X-Git-Url: http://git.xonotic.org/?a=blobdiff_plain;f=mathlib.h;h=b3a9f7ea3c319b80f01ab78d1c5b09e0eebeac7e;hb=13b389e18a2c98461fba000b9342c11d4efeb85e;hp=d8a902d4508746c93efdd6bab94cab85f83af8f8;hpb=f69dd60228f9846eb768b71790a00a2262cba028;p=xonotic%2Fdarkplaces.git

diff --git a/mathlib.h b/mathlib.h
index d8a902d4..b3a9f7ea 100644
--- a/mathlib.h
+++ b/mathlib.h
@@ -175,6 +175,10 @@ int PointInfrontOfTriangle(const float *p, const float *a, const float *b, const
 }
 #endif
 
+#define lhcheeserand() (seed = (seed * 987211u) ^ (seed >> 13u) ^ 914867)
+#define lhcheeserandom(MIN,MAX) ((double)(lhcheeserand() + 0.5) / ((double)4096.0*1024.0*1024.0) * ((MAX)-(MIN)) + (MIN))
+#define VectorCheeseRandom(v) do{(v)[0] = lhcheeserandom(-1, 1);(v)[1] = lhcheeserandom(-1, 1);(v)[2] = lhcheeserandom(-1, 1);}while(DotProduct(v, v) > 1)
+
 /*
 // LordHavoc: quaternion math, untested, don't know if these are correct,
 // need to add conversion to/from matrices