVertices(Crude &crude,
VertRemap &vert_remap,
VFile<unsigned int> &face_remap,
vector<unsigned int> &patch_verts);
void NexusAllocate(Crude &crude,
Nexus &nexus,
VFile<unsigned int> &face_remap,
vector<unsigned int> &patch_faces,
vector<unsigned int> &patch_verts);
void NexusFill(Crude &crude,
Nexus &nexus,
VertRemap &vert_remap,
VFile<RemapLink> &border_remap);
void NexusFixBorder(Nexus &nexus,
VFile<RemapLink> &border_remap);*/
void NexusSplit(Nexus &nexus, VoronoiChain &vchain,
unsigned int level,
vector<Point3f> &newvert,
vector<unsigned int> &newface,
vector<Link> &newbord,
Nexus::Update &update,
float error);
/*float Decimate(unsigned int target_faces,
vector<Point3f> &newvert,
vector<unsigned int> &newface,
vector<Link> &newbord,
vector<int> &vert_remap);*/
void ReverseHistory(vector<Nexus::Update> &history);
void TestBorders(Nexus &nexus);
void TestPatches(Nexus &nexus);
int main(int argc, char *argv[]) {
Decimation decimation = CLUSTER;
unsigned int patch_size = 1000;
unsigned int patch_threshold = 0xffffffff;
unsigned int optimization_steps = 5;
bool stop_after_remap = false;
unsigned int max_level = 0xffffffff;
float scaling = 0.5;
unsigned int ram_buffer = 128000000;
unsigned int chunk_size = 1024;
int option;
while((option = getopt(argc, argv, "f:t:l:s:d:ro:b:c:")) != EOF) {
switch(option) {
case 'f': patch_size = atoi(optarg);
if(patch_size == 0 || patch_size > 32000) {
cerr << "Invalid number of faces per patch: " << optarg << endl;
return -1;
}
break;
case 't': patch_threshold = atoi(optarg);
if(patch_threshold == 0 || patch_threshold > patch_size) {
cerr << "Invalid patch threshold: " << optarg << endl;
return -1;
}
break;
case 'l': max_level = atoi(optarg);
if(max_level == 0) {
cerr << "Invalid number of levels: " << optarg << endl;
return -1;
}
break;
case 's': scaling = (float)atof(optarg);
if(scaling <= 0 || scaling >= 1) {
cerr << "Invalid scaling: " << optarg << endl;
cerr << "Must be 0 < scaling < 1" << endl;
}
break;
case 'd':
if(!strcmp("quadric", optarg))
decimation = QUADRIC;
else if(!strcmp("cluster", optarg))
decimation = CLUSTER;
else {
cerr << "Unknown decimation method: " << optarg << endl;
return -1;
}
break;
case 'r': stop_after_remap = true; break;
case 'o': optimization_steps = atoi(optarg); break;
case 'b': ram_buffer = atoi(optarg);
if(ram_buffer == 0) {
cerr << "Invalid ram buffer: " << optarg << endl;
return -1;
}
break;
case 'c': chunk_size = atoi(optarg);
if(chunk_size == 0) {
cerr << "Invalid chunk size: " << optarg << endl;
return -1;
}
break;
default: cerr << "Unknown option: " << (char)option << endl;
return -1;
}
}
//Test that there are still 2 arguments
if(optind != argc - 2) {
cerr << "Usage: " << argv[0] << " <crude> <output> [options]\n";
cerr << " Options:\n";
cerr << " -f N: use N faces per patch (default 1000, max 32000)\n";
cerr << " -t N: mini faces per patch (default 200)\n";
cerr << " -l N: number of levels\n";
cerr << " -s F: scaling factor (0 < F < 1, default 0.5)\n";
cerr << " -o N: nomber of optimization steps\n";
cerr << " -d <method>: decimation method: quadric, cluster. (default quadric)\n";
cerr << " -b N: ram buffer size (in bytes)\n";
return -1;
}
Crude crude;
if(!crude.Load(argv[optind])) {
cerr << "Could not open crude input: " << argv[optind] << endl;
return -1;
}
if(patch_size > crude.vert.Size()/2) {
cerr << "Patch size too big: " << patch_size << " * 2 > " << crude.vert.Size()
<< endl;
return -1;
}
string output = argv[optind+1];
Nexus nexus;
nexus.patches.SetRamBufferSize(ram_buffer);
if(!nexus.Create(output, NXS_FACES, chunk_size)) {
cerr << "Could not create nexus output: " << output << endl;
