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Commit fa80be93 authored by Kirill Terekhov's avatar Kirill Terekhov
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Another fix to geometric algorithms

parent e639c57d
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Source/Mesh/geometry.cpp
View file @ fa80be93
......@@ -1099,6 +1099,8 @@ namespace INMOST
vec_diff(v1,cxf,l1,mdim);
vec_diff(v2,cxf,l2,mdim);
vec_cross_product(l1,l2,nt);
for(int q = 0; q < 3; ++q)
nt[q] *= 0.5;
ss = vec_dot_product(n0,nt,3);
if( ss ) ss /= fabs(ss);
at = sqrt(vec_dot_product(nt,nt,3))*ss;
......@@ -1123,10 +1125,11 @@ namespace INMOST
rev = CreatePrivateMarker();
FacesOrientation(faces,rev);
}
real vol = 0, a, at;
real vol = 0, a, at, volp;
real x[3] = {0,0,0}, n[3] = {0,0,0}, n0[3] = {0,0,0}, s, ss;
real l1[3] = {0,0,0}, l2[3] = {0,0,0};
real nt[3] = {0,0,0}, cxf[3] = {0,0,0};
real vc[3] = {0,0,0};
//me.Centroid(cx);
//if( print ) std::cout << "cx: " << cx[0] << " " << cx[1] << " " << cx[2] << std::endl;
for(unsigned j = 0; j < faces.size(); j++)
......@@ -1141,13 +1144,8 @@ namespace INMOST
n[0] = n[1] = n[2] = 0;
n0[0] = n0[1] = n0[2] = 0;
cxf[0] = cxf[1] = cxf[2] = 0;
vc[0] = vc[1] = vc[2] = 0;
a = 0;
//real_array v0 = nodes[0].Coords();
//real_array v1 = nodes[1].Coords();
//real_array v2 = nodes[2].Coords();
//vec_diff(v1,v0,l1,mdim);
//vec_diff(v2,v0,l2,mdim);
//vec_cross_product(l1,l2,n0);
real_array /*v0 = nodes[0].Coords(),*/ v1, v2;
faces[j].Centroid(cxf);
for(int i = 0; i < (int)nodes.size(); i++)
......@@ -1157,11 +1155,9 @@ namespace INMOST
vec_diff(v1,cxf,l1,mdim);
vec_diff(v2,cxf,l2,mdim);
vec_cross_product(l1,l2,nt);
//if( print ) std::cout << "nt: " << nt[0] << " " << nt[1] << " " << nt[2] << std::endl;
for(int q = 0; q < 3; ++q)
n0[q] += nt[q]*0.5;
}
//if( print ) std::cout << "n0: " << n0[0] << " " << n0[1] << " " << n0[2] << std::endl;
for(int k = 0; k < (int)nodes.size(); k++)
{
v1 = nodes[k].Coords();
......@@ -1174,7 +1170,6 @@ namespace INMOST
ss = vec_dot_product(n0,nt,3);
if( ss ) ss /= fabs(ss);
at = sqrt(vec_dot_product(nt,nt,3))*ss;
//if( print ) std::cout << "nt: " << nt[0] << " " << nt[1] << " " << nt[2] << " ss " << ss << " at " << at << std::endl;
//same as faces[j].Normal(n)
for(int q = 0; q < 3; ++q)
n[q] += nt[q];
......@@ -1183,33 +1178,22 @@ namespace INMOST
x[q] += at*(/*(v0[q]-cx[q])+*/(v1[q]-cxf[q])+(v2[q]-cxf[q]))/3.0;
a += at;
}
//if( print ) std::cout << "n: " << n[0] << " " << n[1] << " " << n[2] << std::endl;
//if( print ) std::cout << "x: " << x[0] << " " << x[1] << " " << x[2] << " a " << a << std::endl;
if( a )
{
//~ std::cout << "Correction: " << x[0]/a << " " << x[1]/a << " " << x[2]/a << " area " << a << std::endl;
for(int q = 0; q < 3; ++q)
x[q] = x[q]/a + cxf[q];
//~ std::cout << "Centroid: " << cxf[0] << " " << cxf[1] << " " << cxf[2] << std::endl;
//~ std::cout << "Barycenter: " << x[0] << " " << x[1] << " " << x[2] << std::endl;
}
else for(int q = 0; q < 3; ++q) x[q] = cxf[q];
vol += s*vec_dot_product(x,n,3);
volp = vec_dot_product(x,n,3) / 3.0;
vol += s*volp;
}
//if( print ) std::cout << "vol: " << vol << std::endl;
if( ornt )
{
if( vol < 0.0 ) vol = -vol;
faces.RemPrivateMarker(rev);
