Support NIF "glow maps", which are basically an emissive channel.

components/nif/property.hpp

@@ -64,7 +64,7 @@ public:
         bool inUse;
         NiSourceTexturePtr texture;
 
-        int clamp, set, filter;
+        int clamp, uvSet, filter;
         short unknown2;
 
         void read(NIFStream *nif)
@@ -75,7 +75,7 @@ public:
             texture.read(nif);
             clamp = nif->getInt();
             filter = nif->getInt();
-            set = nif->getInt();
+            uvSet = nif->getInt();
 
             // I have no idea, but I think these are actually two
             // PS2-specific shorts (ps2L and ps2K), followed by an unknown

components/nifogre/ogrenifloader.cpp

@@ -749,6 +749,13 @@ static Ogre::String getMaterial(const Nif::NiTriShape *shape, const Ogre::String
 
     instance->setProperty("diffuseMap", sh::makeProperty(texName[Nif::NiTexturingProperty::BaseTexture]));
     instance->setProperty("normalMap", sh::makeProperty(texName[Nif::NiTexturingProperty::BumpTexture]));
+    instance->setProperty("emissiveMap", sh::makeProperty(texName[Nif::NiTexturingProperty::GlowTexture]));
+    if (!texName[Nif::NiTexturingProperty::GlowTexture].empty())
+    {
+        instance->setProperty("use_emissive_map", sh::makeProperty(new sh::BooleanValue(true)));
+        instance->setProperty("emissiveMapUVSet", sh::makeProperty(new sh::IntValue(texprop->textures[Nif::NiTexturingProperty::GlowTexture].uvSet)));
+    }
+
     for(int i = 1;i < 7;i++)
     {
         if(!texName[i].empty())

files/materials/objects.mat

@@ -7,6 +7,9 @@ material openmw_objects_base
     vertmode 0
     diffuseMap black.png
     normalMap
+    emissiveMap
+    use_emissive_map false
+    emissiveMapUVSet 0
 
     is_transparent false // real transparency, alpha rejection doesn't count here
     scene_blend default
@@ -24,6 +27,8 @@ material openmw_objects_base
             vertexcolor_mode $vertmode
             is_transparent $is_transparent
             normalMap $normalMap
+            emissiveMapUVSet $emissiveMapUVSet
+            emissiveMap $emissiveMap
         }
 
         diffuse $diffuse
@@ -39,12 +44,21 @@ material openmw_objects_base
         {
             direct_texture $diffuseMap
             create_in_ffp true
+            tex_coord_set $emissiveMapUVSet
         }
 
         texture_unit normalMap
         {
             direct_texture $normalMap
         }
+
+        texture_unit emissiveMap
+        {
+            create_in_ffp $use_emissive_map
+            colour_op add
+            direct_texture $emissiveMap
+            tex_coord_set $emissiveMapUVSet
+        }
       
         texture_unit shadowMap0
         {

files/materials/objects.shader

@@ -15,6 +15,10 @@
 #endif
 
 #define NORMAL_MAP @shPropertyHasValue(normalMap)
+#define EMISSIVE_MAP @shPropertyHasValue(emissiveMap)
+
+// right now we support 2 UV sets max. implementing them is tedious, and we're probably not going to need more
+#define SECOND_UV_SET @shPropertyString(emissiveMapUVSet)
 
 // if normal mapping is enabled, we force pixel lighting
 #define VERTEX_LIGHTING (!@shPropertyHasValue(normalMap))
@@ -42,7 +46,11 @@
 #endif
 
         shVertexInput(float2, uv0)
-        shOutput(float2, UV)
+#if SECOND_UV_SET
+        shVertexInput(float2, uv1)
+#endif
+        shOutput(float4, UV)
+
         shNormalInput(float4)
 
 #if NORMAL_MAP
@@ -109,7 +117,12 @@
     SH_START_PROGRAM
     {
 	    shOutputPosition = shMatrixMult(wvp, shInputPosition);
-	    UV = uv0;
+
+        UV.xy = uv0;
+#if SECOND_UV_SET
+        UV.zw = uv1;
+#endif
+
 #if NORMAL_MAP
         tangentPassthrough = tangent.xyz;
 #endif
@@ -219,7 +232,11 @@
         shSampler2D(normalMap)
 #endif
 
-        shInput(float2, UV)
+#if EMISSIVE_MAP
+        shSampler2D(emissiveMap)
+#endif
+
+        shInput(float4, UV)
 
 #if NORMAL_MAP
         shInput(float3, tangentPassthrough)
@@ -294,7 +311,7 @@
 
     SH_START_PROGRAM
     {
-        shOutputColour(0) = shSample(diffuseMap, UV);
+        shOutputColour(0) = shSample(diffuseMap, UV.xy);
 
 #if NORMAL_MAP
         float3 normal = normalPassthrough;
@@ -399,6 +416,14 @@
         shOutputColour(0).xyz = shLerp (shOutputColour(0).xyz, fogColour, fogValue);
 #endif
 
+#endif
+
+#if EMISSIVE_MAP
+        #if SECOND_UV_SET
+        shOutputColour(0).xyz += shSample(emissiveMap, UV.zw).xyz;
+        #else
+        shOutputColour(0).xyz += shSample(emissiveMap, UV.xy).xyz;
+        #endif
 #endif
 
         // prevent negative colour output (for example with negative lights)