void PSSMLightShadowMap::_render( RenderPassManager* renderPass,
const SceneRenderState *diffuseState )
{
PROFILE_SCOPE(PSSMLightShadowMap_render);
const ShadowMapParams *params = mLight->getExtended<ShadowMapParams>();
const LightMapParams *lmParams = mLight->getExtended<LightMapParams>();
const bool bUseLightmappedGeometry = lmParams ? !lmParams->representedInLightmap || lmParams->includeLightmappedGeometryInShadow : true;
const U32 texSize = getBestTexSize( params->numSplits < 4 ? params->numSplits : 2 );
if ( mShadowMapTex.isNull() ||
mNumSplits != params->numSplits ||
mTexSize != texSize )
{
_setNumSplits( params->numSplits, texSize );
mShadowMapDepth = _getDepthTarget( mShadowMapTex->getWidth(), mShadowMapTex->getHeight() );
}
mLogWeight = params->logWeight;
Frustum fullFrustum( diffuseState->getCameraFrustum() );
fullFrustum.cropNearFar(fullFrustum.getNearDist(), params->shadowDistance);
GFXFrustumSaver frustSaver;
GFXTransformSaver saver;
// Set our render target
GFX->pushActiveRenderTarget();
mTarget->attachTexture( GFXTextureTarget::Color0, mShadowMapTex );
mTarget->attachTexture( GFXTextureTarget::DepthStencil, mShadowMapDepth );
GFX->setActiveRenderTarget( mTarget );
GFX->clear( GFXClearStencil | GFXClearZBuffer | GFXClearTarget, ColorI(255,255,255), 1.0f, 0 );
// Calculate our standard light matrices
MatrixF lightMatrix;
calcLightMatrices( lightMatrix, diffuseState->getCameraFrustum() );
lightMatrix.inverse();
MatrixF lightViewProj = GFX->getProjectionMatrix() * lightMatrix;
// TODO: This is just retrieving the near and far calculated
// in calcLightMatrices... we should make that clear.
F32 pnear, pfar;
GFX->getFrustum( NULL, NULL, NULL, NULL, &pnear, &pfar, NULL );
// Set our view up
GFX->setWorldMatrix(lightMatrix);
MatrixF toLightSpace = lightMatrix; // * invCurrentView;
_calcSplitPos(fullFrustum);
mWorldToLightProj = GFX->getProjectionMatrix() * toLightSpace;
// Apply the PSSM
const F32 savedSmallestVisible = TSShapeInstance::smSmallestVisiblePixelSize;
const F32 savedDetailAdjust = TSShapeInstance::smDetailAdjust;
TSShapeInstance::smDetailAdjust *= smDetailAdjustScale;
TSShapeInstance::smSmallestVisiblePixelSize = smSmallestVisiblePixelSize;
Vector< Vector<PlaneF> > _extraCull;
_calcPlanesCullForShadowCasters( _extraCull, fullFrustum, mLight->getDirection() );
for (U32 i = 0; i < mNumSplits; i++)
{
GFXTransformSaver saver;
// Calculate a sub-frustum
Frustum subFrustum(fullFrustum);
subFrustum.cropNearFar(mSplitDist[i], mSplitDist[i+1]);
// Calculate our AABB in the light's clip space.
Box3F clipAABB = _calcClipSpaceAABB(subFrustum, lightViewProj, fullFrustum.getFarDist());
// Calculate our crop matrix
Point3F scale(2.0f / (clipAABB.maxExtents.x - clipAABB.minExtents.x),
2.0f / (clipAABB.maxExtents.y - clipAABB.minExtents.y),
1.0f);
// TODO: This seems to produce less "pops" of the
// shadow resolution as the camera spins around and
// it should produce pixels that are closer to being
// square.
//
// Still is it the right thing to do?
