SO3DeferredCompositorLighting.cpp

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/*
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This source file is part of OpenSpace3D
For the latest info, see http://www.openspace3d.com
 
Copyright (c) 2012 I-maginer
 
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
 
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 
You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt
 
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*/
 
#include "SO3Renderer/DeferredShading/SO3DeferredCompositorLighting.h"
#include "SO3Renderer/DeferredShading/SO3DeferredShading.h"
#include "SO3Utils/SO3Exception.h"
 
namespace SO3
{
 
SDeferredCompositorLighting::SDeferredCompositorLighting() : SDeferredCompositor("ShowLit")
{
}
 
Ogre::CompositorPtr SDeferredCompositorLighting::GenerateCompositor(SGBuffer* gBuffer)
{
  Ogre::String compoName = "SO3/Deferred/Compositor/"+ name +"/"+ gBuffer->GetName();
 
  // Create compo
  Ogre::CompositorPtr compositor = Ogre::CompositorManager::getSingleton().create(compoName, Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
 
  // Create the technique
  Ogre::CompositionTechnique* compositionTechnique = compositor->createTechnique();
 
  // Reference to gbuffer texture
  Ogre::CompositionTechnique::TextureDefinition* gBufferTexture = compositionTechnique->createTextureDefinition("mrt_output");
  gBufferTexture->refCompName = "SO3/Deferred/Compositor/GBuffer/" + gBuffer->GetName();
  gBufferTexture->refTexName = "mrt_output";
 
  // Create the output target
  Ogre::CompositionTargetPass* compositionTargetPass = compositionTechnique->getOutputTargetPass();
  compositionTargetPass->setInputMode(Ogre::CompositionTargetPass::IM_NONE);
  compositionTargetPass->setShadowsEnabled(false);
 
  // Create a "clear" pass on the target
  Ogre::CompositionPass* compositionPass = compositionTargetPass->createPass();
  compositionPass->setType(Ogre::CompositionPass::PT_CLEAR);
 
  // render skies and other pre-gbuffer objects
  compositionPass = compositionTargetPass->createPass();
  compositionPass->setType(Ogre::CompositionPass::PT_RENDERSCENE);
  compositionPass->setFirstRenderQueue(1);
  compositionPass->setLastRenderQueue(SDeferredShading::PRE_GBUFFER_RENDER_QUEUE - 1);
 
  //Render the lights and their meshes
  compositionPass = compositionTargetPass->createPass();
  compositionPass->setType(Ogre::CompositionPass::PT_RENDERCUSTOM);
  compositionPass->setCustomType("DeferredLight");
  unsigned int numberMrt = gBuffer->GetNumberMrt();
  for(unsigned int i = 0; i<numberMrt; i++)
    compositionPass->setInput(i, "mrt_output", i);
 
  //Render the objects that skipped rendering into the gbuffer
  compositionPass = compositionTargetPass->createPass();
  compositionPass->setType(Ogre::CompositionPass::PT_RENDERSCENE);
  compositionPass->setFirstRenderQueue(SDeferredShading::PRE_GBUFFER_RENDER_QUEUE);
  compositionPass->setLastRenderQueue(SDeferredShading::POST_GBUFFER_RENDER_QUEUE - 1);
  compositionPass->setMaterialScheme("NoGBuffer");
 
  //Render the post-GBuffer render queue objects
  compositionPass = compositionTargetPass->createPass();
  compositionPass->setType(Ogre::CompositionPass::PT_RENDERSCENE);
  compositionPass->setFirstRenderQueue(SDeferredShading::POST_GBUFFER_RENDER_QUEUE);
 
  // Compositor is created!
  return compositor;
}
 
}