Commit 6400a2a4 authored by andy's avatar andy
Browse files

ENH: Improved code comments for triangle intersection area calc

parent 76cf75f9
......@@ -53,9 +53,9 @@ void Foam::faceAreaIntersect::triSliceWithPlane
if (mag(d[i]) < matchTol*len)
{
d[i] = 0.0;
nCoPlanar++;
copI = i;
d[i] = 0.0;
}
else
{
......@@ -71,6 +71,9 @@ void Foam::faceAreaIntersect::triSliceWithPlane
}
}
// Determine triangle area contribution
if
(
(nPos == 3)
......@@ -78,6 +81,12 @@ void Foam::faceAreaIntersect::triSliceWithPlane
|| ((nPos == 1) && (nCoPlanar == 2)))
{
// all points above cutting plane - add triangle to list
// /\ _____
// / \ \ / /\
// /____\ \ / / \
// __________ ____v____ __/____\__
tris[nTris++] = tri;
}
else if ((nPos == 2) && (nCoPlanar == 0))
......@@ -85,6 +94,12 @@ void Foam::faceAreaIntersect::triSliceWithPlane
// 2 points above plane, 1 below
// resulting quad above plane split into 2 triangles
// ________
// \ /
// --\----/--
// \ /
// \/
// point under the plane
label i0 = negI;
......@@ -110,6 +125,11 @@ void Foam::faceAreaIntersect::triSliceWithPlane
{
// 1 point above plane, 2 below
// /\
// / \
// --/----\--
// /______\
// indices of remaining points
label i1 = d.fcIndex(i0);
label i2 = d.fcIndex(i1);
......@@ -126,6 +146,13 @@ void Foam::faceAreaIntersect::triSliceWithPlane
{
// 1 point above plane, 1 on plane, 1 below
// |\
// | \
// __|__\__
// | /
// | /
// |/
// point indices
label i1 = negI;
label i2 = copI;
......@@ -147,6 +174,13 @@ void Foam::faceAreaIntersect::triSliceWithPlane
else
{
// all points below cutting plane - forget
// _________ __________ ___________
// /\ \ /
// /\ / \ \ /
// / \ /____\ \/
// /____\
}
}
......
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