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DavidWyand-GG 2012-09-19 11:15:01 -04:00
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Engine/source/lighting/shadowMap/cubeLightShadowMap.cpp Normal file
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//-----------------------------------------------------------------------------
// 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 "lighting/shadowMap/cubeLightShadowMap.h"
#include "lighting/shadowMap/shadowMapManager.h"
#include "lighting/common/lightMapParams.h"
#include "scene/sceneManager.h"
#include "scene/sceneRenderState.h"
#include "gfx/gfxDevice.h"
#include "gfx/gfxTransformSaver.h"
#include "gfx/gfxDebugEvent.h"
#include "renderInstance/renderPassManager.h"
#include "materials/materialDefinition.h"
#include "gfx/util/gfxFrustumSaver.h"
#include "math/mathUtils.h"
CubeLightShadowMap::CubeLightShadowMap( LightInfo *light )
: Parent( light )
{
}
bool CubeLightShadowMap::setTextureStage( U32 currTexFlag, LightingShaderConstants* lsc )
{
if ( currTexFlag == Material::DynamicLight )
{
S32 reg = lsc->mShadowMapSC->getSamplerRegister();
if ( reg != -1 )
GFX->setCubeTexture( reg, mCubemap );
return true;
}
return false;
}
void CubeLightShadowMap::setShaderParameters( GFXShaderConstBuffer *params,
LightingShaderConstants *lsc )
{
if ( lsc->mTapRotationTexSC->isValid() )
GFX->setTexture( lsc->mTapRotationTexSC->getSamplerRegister(),
SHADOWMGR->getTapRotationTex() );
ShadowMapParams *p = mLight->getExtended<ShadowMapParams>();
if ( lsc->mLightParamsSC->isValid() )
{
Point4F lightParams( mLight->getRange().x,
p->overDarkFactor.x,
0.0f,
0.0f );
params->set(lsc->mLightParamsSC, lightParams);
}
// The softness is a factor of the texel size.
params->setSafe( lsc->mShadowSoftnessConst, p->shadowSoftness * ( 1.0f / mTexSize ) );
}
void CubeLightShadowMap::releaseTextures()
{
Parent::releaseTextures();
mCubemap = NULL;
}
void CubeLightShadowMap::_render( RenderPassManager* renderPass,
const SceneRenderState *diffuseState )
{
PROFILE_SCOPE( CubeLightShadowMap_Render );
const LightMapParams *lmParams = mLight->getExtended<LightMapParams>();
const bool bUseLightmappedGeometry = lmParams ? !lmParams->representedInLightmap || lmParams->includeLightmappedGeometryInShadow : true;
const U32 texSize = getBestTexSize();
if ( mCubemap.isNull() ||
mTexSize != texSize )
{
mTexSize = texSize;
mCubemap = GFX->createCubemap();
mCubemap->initDynamic( mTexSize, LightShadowMap::ShadowMapFormat );
}
// Setup the world to light projection which is used
// in the shader to transform the light vector for the
// shadow lookup.
mWorldToLightProj = mLight->getTransform();
mWorldToLightProj.inverse();
// Set up frustum and visible distance
GFXFrustumSaver fsaver;
GFXTransformSaver saver;
{
F32 left, right, top, bottom;
MathUtils::makeFrustum( &left, &right, &top, &bottom, M_HALFPI_F, 1.0f, 0.1f );
GFX->setFrustum( left, right, bottom, top, 0.1f, mLight->getRange().x );
}
// Render the shadowmap!
GFX->pushActiveRenderTarget();
for( U32 i = 0; i < 6; i++ )
{
// Standard view that will be overridden below.
VectorF vLookatPt(0.0f, 0.0f, 0.0f), vUpVec(0.0f, 0.0f, 0.0f), vRight(0.0f, 0.0f, 0.0f);
switch( i )
{
case 0 : // D3DCUBEMAP_FACE_POSITIVE_X:
vLookatPt = VectorF(1.0f, 0.0f, 0.0f);
vUpVec = VectorF(0.0f, 1.0f, 0.0f);
break;
case 1 : // D3DCUBEMAP_FACE_NEGATIVE_X:
vLookatPt = VectorF(-1.0f, 0.0f, 0.0f);
vUpVec = VectorF(0.0f, 1.0f, 0.0f);
break;
case 2 : // D3DCUBEMAP_FACE_POSITIVE_Y:
vLookatPt = VectorF(0.0f, 1.0f, 0.0f);
vUpVec = VectorF(0.0f, 0.0f,-1.0f);
break;
case 3 : // D3DCUBEMAP_FACE_NEGATIVE_Y:
vLookatPt = VectorF(0.0f, -1.0f, 0.0f);
vUpVec = VectorF(0.0f, 0.0f, 1.0f);
break;
case 4 : // D3DCUBEMAP_FACE_POSITIVE_Z:
vLookatPt = VectorF(0.0f, 0.0f, 1.0f);
vUpVec = VectorF(0.0f, 1.0f, 0.0f);
break;
case 5: // D3DCUBEMAP_FACE_NEGATIVE_Z:
vLookatPt = VectorF(0.0f, 0.0f, -1.0f);
vUpVec = VectorF(0.0f, 1.0f, 0.0f);
break;
}
GFXDEBUGEVENT_START( CubeLightShadowMap_Render_Face, ColorI::RED );
// create camera matrix
VectorF cross = mCross(vUpVec, vLookatPt);
cross.normalizeSafe();
MatrixF lightMatrix(true);
lightMatrix.setColumn(0, cross);
lightMatrix.setColumn(1, vLookatPt);
lightMatrix.setColumn(2, vUpVec);
lightMatrix.setPosition( mLight->getPosition() );
lightMatrix.inverse();
GFX->setWorldMatrix( lightMatrix );
mTarget->attachTexture(GFXTextureTarget::Color0, mCubemap, i);
mTarget->attachTexture(GFXTextureTarget::DepthStencil, _getDepthTarget( mTexSize, mTexSize ));
GFX->setActiveRenderTarget(mTarget);
GFX->clear( GFXClearTarget | GFXClearStencil | GFXClearZBuffer, ColorI(255,255,255,255), 1.0f, 0 );
// Create scene state, prep it
SceneManager* sceneManager = diffuseState->getSceneManager();
SceneRenderState shadowRenderState
(
sceneManager,
SPT_Shadow,
SceneCameraState::fromGFXWithViewport( diffuseState->getViewport() ),
renderPass
);
shadowRenderState.getMaterialDelegate().bind( this, &LightShadowMap::getShadowMaterial );
shadowRenderState.renderNonLightmappedMeshes( true );
shadowRenderState.renderLightmappedMeshes( bUseLightmappedGeometry );
shadowRenderState.setDiffuseCameraTransform( diffuseState->getCameraTransform() );
shadowRenderState.setWorldToScreenScale( diffuseState->getWorldToScreenScale() );
sceneManager->renderSceneNoLights( &shadowRenderState, SHADOW_TYPEMASK );
_debugRender( &shadowRenderState );
// Resolve this face
mTarget->resolve();
GFXDEBUGEVENT_END();
}
GFX->popActiveRenderTarget();
}