Added a comment for last commit

2017-05-31 19:24:33 +02:00
parent 95f3eaf001
commit 40ee591474
1 changed files with 2 additions and 0 deletions
--- a/rtengine/diagonalcurves.cc
+++ b/rtengine/diagonalcurves.cc
@@ -59,6 +59,8 @@ DiagonalCurve::DiagonalCurve (const std::vector<double>& p, int poly_pn)
                y[i] = p[ix++];

                if (std::fabs(x[i] - y[i]) >= 0.000009) {
+                    // the smallest possible difference between x and y curve point values is ~ 0.00001
+                    // checking against >= 0.000009 is a bit saver than checking against >= 0.00001
                    identity = false;
                }
            }