/** Evaluates the graph connected to a pin. */
static int32 EvaluateGraph(FNiagaraCompilerContext& Context, UEdGraphPin* Pin)
{
int32 ExpressionIndex = INDEX_NONE;
if (Pin)
{
if (Pin->LinkedTo.Num() == 1)
{
check(Pin->Direction == EGPD_Input);
Pin = Pin->LinkedTo[0];
check(Pin->Direction == EGPD_Output);
int32* CachedExpressionIndex = Context.PinToExpression.Find(Pin);
if (CachedExpressionIndex)
{
ExpressionIndex = *CachedExpressionIndex;
}
else
{
UEdGraphNode* Node = Pin->GetOwningNode();
if (Node->IsA(UNiagaraNodeOp::StaticClass()))
{
UNiagaraNodeOp* OpNode = (UNiagaraNodeOp*)Node;
VectorVM::FVectorVMOpInfo const& OpInfo = VectorVM::GetOpCodeInfo(OpNode->OpIndex);
FNiagaraExpr NewOp;
NewOp.OpIndex = OpNode->OpIndex;
NewOp.SrcOperandTypeVector = 0;
for (int32 SrcIndex = 0; SrcIndex < 3; ++SrcIndex)
{
if (OpInfo.SrcTypes[SrcIndex] != VectorVM::EOpSrc::Invalid)
{
UEdGraphPin* SrcPin = OpNode->FindPinChecked(UNiagaraNodeOp::InPinNames[SrcIndex]);
NewOp.Src[SrcIndex] = EvaluateGraph(Context,SrcPin);
if (NewOp.Src[SrcIndex] & 0x40000000)
{
NewOp.SrcOperandTypeVector |= (1 << SrcIndex);
}
}
}
ExpressionIndex = Context.Expressions.Add(NewOp);
}
else if (Node->IsA(UNiagaraNodeGetAttr::StaticClass()))
{
UNiagaraNodeGetAttr* AttrNode = (UNiagaraNodeGetAttr*)Node;
int32 AttrIndex = INDEX_NONE;
if (Context.Attributes.Find(AttrNode->AttrName, AttrIndex))
{
ExpressionIndex = AttrIndex | 0x80000000;
}
else if (Context.ConstantNames.Find(AttrNode->AttrName, AttrIndex))
{
ExpressionIndex = AttrIndex | 0x40000000;
}
}
Context.PinToExpression.Add(Pin, ExpressionIndex);
}
}
else if (!Pin->bDefaultValueIsIgnored)
{
FString ConstString = Pin->GetDefaultAsString();
FName ConstName(*ConstString);
int32 ConstIndex = Context.ConstantNames.Find(ConstName);
if (ConstIndex == INDEX_NONE)
{
TArray<FString> ResultString;
ConstString.Trim();
ConstString.TrimTrailing();
ConstString.ParseIntoArray(&ResultString, TEXT(","), true);
ConstIndex = 0;
if (ResultString.Num() == 4)
{
ConstIndex = Context.Constants.Add(FVector4(FCString::Atof(*ResultString[0]), FCString::Atof(*ResultString[1]), FCString::Atof(*ResultString[2]), FCString::Atof(*ResultString[3])));
check(Context.ConstantNames.Num() == ConstIndex);
Context.ConstantNames.Add(ConstName);
}
}
check(Context.Constants.IsValidIndex(ConstIndex));
ExpressionIndex = ConstIndex | 0x40000000;
}
}
return ExpressionIndex;
}
TNiagaraExprPtr FNiagaraCompiler::CompilePin(UEdGraphPin* Pin)
{
check(Pin);
TNiagaraExprPtr Ret;
if (Pin->Direction == EGPD_Input)
{
if (Pin->LinkedTo.Num() > 0)
{
// > 1 ???
Ret = CompileOutputPin(Pin->LinkedTo[0]);
}
else if (!Pin->bDefaultValueIsIgnored)
{
//No connections to this input so add the default as a const expression.
const UEdGraphSchema_Niagara* Schema = Cast<const UEdGraphSchema_Niagara>(Pin->GetSchema());
ENiagaraDataType PinType = Schema->GetPinType(Pin);
FString ConstString = Pin->GetDefaultAsString();
FName ConstName(*ConstString);
FNiagaraVariableInfo Var(ConstName, PinType);
switch (PinType)
{
case ENiagaraDataType::Scalar:
{
float Default;
Schema->GetPinDefaultValue(Pin, Default);
ConstantData.SetOrAddInternal(Var, Default);
}
break;
case ENiagaraDataType::Vector:
{
FVector4 Default;
Schema->GetPinDefaultValue(Pin, Default);
ConstantData.SetOrAddInternal(Var, Default);
}
break;
case ENiagaraDataType::Matrix:
{
FMatrix Default;
Schema->GetPinDefaultValue(Pin, Default);
ConstantData.SetOrAddInternal(Var, Default);
}
break;
case ENiagaraDataType::Curve:
{
FNiagaraDataObject *Default = nullptr;
ConstantData.SetOrAddInternal(Var, Default);
}
break;
}
Ret = Expression_GetInternalConstant(Var);
}
}
else
{
Ret = CompileOutputPin(Pin);
}
return Ret;
}
const unsigned char *PkcsAttribute ( unsigned int Val ) {
return ConstName ( PkcsAttributeInfo, PkcsAttributeSize, Val);
}
const unsigned char *ResponseSeverity( unsigned int Val ) {
return ConstName ( PkcsResponseSeverityInfo, PkcsResponseSeveritySize, Val);
}
const unsigned char *PkcsObject ( unsigned int Val ) {
return ConstName ( PkcsObjectInfo, PkcsObjectSize, Val );
}
const unsigned char *PkcsKey ( unsigned int Val ) {
return ConstName( PkcsKeyInfo, PkcsKeySize, Val);
}
const unsigned char *PkcsFlags ( unsigned int Val ) {
return ConstName( PkcsFlagsInfo, PkcsFlagsSize, Val );
}
const unsigned char *PkcsMechanism ( unsigned int Val) {
return ConstName(PkcsMechanismInfo, PkcsMechanismSize, Val);
}
const unsigned char *PkcsReturn ( unsigned int Val ) {
return ConstName( PkcsReturnInfo, PkcsReturnSize, Val );
}
const unsigned char *SysConst ( unsigned int Val ) {
return ConstName ( SysErrorInfo, SysErrorSize, Val );
}
const unsigned char *ODMConst( unsigned int Val ) {
return ConstName( ODMError, ODMErrorSize, Val);
}
const unsigned char *SignalConst ( unsigned int Val ) {
return ConstName ( SignalInfo, SignalInfoSize, Val );
}
const unsigned char *DAEConst( unsigned int Val ) {
return ConstName( DAEError, DAEErrorSize, Val);
}
