From 7e70e071e9a0448edd1d78610af41e5a35cc5dac Mon Sep 17 00:00:00 2001
From: Arthur <arthur.tang@bambulab.com>
Date: Mon, 14 Aug 2023 18:05:22 +0800
Subject: [PATCH] FIX: loading stl with NaN points crashes

Avoid loading NaN points.

Jira: STUDIO-3889
Change-Id: I8c00f24e0ae1ba3b637e5d9bb13de93b1b4e77ba
(cherry picked from commit 0d244c7f65b913922ca4fad59d93fd80725f2e49)
---
 src/admesh/stlinit.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/admesh/stlinit.cpp b/src/admesh/stlinit.cpp
index f1be4ac77c..095f7f715a 100644
--- a/src/admesh/stlinit.cpp
+++ b/src/admesh/stlinit.cpp
@@ -237,7 +237,17 @@ static bool stl_read(stl_file *stl, FILE *fp, int first_facet, bool first, Impor
 		}
 #endif
 
-		// Write the facet into memory.
+		// Write the facet into memory if none of facet vertices is NAN.
+		bool someone_is_nan = false;
+		for (size_t j = 0; j < 3; ++j) {
+			if (isnan(facet.vertex[j](0)) || isnan(facet.vertex[j](1)) || isnan(facet.vertex[j](2))) { 
+				someone_is_nan = true;
+				break; 
+			}
+		}
+		if(someone_is_nan)
+            continue;
+
 		stl->facet_start[i] = facet;
 		stl_facet_stats(stl, facet, first);
   	}