300 lines
11 KiB
Ucode
300 lines
11 KiB
Ucode
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/**
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* Copyright 1998-2013 Epic Games, Inc. All Rights Reserved.
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*/
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/**
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* Utility component for drawing an interactive body of fluid.
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* Origin is at the component location.
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*/
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class FluidSurfaceComponent extends PrimitiveComponent
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native(Fluid)
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AutoExpandCategories(FluidSurfaceComponent,Fluid,FluidDetail)
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hidecategories(Object)
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dependson(LightmassPrimitiveSettingsObject)
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editinlinenew;
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/** Surface material */
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var() materialinterface FluidMaterial;
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/** Resolution of the fluid's texture lightmap. */
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var(Lighting) int LightmapResolution;
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/** The Lightmass settings for this object. */
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var(Lightmass) LightmassPrimitiveSettings LightmassSettings <ScriptOrder=true>;
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/** Whether the vertex positions in the simulation grid should be animated or not */
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var(Fluid) bool EnableSimulation;
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/** Number of quads in the simulated grid (along the X-axis) */
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var(Fluid) int SimulationQuadsX;
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/** Number of quads in the simulated grid (along the Y-axis) */
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var(Fluid) int SimulationQuadsY;
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/** The size of a grid cell in the vertex simulation (in world space units) */
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var(Fluid) float GridSpacing;
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/** Fluids automatically draw a low-resolution grid when they are deactivated. A reasonable value is needed for vertex fogging to work when the fluid is translucent. A maximum of 65000 vertices are allowed before GridSpacingLowRes is clamped. */
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var(Fluid) float GridSpacingLowRes;
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/** Target actor which the simulation grid will center around. If none is provided, the simulation grid will center around the active camera. */
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var(Fluid) actor TargetSimulation;
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/** How much the GPU should tessellate the fluid grid. (Only used on platforms that completely supports GPU tessellation.) */
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var(Fluid) float GPUTessellationFactor;
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/** How much to dampen the amplitude of waves in the fluid (0.0-30.0) */
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var(Fluid) float FluidDamping;
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/** Wave travel speed factor for the simulation grid (0.0-1.0) */
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var(Fluid) float FluidTravelSpeed;
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/** Wave height scale - higher value produces higher waves */
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var(Fluid) float FluidHeightScale;
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/** Fluid update rate in number of updates per second */
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var(Fluid) float FluidUpdateRate;
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/** How much ripple to make when fluid is hit by a weapon or touched by a object for the first time. */
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var(Fluid) float ForceImpact;
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/** How much ripple to make when an Actor moves through the fluid. */
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var(Fluid) float ForceContinuous;
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/** Increasing this value adds more contrast to the lighting by exaggerating the curvature for the fluid normals. */
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var(Fluid) float LightingContrast;
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/** Target actor which the detail texture will center around. If none is provided, the detail texture will center around the active camera. */
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var(Fluid) actor TargetDetail;
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/** Whether the detail simulation grid should be used or not */
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var(Fluid) bool EnableDetail;
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/** Distance between the camera and the closest fluid edge where the fluid will deactivate and start rendering as a simple flat quad. */
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var(Fluid) float DeactivationDistance;
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/** Number of simulation cells along each axis in the detail texture */
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var(FluidDetail) int DetailResolution;
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/** World space size of one edge of the detail texture */
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var(FluidDetail) float DetailSize;
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/** How much to dampen the amplitude of waves in the detail texture (0.0-30.0) */
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var(FluidDetail) float DetailDamping;
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/** Wave travel speed factor for the detail texture (0.0-1.0) */
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var(FluidDetail) float DetailTravelSpeed;
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/** How much of an applied force should be transferred to the detail texture (0.0-1.0) */
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var(FluidDetail) float DetailTransfer;
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/** Wave height scale for the detail texture - higher value produces higher waves */
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var(FluidDetail) float DetailHeightScale;
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/** Fluid update rate in number of updates per second */
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var(FluidDetail) float DetailUpdateRate;
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/** Whether to make the detail simulation tiled. */
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var(FluidDetail) bool bTiling;
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/** Whether to update the fluid or pause it */
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var(FluidDebug) transient bool bPause;
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/** Whether to render lines for normals */
