From f8e3213996fc91583c6c1e935441709cdab43ec6 Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Wed, 4 Jul 2012 16:57:14 +0200
Subject: [PATCH] fog, mrt depth

---
 extern/shiny                   |  2 +-
 files/materials/core.h         | 13 +++++++---
 files/materials/objects.mat    |  5 ++++
 files/materials/objects.shader | 45 ++++++++++++++++++++++++++++++++--
 4 files changed, 59 insertions(+), 6 deletions(-)

diff --git a/extern/shiny b/extern/shiny
index 3928949316..8d95f53464 160000
--- a/extern/shiny
+++ b/extern/shiny
@@ -1 +1 @@
-Subproject commit 3928949316713d0c8aaf1ad564734d24ad773be9
+Subproject commit 8d95f53464a779c7da643228ace02ae28ec6a503
diff --git a/files/materials/core.h b/files/materials/core.h
index 2f51925a0e..20127d3dec 100644
--- a/files/materials/core.h
+++ b/files/materials/core.h
@@ -14,6 +14,8 @@
     #define shInput(type, name) , in type name : TEXCOORD@shCounter(1)
     #define shOutput(type, name) , out type name : TEXCOORD@shCounter(2)
 
+    #define shNormalInput(type) , in type normal : NORMAL
+
     #ifdef SH_VERTEX_SHADER
 
         #define shOutputPosition oPosition
@@ -32,7 +34,9 @@
 
     #ifdef SH_FRAGMENT_SHADER
 
-        #define shOutputColor oColor
+        #define shOutputColor(num) oColor##num
+
+        #define shDeclareMrtOutput(num) , out float4 oColor##num : COLOR##num
 
         #define SH_BEGIN_PROGRAM \
             void main( \
@@ -67,13 +71,14 @@
 
     #define shInputPosition vertex
     #define shOutputPosition gl_Position
-    #define shOutputColor oColor
+    #define shOutputColor(num) oColor##num
 
     #define float4x4 mat4
 
     #define shInput(type, name) in type name;
     #define shOutput(type, name) out type name;
 
+    #define shNormalInput(type) in type normal;
 
     #ifdef SH_VERTEX_SHADER
 
@@ -86,8 +91,10 @@
 
     #ifdef SH_FRAGMENT_SHADER
 
+        #define shDeclareMrtOutput(num) out vec4 oColor##num;
+
         #define SH_BEGIN_PROGRAM \
-            out float4 oColor;
+            out float4 oColor0;
         #define SH_START_PROGRAM \
             void main(void)
 
diff --git a/files/materials/objects.mat b/files/materials/objects.mat
index 564018724b..69b89a7e51 100644
--- a/files/materials/objects.mat
+++ b/files/materials/objects.mat
@@ -6,6 +6,8 @@ material openmw_objects_base
     emissive 0.0 0.0 0.0
     has_vertex_colour false
     diffuseMap black.png
+    fog true
+    is_transparent false // real transparency, alpha rejection doesn't count here
 
     pass
     {
@@ -16,9 +18,12 @@ material openmw_objects_base
         specular $specular
         ambient $ambient
         emissive $emissive
+        fog $fog
 
         ffp_vertex_colour_ambient $has_vertex_colour
         has_vertex_colour $has_vertex_colour
+        
+        is_transparent $is_transparent
 
         texture_unit diffuseMap
         {
diff --git a/files/materials/objects.shader b/files/materials/objects.shader
index 7bd91e526a..08e9913d98 100644
--- a/files/materials/objects.shader
+++ b/files/materials/objects.shader
@@ -1,15 +1,36 @@
 #include "core.h"
 
+
+#define FOG @shPropertyBool(fog)
+#define MRT @shPropertyNotBool(is_transparent)
+
+#if MRT
+#define NEED_DEPTH
+#endif
+
+#if FOG
+#define NEED_DEPTH
+#endif
+
 #ifdef SH_VERTEX_SHADER
 
     SH_BEGIN_PROGRAM
         shUniform(float4x4 wvp) @shAutoConstant(wvp, worldviewproj_matrix)
         shInput(float2, uv0)
         shOutput(float2, UV)
+        shNormalInput(float4)
+        shOutput(float4, normalPassthrough)
+        #ifdef NEED_DEPTH
+        shOutput(float, depthPassthrough)
+        #endif
     SH_START_PROGRAM
     {
 	    shOutputPosition = shMatrixMult(wvp, shInputPosition);
 	    UV = uv0;
+        normalPassthrough = normal;
+        #ifdef NEED_DEPTH
+        depthPassthrough = shOutputPosition.z;
+        #endif
     }
 
 #else
@@ -17,11 +38,31 @@
     SH_BEGIN_PROGRAM
 		shSampler2D(diffuseMap)
 		shInput(float2, UV)
+        shDeclareMrtOutput(1)
+        shInput(float4, normalPassthrough)
 
+        #ifdef NEED_DEPTH
+        shInput(float, depthPassthrough)
+        #endif
+   
+        shUniform(float far) @shAutoConstant(far, far_clip_distance)
+        
+#if FOG
+        shUniform(float3 fogColor) @shAutoConstant(fogColor, fog_colour)
+        shUniform(float4 fogParams) @shAutoConstant(fogParams, fog_params)
+
+#endif
     SH_START_PROGRAM
     {
-       // shOutputColor = float4(1.0, 0.0, 0.0, 1.0);
-        shOutputColor = shSample(diffuseMap, UV);
+        //shOutputColor(0) = float4((normalize(normalPassthrough.xyz)+float3(1.0,1.0,1.0)) / 2.f, 1.0);
+        shOutputColor(0) = shSample(diffuseMap, UV);
+
+#if FOG
+        float fogValue = shSaturate((depthPassthrough - fogParams.y) * fogParams.w);
+        shOutputColor(0).xyz = shLerp (shOutputColor(0).xyz, fogColor, fogValue);
+#endif
+
+        shOutputColor(1) = float4(depthPassthrough / far,1,1,1);
     }
 
 #endif