From a8ff8b64dc4d4bea9ec620920639440496dfcba0 Mon Sep 17 00:00:00 2001
From: Jacques Lucke <jacques@blender.org>
Date: Wed, 8 Jul 2020 14:40:34 +0200
Subject: BLI: add comparison operators and hash functions for float3, etc.

---
 source/blender/blenlib/BLI_float3.hh | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'source/blender/blenlib/BLI_float3.hh')

diff --git a/source/blender/blenlib/BLI_float3.hh b/source/blender/blenlib/BLI_float3.hh
index 0edee600ef6..a36cedad41d 100644
--- a/source/blender/blenlib/BLI_float3.hh
+++ b/source/blender/blenlib/BLI_float3.hh
@@ -128,6 +128,16 @@ struct float3 {
     return stream;
   }
 
+  friend bool operator==(const float3 &a, const float3 &b)
+  {
+    return a.x == b.x && a.y == b.y && a.z == b.z;
+  }
+
+  friend bool operator!=(const float3 &a, const float3 &b)
+  {
+    return !(a == b);
+  }
+
   float normalize_and_get_length()
   {
     return normalize_v3(*this);
@@ -178,6 +188,14 @@ struct float3 {
     z = -z;
   }
 
+  uint32_t hash() const
+  {
+    uint32_t x1 = *(uint32_t *)&x;
+    uint32_t x2 = *(uint32_t *)&y;
+    uint32_t x3 = *(uint32_t *)&z;
+    return (x1 * 435109) ^ (x2 * 380867) ^ (x3 * 1059217);
+  }
+
   static float dot(const float3 &a, const float3 &b)
   {
     return a.x * b.x + a.y * b.y + a.z * b.z;
-- 
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