OilfieldToolsNet/LBPM
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

added Ji

Browse Source
This commit is contained in:
James E McClure
2018-09-11 20:43:35 -04:00
parent bcdf4ebf15
commit 050c5ea16c
1 changed files with 7 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
analysis/Minkowski.cpp
View File

@@ -180,6 +180,7 @@ void Minkowski::ComputeScalar(const DoubleArray Field, const double isovalue)
Point P1,P2,P3;
unsigned long int e1,e2,e3;
double s,s1,s2,s3;
double a1,a2,a3;
double Vx,Vy,Vz,Wx,Wy,Wz,nx,ny,nz,norm;
//int Nx = Field.size(0);
//int Ny = Field.size(1);
@@ -195,26 +196,17 @@ void Minkowski::ComputeScalar(const DoubleArray Field, const double isovalue)
P1 = object.vertex.coords(object.halfedge.v1(e1));
P2 = object.vertex.coords(object.halfedge.v1(e2));
P3 = object.vertex.coords(object.halfedge.v1(e3));
// compute the area
// Surface area
s1 = sqrt((P1.x-P2.x)*(P1.x-P2.x)+(P1.y-P2.y)*(P1.y-P2.y)+(P1.z-P2.z)*(P1.z-P2.z));
s2 = sqrt((P1.x-P3.x)*(P1.x-P3.x)+(P1.y-P3.y)*(P1.y-P3.y)+(P1.z-P3.z)*(P1.z-P3.z));
s3 = sqrt((P2.x-P3.x)*(P2.x-P3.x)+(P2.y-P3.y)*(P2.y-P3.y)+(P2.z-P3.z)*(P2.z-P3.z));
s = 0.5*(s1+s2+s3);
Ai += sqrt(s*(s-s1)*(s-s2)*(s-s3));
// compute the normal vector
Vx=P2.x-P1.x;
Vy=P2.y-P1.y;
Vz=P2.z-P1.z;
Wx=P3.x-P2.x;
Wy=P3.y-P2.y;
Wz=P3.z-P2.z;
nx = Vy*Wz-Vz*Wy;
ny = Vz*Wx-Vx*Wz;
nz = Vx*Wy-Vy*Wx;
norm = 1.f/sqrt(nx*nx+ny*ny+nz*nz);
nx *= norm;
ny *= norm;
nz *= norm;
// Mean curvature based on half edge angle
a1 = object.EdgeAngle(e1);
a2 = object.EdgeAngle(e2);
a3 = object.EdgeAngle(e3);
Ji += 0.08333333333333*(a1*s1+a2*s2+a3*s3);
// Euler characteristic (half edge rule: one face - 0.5*(three edges))
Xi -= 0.5;
}