return -1;
}
if(patch_threshold == 0xffffffff)
patch_threshold = patch_size/4;
VoronoiChain vchain(patch_size, patch_threshold);
// vchain.scaling = scaling;
//Now building level 0 of the Nexus
VFile<unsigned int> face_remap;
if(!face_remap.Create(output + ".rmf")) {
cerr << "Could not create remap files: " << output << ".frm\n";
return -1;
}
face_remap.Resize(crude.Faces());
VertRemap vert_remap;
if(!vert_remap.Create(output)) {
cerr << "Could not create remap files: " << output << ".rmv and .rmb\n";
return -1;
}
vert_remap.Resize(crude.Vertices());
VFile<RemapLink> border_remap;
if(!border_remap.Create(output + string(".tmp"))) {
cerr << "Could not create temporary border remap file\n";
return -1;
}
/* BUILDING FIRST LEVEL */
//Remapping faces and vertices using level 0 and 1 of the chain
cerr << "Remapping faces.\n";
vector<unsigned int> patch_faces;
vchain.RemapFaces(crude, face_remap, patch_faces, scaling, optimization_steps);
cerr << "Remapping vertices.\n";
vector<unsigned int> patch_verts;
patch_verts.resize(patch_faces.size(), 0);
RemapVertices(crude, vert_remap, face_remap, patch_verts);
if(stop_after_remap) return 0;
cerr << "Allocating space\n";
//allocate chunks for patches and copy faces (absoklute indexing) into them.
NexusAllocate(crude, nexus, face_remap, patch_faces, patch_verts);
cerr << "Filling first level\n";
//insert vertices and remap faces, prepare borders
NexusFill(crude, nexus, vert_remap, border_remap);
// NexusFixBorder(nexus, border_remap);
//filling history
Nexus::Update update;
for(unsigned int i = 0; i < nexus.index.size(); i++)
update.created.push_back(i);
nexus.history.push_back(update);
//unify vertices otherwise you may get cracks.
nexus.Unify();
nexus.patches.FlushAll();
/* BUILDING OTHER LEVELS */
unsigned int oldoffset = 0;
for(unsigned int level = 1; level < max_level; level++) {
cerr << "Level: " << level << endl;
unsigned int newoffset = nexus.index.size();
vchain.BuildLevel(nexus, oldoffset, scaling, optimization_steps);
cerr << "Level built\n";
vector<Nexus::Update> level_history;
map<unsigned int, set<unsigned int> >::iterator fragment;
for(fragment = vchain.oldfragments.begin();
fragment != vchain.oldfragments.end(); fragment++) {
update.created.clear();
update.erased.clear();
cerr << "Join ";
set<unsigned int> &fcells = (*fragment).second;
set<unsigned int>::iterator s;
for(s = fcells.begin(); s != fcells.end(); s++) {
update.erased.push_back(*s);
cerr << *s << " ";
}
cerr << endl;
vector<Point3f> newvert;
vector<unsigned int> newface;
vector<Link> newbord;
nexus.Join((*fragment).second, newvert, newface, newbord);
//simplyfy mesh
vector<int> vert_remap;
float error = Decimate(decimation,
(unsigned int)((newface.size()/3) * scaling),
newvert, newface, newbord, vert_remap);
NexusSplit(nexus, vchain, level, newvert, newface, newbord,
update, error);
level_history.push_back(update);
}
for(unsigned int i = 0; i < level_history.size(); i++)
nexus.history.push_back(level_history[i]);
//if(vchain.levels.back().size() == 1) break;
if(vchain.oldfragments.size() == 1) break;
vchain.oldfragments = vchain.newfragments;
oldoffset = newoffset;
}
//last level clean history:
update.created.clear();
update.erased.clear();
map<unsigned int, set<unsigned int> >::iterator fragment;
for(fragment = vchain.newfragments.begin();
fragment != vchain.newfragments.end(); fragment++) {
set<unsigned int> &fcells = (*fragment).second;
set<unsigned int>::iterator s;
for(s = fcells.begin(); s != fcells.end(); s++)
update.erased.push_back(*s);
}
nexus.history.push_back(update);
ReverseHistory(nexus.history);
TestBorders(nexus);
//Clean up:
