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  • UE3植被工具-支持刷Actor）

    【目标】

    植被工具-刷Actor

    【思路】

    1 添加类型FFoliageMeshInfo.AddInstance 的函数

     

     

    2 添加Instance就直接SpawnActor

     

     

    3 类结构


     

    4 修改的函数

    FEdModeFoliage.AddInstancesForBrush.

     

    FEdModeFoliage.AddFoliageMesh 

     

     

     

     

    【步骤】

    1 添加AcheType支持，添加FEdModeFoliage.AddFoliageAcheType 

     

     

    2 添加一个AActor的表，用于记录ArcheType

     

    1. var    const native Map_MirrorFoliageArcheTypes{TMap<classAActor*,structFFoliageMeshInfo>};
     

     

    3 MFoliageEditWindow.OnDrop，资源拖到面板上

     

    1. else
{
AActor*ArcheTypeActor=LoadObject<AActor>(NULL,*CurInfo.ObjectPathName, NULL, LOAD_None, NULL);
if(ArcheTypeActor&&ArchetypeActor->HasAnyFlags(RF_ArchetypeObject))
{
FoliageEditSystem->AddFoliageAcheType(ArcheTypeActor);
FoliageMeshesProperty->NotifyChanged();
}
}
     
    MFoliageEditWindow.OnDragOver 过滤不支持的类型，添加Actor类型的支持
    1. for(TArray<FSelectedAssetInfo>::TConstIteratorDroppedAssetsIter(*(DroppedAssets.Get()));DroppedAssetsIter;++DroppedAssetsIter)
{
constFSelectedAssetInfo&CurInfo=*DroppedAssetsIter;
if(CurInfo.ObjectClass!=UStaticMesh::StaticClass()&&CurInfo.ObjectClass!=AActor::StaticClass())
{
Args->Effects=DragDropEffects::None;
break;
}
    还是拖不上去
    在MFoliageEditWindow.OnDragEnter 中有
     
     
     
    需要设置这个才能调试
     
     

    4 MFoliageEditWindow.OnDragOver 改成 IsChildOf 判断

     

    1. voidOnDragOver(Object^Owner,DragEventArgs^Args)
{
Args->Effects=DragDropEffects::Copy;
if(DroppedAssets.Get()!= NULL )
{
for(TArray<FSelectedAssetInfo>::TConstIteratorDroppedAssetsIter(*(DroppedAssets.Get()));DroppedAssetsIter;++DroppedAssetsIter)
{
constFSelectedAssetInfo&CurInfo=*DroppedAssetsIter;
if(CurInfo.ObjectClass!=UStaticMesh::StaticClass()&&!CurInfo.ObjectClass->IsChildOf(AActor::StaticClass()))
{
Args->Effects=DragDropEffects::None;
break;
}
}
}
Args->Handled= TRUE;
}
     

     

    5 目前拖上去没有效果显示，

    MFoliageMeshWrapper 


    列表和FEdModeFoliage.GetFoliageMeshList 绑定了，所以显示了FFoliageMeshUIInfo列表

     

     

    6 添加FFoliageArcheTypeUIInfo 继承于FFoliageMeshUIInfo 

     

    1. 1 structFFoliageResourceUIInfo:publicFFoliageMeshUIInfo
2 {
3 AActor*ArcheTypeActor;
4 FFoliageResourceUIInfo(UStaticMesh*InStaticMesh,AActor*InArcheTypeActor,FFoliageMeshInfo*InMeshInfo)
5 :FFoliageMeshUIInfo(InStaticMesh,InMeshInfo)
6 :ArcheTypeActor(InArcheTypeActor)
7 {}
8 };
     

     

    7 FEdModeFoliage.GetFoliageMeshList 返回值

     

    1. 1 TArray<structFFoliageResourceUIInfo>&GetFoliageMeshList();
     

    8 FEdModeFoliage.FoliageMeshList 

     

    1. // Placed level data
TArray<structFFoliageResourceUIInfo>FoliageMeshList;
     

    9

     

    1. 1 IMPLEMENT_COMPARE_CONSTREF(FFoliageResourceUIInfo,FoliageEdMode,{return A.MeshInfo->Settings->DisplayOrder- B.MeshInfo->Settings->DisplayOrder;});
     

    10 FEdModeFoliage.UpdateFoliageMeshList 

     

