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smesh/src/SMESHGUI/SMESHGUI_ComputeScalarValue.cxx
yfr 64ae2f71de yfr : merge 1.2
2003-07-10 13:18:22 +00:00

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// SMESH SMESHGUI : GUI for SMESH component
//
// Copyright (C) 2003 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
//
//
//
// File : SMESHGUI_ComputeScalarValue.cxx
// Author : Nicolas REJNERI
// Module : SMESH
// $Header$
using namespace std;
#include "SMESHGUI_ComputeScalarValue.h"
#include "utilities.h"
#include <math.h>
//=============================================================================
/*!
*
*/
//=============================================================================
static double ComputeLength(float* p1, float* p2) {
float a1,a2,a3,b1,b2,b3;
a1 = p1[0];
a2 = p1[1];
a3 = p1[2];
b1 = p2[0];
b2 = p2[1];
b3 = p2[2];
// MESSAGE( a1 << " "<< a2 << " "<< a3 << " " << b1 << " "<< b2 << " "<< b3 );
float X1,Y1,Z1,X2,Z2,Y2;
X1 = b1 - a1;
Y1 = b2 - a2;
Z1 = b3 - a3;
// MESSAGE( X1 << " "<< Y1 << " "<< Z1 );
float e1;
e1 = sqrt( X1*X1 + Y1*Y1 + Z1*Z1 ) ;
// MESSAGE( "Length = " << e1 );
return e1;
}
//=============================================================================
/*!
*
*/
//=============================================================================
double SMESHGUI_ComputeScalarValue::LengthEdges(vtkCell* theCell) {
int num_points = theCell->GetNumberOfPoints ();
vtkPoints* points = theCell->GetPoints();
if (num_points != 2 ) return 0;
float* pnt1 = points->GetPoint(0);
float* pnt2 = points->GetPoint(1);
return ComputeLength(pnt1,pnt2);
};
//=============================================================================
/*!
*
*/
//=============================================================================
static double ComputeAreaOfTriangle(float* p1, float* p2, float* p3) {
double a1,a2,a3,b1,b2,b3,c1,c2,c3;
a1 = p1[0];
a2 = p1[1];
a3 = p1[2];
b1 = p2[0];
b2 = p2[1];
b3 = p2[2];
c1 = p3[0];
c2 = p3[1];
c3 = p3[2];
float e1, e2, e3;
e1 = sqrt( (a1-b1)*(a1-b1) + (a2-b2)*(a2-b2) + (a3-b3)*(a3-b3) ) ;
e2 = sqrt( (b1-c1)*(b1-c1) + (b2-c2)*(b2-c2) + (b3-c3)*(b3-c3) ) ;
e3 = sqrt( (c1-a1)*(c1-a1) + (c2-a2)*(c2-a2) + (c3-a3)*(c3-a3) ) ;
// MESSAGE( "e = " << e1 << " " << e2 <<" " << e3 );
float s = (e1+e2+e3)/2;
double area = sqrt(s*(s-e1)*(s-e2)*(s-e3));
// MESSAGE( "area = " << area );
return area;
}
//=============================================================================
/*!
*
*/
//=============================================================================
double SMESHGUI_ComputeScalarValue::AreaElements(vtkCell* theCell){
// MESSAGE ( " SMESHGUI_ComputeScalarValue::AreaElements " )
int num_points = theCell->GetNumberOfPoints ();
vtkPoints* points = theCell->GetPoints();
// MESSAGE( "num_points = "<< num_points );
for (int j = 0; j < theCell->GetNumberOfPoints (); j++) {
float* pnt = points->GetPoint(j);
// MESSAGE( pnt[0] << " " << pnt[1] << " " << pnt[2] );
}
if (num_points < 3 ) return 0;
if (num_points == 3) {
float* p1 = points->GetPoint(0);
float* p2 = points->GetPoint(1);
float* p3 = points->GetPoint(2);
double area = ComputeAreaOfTriangle(p1,p2,p3);
return area;
} else if (num_points == 4) {
float* p1 = points->GetPoint(0);
float* p2 = points->GetPoint(1);
float* p3 = points->GetPoint(2);
float* p4 = points->GetPoint(3);
double area1 = ComputeAreaOfTriangle(p1,p2,p3);
double area2 = ComputeAreaOfTriangle(p3,p4,p1);
return area1+area2;
}
};
//=============================================================================
/*!
