From 4ee645493aa195c4bdf29457c02cc21a71b38d95 Mon Sep 17 00:00:00 2001
From: Christophe Geuzaine <cgeuzaine@ulg.ac.be>
Date: Sun, 3 Dec 2006 00:35:56 +0000
Subject: [PATCH] add extra arg to XYZtoUV so we can use it also for point that
are not on the surface
---
Geo/GFace.cpp | 47 ++++++++++++++++-------------------
Geo/GFace.h | 8 +++---
Mesh/meshGFaceTransfinite.cpp | 7 +++---
3 files changed, 29 insertions(+), 33 deletions(-)
diff --git a/Geo/GFace.cpp b/Geo/GFace.cpp
index 7c1d108e5a..6ee192e4ba 100644
--- a/Geo/GFace.cpp
+++ b/Geo/GFace.cpp
@@ -1,4 +1,4 @@
-// $Id: GFace.cpp,v 1.24 2006-12-03 00:04:31 geuzaine Exp $
+// $Id: GFace.cpp,v 1.25 2006-12-03 00:35:56 geuzaine Exp $
//
// Copyright (C) 1997-2007 C. Geuzaine, J.-F. Remacle
//
@@ -399,37 +399,34 @@ double GFace::curvature (const SPoint2 ¶m) const
}
void GFace::XYZtoUV(const double X, const double Y, const double Z,
- double &U, double &V,
- const double relax) const
+ double &U, double &V, const double relax,
+ bool onSurface) const
{
const double Precision = 1.e-8;
const int MaxIter = 25;
const int NumInitGuess = 11;
- double Unew = 0., Vnew = 0., err, err_xyz;
- int iter;
+ double Unew = 0., Vnew = 0.;
double mat[3][3], jac[3][3];
- double umin, umax, vmin, vmax;
- double init[NumInitGuess] = {0.487, 0.6, 0.4, 0.7, 0.3, 0.8, 0.2, 0.9, 0.1,0,1};
-
+ double init[NumInitGuess] = {0.487, 0.6, 0.4, 0.7, 0.3, 0.8, 0.2, 0.9, 0.1, 0, 1};
Range<double> ru = parBounds(0);
Range<double> rv = parBounds(1);
- umin = ru.low();
- umax = ru.high();
- vmin = rv.low();
- vmax = rv.high();
+ double umin = ru.low();
+ double umax = ru.high();
+ double vmin = rv.low();
+ double vmax = rv.high();
for(int i = 0; i < NumInitGuess; i++){
for(int j = 0; j < NumInitGuess; j++){
U = init[i];
V = init[j];
- err = 1.0;
- iter = 1;
+ int err = 1.0, err_xyz = 0.;
+ int iter = 1;
while(err > Precision && iter < MaxIter) {
- GPoint P = point(U,V);
- Pair<SVector3,SVector3> der = firstDer(SPoint2(U,V));
+ GPoint P = point(U, V);
+ Pair<SVector3, SVector3> der = firstDer(SPoint2(U, V));
mat[0][0] = der.left().x();
mat[0][1] = der.left().y();
mat[0][2] = der.left().z();
@@ -449,7 +446,8 @@ void GFace::XYZtoUV(const double X, const double Y, const double Z,
jac[2][1] * (Z - P.z()));
err = DSQR(Unew - U) + DSQR(Vnew - V);
- err_xyz = DSQR(X - P.x()) + DSQR(Y - P.y()) + DSQR(Z - P.z());
+ if(onSurface)
+ err_xyz = DSQR(X - P.x()) + DSQR(Y - P.y()) + DSQR(Z - P.z());
iter++;
U = Unew;
V = Vnew;
@@ -458,7 +456,7 @@ void GFace::XYZtoUV(const double X, const double Y, const double Z,
if(iter < MaxIter && err <= Precision &&
Unew <= umax && Vnew <= vmax &&
Unew >= umin && Vnew >= vmin){
- if(err_xyz > 1.e-5)
+ if(onSurface && err_xyz > Precision * CTX.lc)
Msg(WARNING,"converged for i=%d j=%d (err=%g iter=%d), but err_xyz = %g",
i, j, err, iter, err_xyz);
return;
@@ -466,21 +464,20 @@ void GFace::XYZtoUV(const double X, const double Y, const double Z,
}
}
- if(relax < 1.e-6)
+ if(relax < 1.e-6){
Msg(GERROR, "Could not converge: surface mesh will be wrong");
+ }
else {
Msg(INFO, "Relaxation factor = %g", 0.75 * relax);
- XYZtoUV(X, Y, Z, U, V, 0.75 * relax);
+ XYZtoUV(X, Y, Z, U, V, 0.75 * relax, onSurface);
}
}
-
SPoint2 GFace::parFromPoint(const SPoint3 &p) const
{
- double U,V;
+ double U, V;
- XYZtoUV(p.x(),p.y(),p.z(),U,V,1.0);
+ XYZtoUV(p.x(), p.y(), p.z(), U, V, 1.0);
- return SPoint2(U,V);
+ return SPoint2(U, V);
}
-
diff --git a/Geo/GFace.h b/Geo/GFace.h
index 94803e19ae..886e55e50d 100644
--- a/Geo/GFace.h
+++ b/Geo/GFace.h
@@ -76,10 +76,10 @@ class GFace : public GEntity
virtual int dim() const {return 2;}
virtual void setVisibility(char val, bool recursive=false);
- // compute XYZ from parametric UV
+ // compute the parameters UV from a point XYZ
void XYZtoUV(const double X, const double Y, const double Z,
- double &U, double &V,
- const double relax) const;
+ double &U, double &V, const double relax,
+ bool onSurface=true) const;
// The bounding box
virtual SBoundingBox3d bounds() const;
@@ -94,7 +94,7 @@ class GFace : public GEntity
// Return the parmater location on the face given a point in space
// that is on the face.
- virtual SPoint2 parFromPoint(const SPoint3 &) const;
+ virtual SPoint2 parFromPoint(const SPoint3 &) const;
// True if the parameter value is interior to the face.
virtual int containsParam(const SPoint2 &pt) const = 0;
diff --git a/Mesh/meshGFaceTransfinite.cpp b/Mesh/meshGFaceTransfinite.cpp
index 335b9e2a3a..833d9fbb59 100644
--- a/Mesh/meshGFaceTransfinite.cpp
+++ b/Mesh/meshGFaceTransfinite.cpp
@@ -1,4 +1,4 @@
-// $Id: meshGFaceTransfinite.cpp,v 1.10 2006-12-02 22:48:25 geuzaine Exp $
+// $Id: meshGFaceTransfinite.cpp,v 1.11 2006-12-03 00:35:56 geuzaine Exp $
//
// Copyright (C) 1997-2007 C. Geuzaine, J.-F. Remacle
//
@@ -221,9 +221,8 @@ int MeshTransfiniteSurface( GFace *gf)
double zp = TRAN_TRI(m_vertices[iP1]->z(), m_vertices[iP2]->z(),
m_vertices[iP3]->z(), m_vertices[N1]->z(),
m_vertices[N2]->z(), m_vertices[N3]->z(), u, v);
- SPoint2 param = gf->parFromPoint(SPoint3(xp, yp, zp));
- double Up = param.x();
- double Vp = param.y();
+ double Up, Vp;
+ gf->XYZtoUV(xp, yp, zp, Up, Vp, 1.0, false);
#endif
GPoint gp = gf->point(SPoint2(Up, Vp));
MFaceVertex *newv = new MFaceVertex(gp.x(), gp.y(), gp.z(), gf, Up, Vp);
--
GitLab