WebSVN – gelsvn – Diff – /branches/cpp11-devel/src/HMesh/Manifold.cpp



    {
        if(!in_use(vid))
            return false;
    
        vector<FaceID> faces;
 
        int N = circulate_vertex_ccw(*this, vid, (std::function<void(FaceID)>)[&](FaceID f) {
            faces.push_back(f);
        });
        for(size_t i=0;i<N;++i)
            remove_face(faces[i]);
            

    
    size_t link_intersection(const Manifold& m, VertexID v0, VertexID v1, vector<VertexID>& lisect)
    {
        // get the one-ring of v0
        vector<VertexID> link0;
        circulate_vertex_ccw(m, v0, (std::function<void(VertexID)>)[&](VertexID vn) {
            link0.push_back(vn);
        });
		
        // get the one-ring of v1
        vector<VertexID> link1;
        circulate_vertex_ccw(m, v1, (std::function<void(VertexID)>)[&](VertexID vn) {
            link1.push_back(vn);
        });
		
        // sort the vertices of the two rings
        sort(link0.begin(), link0.end());

                }
            }
            
            
            if(v0b != v0a)
                circulate_vertex_ccw(*this, v0b, (std::function<void(Walker&)>)[&](Walker hew) {
                    kernel.set_vert(hew.opp().halfedge(), v0a);
                });
            
            if(v1b != v1a)
                circulate_vertex_ccw(*this, v1b, (std::function<void(Walker&)>)[&](Walker hew) {
                    kernel.set_vert(hew.opp().halfedge(), v1a);
                });
            
            if(v0a != v0b)
            {

    bool precond_flip_edge(const Manifold& m, HalfEdgeID h)
    {
        Walker j = m.walker(h);
        
        FaceID hf = j.face();
 
        FaceID hof = j.opp().face();
        
        // boundary case
        if(hf == InvalidFaceID || hof == InvalidFaceID)
           return false;
        
        
        // We can only flip an edge if both incident polygons are triangles.
        if(no_edges(m, hf) != 3 || no_edges(m, hof) !=3)
            return false;
        
 
        // non boundary vertices with a valency of less than 4(less than 3 after operation) degenerates mesh.
        VertexID hv = j.vertex();
        VertexID hov = j.opp().vertex();
        if((valency(m, hv) < 4 && !boundary(m, hv)) || (valency(m, hov) < 4 && !boundary(m, hov))){
            return false;
        }
        
        // Disallow flip if vertices being connected already are.
        VertexID hnv = j.next().vertex();
        VertexID honv = j.opp().next().vertex();
        if(connected(m, hnv, honv)){
           return false;
        }
        
        return true;
    }
    
    bool boundary(const Manifold& m, VertexID v)
    {
        Walker j  = m.walker(v);
        return boundary(m, j.halfedge());
    }
 
    int valency(const Manifold& m, VertexID v)
    {
        return circulate_vertex_ccw(m,v, (std::function<void(Walker&)>)[](Walker){});
    }
    
    Manifold::Vec normal(const Manifold& m, VertexID v)
    {
        Manifold::Vec p0 = m.pos(v);
        vector<Manifold::Vec> one_ring;
        
        // run through outgoing edges, and store them normalized
        int N = circulate_vertex_ccw(m, v, (std::function<void(VertexID)>)[&](VertexID vn) {
            Manifold::Vec edge = m.pos(vn) - p0;
            double l = length(edge);
            if(l > 0.0)
                one_ring.push_back(edge/l);
        });

        if(sqr_l > 0.0f) return n / sqrt(sqr_l);
        
        return n;
    }
    
    
    bool connected(const Manifold& m, VertexID v0, VertexID v1)
    {
        bool c=false;
        circulate_vertex_ccw(m, v0, (std::function<void(VertexID)>)[&](VertexID v){ c |= (v==v1);});
        return c;
    }
 
    
    int no_edges(const Manifold& m, FaceID f)
    {
        return circulate_face_ccw(m, f, (std::function<void(Walker&)>)[](Walker w){});
    }
    
    Manifold::Vec normal(const Manifold& m, FaceID f)
    {
        vector<Manifold::Vec> v;
        
        int k= circulate_face_ccw(m, f, (std::function<void(VertexID)>)[&](VertexID vid) {
            v.push_back(m.pos(vid));
        });
        
        Manifold::Vec norm(0);
        for(int i=0;i<k;++i)

    
    double area(const Manifold& m, FaceID fid)
    {
        // Get all projected vertices
        vector<Manifold::Vec> vertices;
        int N = circulate_face_ccw(m, fid, (std::function<void(VertexID)>)[&](VertexID vid) {
            vertices.push_back(m.pos(vid));
        });
 
        
        double area = 0;

