Tetra *MakeTetra(Face *f,Point3 *v[], int n) { Plane p,Mp; boolean found=FALSE; double Radius=BIGNUMBER, rad; Line Lc; int pind=0; Tetra *t; Point3 Center, c; int i; if(!CalcPlane(f->v[0],f->v[1],f->v[2],&p)) Error("MakeTetra, Face with collinar vertices!\n",EXIT); CalcLineofCenter(f->v[0],f->v[1],f->v[2],&Lc); for(i=0;i<n;i++) { if((v[i]!=f->v[0]) && (v[i]!=f->v[1]) && (v[i]!=f->v[2]) && RightSide(&p,v[i]) ) { CalcMiddlePlane(v[i],f->v[0],&Mp); if(CalcLinePlaneInter(&Lc,&Mp,&c)) { rad=V3SquaredDistanceBetween2Points(&c, v[i]); if(!RightSide(&p,&c)) rad=-rad; if(rad==Radius) Error("MakeTetra, Five cocircular points!\n",EXIT); if(rad<Radius) { found=TRUE; Radius=rad; Center=c; pind=i; } } } } if(!found) return NULL; t=BuildTetra(f,v[pind]); if(CheckFlag) CheckTetra(t,v,n); if(StatFlag) {Point3 C; CalcSphereCenter(f->v[0], f->v[1], f->v[2], v[pind], &C); SI.Radius+=V3DistanceBetween2Points(&C, v[pind]); } return t; }
void CheckTetra(Tetra *t, Point3 *v[], int n) { int i; Point3 Center; double Radius; double d; if(!CalcSphereCenter(t->f[0]->v[0], t->f[0]->v[1], t->f[0]->v[2], t->f[1]->v[1], &Center )) Error("CheckTetra, Bad Tetrahedron, CalcSphereCenter Failed!\n",EXIT); Radius = V3DistanceBetween2Points(&Center, t->f[0]->v[0]); for(i=0;i<n;i++) { d=V3DistanceBetween2Points(&Center,v[i]); if( d < Radius - EPSILON) Error("CheckTetra, A not Delaunay Tetrahedron was built!\n",EXIT); } }
Tetra *FastMakeTetra(Face *f, Point3 *v, int n, UG *G) { Plane p; Tetra *t; float CellBoxRadius= 0.0, /* Radius of Cell Box to scan for dd-nearest */ BoxRadius, FaceRadius, MinRadius=BIGNUMBER; struct argGroup args; Line Lc; IntPoint3 vn,vp, start, end, inc; int Index=-1; boolean Found=FALSE; SI.MakeTetra++; UGResetMark(G); if(!CalcPlane(&(v[f->v[0]]),&(v[f->v[1]]),&(v[f->v[2]]),&p)) Error("Faccia composta da tre punti allineati!!\n",EXIT); CalcLineofCenter(&(v[f->v[0]]),&(v[f->v[1]]),&(v[f->v[2]]),&Lc); FaceRadius=V3DistanceBetween2Points(&(Lc.Lu), &(v[f->v[0]])); args.f = f; args.Lc = &Lc; args.p = &p; args.G = G; // printf("checkpoint 0\n"); do { CellBoxRadius++; BoxRadius=CalcBox(f,v,&Lc,G,&vn,&vp, CellBoxRadius*FaceRadius); Found=ScanCellBox(&vn, &vp, v,&args,&Index, &MinRadius); } while(!Found && CellBoxRadius <= 1); //printf("checkpoint 1\n"); // printf("MinRadius = %f BoxRadius = %f\n",MinRadius, BoxRadius); if(Found && MinRadius>BoxRadius) {float oldMinRadius=MinRadius; SI.SecondBox++; // printf("f->v[0] = %d, f->v[1] = %d, f->v[2] = %d, sqrt(MinRadius) = %f\n",f->v[0],f->v[1],f->v[2], sqrt(MinRadius)); BoxRadius=CalcBox(f,v,&Lc,G,&vn,&vp, sqrt(MinRadius)); // printf("checkpoint 2\n"); //printf("vn->x = %d ,vn->y = %d, vn->z = %d, vp->x = %d, vp->y = %d, vp->z = %d, radius = %f\n",vn.x, vn.y, vn.z, vp.x, vp.y,vp.z,MinRadius); ScanCellBox(&vn, &vp, v, &args, &Index, &MinRadius); //printf("checkpoint 2.1\n"); if(oldMinRadius>MinRadius) SI.UsefulSecondBox++; } if(!Found) { //printf("checkpoint 3\n"); SI.EmptyBox++; CalcLastScan(G, &start, &end, &inc, &p); //printf("checkpoint 4\n"); Found=MakeLastScan(&start, &end, &inc, v, &args, &Index,&MinRadius); } //printf("chekpoint 5\n"); if(!Found) return NULL; if(MinRadius>0) { SI.MinRadius+=sqrt(MinRadius); SI.MinRadiusNum++; } t=BuildTetra(f,Index); if(StatFlag) {Point3 C; CalcSphereCenter(&(v[f->v[0]]),&(v[f->v[1]]),&(v[f->v[2]]),&(v[Index]),&C); SI.Radius+=V3DistanceBetween2Points(&C, &(v[Index])); } if(CheckFlag) CheckTetra(t,v,n); return t; }