From: Miklós Máté <mtmkls@gmail.com>
Date: Tue, 15 Dec 2015 23:05:40 +0000 (+0100)
Subject: program: fix comment about the fog formula
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5150d56ec43e3081a8a2e114d2ff7be347749c4b;p=mesa.git

program: fix comment about the fog formula

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
---

diff --git a/src/mesa/program/prog_statevars.c b/src/mesa/program/prog_statevars.c
index bdb335e4ba3..12490d0c380 100644
--- a/src/mesa/program/prog_statevars.c
+++ b/src/mesa/program/prog_statevars.c
@@ -474,7 +474,7 @@ _mesa_fetch_state(struct gl_context *ctx, const gl_state_index state[],
           * single MAD.
           * linear: fogcoord * -1/(end-start) + end/(end-start)
           * exp: 2^-(density/ln(2) * fogcoord)
-          * exp2: 2^-((density/(ln(2)^2) * fogcoord)^2)
+          * exp2: 2^-((density/(sqrt(ln(2))) * fogcoord)^2)
           */
          value[0] = (ctx->Fog.End == ctx->Fog.Start)
             ? 1.0f : (GLfloat)(-1.0F / (ctx->Fog.End - ctx->Fog.Start));