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added function static int FollowDirection

This commit is contained in:
Nico Pietroni 2012-12-12 16:03:08 +00:00
parent 8165152573
commit 98a28f8b46
1 changed files with 32 additions and 1 deletions
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33
vcg/complex/algorithms/parametrization/tangent_field_operators.h
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@ -58,6 +58,19 @@ namespace vcg {
return ret; return ret;
} }
static int FollowDirection(const FaceType &f0,
const FaceType &f1,
int dir0)
{
///first it rotate dir to match with f1
CoordType dirS=CrossVector(f0,dir0);
CoordType dirR=vcg::tri::CrossField<MeshType>::Rotate(f0,f1,dirS);
///then get the closest upf to K*PI/2 rotations
CoordType dir1=f1.cPD1();
int ret=I_K_PI(dir1,dirR,f1.cN());
return ret;
}
static int FollowLineDirection(const FaceType &f0, static int FollowLineDirection(const FaceType &f0,
const FaceType &f1, const FaceType &f1,
int dir) int dir)
@ -351,12 +364,30 @@ namespace vcg {
/// a and b should be in the same plane orthogonal to N /// a and b should be in the same plane orthogonal to N
static CoordType K_PI(const CoordType &a, const CoordType &b, const CoordType &n) static CoordType K_PI(const CoordType &a, const CoordType &b, const CoordType &n)
{ {
CoordType c = (a^n).normalized(); CoordType c = (a^n).normalized();///POSSIBLE SOURCE OF BUG CHECK CROSS PRODUCT
ScalarType scorea = a*b; ScalarType scorea = a*b;
ScalarType scorec = c*b; ScalarType scorec = c*b;
if (fabs(scorea)>=fabs(scorec)) return a*Sign(scorea); else return c*Sign(scorec); if (fabs(scorea)>=fabs(scorec)) return a*Sign(scorea); else return c*Sign(scorec);
} }
// returns the 90 deg rotation of a (around n) most similar to target b
/// a and b should be in the same plane orthogonal to N
static int I_K_PI(const CoordType &a, const CoordType &b, const CoordType &n)
{
CoordType c = (n^a).normalized();
ScalarType scorea = a*b;
ScalarType scorec = c*b;
if (fabs(scorea)>=fabs(scorec))///0 or 2
{
if (scorea>0)return 0;
return 2;
}else ///1 or 3
{
if (scorec>0)return 1;
return 3;
}
}
///interpolate cross field with barycentric coordinates ///interpolate cross field with barycentric coordinates
static CoordType InterpolateCrossField(const CoordType &t0, static CoordType InterpolateCrossField(const CoordType &t0,
const CoordType &t1, const CoordType &t1,