From ba35d6e3d4ce88a0493a8c93c8747294fd68a2d1 Mon Sep 17 00:00:00 2001
From: David Vazgenovich Shakaryan <dvshakaryan@gmail.com>
Date: Tue, 26 Apr 2022 18:10:20 -0700
Subject: web: prevent stdev from being set to NaN

---
 web/dartboat_wasm.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/web/dartboat_wasm.c b/web/dartboat_wasm.c
index f8a076d..bc384dc 100644
--- a/web/dartboat_wasm.c
+++ b/web/dartboat_wasm.c
@@ -1,6 +1,7 @@
 #include "checkouts.h"
 #include "comp.h"
 
+#include <math.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
@@ -448,8 +449,10 @@ EMSCRIPTEN_KEEPALIVE void set_delay(int delay)
 
 EMSCRIPTEN_KEEPALIVE void set_stdev(float hstdev, float vstdev)
 {
-	horizontal_stdev = hstdev;
-	vertical_stdev = vstdev;
+	if (!isnan(hstdev))
+		horizontal_stdev = hstdev;
+	if (!isnan(vstdev))
+		vertical_stdev = vstdev;
 }
 
 void init_boat()
-- 
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