From 45e4fac7191a8f2fb6367eafee4913afe127cc93 Mon Sep 17 00:00:00 2001 From: lordhavoc Date: Mon, 16 Oct 2000 20:46:19 +0000 Subject: [PATCH] minor speedup to VectorNormalize #define's git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@52 d7cf8633-e32d-0410-b094-e92efae38249 --- mathlib.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mathlib.h b/mathlib.h index 881b2436..42c76ea8 100644 --- a/mathlib.h +++ b/mathlib.h @@ -45,8 +45,8 @@ extern int nanmask; #define VectorAdd(a,b,c) {c[0]=a[0]+b[0];c[1]=a[1]+b[1];c[2]=a[2]+b[2];} #define VectorCopy(a,b) {b[0]=a[0];b[1]=a[1];b[2]=a[2];} #define CrossProduct(v1,v2,cross) {cross[0] = v1[1]*v2[2] - v1[2]*v2[1];cross[1] = v1[2]*v2[0] - v1[0]*v2[2];cross[2] = v1[0]*v2[1] - v1[1]*v2[0];} -#define VectorNormalize(v) {float ilength;if ((ilength = sqrt (v[0]*v[0] + v[1]*v[1] + v[2]*v[2]))) {ilength = 1/ilength;v[0] *= ilength;v[1] *= ilength;v[2] *= ilength;}} -#define VectorNormalize2(v,dest) {float ilength;if ((ilength = sqrt (v[0]*v[0] + v[1]*v[1] + v[2]*v[2]))) {ilength = 1/ilength;dest[0] = v[0] * ilength;dest[1] = v[1] * ilength;dest[2] = v[2] * ilength;}} +#define VectorNormalize(v) {float ilength = 1.0f / (float) sqrt(DotProduct(v,v));v[0] *= ilength;v[1] *= ilength;v[2] *= ilength;} +#define VectorNormalize2(v,dest) {float ilength = 1.0f / (float) sqrt(DotProduct(v,v));dest[0] = v[0] * ilength;dest[1] = v[1] * ilength;dest[2] = v[2] * ilength;} #define VectorDistance2(a, b) ((a[0] - b[0]) * (a[0] - b[0]) + (a[1] - b[1]) * (a[1] - b[1]) + (a[2] - b[2]) * (a[2] - b[2])) #define VectorDistance(a, b) sqrt(VectorDistance(a,b)) #define VectorLength(a) sqrt(DotProduct(a, a)) -- 2.39.2