Slight improvement to the precision of the GMISC invsqrt() function.

2013-10-24 15:25:50 +10:00 · 2013-10-24 15:25:50 +10:00 · 0ea2f54637
parent e6f17baf61
commit 0ea2f54637
1 changed files with 1 additions and 1 deletions
--- a/src/gmisc/trig.c
+++ b/src/gmisc/trig.c
@ -167,7 +167,7 @@
 			#endif

 			// evil floating point bit level hacking
-			i  = 0x5F3759DF - (i >> 1);
+			i  = 0x5F375A86 - (i >> 1);					// The quake code used 0x5F3759DF but this is better.

 			// Convert back to a float (no binary format conversion)
 			#if GDISP_INVSQRT_MIXED_ENDIAN