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var(FluidDebug) transient bool bShowSimulationNormals;
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/** Whether to visualize the placement of the simulated grid */
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var(FluidDebug) bool bShowSimulationPosition;
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/** The length of the visualized normals, when bShowSimulationNormals is turned on */
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var(FluidDebug) float NormalLength;
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/** Whether to render an overlay of the detail normal for debugging */
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var(FluidDebug) bool bShowDetailNormals;
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/** Whether to visualize the placement of the detail texture */
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var(FluidDebug) bool bShowDetailPosition;
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/** Whether to visualize the height of the main fluid grid */
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var(FluidDebug) transient bool bShowFluidSimulation;
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/** Whether to show the detail normalmap on the fluid */
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var(FluidDebug) transient bool bShowFluidDetail;
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/** Whether to enable a force for debugging */
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var(FluidDebug) bool bTestRipple;
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/** Whether the test ripple should center on the detail texture or the main grid. */
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var(FluidDebug) bool bTestRippleCenterOnDetail;
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/** Angular speed of the test ripple */
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var(FluidDebug) float TestRippleSpeed;
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/** Number of seconds between each pling on the test ripple. 0 makes it continuous. */
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var(FluidDebug) float TestRippleFrequency;
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/** Radius of the test ripple, in world space */
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var(FluidDebug) float TestRippleRadius;
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var private float FluidWidth;
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var private float FluidHeight;
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var private native transient float TestRippleTime;
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var private native transient float TestRippleAngle;
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var private native transient float DeactivationTimer;
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var private native transient float ViewDistance;
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var private native transient vector SimulationPosition;
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var private native transient vector DetailPosition;
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/** Stores a 1 for each clamped vertex that should not be simulated, and a 0 for each vertex that should be simulated. */
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var const array<byte> ClampMap;
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var private const array<ShadowMap2D> ShadowMaps;
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/** Reference to the texture lightmap resource. */
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var native private const LightMapRef LightMap;
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/** All transient member variables are contained inside the FFluidSurfaceInfo object. */
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var private native transient const pointer FluidSimulation{class FFluidSimulation};
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/** Apply a force to the fluid. */
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native final function ApplyForce( vector WorldPos, float Strength, float Radius, optional bool bImpulse );
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/** Set the position of the origin of the detail texture, within the fluid. */
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native final function SetDetailPosition( vector WorldPos );
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/** Set the position of the origin of the simulation grid, within the fluid. */
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native final function SetSimulationPosition( vector WorldPos );
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cpptext
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{
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public:
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UFluidSurfaceComponent();
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UMaterialInterface* GetMaterial() const;
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FMaterialViewRelevance GetMaterialViewRelevance() const;
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const class FFluidGPUResource* GetFluidGPUResource() const;
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void InitResources( UBOOL bActive );
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void ReleaseResources( UBOOL bBlockOnRelease );
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void RebuildClampMap();
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void OnScaleChange();
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// Base class interfaces.
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virtual FPrimitiveSceneProxy* CreateSceneProxy();
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virtual void Serialize(FArchive& Ar);
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virtual void AddReferencedObjects(TArray<UObject*>& ObjectArray);
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virtual void UpdateBounds();
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virtual void Attach();
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virtual void Detach( UBOOL bWillReattach );
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virtual void PreEditChange(UProperty* PropertyAboutToChange);
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virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent);
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virtual void BeginDestroy();
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virtual UBOOL IsReadyForFinishDestroy();
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virtual void FinishDestroy();
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virtual void Tick(FLOAT DeltaTime);
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virtual UBOOL LineCheck(FCheckResult& Result, const FVector& End, const FVector& Start, const FVector& Extent, DWORD TraceFlags);
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virtual UBOOL PointCheck(FCheckResult& Result,const FVector& Location,const FVector& Extent,DWORD TraceFlags);
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virtual void InvalidateLightingCache();
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/**
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* Retrieves the materials used in this component
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*
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* @param OutMaterials The list of used materials.