    }
    
    Manifold::Vec centre(const Manifold& m, FaceID f)
    {
        Manifold::Vec c(0);
        int n = circulate_face_ccw(m, f, (std::function<void(VertexID)>)[&](VertexID v) {c+=m.pos(v);});
        return c / n;
    }
    
    double perimeter(const Manifold& m, FaceID f)
    {
        double l=0.0;
        circulate_face_ccw(m, f, (std::function<void(HalfEdgeID)>)[&](HalfEdgeID h) { l+= length(m, h);});
        return l;
    }
    
    bool boundary(const Manifold& m, HalfEdgeID h)
    {

Rev 633	Rev 636
Line 184...	Line 184...
184	`{`	184	`{`
185	`if(!in_use(vid))`	185	`if(!in_use(vid))`
186	`return false;`	186	`return false;`
187		187
188	`vector<FaceID> faces;`	188	`vector<FaceID> faces;`
189		-
190	`int N = circulate_vertex_ccw(*this, vid, [&](FaceID f) {`	189	`int N = circulate_vertex_ccw(*this, vid, (std::function<void(FaceID)>)[&](FaceID f) {`
191	`faces.push_back(f);`	190	`faces.push_back(f);`
192	`});`	191	`});`
193	`for(size_t i=0;i<N;++i)`	192	`for(size_t i=0;i<N;++i)`
194	`remove_face(faces[i]);`	193	`remove_face(faces[i]);`
195		194
Line 436...	Line 435...
436		435
437	`size_t link_intersection(const Manifold& m, VertexID v0, VertexID v1, vector<VertexID>& lisect)`	436	`size_t link_intersection(const Manifold& m, VertexID v0, VertexID v1, vector<VertexID>& lisect)`
438	`{`	437	`{`
439	`// get the one-ring of v0`	438	`// get the one-ring of v0`
440	`vector<VertexID> link0;`	439	`vector<VertexID> link0;`
441	`circulate_vertex_ccw(m, v0, [&](VertexID vn) {`	440	`circulate_vertex_ccw(m, v0, (std::function<void(VertexID)>)[&](VertexID vn) {`
442	`link0.push_back(vn);`	441	`link0.push_back(vn);`
443	`});`	442	`});`
444		443
445	`// get the one-ring of v1`	444	`// get the one-ring of v1`
446	`vector<VertexID> link1;`	445	`vector<VertexID> link1;`
447	`circulate_vertex_ccw(m, v1, [&](VertexID vn) {`	446	`circulate_vertex_ccw(m, v1, (std::function<void(VertexID)>)[&](VertexID vn) {`
448	`link1.push_back(vn);`	447	`link1.push_back(vn);`
449	`});`	448	`});`
450		449
451	`// sort the vertices of the two rings`	450	`// sort the vertices of the two rings`
452	`sort(link0.begin(), link0.end());`	451	`sort(link0.begin(), link0.end());`
Line 534...	Line 533...
534	`}`	533	`}`
535	`}`	534	`}`
536		535
537		536
538	`if(v0b != v0a)`	537	`if(v0b != v0a)`
539	`circulate_vertex_ccw(*this, v0b, [&](Walker hew) {`	538	`circulate_vertex_ccw(*this, v0b, (std::function<void(Walker&)>)[&](Walker hew) {`
540	`kernel.set_vert(hew.opp().halfedge(), v0a);`	539	`kernel.set_vert(hew.opp().halfedge(), v0a);`
541	`});`	540	`});`
542		541
543	`if(v1b != v1a)`	542	`if(v1b != v1a)`
544	`circulate_vertex_ccw(*this, v1b, [&](Walker hew) {`	543	`circulate_vertex_ccw(*this, v1b, (std::function<void(Walker&)>)[&](Walker hew) {`
545	`kernel.set_vert(hew.opp().halfedge(), v1a);`	544	`kernel.set_vert(hew.opp().halfedge(), v1a);`
546	`});`	545	`});`
547		546
548	`if(v0a != v0b)`	547	`if(v0a != v0b)`
549	`{`	548	`{`
Line 1300...	Line 1299...
1300	`bool precond_flip_edge(const Manifold& m, HalfEdgeID h)`	1299	`bool precond_flip_edge(const Manifold& m, HalfEdgeID h)`
1301	`{`	1300	`{`
1302	`Walker j = m.walker(h);`	1301	`Walker j = m.walker(h);`
1303		1302
1304	`FaceID hf = j.face();`	1303	`FaceID hf = j.face();`
