Removed problematic ModVertexAlpha method, now done in shader

apps/openmw/mwrender/sky.cpp

@@ -203,48 +203,6 @@ unsigned int Moon::getPhaseInt() const
     return 0;
 }
 
-void SkyManager::ModVertexAlpha(Entity* ent, unsigned int meshType)
-{
-    // Get the vertex colour buffer of this mesh
-    const Ogre::VertexElement* ves_diffuse = ent->getMesh()->getSubMesh(0)->vertexData->vertexDeclaration->findElementBySemantic( Ogre::VES_DIFFUSE );
-    HardwareVertexBufferSharedPtr colourBuffer = ent->getMesh()->getSubMesh(0)->vertexData->vertexBufferBinding->getBuffer(ves_diffuse->getSource());
-
-    // Lock
-    void* pData = colourBuffer->lock(HardwareBuffer::HBL_NORMAL);
-
-    // Iterate over all vertices
-    int vertex_size = colourBuffer->getVertexSize();
-    float * currentVertex = NULL;
-    for (unsigned int i=0; i<colourBuffer->getNumVertices(); ++i)
-    {
-        // Get a pointer to the vertex colour
-        ves_diffuse->baseVertexPointerToElement( pData, &currentVertex );
-
-        unsigned char alpha=0;
-        if (meshType == 0) alpha = i%2 ? 0 : 255; // this is a cylinder, so every second vertex belongs to the bottom-most row
-        else if (meshType == 1)
-        {
-            if (i>= 49 && i <= 64) alpha = 0; // bottom-most row
-            else if (i>= 33 && i <= 48) alpha = 64; // second bottom-most row
-            else alpha = 255;
-        }
-        // NB we would have to swap R and B depending on rendersystem specific VertexElementType, but doesn't matter since they are both 1
-        uint8 tmpR = static_cast<uint8>(255);
-        uint8 tmpG = static_cast<uint8>(255);
-        uint8 tmpB = static_cast<uint8>(255);
-        uint8 tmpA = static_cast<uint8>(alpha);
-
-        // Modify
-        *((uint32*)currentVertex) = tmpR | (tmpG << 8) | (tmpB << 16) | (tmpA << 24);
-
-        // Move to the next vertex
-        pData = static_cast<unsigned char *> (pData) + vertex_size;
-    }
-
-    // Unlock
-    ent->getMesh()->getSubMesh(0)->vertexData->vertexBufferBinding->getBuffer(ves_diffuse->getSource())->unlock();
-}
-
 SkyManager::SkyManager (SceneNode* pMwRoot, Camera* pCamera)
     : mHour(0.0f)
     , mDay(0)
@@ -357,7 +315,6 @@ void SkyManager::create()
         atmosphere_ent->setRenderQueueGroup(RQG_SkiesEarly);
         atmosphere_ent->setVisibilityFlags(RV_Sky);
         atmosphere_ent->getSubEntity (0)->setMaterialName ("openmw_atmosphere");
-        ModVertexAlpha(atmosphere_ent, 0);
     }
 
 
@@ -371,8 +328,6 @@ void SkyManager::create()
         clouds_ent->setRenderQueueGroup(RQG_SkiesEarly+5);
         clouds_ent->getSubEntity(0)->setMaterialName ("openmw_clouds");
         clouds_ent->setCastShadows(false);
-
-        ModVertexAlpha(clouds_ent, 1);
     }
 
     mCreated = true;

apps/openmw/mwrender/sky.hpp

@@ -218,8 +218,6 @@ namespace MWRender
         float mGlare; // target
         float mGlareFade; // actual
 
-        void ModVertexAlpha(Ogre::Entity* ent, unsigned int meshType);
-
         bool mEnabled;
         bool mSunEnabled;
         bool mMasserEnabled;

extern/shiny/CMakeLists.txt

@@ -24,13 +24,6 @@ set(SOURCE_FILES
     Main/ShaderSet.cpp
 )
 
-# In Debug mode, write the shader sources to the current directory
-if (DEFINED CMAKE_BUILD_TYPE)
-    if (CMAKE_BUILD_TYPE STREQUAL "Debug")
-        add_definitions(-DSHINY_WRITE_SHADER_DEBUG)
-    endif()
-endif()
-
 if (DEFINED SHINY_USE_WAVE_SYSTEM_INSTALL)
     # use system install
 else()

files/materials/atmosphere.shader

@@ -7,19 +7,18 @@
     SH_BEGIN_PROGRAM
         shUniform(float4x4, wvp) @shAutoConstant(wvp, worldviewproj_matrix)
 
-        shColourInput(float4)
+        shOutput(float, alphaFade)
-        shOutput(float4, colourPassthrough)
 
     SH_START_PROGRAM
     {
 	    shOutputPosition = shMatrixMult(wvp, shInputPosition);
-	    colourPassthrough = colour;
+            alphaFade = shInputPosition.z < 150.0 ? 0.0 : 1.0;
     }
 
 #else
 
     SH_BEGIN_PROGRAM
-		shInput(float4, colourPassthrough)
+                shInput(float, alphaFade)
 #if MRT
         shDeclareMrtOutput(1)
 #endif
@@ -27,7 +26,7 @@
 
     SH_START_PROGRAM
     {
-        shOutputColour(0) = colourPassthrough * atmosphereColour;
+        shOutputColour(0) = atmosphereColour * float4(1,1,1,alphaFade);
 
 #if MRT
         shOutputColour(1) = float4(1,1,1,1);

files/materials/clouds.shader

@@ -8,21 +8,20 @@
         shUniform(float4x4, wvp) @shAutoConstant(wvp, worldviewproj_matrix)
         shVertexInput(float2, uv0)
         shOutput(float2, UV)
-        shColourInput(float4)
+        shOutput(float, alphaFade)
-        shOutput(float4, colourPassthrough)
 
     SH_START_PROGRAM
     {
-        colourPassthrough = colour;
 	    shOutputPosition = shMatrixMult(wvp, shInputPosition);
 	    UV = uv0;
+            alphaFade = shInputPosition.z < 100.f ? 0 : 1;
     }
 
 #else
 
     SH_BEGIN_PROGRAM
 		shInput(float2, UV)
-		shInput(float4, colourPassthrough)
+                shInput(float, alphaFade)
 #if MRT
         shDeclareMrtOutput(1)
 #endif
@@ -42,7 +41,7 @@
         
         float4 albedo = shSample(diffuseMap1, scrolledUV) * (1-cloudBlendFactor) + shSample(diffuseMap2, scrolledUV) * cloudBlendFactor;
         
-        shOutputColour(0) = colourPassthrough * float4(cloudColour, 1) * albedo * float4(1,1,1, cloudOpacity);
+        shOutputColour(0) = float4(cloudColour, 1) * albedo * float4(1,1,1, cloudOpacity * alphaFade);
 
 #if MRT
         shOutputColour(1) = float4(1,1,1,1);