*
*/
//=============================================================================
double SMESHGUI_ComputeScalarValue::Taper(vtkCell* theCell){
int num_points = theCell->GetNumberOfPoints ();
vtkPoints* points = theCell->GetPoints();
if (num_points != 4 ) return 0;
float* p1 = points->GetPoint(0);
float* p2 = points->GetPoint(1);
float* p3 = points->GetPoint(2);
float* p4 = points->GetPoint(3);
double A1 = ComputeAreaOfTriangle(p4,p1,p2);
double A2 = ComputeAreaOfTriangle(p3,p1,p2);
double A3 = ComputeAreaOfTriangle(p2,p3,p4);
double A4 = ComputeAreaOfTriangle(p3,p4,p1);
double JA = 0.25 * (A1 + A2 + A3 + A4);
double taper = fabs(A1/(JA-1));
if (fabs(A2/(JA-1)) > taper) taper = fabs(A2/(JA-1));
if (fabs(A3/(JA-1)) > taper) taper = fabs(A3/(JA-1));
if (fabs(A4/(JA-1)) > taper) taper = fabs(A4/(JA-1));
// MESSAGE( "Taper = " << taper);
return taper;
};
//=============================================================================
/*!
*
*/
//=============================================================================
double SMESHGUI_ComputeScalarValue::AspectRatio(vtkCell* theCell) {
int num_points = theCell->GetNumberOfPoints ();
vtkPoints* points = theCell->GetPoints();
if (num_points < 3 ) return 0;
if (num_points == 3) {
float a1,a2,a3,b1,b2,b3,c1,c2,c3;
float* pnt = points->GetPoint(0);
a1 = pnt[0];
a2 = pnt[1];
a3 = pnt[2];
pnt = points->GetPoint(1);
b1 = pnt[0];
b2 = pnt[1];
b3 = pnt[2];
pnt = points->GetPoint(2);
c1 = pnt[0];
c2 = pnt[1];
c3 = pnt[2];
float e1, e2, e3;
e1 = sqrt( (a1-b1)*(a1-b1) + (a2-b2)*(a2-b2) + (a3-b3)*(a3-b3) ) ;
e2 = sqrt( (b1-c1)*(b1-c1) + (b2-c2)*(b2-c2) + (b3-c3)*(b3-c3) ) ;
e3 = sqrt( (c1-a1)*(c1-a1) + (c2-a2)*(c2-a2) + (c3-a3)*(c3-a3) ) ;
float amax,p,s;
amax=e1;
if (e2>amax) amax=e2;
if (e3>amax) amax=e3;
p=(e1+e2+e3)/2;
s=AreaElements(theCell);
double aspectRatio=amax*p*sqrt(double(3))/(s*6);
// MESSAGE( "aspectRatio = " << aspectRatio );
return(aspectRatio);
}
else if (num_points == 4) {
float a1,a2,a3,b1,b2,b3,c1,c2,c3,d1,d2,d3;
float* pnt = points->GetPoint(0);
a1 = pnt[0];
a2 = pnt[1];
a3 = pnt[2];
pnt = points->GetPoint(1);
b1 = pnt[0];
b2 = pnt[1];
b3 = pnt[2];
pnt = points->GetPoint(2);
c1 = pnt[0];
c2 = pnt[1];
c3 = pnt[2];
pnt = points->GetPoint(3);
d1 = pnt[0];
d2 = pnt[1];
d3 = pnt[2];
float e1, e2, e3, e4;
float len_min, len_max;
e1 = sqrt( (a1-b1)*(a1-b1) + (a2-b2)*(a2-b2) + (a3-b3)*(a3-b3) ) ;
e2 = sqrt( (b1-c1)*(b1-c1) + (b2-c2)*(b2-c2) + (b3-c3)*(b3-c3) ) ;
e3 = sqrt( (c1-d1)*(c1-d1) + (c2-d2)*(c2-d2) + (c3-d3)*(c3-d3) ) ;
e4 = sqrt( (d1-a1)*(d1-a1) + (d2-a2)*(d2-a2) + (d3-a3)*(d3-a3) ) ;
len_min = e1; len_max = e1;
if (e2 >len_max ) len_max = e2;
if (e3 >len_max ) len_max = e3;
if (e4 >len_max ) len_max = e4;
if (e2 <len_min ) len_min = e2;
if (e3 <len_min ) len_min = e3;
if (e4 <len_min ) len_min = e4;
return (len_max/len_min);
}
};
//=============================================================================
/*!
