From 30279f701c2e1bc976b5e91d67c52a8de1191ebe Mon Sep 17 00:00:00 2001
From: Roy Stogner <Roy.Stogner@inl.gov>
Date: Wed, 16 Mar 2022 08:35:34 -0500
Subject: [PATCH] Use std::fpclassify for double==0 tests

---
 poly2tri/common/utils.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/poly2tri/common/utils.h b/poly2tri/common/utils.h
index 1479fb5..6a20a00 100644
--- a/poly2tri/common/utils.h
+++ b/poly2tri/common/utils.h
@@ -71,7 +71,8 @@ Orientation Orient2d(const Point& pa, const Point& pb, const Point& pc)
 
 // Using a tolerance here fails on concave-by-subepsilon boundaries
 //   if (val > -EPSILON && val < EPSILON) {
-  if (val == 0) {
+// Using == on double makes -Wfloat-equal warnings yell at us
+  if (std::fpclassify(val) == FP_ZERO) {
     return COLLINEAR;
   } else if (val > 0) {
     return CCW;