ReleasePrivateMarker(rev);
}
*ret = vol/3.0;
//if( *ret < 0 || *ret != *ret )
//{
// std::cout << "volume is " << *ret << std::endl;
// print = true;
// goto redo;
//}
*ret = vol;
break;
}
}
......@@ -1270,12 +1254,6 @@ namespace INMOST
*ret = 0;
real nt[3] = {0,0,0}, l1[3] = {0,0,0}, l2[3] = {0,0,0};
real c[3] = {0,0,0}, n0[3] = {0,0,0}, ss, cxf[3] = {0,0,0};
//real_array v0 = nodes[0].Coords();
//real_array v1 = nodes[1].Coords();
//real_array v2 = nodes[2].Coords();
//vec_diff(v1,v0,l1,mdim);
//vec_diff(v2,v0,l2,mdim);
//vec_cross_product(l1,l2,n0);
real_array v0 = nodes[0].Coords(), v1, v2;
Element(this,e).Centroid(cxf);
for(int i = 0; i < (int)nodes.size(); i++)
......@@ -1296,9 +1274,11 @@ namespace INMOST
vec_diff(v1,cxf,l1,mdim);
vec_diff(v2,cxf,l2,mdim);
vec_cross_product(l1,l2,nt);
for(int q = 0; q < 3; ++q)
nt[q] *= 0.5;
ss = vec_dot_product(n0,nt,3);
if( ss ) ss /= fabs(ss);
at = sqrt(vec_dot_product(nt,nt,3))*0.5*ss;
at = sqrt(vec_dot_product(nt,nt,3))*ss;
for(int q = 0; q < mdim; ++q)
c[q] += at*(/*(v0[q]-cxf[q])+*/(v1[q]-cxf[q])+(v2[q]-cxf[q]))/3.0;
a += at;
......@@ -1309,7 +1289,6 @@ namespace INMOST
ret[q] = c[q]/a+cxf[q];
} else for(int q = 0; q < mdim; ++q) ret[q] = cxf[q];
}
//std::cout << ret[0] << " " << ret[1] << " " << ret[2] << std::endl;
}
else if( edim == 3 )
{
......@@ -1322,12 +1301,13 @@ namespace INMOST
rev = CreatePrivateMarker();
FacesOrientation(faces,rev);
}
real vol = 0, a, at;
real vol = 0, a, at, volp;
real x[3] = {0,0,0}, nt[3] = {0,0,0}, s;
real c[3] = {0,0,0}, n[3] = {0,0,0};
real n0[3] = {0,0,0}, ss;
real l1[3] = {0,0,0}, l2[3] = {0,0,0};
real cx[3] = {0,0,0}, cxf[3] = {0,0,0};
real vc[3] = {0,0,0};
me.Centroid(cx);
for(unsigned j = 0; j < faces.size(); j++)
{
......@@ -1337,16 +1317,11 @@ namespace INMOST
s = faces[j].GetPrivateMarker(rev) ? -1.0 : 1.0;
else
s = faces[j].FaceOrientedOutside(me) ? 1.0 : -1.0;
//real_array v0 = nodes[0].Coords();
//real_array v1 = nodes[1].Coords();
//real_array v2 = nodes[2].Coords();
//vec_diff(v1,v0,l1,mdim);
//vec_diff(v2,v0,l2,mdim);
//vec_cross_product(l1,l2,n0);
n0[0] = n0[1] = n0[2] = 0;
x[0] = x[1] = x[2] = 0;
n[0] = n[1] = n[2] = 0;
cxf[0] = cxf[1] = cxf[2] = 0;
vc[0] = vc[1] = vc[2] = 0;
a = 0;
real_array /*v0 = nodes[0].Coords(),*/ v1, v2;
faces[j].Centroid(cxf);
......@@ -1379,16 +1354,17 @@ namespace INMOST
for(int q = 0; q < 3; ++q)
x[q] += at*(/*(v0[q]-cxf[q])+*/(v1[q]-cxf[q])+(v2[q]-cxf[q]))/3.0;
a += at;
//second-order midpoint formula
for(int q = 0; q < 3; ++q)
c[q] += s*nt[q]*(pow((/*v0*/cxf[q]-cx[q])+(v1[q]-cx[q]),2)+pow((/*v0*/cxf[q]-cx[q])+(v2[q]-cx[q]),2)+pow((v1[q]-cx[q])+(v2[q]-cx[q]),2))/24.0;
}
if( a )
{
for(int q = 0; q < 3; ++q)
x[q] = x[q]/a + cxf[q];
} else for(int q = 0; q < 3; ++q) x[q] = cxf[q];
vol += s*vec_dot_product(x,n,3);
vec_diff(x,cx,vc,3);
volp = vec_dot_product(vc,n,3) / 3.0;
for(int q = 0; q < 3; ++q)
c[q] += 0.75*(x[q]-cx[q])*s*volp; // x - base barycenter, cx - apex
vol += s*volp;
}
if( ornt )
{
......@@ -1401,7 +1377,6 @@ namespace INMOST
faces.RemPrivateMarker(rev);
ReleasePrivateMarker(rev);
}
vol /= 3.0;
if( vol )
{
for(int q = 0; q < mdim; ++q)
......
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