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API > API/Plugins > API/Plugins/Niagara
Inheritance Hierarchy
- UObjectBase
- UObjectBaseUtility
- UObject
- UNiagaraMergeable
- UNiagaraDataInterfaceBase
- UNiagaraDataInterface
- UNiagaraDataInterfaceAsyncGpuTrace
References
| Module | Niagara |
| Header | /Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraDataInterfaceAsyncGpuTrace.h |
| Include | #include "NiagaraDataInterfaceAsyncGpuTrace.h" |
Syntax
UCLASS&40;EditInlineNew, Category&61;"Collision", CollapseCategories,
Meta&61;&40;DisplayName&61;"Async Gpu Trace"&41;, MinimalAPI&41;
class UNiagaraDataInterfaceAsyncGpuTrace : public UNiagaraDataInterface
Remarks
Data interface for handling latent (delayed 1 frame) traces against the scene for GPU simulations.
Variables
| Type | Name | Description | |
|---|---|---|---|
   |
int32 | MaxRetraces | If a collision is rejected, how many times do we attempt to retrace from that collision point forward to find a new, valid collision. |
   |
int32 | MaxTracesPerParticle | The maximum number of traces (per particle) that can be created per frame. |
   |
TEnumAsByte< ENDICollisionQuery_AsyncGpuTraceProvider::Type > | TraceProvider | Defines which technique is used to resolve the trace - see 'AsyncGpuTraceDI/Provider Priority' in the Niagara project settings. |
Constructors
| Type | Name | Description | |
|---|---|---|---|
 |
UNiagaraDataInterfaceAsyncGpuTrace
(
const FObjectInitializer& ObjectInitializer |
Overridden from UNiagaraDataInterface
| Type | Name | Description | |
|---|---|---|---|
   |
bool | AppendCompileHash
(
FNiagaraCompileHashVisitor* InVisitor |
Allows the generic class defaults version of this class to specify any dependencies/version/etc that might invalidate the compile. |
   |
bool | CanExecuteOnTarget
(
ENiagaraSimTarget Target |
|
   |
bool | CopyToInternal
(
UNiagaraDataInterface* Destination |
|
  |
void | DestroyPerInstanceData
(
void* PerInstanceData, |
Destroys the per instance data for this interface. |
  |
void | GetCommonHLSL
(
FString& OutHLSL |
Allows data interfaces to provide common functionality that will be shared across interfaces on that type. |
  |
void | GetFeedback
(
UNiagaraSystem* InAsset, |
Query the data interface to give feedback to the end user. |
  |
bool | GetFunctionHLSL
(
const FNiagaraDataInterfaceGPUParamInfo& ParamInfo, |
|
  |
void | GetFunctions
(
TArray< FNiagaraFunctionSignature >& OutFunctions |
Gets all the available functions for this data interface. |
  |
void | GetParameterDefinitionHLSL
(
const FNiagaraDataInterfaceGPUParamInfo& ParamInfo, |
|
  |
bool | InitPerInstanceData
(
void* PerInstanceData, |
Initializes the per instance data for this interface. |
   |
int32 | Returns the size of the per instance data for this interface. | |
  |
void | ||
   |
bool | ||
   |
bool | ||
   |
void | SetShaderParameters
(
const FNiagaraDataInterfaceSetShaderParametersContext& Context |
Set the shader parameters will only be called if the data interface provided shader parameters. |
  |
bool | UpgradeFunctionCall
(
FNiagaraFunctionSignature& FunctionSignature |
Allows data interfaces the opportunity to rename / change the function signature and perform an upgrade. |
Overridden from UNiagaraDataInterfaceBase
| Type | Name | Description | |
|---|---|---|---|
   |
void | BuildShaderParameters
(
FNiagaraShaderParametersBuilder& ShaderParametersBuilder |
Override this method to provide parameters to the GPU (SRV / UAV / Constants / etc) The most common usage will be to provide a single structure which is nested with other parameters. |
Overridden from UObject
| Type | Name | Description | |
|---|---|---|---|
  |
void | PostEditChangeProperty
(
FPropertyChangedEvent& PropertyChangedEvent |
Called when a property on this object has been modified externally |
  |
void | Called after the C++ constructor and after the properties have been initialized, including those loaded from config. | |
  |
void | PostLoad () |
Do any object-specific cleanup required immediately after loading an object. |