From 98ec8456931f20c91e6bc6675eacfc4ee538cf25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 17 Jan 2018 11:03:00 +0100
Subject: [PATCH] [apps] Graph: cheat for extremum on 0

---
 apps/graph/cartesian_function.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/apps/graph/cartesian_function.cpp b/apps/graph/cartesian_function.cpp
index f033c6935..b2d56b274 100644
--- a/apps/graph/cartesian_function.cpp
+++ b/apps/graph/cartesian_function.cpp
@@ -63,6 +63,11 @@ CartesianFunction::Point CartesianFunction::nextMinimumOfFunction(double start,
     result = brentAlgorithm(bracket[0], bracket[2], evaluate, context);
     x = bracket[1];
   } while (std::isnan(result.abscissa) && (step > 0.0 ? x <= max : x >= max));
+
+  if (std::fabs(result.abscissa) < 1E2*k_sqrtEps) {
+    result.abscissa = 0;
+    result.value = evaluate(this, 0, context);
+  }
   return result;
 }