nexus.Close();
//TODO remove vert_remap, face_remap, border_remap
return 0;
}
void NexusSplit(Nexus &nexus, VoronoiChain &vchain,
unsigned int level,
vector<Point3f> &newvert,
vector<unsigned int> &newface,
vector<Link> &newbord,
Nexus::Update &update,
float error) {
cerr << "Counting nearby cells" << endl;
map<unsigned int, Point3f> centroids;
map<unsigned int, unsigned int> counts;
Point3f centroid(0, 0, 0);
Box3f box;
for(unsigned int f = 0; f < newface.size(); f += 3) {
Point3f bari = (newvert[newface[f]] +
newvert[newface[f+1]] +
newvert[newface[f+2]])/3;
centroid += bari;
box.Add(bari);
unsigned int cell = vchain.Locate(level+1, bari);
if(!centroids.count(cell)) centroids[cell] = Point3f(0, 0, 0);
if(!counts.count(cell)) counts[cell] = 0;
centroids[cell] += bari;
counts[cell]++;
}
centroid /= newface.size()/3;
//prune small cells:
float min_size = (newface.size()/3) / 20;
vector<unsigned int> cellremap;
VoronoiPartition local;
local.SetBox(vchain.levels[level].box);
map<unsigned int, Point3f>::iterator r;
for(r = centroids.begin(); r != centroids.end(); r++) {
unsigned int cell = (*r).first;
if(counts[cell] < min_size) continue;
Point3f seed = (*r).second/counts[cell];
Point3f orig = vchain.levels[level+1][cell].p;
// seed = (seed + orig*2)/3;
seed = orig;
local.push_back(seed);
cellremap.push_back(cell);
}
local.Init();
//if != -1 remap global index to cell index (first arg)
map<unsigned int, vector<int> > vert_remap;
map<unsigned int, unsigned int> vert_count;
//simply collects faces
map<unsigned int, vector<int> > face_remap;
map<unsigned int, unsigned int> face_count;
for(unsigned int f = 0; f < newface.size(); f += 3) {
Point3f bari = (newvert[newface[f]] +
newvert[newface[f+1]] +
newvert[newface[f+2]])/3;
// unsigned int cell = vchain.Locate(level+1, bari);
unsigned int cell = cellremap[local.Locate(bari)];
vector<int> &f_remap = face_remap[cell];
f_remap.push_back(newface[f]);
f_remap.push_back(newface[f+1]);
f_remap.push_back(newface[f+2]);
face_count[cell]++;
if(!vert_remap.count(cell)) {
vert_remap[cell].resize(newvert.size(), -1);
vert_count[cell] = 0;
}
vector<int> &v_remap = vert_remap[cell];
for(int i = 0; i < 3; i++)
if(v_remap[newface[f+i]] == -1)
v_remap[newface[f+i]] = vert_count[cell]++;
}
//TODO prune small count cells and assure no big ones.
//lets count borders
map<unsigned int, unsigned int> bord_count;
map<unsigned int, unsigned int >::iterator c;
for(c = vert_count.begin(); c != vert_count.end(); c++) {
unsigned int cell = (*c).first;
unsigned int &count = bord_count[cell];
count = 0;
vector<int> &v_remap = vert_remap[cell];
//external borders
for(unsigned int i = 0; i < newbord.size(); i++) {
Link link = newbord[i];
if(v_remap[link.start_vert] == -1) continue;
count++;
}
//process internal borders;
//TODO higly inefficient!!!
map<unsigned int, unsigned int >::iterator t;
for(t = vert_count.begin(); t != vert_count.end(); t++) {
if(cell == (*t).first) continue;
vector<int> &vremapclose = vert_remap[(*t).first];
for(unsigned int i = 0; i < newvert.size(); i++) {
if(v_remap[i] != -1 && vremapclose[i] != -1) {
count++;
}
}
}
}
map<unsigned int, unsigned int> cells2patches;
//lets allocate space
for(c = vert_count.begin(); c != vert_count.end(); c++) {
unsigned int cell = (*c).first;
//TODO detect best parameter below.
unsigned int patch_idx = nexus.AddPatch(vert_count[cell],
face_count[cell],
6 * bord_count[cell]);
//why double border space? because at next level
//we will need to add those borders...
cells2patches[cell] = patch_idx;
vchain.newfragments[cell].insert(patch_idx);
update.created.push_back(patch_idx);
}
//fill it now.
