266 lines
7.0 KiB
C++
266 lines
7.0 KiB
C++
#include <vector>
|
|
#include <map>
|
|
#include <iostream>
|
|
|
|
//#include <wrap/strip/tristrip.h>
|
|
|
|
#include "nxsalgo.h"
|
|
#include "nexus.h"
|
|
|
|
using namespace std;
|
|
using namespace nxs;
|
|
using namespace vcg;
|
|
|
|
#include "tristripper/tri_stripper.h"
|
|
using namespace triangle_stripper;
|
|
|
|
void nxs::ComputeNormals(Nexus &nexus) {
|
|
assert(nexus.signature & NXS_NORMALS_SHORT ||
|
|
nexus.signature & NXS_NORMALS_FLOAT);
|
|
|
|
bool use_short = (nexus.signature & NXS_NORMALS_SHORT) != 0;
|
|
|
|
//TODO use a temporary file to store border normals
|
|
unsigned int tmpb_offset = 0;
|
|
vector<unsigned int> tmpb_start;
|
|
VFile<Point3f> tmpb;
|
|
if(!tmpb.Create("tmpb.tmp")) {
|
|
cerr << "Could not create temporary border file\n";
|
|
exit(0);
|
|
}
|
|
|
|
for(unsigned int p = 0; p < nexus.index.size(); p++) {
|
|
Border border = nexus.GetBorder(p);
|
|
tmpb_start.push_back(tmpb_offset);
|
|
tmpb_offset += border.Size();
|
|
}
|
|
|
|
Point3f zero(0.0f, 0.0f, 0.0f);
|
|
tmpb.Resize(tmpb_offset);
|
|
for(unsigned int i = 0; i < tmpb.Size(); i++)
|
|
tmpb[i] = zero;
|
|
tmpb.Flush();
|
|
|
|
//first step normals in the same patch.
|
|
for(unsigned int p = 0; p < nexus.index.size(); p++) {
|
|
Patch &patch = nexus.GetPatch(p);
|
|
|
|
vector<Point3f> normals;
|
|
normals.resize(patch.nv, Point3f(0, 0, 0));
|
|
|
|
|
|
if(nexus.signature & NXS_FACES)
|
|
for(unsigned int i = 0; i < patch.nf; i++) {
|
|
unsigned short *f = patch.Face(i);
|
|
Point3f &v0 = patch.Vert(f[0]);
|
|
Point3f &v1 = patch.Vert(f[1]);
|
|
Point3f &v2 = patch.Vert(f[2]);
|
|
|
|
Point3f norm = (v1 - v0) ^ (v2 - v0);
|
|
normals[f[0]] += norm;
|
|
normals[f[1]] += norm;
|
|
normals[f[2]] += norm;
|
|
}
|
|
|
|
if(nexus.signature & NXS_STRIP)
|
|
for(int i = 0; i < patch.nf - 2; i++) {
|
|
unsigned short *f = patch.FaceBegin() + i;
|
|
Point3f &v0 = patch.Vert(f[0]);
|
|
Point3f &v1 = patch.Vert(f[1]);
|
|
Point3f &v2 = patch.Vert(f[2]);
|
|
|
|
Point3f norm = (v1 - v0) ^ (v2 - v0);
|
|
if(i%2) norm = -norm;
|
|
normals[f[0]] += norm;
|
|
normals[f[1]] += norm;
|
|
normals[f[2]] += norm;
|
|
}
|
|
|
|
if(use_short) {
|
|
for(unsigned int i = 0; i < patch.nv; i++) {
|
|
Point3f &norm = normals[i];
|
|
norm.Normalize();
|
|
short *n = patch.Norm16(i);
|
|
for(int k = 0; k < 3; k++) {
|
|
n[k] = (short)(norm[k] * 32766);
|
|
}
|
|
n[3] = 0;
|
|
}
|
|
} else {
|
|
memcpy(patch.Norm16Begin(), &*normals.begin(),
|
|
normals.size() * sizeof(Point3f));
|
|
}
|
|
Border border = nexus.GetBorder(p);
|
|
|
|
set<unsigned int> close;
|
|
for(unsigned int i = 0; i < border.Size(); i++) {
|
|
Link &link = border[i];
|
|
if(link.IsNull()) continue;
|
|
unsigned int off = tmpb_start[p];
|
|
Point3f p = tmpb.read(off + i);
|
|
p += normals[link.start_vert];
|
|
tmpb.write(off + i, p);
|
|
// tmpb[off + i] += normals[link.start_vert];
|
|
close.insert(link.end_patch);
|
|
}
|
|
|
|
set<unsigned int>::iterator k;
|
|
for(k = close.begin(); k != close.end(); k++) {
|
|
Border remote = nexus.GetBorder(*k);
|
|
unsigned int off = tmpb_start[*k];
|
|
|
|
for(unsigned int i = 0; i < remote.Size(); i++) {
|
|
Link &link = remote[i];
|
|
if(link.IsNull()) continue;
|
|
if(link.end_patch != p) continue;
|
|
Point3f p = tmpb.read(off + i);
|
|
p += normals[link.end_vert];
|
|
tmpb.write(off + i, p);
|
|
// tmpb[off + i] += normals[link.end_vert];
|
|
}
|
|
}
|
|
}
|
|
|
|
//Second step unify normals across borders
|
|
for(unsigned int p = 0; p < nexus.index.size(); p++) {
|
|
Patch &patch = nexus.GetPatch(p);
|
|
Border border = nexus.GetBorder(p);
|
|
|
|
for(unsigned int i = 0; i < border.Size(); i++) {
|
|
Link &link = border[i];
|
|
if(link.IsNull()) continue;
|
|
unsigned int off = tmpb_start[p];
|
|
// Point3f &n = tmpb[off + i];
|
|
Point3f n = tmpb.read(off + i);
|
|
n.Normalize();
|
|
if(use_short) {
|
|
n *= 32766;
|
|
short *np = patch.Norm16(link.start_vert);
|
|
np[0] = (short)n[0];
|
|
np[1] = (short)n[1];
|
|
np[2] = (short)n[2];
|
|
np[3] = 0;
|
|
} else {
|
|
patch.Norm32(link.start_vert) = n;
|
|
}
|
|
}
|
|
}
|
|
//TODO remove temporary file.
