From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Wed, 15 Dec 2004 00:54:17 +0000 (+0000)
Subject: s/DP3/DP3_SAT/ to prevent negative values
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=244adeb639cf13c531bcce78734b911fc19b943d;p=mesa.git

s/DP3/DP3_SAT/ to prevent negative values
---

diff --git a/progs/demos/arbfplight.c b/progs/demos/arbfplight.c
index 50a1b7e9f32..d5508a6aa83 100644
--- a/progs/demos/arbfplight.c
+++ b/progs/demos/arbfplight.c
@@ -217,7 +217,7 @@ static void Init( void )
       "MUL normal, fragment.texcoord[0], len.y; \n"
 
       "# Compute dot product of light direction and normal vector\n"
-      "DP3 dotProd, lightDir, normal; \n"
+      "DP3_SAT dotProd, lightDir, normal;             # limited to [0,1]\n"
 
       "MUL diffuseColor, Diffuse, dotProd;            # diffuse attenuation\n"
 
diff --git a/progs/demos/fplight.c b/progs/demos/fplight.c
index 4f8b42aa96e..6eb77c60ea6 100644
--- a/progs/demos/fplight.c
+++ b/progs/demos/fplight.c
@@ -180,7 +180,7 @@ static void Init( void )
       "MUL R1, f[TEX0], R1.y;\n"
 
       "# Compute dot product of light direction and normal vector\n"
-      "DP3 R2, R0, R1;"
+      "DP3_SAT R2, R0, R1;"
 
       "MUL R3, Diffuse, R2;    # diffuse attenuation\n"