From 45ae8d5ffa778c5a35c3de7037f90d9d3adabb19 Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Wed, 8 Feb 2017 18:39:24 +0100
Subject: [PATCH] Add support for GL_AMBIENT colorMode to shaders as required
 by particle systems

---
 components/shader/shadervisitor.cpp | 3 +++
 files/shaders/lighting.glsl         | 5 ++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/components/shader/shadervisitor.cpp b/components/shader/shadervisitor.cpp
index 041b568df..799781303 100644
--- a/components/shader/shadervisitor.cpp
+++ b/components/shader/shadervisitor.cpp
@@ -272,6 +272,9 @@ namespace Shader
         {
             switch (reqs.mVertexColorMode)
             {
+            case GL_AMBIENT:
+                defineMap["colorMode"] = "3";
+                break;
             default:
             case GL_AMBIENT_AND_DIFFUSE:
                 defineMap["colorMode"] = "2";
diff --git a/files/shaders/lighting.glsl b/files/shaders/lighting.glsl
index d62b61b52..7b8486fbe 100644
--- a/files/shaders/lighting.glsl
+++ b/files/shaders/lighting.glsl
@@ -5,7 +5,10 @@ vec4 doLighting(vec3 viewPos, vec3 viewNormal, vec4 vertexColor)
     vec3 lightDir;
     float d;
 
-#if @colorMode == 2
+#if @colorMode == 3
+    vec4 diffuse = gl_FrontMaterial.diffuse;
+    vec3 ambient = vertexColor.xyz;
+#elif @colorMode == 2
     vec4 diffuse = vertexColor;
     vec3 ambient = vertexColor.xyz;
 #else