From 4d6dd80257037921ba9dfe2b01c0fa0dadb98806 Mon Sep 17 00:00:00 2001
From: Kim Kulling <kimkulling@users.noreply.github.com>
Date: Thu, 22 Feb 2024 13:58:25 +0100
Subject: [PATCH] Add correct double zero check (#5471)

* Add correct double zero check

* Use std::fpclassify
---
 code/AssetLib/FBX/FBXExporter.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/code/AssetLib/FBX/FBXExporter.cpp b/code/AssetLib/FBX/FBXExporter.cpp
index 7527d3fc7..50daf7996 100644
--- a/code/AssetLib/FBX/FBXExporter.cpp
+++ b/code/AssetLib/FBX/FBXExporter.cpp
@@ -69,6 +69,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <unordered_set>
 #include <utility>
 #include <vector>
+#include <cmath>
 
 // RESOURCES:
 // https://code.blender.org/2013/08/fbx-binary-file-format-specification/
@@ -1062,7 +1063,7 @@ aiMatrix4x4 get_world_transform(const aiNode* node, const aiScene* scene)
 }
 
 inline int64_t to_ktime(double ticks, const aiAnimation* anim) {
-    if (anim->mTicksPerSecond <= 0) {
+    if (FP_ZERO == std::fpclassify(anim->mTicksPerSecond)) {    
         return static_cast<int64_t>(ticks) * FBX::SECOND;
     }
     return (static_cast<int64_t>(ticks / anim->mTicksPerSecond)) * FBX::SECOND;