From: Juhu <5894800-Juhu_@users.noreply.gitlab.com>
Date: Thu, 23 May 2024 19:14:31 +0000 (+0200)
Subject: unhardcoded PI related constants in util.qc
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=4772db0b12cd0660032e1fd1f6f37c68846ba256;p=xonotic%2Fxonotic-data.pk3dir.git

unhardcoded PI related constants in util.qc

one digit in hardcoded constant was off, change causes no actual difference when using single or double precision floats
---

diff --git a/qcsrc/common/util.qc b/qcsrc/common/util.qc
index ca120d295..fca4c32f6 100644
--- a/qcsrc/common/util.qc
+++ b/qcsrc/common/util.qc
@@ -457,8 +457,8 @@ vector decompressShortVector(int data)
 	}
 	else
 	{
-		q = .19634954084936207740 * q;
-		p = .19634954084936207740 * p - 1.57079632679489661922;
+		q = M_PI_16 * q;
+		p = M_PI_16 * p - M_PI_2;
 		out.x = cos(q) *  cos(p);
 		out.y = sin(q) *  cos(p);
 		out.z =          -sin(p);
diff --git a/qcsrc/lib/warpzone/mathlib.qh b/qcsrc/lib/warpzone/mathlib.qh
index f5d8f63e7..11517d909 100644
--- a/qcsrc/lib/warpzone/mathlib.qh
+++ b/qcsrc/lib/warpzone/mathlib.qh
@@ -108,6 +108,7 @@ const float M_LN10     = 2.30258509299404568402;  /* log_e 10 */
 #define M_PI             3.14159265358979323846   /* pi */
 const float M_PI_2     = 1.57079632679489661923;  /* pi/2 */
 const float M_PI_4     = 0.78539816339744830962;  /* pi/4 */
+const float M_PI_16    = 0.19634954084936207740;  /* pi/16 */
 const float M_1_PI     = 0.31830988618379067154;  /* 1/pi */
 const float M_2_PI     = 0.63661977236758134308;  /* 2/pi */
 const float M_2_SQRTPI = 1.12837916709551257390;  /* 2/sqrt(pi) */