From adf28345b1389d15a9527359fce380eddec5aeac Mon Sep 17 00:00:00 2001
From: Gabriel Ozouf <gabriel.ozouf@numworks.com>
Date: Fri, 13 Nov 2020 10:36:02 +0100
Subject: [PATCH] [poincare/zoom] Reduce zoom artifact

Do not use the bounds of the interval when computing a refined range.
As the bounds are often integers, the zoom would give strange result on
some non-continuous functions (e.g. f(x) = x!).

Change-Id: Ie127fe15191cb3951cff223adc8dc3172188c789
---
 poincare/src/zoom.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/poincare/src/zoom.cpp b/poincare/src/zoom.cpp
index 5569c9ec2..eb8a91428 100644
--- a/poincare/src/zoom.cpp
+++ b/poincare/src/zoom.cpp
@@ -183,7 +183,7 @@ void Zoom::RefinedYRangeForDisplay(ValueAtAbscissa evaluation, float xMin, float
   float sum = 0.f;
   int pop = 0;
 
-  for (int i = 1; i < sampleSize; i++) {
+  for (int i = 1; i < sampleSize - 1; i++) {
     x = xMin + i * step;
     y = evaluation(x, context, auxiliary);
     if (!std::isfinite(y)) {