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-rw-r--r--hlsl/artwork_support/post.fx1
1 files changed, 1 insertions, 0 deletions
diff --git a/hlsl/artwork_support/post.fx b/hlsl/artwork_support/post.fx
index f0c883fa69e..9a3b693cd61 100644
--- a/hlsl/artwork_support/post.fx
+++ b/hlsl/artwork_support/post.fx
@@ -66,6 +66,7 @@ struct PS_INPUT
static const float Epsilon = 1.0e-7f;
static const float PI = 3.1415927f;
+static const float PHI = 1.618034f;
static const float E = 2.7182817f;
static const float Gelfond = 23.140692f; // e^pi (Gelfond constant)
static const float GelfondSchneider = 2.6651442f; // 2^sqrt(2) (Gelfond-Schneider constant)