*
*/
//=============================================================================
static double ComputeAngle(float* p1, float* p2, float* p3) {
const double pi=4*atan(double(1));
float a1,a2,a3,b1,b2,b3,c1,c2,c3;
a1 = p1[0];
a2 = p1[1];
a3 = p1[2];
b1 = p2[0];
b2 = p2[1];
b3 = p2[2];
c1 = p3[0];
c2 = p3[1];
c3 = p3[2];
float X1,Y1,Z1,X2,Z2,Y2;
X1 = b1 - a1;
X2 = c1 - b1;
Y1 = b2 - a2;
Y2 = c2 - b2;
Z1 = b3 - a3;
Z2 = c3 - b3;
float e1, e2, e3;
e1 = sqrt( X1*X1 + Y1*Y1 + Z1*Z1 ) ;
e2 = sqrt( X2*X2 + Y2*Y2 + Z2*Z2 ) ;
double dot=(X1*(X2)+Y1*(Y2)+Z1*(Z2));
// MESSAGE( pi );
// MESSAGE( dot/(e1*e2) );
double cosinus = dot/(e1*e2);
cosinus = fabs(cosinus);
return 180*acos (cosinus)/pi;
}
//=============================================================================
/*!
*
*/
//=============================================================================
double SMESHGUI_ComputeScalarValue::MinimumAngle(vtkCell* theCell) {
int num_points = theCell->GetNumberOfPoints ();
vtkPoints* points = theCell->GetPoints();
if (num_points < 3 ) return 0;
float* pnt1 = points->GetPoint(0);
float* pnt2 = points->GetPoint(1);
float* pnt3 = points->GetPoint(2);
if (num_points == 3) {
double a1,a2,a3,amin;
a1=fabs(ComputeAngle(pnt1,pnt2,pnt3));
amin=a1;
a2=fabs(ComputeAngle(pnt2,pnt3,pnt1));
if (a2<amin) amin=a2;
a3=fabs(ComputeAngle(pnt3,pnt1,pnt2));
if (a3<amin) amin=a3;
// MESSAGE( "Minimal angle " << amin );
return amin;
}
else if (num_points == 4) {
float* pnt4 = points->GetPoint(3);
double a1,a2,a3,a4,amin;
a1=fabs(ComputeAngle(pnt1,pnt2,pnt3));
amin=a1;
a2=fabs(ComputeAngle(pnt2,pnt3,pnt4));
if (a2<amin) amin=a2;
a3=fabs(ComputeAngle(pnt3,pnt4,pnt1));
if (a3<amin) amin=a3;
a4=fabs(ComputeAngle(pnt4,pnt1,pnt2));
if (a4<amin) amin=a4;
// MESSAGE( "Minimal angle " << amin );
return amin;
}
};
//=============================================================================
/*!