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*/
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virtual void GetUsedMaterials( TArray<UMaterialInterface*>& OutMaterials ) const;
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/**
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* Returns the lightmap resolution used for this primivite instnace in the case of it supporting texture light/ shadow maps.
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* 0 if not supported or no static shadowing.
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*
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* @param Width [out] Width of light/shadow map
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* @param Height [out] Height of light/shadow map
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*
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* @return UBOOL TRUE if LightMap values are padded, FALSE if not
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*/
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virtual UBOOL GetLightMapResolution( INT& Width, INT& Height ) const;
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virtual INT GetStaticLightMapResolution() const;
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virtual void GetLightAndShadowMapMemoryUsage( INT& LightMapMemoryUsage, INT& ShadowMapMemoryUsage ) const;
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virtual void GetStaticLightingInfo(FStaticLightingPrimitiveInfo& OutPrimitiveInfo,const TArray<ULightComponent*>& InRelevantLights,const FLightingBuildOptions& Options);
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virtual ELightMapInteractionType GetStaticLightingType() const { return LMIT_Texture; }
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/** Gets the emissive boost for the primitive component. */
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virtual FLOAT GetEmissiveBoost(INT ElementIndex) const;
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/** Gets the diffuse boost for the primitive component. */
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virtual FLOAT GetDiffuseBoost(INT ElementIndex) const;
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/** Gets the specular boost for the primitive component. */
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virtual FLOAT GetSpecularBoost(INT ElementIndex) const;
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virtual void GetStreamingTextureInfo(TArray<FStreamingTexturePrimitiveInfo>& OutStreamingTextures) const;
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private:
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UBOOL PropertyNeedsResourceRecreation(UProperty* Property);
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void UpdateMemory(FLOAT DeltaTime);
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/**
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* Calculates the distance from the fluid's edge to the specified position.
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* @param WorldPosition A world-space position to measure the distance to.
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* @return Distance from the fluid's edge to the specified position, or 0 if it's inside the fluid.
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*/
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FLOAT CalcDistance( const FVector& WorldPosition );
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}
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defaultproperties
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{
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LightmapResolution=128
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EnableSimulation=true
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EnableDetail=true
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DeactivationDistance=3000.0
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FluidUpdateRate=30.0
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DetailUpdateRate=30.0
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bTiling=false
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FluidHeightScale=1.0
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DetailHeightScale=1.0
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bPause=false
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SimulationQuadsX=200
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SimulationQuadsY=200
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GridSpacing=10.0
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GridSpacingLowRes=800.0
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DetailResolution=256
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DetailSize=500
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FluidDamping=1.0
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FluidTravelSpeed=1.0
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DetailDamping=1.0
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DetailTravelSpeed=1.0
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DetailTransfer=0.5
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bTestRipple=false
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TestRippleSpeed=1
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TestRippleRadius=30
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TestRippleFrequency=1.0
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bShowFluidDetail=true
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bShowFluidSimulation=true
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bShowDetailNormals=false
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bShowDetailPosition=false
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bShowSimulationNormals=false
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bShowSimulationPosition=false
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NormalLength=10.0
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LightingContrast=1.0
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GPUTessellationFactor=1.0
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ForceImpact=-3.0
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ForceContinuous=-200.0
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FluidWidth=2000.0
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FluidHeight=2000.0
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TestRippleTime=0.0
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TestRippleAngle=0.0
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DeactivationTimer=10.0
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ViewDistance=0.0
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bTickInEditor=true
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CollideActors=true
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BlockZeroExtent=true
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BlockNonZeroExtent=true
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BlockRigidBody=false
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CastShadow=false
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bForceDirectLightMap=true
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bAcceptsLights=true
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bUsePrecomputedShadows=true
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// Fluid surfaces often have expensive vertex shaders so we want to make sure they get occlusion queried
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bIgnoreNearPlaneIntersection=true
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}
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