//
scale.y = scale.x = ( getMin( scale.x, scale.y ) );
//scale.x = mFloor(scale.x);
//scale.y = mFloor(scale.y);
Point3F offset( -0.5f * (clipAABB.maxExtents.x + clipAABB.minExtents.x) * scale.x,
-0.5f * (clipAABB.maxExtents.y + clipAABB.minExtents.y) * scale.y,
0.0f );
MatrixF cropMatrix(true);
cropMatrix.scale(scale);
cropMatrix.setPosition(offset);
_roundProjection(lightMatrix, cropMatrix, offset, i);
cropMatrix.setPosition(offset);
// Save scale/offset for shader computations
mScaleProj[i].set(scale);
mOffsetProj[i].set(offset);
// Adjust the far plane to the max z we got (maybe add a little to deal with split overlap)
bool isOrtho;
{
F32 left, right, bottom, top, nearDist, farDist;
GFX->getFrustum(&left, &right, &bottom, &top, &nearDist, &farDist,&isOrtho);
// BTRTODO: Fix me!
farDist = clipAABB.maxExtents.z;
if (!isOrtho)
GFX->setFrustum(left, right, bottom, top, nearDist, farDist);
else
{
// Calculate a new far plane, add a fudge factor to avoid bringing
// the far plane in too close.
F32 newFar = pfar * clipAABB.maxExtents.z + 1.0f;
mFarPlaneScalePSSM[i] = (pfar - pnear) / (newFar - pnear);
GFX->setOrtho(left, right, bottom, top, pnear, newFar, true);
}
}
// Crop matrix multiply needs to be post-projection.
MatrixF alightProj = GFX->getProjectionMatrix();
alightProj = cropMatrix * alightProj;
// Set our new projection
GFX->setProjectionMatrix(alightProj);
// Render into the quad of the shadow map we are using.
GFX->setViewport(mViewports[i]);
SceneManager* sceneManager = diffuseState->getSceneManager();
// The frustum is currently the full size and has not had
// cropping applied.
//
// We make that adjustment here.
const Frustum& uncroppedFrustum = GFX->getFrustum();
Frustum croppedFrustum;
scale *= 0.5f;
croppedFrustum.set(
isOrtho,
uncroppedFrustum.getNearLeft() / scale.x,
uncroppedFrustum.getNearRight() / scale.x,
uncroppedFrustum.getNearTop() / scale.y,
uncroppedFrustum.getNearBottom() / scale.y,
uncroppedFrustum.getNearDist(),
uncroppedFrustum.getFarDist(),
uncroppedFrustum.getTransform()
);
MatrixF camera = GFX->getWorldMatrix();
camera.inverse();
croppedFrustum.setTransform( camera );
// Setup the scene state and use the diffuse state
// camera position and screen metrics values so that
// lod is done the same as in the diffuse pass.
SceneRenderState shadowRenderState
(
sceneManager,
SPT_Shadow,
SceneCameraState( diffuseState->getViewport(), croppedFrustum,
GFX->getWorldMatrix(), GFX->getProjectionMatrix() ),
renderPass
);
shadowRenderState.getMaterialDelegate().bind( this, &LightShadowMap::getShadowMaterial );
shadowRenderState.renderNonLightmappedMeshes( true );
shadowRenderState.renderLightmappedMeshes( bUseLightmappedGeometry );
shadowRenderState.setDiffuseCameraTransform( diffuseState->getCameraTransform() );
shadowRenderState.setWorldToScreenScale( diffuseState->getWorldToScreenScale() );
PlaneSetF planeSet( _extraCull[i].address(), _extraCull[i].size() );
shadowRenderState.getCullingState().setExtraPlanesCull( planeSet );
U32 objectMask = SHADOW_TYPEMASK;
if ( i == mNumSplits-1 && params->lastSplitTerrainOnly )
objectMask = TerrainObjectType;
sceneManager->renderSceneNoLights( &shadowRenderState, objectMask );
shadowRenderState.getCullingState().clearExtraPlanesCull();
_debugRender( &shadowRenderState );
}
// Restore the original TS lod settings.