*
*/
//=============================================================================
double SMESHGUI_ComputeScalarValue::Skew(vtkCell* theCell) {
int num_points = theCell->GetNumberOfPoints ();
vtkPoints* points = theCell->GetPoints();
if (num_points < 3 ) return 0;
//triangle case
if (num_points == 3) {
float* pnt1 = points->GetPoint(0);
float* pnt2 = points->GetPoint(1);
float* pnt3 = points->GetPoint(2);
double a1,a2,a3,amax;
a1=fabs(60 - fabs(ComputeAngle(pnt1,pnt2,pnt3)));
amax=a1;
a2=fabs(60 - fabs(ComputeAngle(pnt2,pnt3,pnt1)));
if (a2>amax) amax=a2;
a3=fabs(60 - fabs(ComputeAngle(pnt3,pnt1,pnt2)));
if (a3>amax) amax=a3;
// MESSAGE( "Skew = " << amax );
return amax;
}
//quadrangle case
else if (num_points == 4) {
float* pnt1 = points->GetPoint(0);
float* pnt2 = points->GetPoint(1);
float* pnt3 = points->GetPoint(2);
float* pnt4 = points->GetPoint(3);
double a1,a2,a3,a4,amax;
a1=fabs(90 - fabs(ComputeAngle(pnt1,pnt2,pnt3)));
amax=a1;
a2=fabs(90 - fabs(ComputeAngle(pnt2,pnt3,pnt4)));
if (a2>amax) amax=a2;
a3=fabs(90 - fabs(ComputeAngle(pnt3,pnt4,pnt1)));
if (a3>amax) amax=a3;
a4=fabs(90 - fabs(ComputeAngle(pnt4,pnt1,pnt2)));
if (a4>amax) amax=a4;
// MESSAGE( "Skew = " << amax );
return amax;
}
};
//=============================================================================
/*!
*
*/
//=============================================================================
static double ComputeA(float* p1, float* p2, float* p3, float* G) {
double e1 = sqrt(pow(p2[0]-p1[0], 2)+pow(p2[1]-p1[1], 2)+pow(p2[2]-p1[2], 2));
double e2 = sqrt(pow(p3[0]-p2[0], 2)+pow(p3[1]-p2[1], 2)+pow(p3[2]-p2[2], 2));
double l;
if (e1 < e2) l = 0.5*e1;
else l = 0.5*e2;
float GI[3], GJ[3], N[3];;
GI[0] = (p2[0]-p1[0])/2-G[0];
GI[1] = (p2[1]-p1[1])/2-G[1];
GI[2] = (p2[2]-p1[2])/2-G[2];
GJ[0] = (p3[0]-p2[0])/2-G[0];
GJ[1] = (p3[1]-p2[1])/2-G[1];
GJ[2] = (p3[2]-p2[2])/2-G[2];
N[0] = GI[1]*GJ[2] - GI[2]*GJ[1];
N[1] = GI[2]*GJ[0] - GI[0]*GJ[2];
N[2] = GI[0]*GJ[1] - GI[1]*GJ[0];
double H;
float T[3];
T[0] = (p1[0]-G[0])*N[0];
T[1] = (p1[1]-G[1])*N[1];
T[2] = (p1[2]-G[2])*N[2];
H = sqrt(pow(T[0],2)+pow(T[1],2)+pow(T[2],2))/sqrt(pow(N[0],2)+pow(N[1],2)+pow(N[2],2));
double A = H/l;
return A;
}
//=============================================================================
/*!
*
*/
//=============================================================================
double SMESHGUI_ComputeScalarValue::Warp(vtkCell* theCell) {
int num_points = theCell->GetNumberOfPoints ();
vtkPoints* points = theCell->GetPoints();
if (num_points != 4 ) return 0;
float* p1 = points->GetPoint(0);
float* p2 = points->GetPoint(1);
float* p3 = points->GetPoint(2);
float* p4 = points->GetPoint(3);
double G1, G2, G3;
float G[3];
G[0] = (p1[0]+p2[0]+p3[0]+p4[0])/4;
G[1] = (p1[1]+p2[1]+p3[1]+p4[1])/4;
G[2] = (p1[2]+p2[2]+p3[2]+p4[2])/4;
double amax = ComputeA(p1, p2, p3, G);
double nextA = ComputeA(p2, p3, p4, G);
if (nextA > amax) amax = nextA;
nextA = ComputeA(p3, p4, p1, G);
if (nextA > amax) amax = nextA;
nextA = ComputeA(p4, p1, p2, G);
if (nextA > amax) amax = nextA;
// MESSAGE( "Warp = " << amax );
return amax;
}
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