From a41860276372e05fdc841b9401663ed4c2632fb3 Mon Sep 17 00:00:00 2001
From: Gabriel Ozouf <gabriel.ozouf@numworks.com>
Date: Thu, 19 Nov 2020 11:31:41 +0100
Subject: [PATCH] [poincare/zoom] Remember points of interest when refining

Change-Id: I229cbffa2577d23bfa0a4c0632bc9ec32ae338e7
---
 poincare/src/zoom.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/poincare/src/zoom.cpp b/poincare/src/zoom.cpp
index 2b5ed19a1..5569c9ec2 100644
--- a/poincare/src/zoom.cpp
+++ b/poincare/src/zoom.cpp
@@ -208,8 +208,8 @@ void Zoom::RefinedYRangeForDisplay(ValueAtAbscissa evaluation, float xMin, float
     float bound = std::exp(sum / pop + 1.f);
     sampleYMin = std::max(sampleYMin, - bound);
     sampleYMax = std::min(sampleYMax, bound);
-    *yMin = sampleYMin;
-    *yMax = sampleYMax;
+    *yMin = std::min(*yMin, sampleYMin);
+    *yMax = std::max(*yMax, sampleYMax);
   }
   /* Round out the smallest bound to 0 if it is negligible compare to the
    * other one. This way, we can display the X axis for positive functions such