|
|
}
|
|
|
|
/*void nxs::ComputeTriStrip(unsigned short nfaces, unsigned short *faces,
|
|
vector<unsigned short> &strip) {
|
|
|
|
|
|
vector<unsigned int> indices;
|
|
indices.resize(nfaces*3);
|
|
for(unsigned int i = 0; i < nfaces*3; i++) {
|
|
indices[i] = faces[i];
|
|
}
|
|
vector<unsigned int> restrip;
|
|
ComputeStrip(indices, restrip);
|
|
|
|
unsigned int len = 0;
|
|
for(unsigned int i = 0; i < restrip.size(); i++) {
|
|
if(restrip[i] != 0xffffffff) {
|
|
strip.push_back(restrip[i]);
|
|
len++;
|
|
} else {
|
|
if(i < restrip.size()-1) { //not the last primitive.
|
|
strip.push_back(restrip[i-1]);
|
|
//TODO optimize this!
|
|
if((len%2) == 1) //do not change orientation....
|
|
strip.push_back(restrip[i-1]);
|
|
strip.push_back(restrip[i+1]);
|
|
}
|
|
len = 0;
|
|
}
|
|
}
|
|
}*/
|
|
|
|
void nxs::ComputeTriStrip(unsigned short nfaces, unsigned short *faces,
|
|
vector<unsigned short> &strip) {
|
|
|
|
|
|
vector<unsigned int> index;
|
|
index.resize(nfaces*3);
|
|
for(int i = 0; i < nfaces*3; i++) {
|
|
index[i] = faces[i];
|
|
}
|
|
int cache_size = 0;
|
|
tri_stripper stripper(index);
|
|
stripper.SetCacheSize(cache_size);
|
|
// = 0 will disable the cache optimizer
|
|
stripper.SetMinStripSize(0);
|
|
tri_stripper::primitives_vector primitives;
|
|
stripper.Strip(&primitives);
|
|
|
|
if(primitives.back().m_Indices.size() < 3) {
|
|
primitives.pop_back();
|
|
}
|
|
//TODO spostare questo dentro il ciclo che rimonta le strip.
|
|
if(primitives.back().m_Type == tri_stripper::PT_Triangles) {
|
|
tri_stripper::primitives p;
|
|
p = primitives.back();
|
|
primitives.pop_back();
|
|
for(unsigned int i = 0; i < p.m_Indices.size(); i += 3) {
|
|
tri_stripper::primitives s;
|
|
s.m_Type = tri_stripper::PT_Triangle_Strip;
|
|
s.m_Indices.push_back(p.m_Indices[i]);
|
|
s.m_Indices.push_back(p.m_Indices[i+1]);
|
|
s.m_Indices.push_back(p.m_Indices[i+2]);
|
|
primitives.push_back(s);
|
|
}
|
|
}
|
|
|
|
for(unsigned int i = 0; i < primitives.size(); i++) {
|
|
tri_stripper::primitives &primitive = primitives[i];
|
|
assert(primitive.m_Indices.size() != 0);
|
|
int len = primitive.m_Indices.size();
|
|
for(int l = 0; l < len; l++)
|
|
strip.push_back(primitive.m_Indices[l]);
|
|
|
|
|
|
if(i < primitives.size()-1) { //not the last primitive.
|
|
strip.push_back(primitive.m_Indices[len-1]);
|
|
//TODO optimize this!
|
|
if((len%2) == 1) //do not change orientation....
|
|
strip.push_back(primitive.m_Indices[len-1]);
|
|
strip.push_back(primitives[i+1].m_Indices[0]);
|
|
}
|
|
}
|
|
}
|
|
|
|
void nxs::Reorder(unsigned int signature, Patch &patch) {
|
|
vector<unsigned> remap;
|
|
remap.resize(patch.nv, 0xffff);
|
|
|
|
int nf = patch.nf;
|
|
if(signature & NXS_FACES)
|
|
nf *= 3;
|
|
|
|
//building remap
|
|
unsigned short *f = patch.FaceBegin();
|
|
unsigned int count = 0;
|
|
for(int i = 0; i < nf; i++) {
|
|
assert(f[i] < remap.size());
|
|
if(remap[f[i]] == 0xffff) {
|
|
remap[f[i]] = count++;
|
|
}
|
|
}
|
|
//test no unreferenced vertices
|
|
for(int i = 0; i < patch.nv; i++)
|
|
if(remap[i] == 0xffff)
|
|
remap[i] = i;
|
|
|
|
//converting faces
|
|
for(int i = 0; i < nf; i++)
|
|
f[i] = remap[f[i]];
|
|
|
|
vector<Point3f> vert;
|
|
vert.resize(patch.nv);
|
|
memcpy(&*vert.begin(), patch.VertBegin(), patch.nv * sizeof(Point3f));
|
|
for(int i = 0; i < patch.nv; i++)
|
|
patch.Vert(remap[i]) = vert[i];
|
|
}
|