static void facets (const Vector3d& EPoint, const TNORMAL *Tnormal, Vector3d& normal, TraceThreadData *Thread) { int i; int thisseed; DBL sum, minsum; Vector3d sv, tv, dv, t1, add, newnormal, pert; DBL scale; int UseSquare; int UseUnity; DBL Metric; Vector3d *cv = Thread->Facets_Cube; Metric = dynamic_cast<FacetsPattern*>(Tnormal->pattern.get())->facetsMetric; UseSquare = (Metric == 2 ); UseUnity = (Metric == 1 ); normal.normalize(); if ( dynamic_cast<FacetsPattern*>(Tnormal->pattern.get())->facetsCoords ) { tv = EPoint; } else { tv = normal; } if ( dynamic_cast<FacetsPattern*>(Tnormal->pattern.get())->facetsSize < 1e-6 ) { scale = 1e6; } else { scale = 1. / dynamic_cast<FacetsPattern*>(Tnormal->pattern.get())->facetsSize; } tv *= scale; /* * Check to see if the input point is in the same unit cube as the last * call to this function, to use cache of cubelets for speed. */ thisseed = PickInCube(tv, t1); if (thisseed != Thread->Facets_Last_Seed) { /* * No, not same unit cube. Calculate the random points for this new * cube and its 80 neighbours which differ in any axis by 1 or 2. * Why distance of 2? If there is 1 point in each cube, located * randomly, it is possible for the closest random point to be in the * cube 2 over, or the one two over and one up. It is NOT possible * for it to be two over and two up. Picture a 3x3x3 cube with 9 more * cubes glued onto each face. */ /* Now store a points for this cube and each of the 80 neighbour cubes. */ int cvc = 0; for (add[X] = -2.0; add[X] < 2.5; add[X] +=1.0) { for (add[Y] = -2.0; add[Y] < 2.5; add[Y] += 1.0) { for (add[Z] = -2.0; add[Z] < 2.5; add[Z] += 1.0) { /* For each cubelet in a 5x5 cube. */ if ((fabs(add[X])>1.5)+(fabs(add[Y])>1.5)+(fabs(add[Z])>1.5) <= 1.0) { /* Yes, it's within a 3d knight move away. */ sv = tv + add; PickInCube(sv, t1); cv[cvc] = t1; cvc++; } } } } Thread->Facets_Last_Seed = thisseed; Thread->Facets_CVC = cvc; } /* * Find the point with the shortest distance from the input point. */ dv = cv[0] - tv; if ( UseSquare ) { minsum = dv.lengthSqr(); } else if ( UseUnity ) { minsum = dv[X]+dv[Y]+dv[Z]; } else { minsum = pow(fabs(dv[X]), Metric)+ pow(fabs(dv[Y]), Metric)+ pow(fabs(dv[Z]), Metric); } newnormal = cv[0]; /* Loop for the 81 cubelets to find closest. */ for (i = 1; i < Thread->Facets_CVC; i++) { dv = cv[i] - tv; if ( UseSquare ) { sum = dv.lengthSqr(); } else { if ( UseUnity ) { sum = dv[X]+dv[Y]+dv[Z]; } else { sum = pow(fabs(dv[X]), Metric)+ pow(fabs(dv[Y]), Metric)+ pow(fabs(dv[Z]), Metric); } } if (sum < minsum) { minsum = sum; newnormal = cv[i]; } } if ( dynamic_cast<FacetsPattern*>(Tnormal->pattern.get())->facetsCoords ) { DNoise( pert, newnormal ); sum = dot(pert, normal); newnormal = normal * sum; pert -= newnormal; normal += dynamic_cast<FacetsPattern*>(Tnormal->pattern.get())->facetsCoords * pert; } else { normal = newnormal; } }
static void facets (const VECTOR EPoint, const TNORMAL *Tnormal, VECTOR normal, TraceThreadData *Thread) { int i; int thisseed; DBL sum, minsum; VECTOR sv, tv, dv, t1, add, newnormal, pert; DBL scale; int UseSquare; int UseUnity; DBL Metric; VECTOR *cv = Thread->Facets_Cube; Metric = Tnormal->Vals.Facets.Metric; UseSquare = (Metric == 2 ); UseUnity = (Metric == 1 ); VNormalize( normal, normal ); if ( Tnormal->Vals.Facets.UseCoords ) { Assign_Vector(tv,EPoint); } else { Assign_Vector(tv,normal); } if ( Tnormal->Vals.Facets.Size < 1e-6 ) { scale = 1e6; } else { scale = 1. / Tnormal->Vals.Facets.Size; } VScaleEq( tv, scale ); /* * Check to see if the input point is in the same unit cube as the last * call to this function, to use cache of cubelets for speed. */ thisseed = PickInCube(tv, t1); if (thisseed != Thread->Facets_Last_Seed) { /* * No, not same unit cube. Calculate the random points for this new * cube and its 80 neighbours which differ in any axis by 1 or 2. * Why distance of 2? If there is 1 point in each cube, located * randomly, it is possible for the closest random point to be in the * cube 2 over, or the one two over and one up. It is NOT possible * for it to be two over and two up. Picture a 3x3x3 cube with 9 more * cubes glued onto each face. */ /* Now store a points for this cube and each of the 80 neighbour cubes. */ int cvc = 0; for (add[X] = -2.0; add[X] < 2.5; add[X] +=1.0) { for (add[Y] = -2.0; add[Y] < 2.5; add[Y] += 1.0) { for (add[Z] = -2.0; add[Z] < 2.5; add[Z] += 1.0) { /* For each cubelet in a 5x5 cube. */ if ((fabs(add[X])>1.5)+(fabs(add[Y])>1.5)+(fabs(add[Z])>1.5) <= 1.0) { /* Yes, it's within a 3d knight move away. */ VAdd(sv, tv, add); PickInCube(sv, t1); cv[cvc][X] = t1[X]; cv[cvc][Y] = t1[Y]; cv[cvc][Z] = t1[Z]; cvc++; } } } } Thread->Facets_Last_Seed = thisseed; Thread->Facets_CVC = cvc; } /* * Find the point with the shortest distance from the input point. */ VSub(dv, cv[0], tv); if ( UseSquare ) { minsum = VSumSqr(dv); } else if ( UseUnity ) { minsum = dv[X]+dv[Y]+dv[Z]; } else { minsum = pow(fabs(dv[X]), Metric)+ pow(fabs(dv[Y]), Metric)+ pow(fabs(dv[Z]), Metric); } Assign_Vector( newnormal, cv[0] ); /* Loop for the 81 cubelets to find closest. */ for (i = 1; i < Thread->Facets_CVC; i++) { VSub(dv, cv[i], tv); if ( UseSquare ) { sum = VSumSqr(dv); } else { if ( UseUnity ) { sum = dv[X]+dv[Y]+dv[Z]; } else { sum = pow(fabs(dv[X]), Metric)+ pow(fabs(dv[Y]), Metric)+ pow(fabs(dv[Z]), Metric); } } if (sum < minsum) { minsum = sum; Assign_Vector( newnormal, cv[i] ); } } if ( Tnormal->Vals.Facets.UseCoords ) { DNoise( pert, newnormal ); VDot( sum, pert, normal ); VScale( newnormal, normal, sum ); VSubEq( pert, newnormal ); VAddScaledEq( normal, Tnormal->Vals.Facets.UseCoords, pert ); } else { Assign_Vector( normal, newnormal ); } }