void GBufferConditionerGLSL::processPix( Vector<ShaderComponent*> &componentList,
const MaterialFeatureData &fd )
{
// sanity
AssertFatal( fd.features[MFT_EyeSpaceDepthOut], "No depth-out feature enabled! Bad news!" );
MultiLine *meta = new MultiLine;
// grab connector normal
ShaderConnector *connectComp = dynamic_cast<ShaderConnector *>( componentList[C_CONNECTOR] );
Var *gbNormal = (Var*) LangElement::find( "gbNormal" );
if( !gbNormal )
{
gbNormal = connectComp->getElement( RT_TEXCOORD );
gbNormal->setName( "gbNormal" );
gbNormal->setType( "vec3" );
gbNormal->mapsToSampler = false;
gbNormal->uniform = false;
}
// find depth
ShaderFeature *depthFeat = FEATUREMGR->getByType( MFT_EyeSpaceDepthOut );
AssertFatal( depthFeat != NULL, "No eye space depth feature found!" );
Var *depth = (Var*) LangElement::find(depthFeat->getOutputVarName());
AssertFatal( depth, "Something went bad with ShaderGen. The depth should be already generated by the EyeSpaceDepthOut feature." );
Var *unconditionedOut = new Var;
unconditionedOut->setType("vec4");
unconditionedOut->setName("normal_depth");
LangElement *outputDecl = new DecOp( unconditionedOut );
// NOTE: We renormalize the normal here as they
// will not stay normalized during interpolation.
meta->addStatement( new GenOp(" @ = @;", outputDecl, new GenOp( "vec4(normalize(@), @)", gbNormal, depth ) ) );
meta->addStatement( assignOutput( unconditionedOut ) );
output = meta;
}
void GBufferConditionerGLSL::processPix( Vector<ShaderComponent*> &componentList,
const MaterialFeatureData &fd )
{
// sanity
AssertFatal( fd.features[MFT_EyeSpaceDepthOut], "No depth-out feature enabled! Bad news!" );
MultiLine *meta = new MultiLine;
// grab connector normal
ShaderConnector *connectComp = dynamic_cast<ShaderConnector *>( componentList[C_CONNECTOR] );
Var *gbNormal = (Var*) LangElement::find( "gbNormal" );
if( !gbNormal )
{
gbNormal = connectComp->getElement( RT_TEXCOORD );
gbNormal->setName( "gbNormal" );
gbNormal->setStructName( "IN" );
gbNormal->setType( "float3" );
gbNormal->mapsToSampler = false;
gbNormal->uniform = false;
}
// find depth
ShaderFeature *depthFeat = FEATUREMGR->getByType( MFT_EyeSpaceDepthOut );
AssertFatal( depthFeat != NULL, "No eye space depth feature found!" );
Var *depth = (Var*) LangElement::find(depthFeat->getOutputVarName());
AssertFatal( depth, "Something went bad with ShaderGen. The depth should be already generated by the EyeSpaceDepthOut feature." );
Var *unconditionedOut = new Var;
unconditionedOut->setType("float4");
unconditionedOut->setName("normal_depth");
LangElement *outputDecl = new DecOp( unconditionedOut );
// If we're doing prepass blending then we need
// to steal away the alpha channel before the
// conditioner stomps on it.
Var *alphaVal = NULL;
if ( fd.features[ MFT_IsTranslucentZWrite ] )
{
alphaVal = new Var( "outAlpha", "float" );
meta->addStatement( new GenOp( " @ = col.a; // MFT_IsTranslucentZWrite\r\n", new DecOp( alphaVal ) ) );
}
// If using interlaced normals, invert the normal
if(fd.features[MFT_InterlacedPrePass])
{
// NOTE: Its safe to not call ShaderFeatureGLSL::addOutVpos() in the vertex
// shader as for SM 3.0 nothing is needed there.
Var *Vpos = (Var*) LangElement::find( "gl_Position" ); //Var *Vpos = ShaderFeatureGLSL::getInVpos( meta, componentList );
Var *iGBNormal = new Var( "interlacedGBNormal", "float3" );
meta->addStatement(new GenOp(" @ = (frac(@.y * 0.5) < 0.1 ? reflect(@, float3(0.0, -1.0, 0.0)) : @);\r\n", new DecOp(iGBNormal), Vpos, gbNormal, gbNormal));
gbNormal = iGBNormal;
}
// NOTE: We renormalize the normal here as they
// will not stay normalized during interpolation.
meta->addStatement( new GenOp(" @ = @;", outputDecl, new GenOp( "float4(normalize(@), @)", gbNormal, depth ) ) );
meta->addStatement( assignOutput( unconditionedOut ) );
// If we have an alpha var then we're doing prepass lerp blending.
if ( alphaVal )
{
Var *outColor = (Var*)LangElement::find( getOutputTargetVarName( DefaultTarget ) );
meta->addStatement( new GenOp( " @.ba = float2( 0, @ ); // MFT_IsTranslucentZWrite\r\n", outColor, alphaVal ) );
}
output = meta;
}