1305	`// HalfEdgeID ho = j.opp().halfedge();`	-
1306	`FaceID hof = j.opp().face();`	1304	`FaceID hof = j.opp().face();`
1307		1305
1308	`// boundary case`	1306	`// boundary case`
1309	`if(hf == InvalidFaceID \|\| hof == InvalidFaceID)`	1307	`if(hf == InvalidFaceID \|\| hof == InvalidFaceID)`
1310	`return false;`	1308	`return false;`
-		1309
1311		1310
1312	`// We can only flip an edge if both incident polygons are triangles.`	1311	`// We can only flip an edge if both incident polygons are triangles.`
1313	`if(no_edges(m, hf) != 3 \|\| no_edges(m, hof) !=3)`	1312	`if(no_edges(m, hf) != 3 \|\| no_edges(m, hof) !=3)`
1314	`return false;`	1313	`return false;`
1315		1314
-		1315
1316	`// non boundary vertices with a valency of less than 4(less than 3 after operation) degenerates mesh.`	1316	`// non boundary vertices with a valency of less than 4(less than 3 after operation) degenerates mesh.`
1317	`VertexID hv = j.vertex();`	1317	`VertexID hv = j.vertex();`
1318	`VertexID hov = j.opp().vertex();`	1318	`VertexID hov = j.opp().vertex();`
1319	`if((valency(m, hv) < 4 && !boundary(m, hv)) \|\| (valency(m, hov) < 4 && !boundary(m, hov)))`	1319	`if((valency(m, hv) < 4 && !boundary(m, hv)) \|\| (valency(m, hov) < 4 && !boundary(m, hov))){`
1320	`return false;`	1320	`return false;`
-		1321	`}`
1321		1322
1322	`// Disallow flip if vertices being connected already are.`	1323	`// Disallow flip if vertices being connected already are.`
1323	`VertexID hnv = j.next().vertex();`	1324	`VertexID hnv = j.next().vertex();`
1324	`VertexID honv = j.opp().next().vertex();`	1325	`VertexID honv = j.opp().next().vertex();`
1325	`if(connected(m, hnv, honv))`	1326	`if(connected(m, hnv, honv)){`
1326	`return false;`	1327	`return false;`
-		1328	`}`
1327		1329
1328	`return true;`	1330	`return true;`
1329	`}`	1331	`}`
1330		1332
1331	`bool boundary(const Manifold& m, VertexID v)`	1333	`bool boundary(const Manifold& m, VertexID v)`
1332	`{`	1334	`{`
1333	`Walker j = m.walker(v);`	1335	`Walker j = m.walker(v);`
1334	`return boundary(m, j.halfedge());`	1336	`return boundary(m, j.halfedge());`
1335	`}`	1337	`}`
-		1338
1336	`int valency(const Manifold& m, VertexID v)`	1339	`int valency(const Manifold& m, VertexID v)`
1337	`{`	1340	`{`
1338	`return circulate_vertex_ccw(m,v, [](Walker){});`	1341	`return circulate_vertex_ccw(m,v, (std::function<void(Walker&)>)[](Walker){});`
1339	`}`	1342	`}`
1340		1343
1341	`Manifold::Vec normal(const Manifold& m, VertexID v)`	1344	`Manifold::Vec normal(const Manifold& m, VertexID v)`
1342	`{`	1345	`{`
1343	`Manifold::Vec p0 = m.pos(v);`	1346	`Manifold::Vec p0 = m.pos(v);`
1344	`vector<Manifold::Vec> one_ring;`	1347	`vector<Manifold::Vec> one_ring;`
1345		1348
1346	`// run through outgoing edges, and store them normalized`	1349	`// run through outgoing edges, and store them normalized`
1347	`int N = circulate_vertex_ccw(m, v, [&](VertexID vn) {`	1350	`int N = circulate_vertex_ccw(m, v, (std::function<void(VertexID)>)[&](VertexID vn) {`
1348	`Manifold::Vec edge = m.pos(vn) - p0;`	1351	`Manifold::Vec edge = m.pos(vn) - p0;`
1349	`double l = length(edge);`	1352	`double l = length(edge);`
1350	`if(l > 0.0)`	1353	`if(l > 0.0)`
1351	`one_ring.push_back(edge/l);`	1354	`one_ring.push_back(edge/l);`
1352	`});`	1355	`});`
Line 1374...	Line 1377...
