224 lines
6.4 KiB
C++
224 lines
6.4 KiB
C++
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#include "nxsbuild.h"
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#include <set>
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#include <map>
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using namespace nxs;
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using namespace vcg;
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using namespace std;
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void nxs::RemapVertices(Crude &crude,
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VertRemap &vert_remap,
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VFile<unsigned int> &face_remap,
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vector<unsigned int> &patch_verts) {
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for(unsigned int i = 0; i < crude.Faces(); i++) {
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Crude::Face &face = crude.GetFace(i);
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unsigned int patch = face_remap[i];
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for(int k = 0; k < 3; k++) {
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set<unsigned int> pp;
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vert_remap.GetValues(face[k], pp);
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if(!pp.count(patch)) {
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vert_remap.Insert(face[k], patch);
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patch_verts[patch]++;
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}
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}
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}
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}
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void nxs::NexusAllocate(Crude &crude,
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Nexus &nexus,
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VFile<unsigned int> &face_remap,
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vector<unsigned int> &patch_faces,
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vector<unsigned int> &patch_verts) {
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nexus.index.resize(patch_faces.size());
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unsigned int totchunks = 0;
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//now that we know various sizes, lets allocate space
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for(unsigned int i = 0; i < nexus.index.size(); i++) {
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Nexus::Entry &entry = nexus.index[i];
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if(patch_faces[i] == 0 || patch_verts[i] == 0)
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cerr << "Warning! Empty patch.\n";
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entry.patch_start = totchunks;
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entry.patch_size = Patch::ChunkSize(nexus.signature,
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patch_verts[i], patch_faces[i]);
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totchunks += entry.patch_size;
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entry.border_start = 0xffffffff;
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entry.nvert = patch_verts[i];
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entry.nface = 0;
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entry.error = 0;
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}
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nexus.patches.Resize(totchunks);
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//now we sort the faces into the patches (but still using absolute indexing
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//instead of relative indexing
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for(unsigned int i = 0; i < crude.face.Size(); i++) {
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Crude::Face &face = crude.face[i];
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unsigned int npatch = face_remap[i];
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Nexus::Entry &entry = nexus.index[npatch];
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//TODO this is slow because we have to initialize patch.
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//just get patch.start.
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Patch patch = nexus.GetPatch(npatch);
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Crude::Face *faces = (Crude::Face *)patch.start;
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faces[entry.nface] = face;
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entry.nface++;
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}
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}
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void nxs::NexusFill(Crude &crude,
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Nexus &nexus,
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VertRemap &vert_remap,
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VFile<RemapLink> &border_remap) {
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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;
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// vector<unsigned int> border_start;
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// vector<unsigned int> border_size;
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for(unsigned int i = 0; i < nexus.index.size(); i++) {
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Patch patch = nexus.GetPatch(i);
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Nexus::Entry &entry = nexus.index[i];
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//make a copy of faces (we need to write there :P)
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Crude::Face *faces = new Crude::Face[patch.nf];
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memcpy(faces, (Crude::Face *)patch.start,
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patch.nf * sizeof(Crude::Face));
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//collect all vertices we need.
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//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;
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for(unsigned int k = 0; k < patch.nf; k++) {
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Crude::Face &face = faces[k];
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for(int j = 0; j < 3; j++) {
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if(!remap.count(face[j])) {
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assert(count < patch.nv);
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Point3f &v = crude.vert[face[j]];
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patch.VertBegin()[remap.size()] = v;
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entry.sphere.Add(v);
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remap[face[j]] = count++;
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}
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patch.FaceBegin()[k*3 + j] = remap[face[j]];
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}
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}
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assert(count == remap.size());
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assert(entry.nvert == remap.size());
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//record start of border:
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entry.border_start = border_remap.Size();
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//TODO hash_set?
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set<unsigned int> border_patches;
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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;
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link.abs_vert = (*m).first;
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link.rel_vert = (*m).second;
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vert_remap.GetValues(link.abs_vert, border_patches);
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assert(border_patches.size() >= 1);
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if(border_patches.size() == 1) continue; //its not a border
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set<unsigned int>::iterator s;
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for(s = border_patches.begin(); s != border_patches.end(); s++) {
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if((*s) == i) continue;
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link.patch = *s;
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border_remap.PushBack(link);
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}
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}
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//and number of borders:
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entry.border_used = border_remap.Size() - entry.border_start;
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delete []faces;
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}
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//we can now update bounding sphere.
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for(unsigned int i = 0; i < nexus.index.size(); i++)
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nexus.sphere.Add(nexus.index[i].sphere);
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}
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void nxs::NexusFixBorder(Nexus &nexus,
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VFile<RemapLink> &border_remap) {
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//and last convert RemapLinks into Links
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nexus.borders.Resize(border_remap.Size() * 2);
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//* 2 is to accomodate future borders
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for(unsigned int i = 0; i < nexus.index.size(); i++) {
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Nexus::Entry &local = nexus.index[i];
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local.border_start *= 2;
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local.border_size = local.border_used * 2;
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}
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for(unsigned int i = 0; i < nexus.index.size(); i++) {
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Nexus::Entry &local = nexus.index[i];
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unsigned int remap_start = local.border_start/2;
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//* 2 is to accomodate future borders
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// K is the main iterator (where we write to in nexus.borders)
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for(unsigned int k = 0; k < local.border_used; k++) {
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RemapLink start_link = border_remap[k + remap_start];
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assert(start_link.rel_vert < local.nvert);
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Nexus::Entry &remote = nexus.index[start_link.patch];
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bool found = false;
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unsigned int remote_remap_start = remote.border_start/2;
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for(unsigned int j = 0; j < remote.border_used; j++) {
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RemapLink end_link = border_remap[j + remote_remap_start];
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assert(end_link.rel_vert < remote.nvert);
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if(start_link.abs_vert == end_link.abs_vert &&
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end_link.patch == i) { //found the match
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assert(!found);
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nexus.borders[k + local.border_start] = Link(start_link.rel_vert,
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end_link.rel_vert,
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start_link.patch);
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found = true;
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}
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}
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assert(nexus.borders[k + local.border_start].start_vert < local.nvert);
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assert(found);
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}
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}
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nexus.borders.Flush();
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//Checking border consistency:
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/* for(unsigned int i = 0; i < nexus.index.size(); i++) {
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Border border = nexus.GetBorder(i);
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Nexus::Entry &entry = nexus.index[i];
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for(unsigned int k = 0; k < border.Size(); k++) {
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Link &link = border[k];
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if(link.start_vert >= entry.nvert) {
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cerr << "K: " << k << endl;
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cerr << "patch: " << i << " nvert: " << entry.nvert << " startv: "
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<< link.start_vert << endl;
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cerr << "bstart: " << entry.border_start
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<< "bsize: " << entry.border_size << endl;
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}
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assert(link.end_patch < nexus.index.size());
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assert(link.start_vert < entry.nvert);
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Nexus::Entry &remote = nexus.index[link.end_patch];
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assert(link.end_vert < remote.nvert);
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}
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}*/
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}
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