for(c = vert_count.begin(); c != vert_count.end(); c++) {
unsigned int cell = (*c).first;
unsigned int patch_idx = cells2patches[cell];
//vertices first
vector<int> &v_remap = vert_remap[cell];
vector<Point3f> verts;
verts.resize(vert_count[cell]);
for(unsigned int i = 0; i < newvert.size(); i++) {
if(v_remap[i] != -1)
verts[v_remap[i]] = newvert[i];
}
//faces now
vector<int> &f_remap = face_remap[cell];
vector<unsigned short> faces;
faces.resize(face_count[cell]*3);
for(unsigned int i = 0; i < f_remap.size(); i++) {
assert(v_remap[f_remap[i]] != -1);
faces[i] = v_remap[f_remap[i]];
}
//borders last
vector<Link> bords;
//process external borders
//for every esternal link we must update external patches!
for(unsigned int i = 0; i < newbord.size(); i++) {
Link link = newbord[i];
assert(!link.IsNull());
if(v_remap[link.start_vert] == -1) continue;
link.start_vert = v_remap[link.start_vert];
bords.push_back(link);
Border rborder = nexus.GetBorder(link.end_patch);
unsigned int pos = rborder.Size();
if(nexus.borders.ResizeBorder(link.end_patch, pos+1)) {
rborder = nexus.GetBorder(link.end_patch);
}
assert(rborder.Size() < rborder.Available());
assert(rborder.Available() > pos);
Link newlink;
newlink.start_vert = link.end_vert;
newlink.end_vert = link.start_vert;
newlink.end_patch = patch_idx;
rborder[pos] = newlink;
}
//process internal borders;
//TODO higly inefficient!!!
map<unsigned int, unsigned int >::iterator t;
for(t = vert_count.begin(); t != vert_count.end(); t++) {
unsigned int rcell = (*t).first;
if(cell == rcell) continue;
assert(cells2patches.count(rcell));
unsigned int rpatch = cells2patches[rcell];
assert(rpatch < nexus.index.size());
vector<int> &vremapclose = vert_remap[rcell];
for(unsigned int i = 0; i < newvert.size(); i++) {
if(v_remap[i] != -1 && vremapclose[i] != -1) {
Link link;
link.end_patch = rpatch;
link.start_vert = v_remap[i];
link.end_vert = vremapclose[i];
bords.push_back(link);
}
}
}
Nexus::PatchInfo &entry = nexus.index[patch_idx];
entry.error = error;
Patch patch = nexus.GetPatch(patch_idx);
memcpy(patch.FaceBegin(), &faces[0],
faces.size() * sizeof(unsigned short));
memcpy(patch.VertBegin(), &verts[0], verts.size() * sizeof(Point3f));
for(unsigned int v = 0; v < verts.size(); v++) {
entry.sphere.Add(verts[v]);
nexus.sphere.Add(verts[v]);
}
Border border = nexus.GetBorder(patch_idx);
assert(border.Available() >= bords.size());
if(nexus.borders.ResizeBorder(patch_idx, bords.size())) {
border = nexus.GetBorder(patch_idx);
}
memcpy(&(border[0]), &(bords[0]), bords.size() * sizeof(Link));
// TestBorders(nexus);
}
}
void ReverseHistory(vector<Nexus::Update> &history) {
reverse(history.begin(), history.end());
vector<Nexus::Update>::iterator i;
for(i = history.begin(); i != history.end(); i++)
swap((*i).erased, (*i).created);
}
void TestPatches(Nexus &nexus) {
cerr << "TESTING PATCHES!!!!" << endl;
for(unsigned int p = 0; p < nexus.index.size(); p++) {
Patch &patch = nexus.GetPatch(p);
for(unsigned int i = 0; i < patch.nf; i++)
for(int k = 0; k < 3; k++)
if(patch.Face(i)[k] >= patch.nv) {
cerr << "Totface: " << patch.nf << endl;
cerr << "Totvert: " << patch.nv << endl;
cerr << "Face: " << i << endl;
cerr << "Val: " << patch.Face(i)[k] << endl;
exit(0);
}
}
}
void TestBorders(Nexus &nexus) {
//check border correctnes
nexus.borders.Flush();
for(unsigned int i = 0; i < nexus.index.size(); i++) {
Border border = nexus.GetBorder(i);
for(unsigned int k = 0; k < border.Size(); k++) {
Link &link = border[k];
if(link.IsNull()) continue;
if(link.end_patch >= nexus.index.size()) {
cerr << "Patch: " << i << endl;
cerr << "Bsize: " << border.Size() << endl;
cerr << "Bava: " << border.Available() << endl;
cerr << "K: " << k << endl;
cerr << "end: " << link.end_patch << endl;
}
assert(link.end_patch < nexus.index.size());
}
}
}
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