singleLightShadowMap.cpp

Engine/source/lighting/shadowMap/singleLightShadowMap.cpp

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Detailed Description

  1
  2//-----------------------------------------------------------------------------
  3// Copyright (c) 2012 GarageGames, LLC
  4//
  5// Permission is hereby granted, free of charge, to any person obtaining a copy
  6// of this software and associated documentation files (the "Software"), to
  7// deal in the Software without restriction, including without limitation the
  8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  9// sell copies of the Software, and to permit persons to whom the Software is
 10// furnished to do so, subject to the following conditions:
 11//
 12// The above copyright notice and this permission notice shall be included in
 13// all copies or substantial portions of the Software.
 14//
 15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 21// IN THE SOFTWARE.
 22//-----------------------------------------------------------------------------
 23
 24#include "platform/platform.h"
 25#include "lighting/shadowMap/singleLightShadowMap.h"
 26#include "lighting/shadowMap/shadowMapManager.h"
 27#include "lighting/common/lightMapParams.h"
 28#include "console/console.h"
 29#include "scene/sceneManager.h"
 30#include "scene/sceneRenderState.h"
 31//#include "scene/sceneReflectPass.h"
 32#include "gfx/gfxDevice.h"
 33#include "gfx/util/gfxFrustumSaver.h"
 34#include "gfx/gfxTransformSaver.h"
 35#include "renderInstance/renderPassManager.h"
 36
 37SingleLightShadowMap::SingleLightShadowMap(  LightInfo *light )
 38   :  LightShadowMap( light )
 39{
 40}
 41
 42SingleLightShadowMap::~SingleLightShadowMap()
 43{
 44   releaseTextures();
 45}
 46
 47void SingleLightShadowMap::_render( RenderPassManager* renderPass,
 48                                    const SceneRenderState *diffuseState )
 49{
 50   PROFILE_SCOPE(SingleLightShadowMap_render);
 51
 52   const LightMapParams *lmParams = mLight->getExtended<LightMapParams>();
 53   const bool bUseLightmappedGeometry = lmParams ? !lmParams->representedInLightmap || lmParams->includeLightmappedGeometryInShadow : true;
 54
 55   const U32 texSize = getBestTexSize();
 56
 57   if (  mShadowMapTex.isNull() ||
 58         mTexSize != texSize )
 59   {
 60      mTexSize = texSize;
 61
 62      mShadowMapTex.set(   mTexSize, mTexSize, 
 63                           ShadowMapFormat, &ShadowMapProfile, 
 64                           "SingleLightShadowMap" );
 65   }
 66
 67   GFXFrustumSaver frustSaver;
 68   GFXTransformSaver saver;
 69
 70   MatrixF lightMatrix;
 71   calcLightMatrices( lightMatrix, diffuseState->getCameraFrustum() );
 72   lightMatrix.inverse();
 73   GFX->setWorldMatrix(lightMatrix);
 74
 75   const MatrixF& lightProj = GFX->getProjectionMatrix();
 76   mWorldToLightProj = lightProj * lightMatrix;
 77
 78   // Render the shadowmap!
 79   GFX->pushActiveRenderTarget();
 80   mTarget->attachTexture( GFXTextureTarget::Color0, mShadowMapTex );
 81   mTarget->attachTexture( GFXTextureTarget::DepthStencil, 
 82      _getDepthTarget( mShadowMapTex->getWidth(), mShadowMapTex->getHeight() ) );
 83   GFX->setActiveRenderTarget(mTarget);
 84   GFX->clear(GFXClearStencil | GFXClearZBuffer | GFXClearTarget, ColorI(255,255,255), 1.0f, 0);
 85
 86   SceneManager* sceneManager = diffuseState->getSceneManager();
 87   
 88   SceneRenderState shadowRenderState
 89   (
 90      sceneManager,
 91      SPT_Shadow,
 92      SceneCameraState::fromGFXWithViewport( diffuseState->getViewport() ),
 93      renderPass
 94   );
 95
 96   shadowRenderState.getMaterialDelegate().bind( this, &LightShadowMap::getShadowMaterial );
 97   shadowRenderState.renderNonLightmappedMeshes( true );
 98   shadowRenderState.renderLightmappedMeshes( bUseLightmappedGeometry );
 99   shadowRenderState.setDiffuseCameraTransform( diffuseState->getCameraTransform() );
100   shadowRenderState.setWorldToScreenScale( diffuseState->getWorldToScreenScale() );
101
102   sceneManager->renderSceneNoLights( &shadowRenderState, SHADOW_TYPEMASK );
103
104   _debugRender( &shadowRenderState );
105
106   mTarget->resolve();
107   GFX->popActiveRenderTarget();
108}
109
110void SingleLightShadowMap::setShaderParameters(GFXShaderConstBuffer* params, LightingShaderConstants* lsc)
111{
112   if ( lsc->mTapRotationTexSC->isValid() )
113      GFX->setTexture( lsc->mTapRotationTexSC->getSamplerRegister(), 
114                        SHADOWMGR->getTapRotationTex() );
115
116   ShadowMapParams *p = mLight->getExtended<ShadowMapParams>();
117
118   if ( lsc->mLightParamsSC->isValid() )
119   {
120      Point4F lightParams( mLight->getRange().x, 
121                           p->overDarkFactor.x, 
122                           0.0f, 
123                           0.0f );
124      params->set(lsc->mLightParamsSC, lightParams);
125   }
126
127   // The softness is a factor of the texel size.
128   params->setSafe( lsc->mShadowSoftnessConst, p->shadowSoftness * ( 1.0f / mTexSize ) );
129}
130