void CreateSnappedPlanes()
{
firstSnappedPlanes = new CSGPlane[firstSnappedEdges.Length / 2];
for (int i = 0; i < firstSnappedEdges.Length; i += 2)
{
var point0 = firstSnappedEdges[i + 0];
var point1 = firstSnappedEdges[i + 1];
var binormal = (point1 - point0).normalized;
var tangent = buildPlane.normal;
var normal = Vector3.Cross(binormal, tangent);
var worldPlane = new CSGPlane(normal, point0);
// note, we use 'inverse' of the worldToLocalMatrix because to transform a plane we'd need to do an inverse,
// and using the already inversed matrix we don't need to do a costly inverse.
var localPlane = GeometryUtility.InverseTransformPlane(firstSnappedBrush.transform.localToWorldMatrix, worldPlane);
var vertices = firstSnappedBrush.ControlMesh.Vertices;
var planeIsInversed = false;
for (int v = 0; v < vertices.Length; v++)
{
if (localPlane.Distance(vertices[v]) > MathConstants.DistanceEpsilon)
{
planeIsInversed = true;
break;
}
}
if (planeIsInversed)
firstSnappedPlanes[i / 2] = worldPlane.Negated();
else
firstSnappedPlanes[i / 2] = worldPlane;
}
}
