From: Andy Belle-Isle <drumsetmonkey@gmail.com>
Date: Sat, 7 Sep 2019 05:15:51 +0000 (-0400)
Subject: Flips the X axis of the normal map instead of the light direction when model is flipped
X-Git-Tag: v0.2-alpha~30
X-Git-Url: https://code.bitgloo.com/?a=commitdiff_plain;h=c9f8936fcb1afb07ead095f5c560473dc97eb3f6;p=clyne%2Fgamedev2.git

Flips the X axis of the normal map instead of the light direction when model is flipped
---

diff --git a/Shaders/world.frag b/Shaders/world.frag
index c97c880..2b5ab5e 100644
--- a/Shaders/world.frag
+++ b/Shaders/world.frag
@@ -34,13 +34,13 @@ void main()
 
     for (int i = 0; i < LightNum; i++) {
         vec3 LightDir = vec3(LightPos[i].xy - fragCoord.xy, LightPos[i].z);
-        if (Flipped == 1)
-            LightDir.x = -LightDir.x;
 
         float D = length(LightDir);
 
         vec3 N = normalize(NormalMap * 2.0 - 1.0);
         vec3 L = normalize(LightDir);
+        if (Flipped == 1)
+            N.x = -N.x;
 
         vec3 Diffuse = 
             (LightColor[i].rgb * LightColor[i].a) * max(dot(N, L), 0.0);