replace 1.0/sqrt() with inversesqrt()

2008-10-10 12:04:49 -06:00
parent a45d293fd9
commit b3a68b24bd
1 changed files with 1 additions and 1 deletions
--- a/progs/glsl/CH11-bumpmap.frag
+++ b/progs/glsl/CH11-bumpmap.frag
@@ -24,7 +24,7 @@ void main()

    float d, f;
    d = p.x * p.x + p.y * p.y;
-    f = 1.0 / sqrt(d + 1.0);
+    f = inversesqrt(d + 1.0);

    if (d >= BumpSize)
        { p = vec2(0.0); f = 1.0; }