Engine directory for ticket #1

Engine/source/scene/reflectionMatHook.cpp

@@ -0,0 +1,108 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#include "platform/platform.h"
+#include "scene/reflectionMatHook.h"
+
+#include "materials/materialManager.h"
+#include "materials/customMaterialDefinition.h"
+#include "materials/materialFeatureTypes.h"
+#include "materials/materialFeatureData.h"
+#include "shaderGen/featureType.h"
+#include "shaderGen/featureMgr.h"
+#include "scene/sceneRenderState.h"
+
+
+const MatInstanceHookType ReflectionMaterialHook::Type( "Reflection" );
+
+ReflectionMaterialHook::ReflectionMaterialHook() : 
+   mReflectMat(NULL)
+{
+
+}
+
+ReflectionMaterialHook::~ReflectionMaterialHook()
+{
+   SAFE_DELETE(mReflectMat);
+}
+
+void ReflectionMaterialHook::init( BaseMatInstance *inMat )
+{
+   if( !inMat->isValid() )
+      return;
+
+   Material *reflectMat = (Material*)inMat->getMaterial();
+   if ( inMat->isCustomMaterial() )
+   {
+      // This is a custom material... who knows what it really does...do something
+      // smart here later.
+   }
+
+   // We may want to disable some states that the material might enable for us.
+   GFXStateBlockDesc refractState = inMat->getUserStateBlock();
+
+   // Always z-read, and z-write if the material isn't translucent
+   refractState.setZReadWrite( true, reflectMat->isTranslucent() ? false : true );
+   
+   // Create reflection material instance.
+   BaseMatInstance *newMat = new ReflectionMatInstance( reflectMat );
+   newMat->setUserObject( inMat->getUserObject() );
+   newMat->getFeaturesDelegate().bind( &ReflectionMaterialHook::_overrideFeatures );
+   newMat->addStateBlockDesc( refractState );
+   if( !newMat->init( inMat->getFeatures(), inMat->getVertexFormat() ) )
+   {
+      SAFE_DELETE( newMat );
+      newMat = MATMGR->createWarningMatInstance();
+   }
+   
+   mReflectMat = newMat;
+}
+
+void ReflectionMaterialHook::_overrideFeatures(  ProcessedMaterial *mat,
+                                             U32 stageNum,
+                                             MaterialFeatureData &fd, 
+                                             const FeatureSet &features )
+{
+   // First stage only in reflections
+   if( stageNum != 0 )
+   {
+      fd.features.clear();
+      return;
+   }
+
+   // Forward shading on materials in reflections
+   fd.features.addFeature( MFT_ForwardShading );
+   fd.features.addFeature( MFT_Fog );
+}
+
+//------------------------------------------------------------------------------
+
+ReflectionMatInstance::ReflectionMatInstance( Material *mat ) 
+ : MatInstance( *mat )
+{
+
+}
+
+bool ReflectionMatInstance::setupPass( SceneRenderState *state, const SceneData &sgData )
+{
+   return Parent::setupPass(state, sgData);
+}