TSShapeInstance::smSmallestVisiblePixelSize = savedSmallestVisible;
TSShapeInstance::smDetailAdjust = savedDetailAdjust;
// Release our render target
mTarget->resolve();
GFX->popActiveRenderTarget();
}
void ProjectedShadow::_renderToTexture( F32 camDist, const TSRenderState &rdata )
{
PROFILE_SCOPE( ProjectedShadow_RenderToTexture );
GFXDEBUGEVENT_SCOPE( ProjectedShadow_RenderToTexture, ColorI( 255, 0, 0 ) );
RenderPassManager *renderPass = _getRenderPass();
if ( !renderPass )
return;
GFXTransformSaver saver;
// NOTE: GFXTransformSaver does not save/restore the frustum
// so we must save it here before we modify it.
F32 l, r, b, t, n, f;
bool ortho;
GFX->getFrustum( &l, &r, &b, &t, &n, &f, &ortho );
// Set the orthographic projection
// matrix up, to be based on the radius
// generated based on our shape.
GFX->setOrtho( -mRadius, mRadius, -mRadius, mRadius, 0.001f, (mRadius * 2) * smDepthAdjust, true );
// Set the world to light space
// matrix set up in shouldRender().
GFX->setWorldMatrix( mWorldToLight );
// Get the shapebase datablock if we have one.
ShapeBaseData *data = NULL;
if ( mShapeBase )
data = static_cast<ShapeBaseData*>( mShapeBase->getDataBlock() );
// Init or update the shadow texture size.
if ( mShadowTexture.isNull() || ( data && data->shadowSize != mShadowTexture.getWidth() ) )
{
U32 texSize = getNextPow2( data ? data->shadowSize : 256 * LightShadowMap::smShadowTexScalar );
mShadowTexture.set( texSize, texSize, GFXFormatR8G8B8A8, &PostFxTargetProfile, "BLShadow" );
}
GFX->pushActiveRenderTarget();
if ( !mRenderTarget )
mRenderTarget = GFX->allocRenderToTextureTarget();
mRenderTarget->attachTexture( GFXTextureTarget::DepthStencil, _getDepthTarget( mShadowTexture->getWidth(), mShadowTexture->getHeight() ) );
mRenderTarget->attachTexture( GFXTextureTarget::Color0, mShadowTexture );
GFX->setActiveRenderTarget( mRenderTarget );
GFX->clear( GFXClearZBuffer | GFXClearStencil | GFXClearTarget, ColorI( 0, 0, 0, 0 ), 1.0f, 0 );
const SceneRenderState *diffuseState = rdata.getSceneState();
SceneManager *sceneManager = diffuseState->getSceneManager();
SceneRenderState baseState
(
sceneManager,
SPT_Shadow,
SceneCameraState::fromGFXWithViewport( diffuseState->getViewport() ),
renderPass
);
baseState.getMaterialDelegate().bind( &ProjectedShadow::_getShadowMaterial );
baseState.setDiffuseCameraTransform( diffuseState->getCameraTransform() );
baseState.setWorldToScreenScale( diffuseState->getWorldToScreenScale() );
baseState.getCullingState().disableZoneCulling( true );
mParentObject->prepRenderImage( &baseState );
renderPass->renderPass( &baseState );
// Delete the SceneRenderState we allocated.
mRenderTarget->resolve();
GFX->popActiveRenderTarget();
// If we're close enough then filter the shadow.
if ( camDist < BasicLightManager::getShadowFilterDistance() )
{
if ( !smShadowFilter )
{
PostEffect *filter = NULL;
if ( !Sim::findObject( "BL_ShadowFilterPostFx", filter ) )
Con::errorf( "ProjectedShadow::_renderToTexture() - 'BL_ShadowFilterPostFx' not found!" );
smShadowFilter = filter;
}
if ( smShadowFilter )
smShadowFilter->process( NULL, mShadowTexture );
}
// Restore frustum
if (!ortho)
GFX->setFrustum(l, r, b, t, n, f);
else
GFX->setOrtho(l, r, b, t, n, f);
// Set the last render time.
mLastRenderTime = Platform::getVirtualMilliseconds();
// HACK: Will remove in future release!
mDecalInstance->mCustomTex = &mShadowTexture;
}