1374	`if(sqr_l > 0.0f) return n / sqrt(sqr_l);`	1377	`if(sqr_l > 0.0f) return n / sqrt(sqr_l);`
1375		1378
1376	`return n;`	1379	`return n;`
1377	`}`	1380	`}`
1378		1381
-		1382
1379	`bool connected(const Manifold& m, VertexID v0, VertexID v1)`	1383	`bool connected(const Manifold& m, VertexID v0, VertexID v1)`
1380	`{`	1384	`{`
1381	`bool c=false;`	1385	`bool c=false;`
1382	`circulate_vertex_ccw(m, v0, [&](VertexID v){ c \|= (v==v1);});`	1386	`circulate_vertex_ccw(m, v0, (std::function<void(VertexID)>)[&](VertexID v){ c \|= (v==v1);});`
1383	`return c;`	1387	`return c;`
1384	`}`	1388	`}`
-		1389
1385		1390
1386	`int no_edges(const Manifold& m, FaceID f)`	1391	`int no_edges(const Manifold& m, FaceID f)`
1387	`{`	1392	`{`
1388	`return circulate_face_ccw(m, f, [](Walker w){});`	1393	`return circulate_face_ccw(m, f, (std::function<void(Walker&)>)[](Walker w){});`
1389	`}`	1394	`}`
1390		1395
1391	`Manifold::Vec normal(const Manifold& m, FaceID f)`	1396	`Manifold::Vec normal(const Manifold& m, FaceID f)`
1392	`{`	1397	`{`
1393	`vector<Manifold::Vec> v;`	1398	`vector<Manifold::Vec> v;`
1394		1399
1395	`int k= circulate_face_ccw(m, f, [&](VertexID vid) {`	1400	`int k= circulate_face_ccw(m, f, (std::function<void(VertexID)>)[&](VertexID vid) {`
1396	`v.push_back(m.pos(vid));`	1401	`v.push_back(m.pos(vid));`
1397	`});`	1402	`});`
1398		1403
1399	`Manifold::Vec norm(0);`	1404	`Manifold::Vec norm(0);`
1400	`for(int i=0;i<k;++i)`	1405	`for(int i=0;i<k;++i)`
Line 1412...	Line 1417...
1412		1417
1413	`double area(const Manifold& m, FaceID fid)`	1418	`double area(const Manifold& m, FaceID fid)`
1414	`{`	1419	`{`
1415	`// Get all projected vertices`	1420	`// Get all projected vertices`
1416	`vector<Manifold::Vec> vertices;`	1421	`vector<Manifold::Vec> vertices;`
1417	`int N = circulate_face_ccw(m, fid, [&](VertexID vid) {`	1422	`int N = circulate_face_ccw(m, fid, (std::function<void(VertexID)>)[&](VertexID vid) {`
1418	`vertices.push_back(m.pos(vid));`	1423	`vertices.push_back(m.pos(vid));`
1419	`});`	1424	`});`
1420		1425
1421		1426
1422	`double area = 0;`	1427	`double area = 0;`
Line 1427...	Line 1432...
1427	`}`	1432	`}`
1428		1433
1429	`Manifold::Vec centre(const Manifold& m, FaceID f)`	1434	`Manifold::Vec centre(const Manifold& m, FaceID f)`
1430	`{`	1435	`{`
1431	`Manifold::Vec c(0);`	1436	`Manifold::Vec c(0);`
1432	`int n = circulate_face_ccw(m, f, [&](VertexID v) {c+=m.pos(v);});`	1437	`int n = circulate_face_ccw(m, f, (std::function<void(VertexID)>)[&](VertexID v) {c+=m.pos(v);});`
1433	`return c / n;`	1438	`return c / n;`
1434	`}`	1439	`}`
1435		1440
1436	`double perimeter(const Manifold& m, FaceID f)`	1441	`double perimeter(const Manifold& m, FaceID f)`
1437	`{`	1442	`{`
1438	`double l=0.0;`	1443	`double l=0.0;`
1439	`circulate_face_ccw(m, f, [&](HalfEdgeID h) { l+= length(m, h);});`	1444	`circulate_face_ccw(m, f, (std::function<void(HalfEdgeID)>)[&](HalfEdgeID h) { l+= length(m, h);});`
1440	`return l;`	1445	`return l;`
1441	`}`	1446	`}`
1442		1447
1443	`bool boundary(const Manifold& m, HalfEdgeID h)`	1448	`bool boundary(const Manifold& m, HalfEdgeID h)`
1444	`{`	1449	`{`

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(root)/branches/cpp11-devel/src/HMesh/Manifold.cpp @ 658 – Rev 633 → 636