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Commit 5a69bf6c authored by Kirill Terekhov's avatar Kirill Terekhov
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More robust (and more expensive) algorithms for geometry

parent d52518bb
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Source/Mesh/geometry.cpp
View file @ 5a69bf6c
......@@ -877,12 +877,23 @@ namespace INMOST
{
*ret = 0;
real nt[3] = {0,0,0}, l1[3] = {0,0,0}, l2[3] = {0,0,0},n0[3] = {0,0,0}, ss;
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();
//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;
for(int i = 1; i < (int)nodes.size()-1; i++)
{
v1 = nodes[i].Coords();
v2 = nodes[i+1].Coords();
vec_diff(v1,v0,l1,mdim);
vec_diff(v2,v0,l2,mdim);
vec_cross_product(l1,l2,nt);
for(int q = 0; q < 3; ++q)
n0[q] += nt[q]*0.5;
}
for(int i = 1; i < (int)nodes.size()-1; i++)
{
v1 = nodes[i].Coords();
......@@ -891,9 +902,10 @@ namespace INMOST
vec_diff(v2,v0,l2,mdim);
vec_cross_product(l1,l2,nt);
ss = vec_dot_product(n0,nt,3);
ss /= fabs(ss);
if( ss ) ss /= fabs(ss);
*ret += sqrt(vec_dot_product(nt,nt,3))*0.5*ss;
}
if( *ret != *ret ) std::cout << "area is nan" << std::endl;
*ret = fabs(*ret);
} else *ret = 0;
//~ if( isnan(*ret) || fabs(*ret) < 1e-15 ) throw -1;
......@@ -901,7 +913,8 @@ namespace INMOST
}
case 3: //volume of cell
{
//bool print = false;
//redo:
Cell me = Cell(this,e);
ElementArray<Face> faces = me->getFaces();
bool ornt = true;//!HaveGeometricData(ORIENTATION,FACE);
......@@ -916,6 +929,7 @@ namespace INMOST
real l1[3] = {0,0,0}, l2[3] = {0,0,0};
real nt[3] = {0,0,0}, cx[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++)
{
//compute normal to face
......@@ -926,13 +940,27 @@ namespace INMOST
s = faces[j].FaceOrientedOutside(me) ? 1.0 : -1.0;
x[0] = x[1] = x[2] = 0;
n[0] = n[1] = n[2] = 0;
n0[0] = n0[1] = n0[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();
//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;
for(int i = 1; i < (int)nodes.size()-1; i++)
{
v1 = nodes[i].Coords();
v2 = nodes[i+1].Coords();
vec_diff(v1,v0,l1,mdim);
vec_diff(v2,v0,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 = 1; k < (int)nodes.size()-1; k++)
{
v1 = nodes[k+0].Coords();
......@@ -942,8 +970,9 @@ namespace INMOST
vec_cross_product(l1,l2,nt);
for(int q = 0; q < 3; ++q) nt[q] *= 0.5;
ss = vec_dot_product(n0,nt,3);
ss /= fabs(ss);
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];
......@@ -952,9 +981,12 @@ namespace INMOST
x[q] += at*((v0[q]-cx[q])+(v1[q]-cx[q])+(v2[q]-cx[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;
for(int q = 0; q < 3; ++q) x[q] /= a;
vol += s*vec_dot_product(x,n,3);
}
//if( print ) std::cout << "vol: " << vol << std::endl;
if( ornt )
{
if( vol < 0.0 ) vol = -vol;
......@@ -962,6 +994,12 @@ namespace INMOST
ReleasePrivateMarker(rev);
}
*ret = vol/3.0;
//if( *ret < 0 || *ret != *ret )
//{
// std::cout << "volume is " << *ret << std::endl;
// print = true;
// goto redo;
//}
break;
}
}
......@@ -1022,12 +1060,23 @@ 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, cx[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();
//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;
for(int i = 1; i < (int)nodes.size()-1; i++)
{
v1 = nodes[i].Coords();
v2 = nodes[i+1].Coords();
vec_diff(v1,v0,l1,mdim);
vec_diff(v2,v0,l2,mdim);
vec_cross_product(l1,l2,nt);
for(int q = 0; q < 3; ++q)
n0[q] += nt[q]*0.5;
}
real a = 0, at;
Element(this,e).Centroid(cx);
for(int i = 1; i < (int)nodes.size()-1; i++)
......@@ -1038,7 +1087,7 @@ namespace INMOST
vec_diff(v2,v0,l2,mdim);
vec_cross_product(l1,l2,nt);
ss = vec_dot_product(n0,nt,3);
ss /= fabs(ss);
if( ss ) ss /= fabs(ss);
at = sqrt(vec_dot_product(nt,nt,3))*0.5*ss;
for(int q = 0; q < mdim; ++q)
c[q] += at*((v0[q]-cx[q])+(v1[q]-cx[q])+(v2[q]-cx[q]))/3.0;
......@@ -1074,15 +1123,27 @@ 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);
//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;
a = 0;
real_array v0 = nodes[0].Coords(), v1, v2;
for(int i = 1; i < (int)nodes.size()-1; i++)
{
v1 = nodes[i].Coords();
v2 = nodes[i+1].Coords();
vec_diff(v1,v0,l1,mdim);
vec_diff(v2,v0,l2,mdim);
vec_cross_product(l1,l2,nt);
for(int q = 0; q < 3; ++q)
n0[q] += nt[q]*0.5;
}
for(int i = 1; i < (int)nodes.size()-1; i++)
{
real_array v1 = nodes[i].Coords();
......@@ -1093,7 +1154,7 @@ namespace INMOST
for(int q = 0; q < 3; ++q)
nt[q] *= 0.5;
ss = vec_dot_product(n0,nt,3);
ss /= fabs(ss);
if( ss ) ss /= fabs(ss);
at = sqrt(vec_dot_product(nt,nt,3))*ss;
//same as faces[j].Normal(n)
for(int q = 0; q < 3; ++q)
......@@ -1121,8 +1182,12 @@ namespace INMOST
ReleasePrivateMarker(rev);
}
vol /= 3.0;
for(int q = 0; q < mdim; ++q)
ret[q] = c[q]/(vol) + cx[q];
if( vol )
{
for(int q = 0; q < mdim; ++q)
ret[q] = c[q]/(vol) + cx[q];
}
else for(int q = 0; q < mdim; ++q) ret[q] = cx[q];
//std::cout << ret[0] << " " << ret[1] << " " << ret[2] << std::endl;
}
}
......
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