From f62204718bf8efc1661fd61cf85d24bc8268f763 Mon Sep 17 00:00:00 2001
From: Jacques Lucke <jacques@blender.org>
Date: Fri, 10 Jul 2020 12:53:50 +0200
Subject: BLI: initial hash function for Color4b and float4x4

---
 source/blender/blenlib/BLI_float4x4.hh | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'source/blender/blenlib/BLI_float4x4.hh')

diff --git a/source/blender/blenlib/BLI_float4x4.hh b/source/blender/blenlib/BLI_float4x4.hh
index 1e9bd12b12b..ef83f9ffc19 100644
--- a/source/blender/blenlib/BLI_float4x4.hh
+++ b/source/blender/blenlib/BLI_float4x4.hh
@@ -108,6 +108,16 @@ struct float4x4 {
     interp_m4_m4m4(result, a.values, b.values, t);
     return result;
   }
+
+  uint32_t hash() const
+  {
+    uint32_t h = 435109;
+    for (uint i = 0; i < 16; i++) {
+      float value = ((const float *)this)[i];
+      h = h * 33 + (*(uint32_t *)&value);
+    }
+    return h;
+  }
 };
 
 }  // namespace blender
-- 
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