    1.  1 voidFEdModeFoliage::UpdateFoliageMeshList()
 2 {
 3 FoliageMeshList.Empty();
 4 AInstancedFoliageActor* IFA =AInstancedFoliageActor::GetInstancedFoliageActor();
 5 for(TMap<classUStaticMesh*,structFFoliageMeshInfo>::TIteratorMeshIt(IFA->FoliageMeshes);MeshIt;++MeshIt)
 6 {
 7 new(FoliageMeshList)FFoliageResourceUIInfo(MeshIt.Key(),NULL,&MeshIt.Value());
 8 }
 9 for(TMap<classAActor*,structFFoliageMeshInfo>::TIteratorArcheTypeIt(IFA->FoliageArcheTypes);ArcheTypeIt;++ArcheTypeIt)
10 {
11 new(FoliageArcheTypeList)FFoliageResourceUIInfo(NULL,ArcheTypeIt.Key(),&ArcheTypeIt.Value());
12 }
13 Sort<USE_COMPARE_CONSTREF(FFoliageResourceUIInfo,FoliageEdMode)>(&FoliageMeshList(0),FoliageMeshList.Num());
14 }
     

    11 MFoliageMeshWrapper 类构造需要用新类FFoliageResourceUIInfo 

     

    1.  1 ref classMFoliageMeshWrapper:publicINotifyPropertyChanged
 2 {
 3 int index;
 4 FFoliageResourceUIInfo& mesh;
 5 UInstancedFoliageSettings* settings;
 6 BitmapSource^ bitmap;
 7 public:
 8 virtual event PropertyChangedEventHandler^PropertyChanged;
 9 MFoliageMeshWrapper( INT InIndex,FFoliageResourceUIInfo&InMesh)
10 :    index(InIndex)
11 ,    mesh(InMesh)
12 ,    settings(mesh.MeshInfo->Settings)
13 {
14 if(mesh.StaticMesh)
15 bitmap =ThumbnailToolsCLR::GetBitmapSourceForObject(mesh.StaticMesh);
16 elseif(mesh.ArcheTypeActor)
17 bitmap =ThumbnailToolsCLR::GetBitmapSourceForObject(mesh.ArcheTypeActor);
18 }
     

    12

     

    1. typedefMEnumerableTArrayWrapper<MFoliageMeshWrapper,FFoliageResourceUIInfo>MFoliageMeshes;
     
    终于看到效果了
     

    13 跟FFoliageMeshUIInfo.StaticMesh 相关的修改

    MFoliageMeshWrapper.StaticMeshName.get  获取名字的

     

    1. 1 propertyString^StaticMeshName{
2 String^ get()
3 {
4 FStringName= mesh.StaticMesh? mesh.StaticMesh->GetName()? mesh.ArcheTypeActor->GetName();
5 returnCLRTools::ToString(Name);
6 }
7 }
     
    MFoliageEditWindow.FoliageMeshRemoveButton_Click 
    1.  1 // Remove the current mesh
 2 voidFoliageMeshRemoveButton_Click(Object^Owner,ExecutedRoutedEventArgs^Args)
 3 {
 4 MFoliageMeshWrapper^Mesh= safe_cast<MFoliageMeshWrapper^>(Args->Parameter);
 5 if(Mesh->GetStaticMesh())
 6 FoliageEditSystem->RemoveFoliageMesh(Mesh->GetStaticMesh());
 7 else
 8 FoliageEditSystem->RemoveFoliageAcheType(Mesh->GetArcheTypeActor());
 9 FoliageMeshesProperty->NotifyChanged();
10 }
     
     

    添加MFoliageMeshWrapper.GetStaticMesh 

     

    1. AActor*GetStaticMesh(){return mesh.ArcheTypeActor;}
     

    MFoliageEditWindow.FoliageMeshCopySettings_Click 

     

    1. voidFoliageMeshUseSettings_Click(Object^Owner,ExecutedRoutedEventArgs^Args)
{
GCallbackEvent->Send(CALLBACK_LoadSelectedAssetsIfNeeded);
USelection*SelectedSet=GEditor->GetSelectedSet(UInstancedFoliageSettings::StaticClass());
UInstancedFoliageSettings*SelectedSettings=Cast<UInstancedFoliageSettings>(SelectedSet->GetTop(UInstancedFoliageSettings::StaticClass()));
if(SelectedSettings!= NULL )
{
MFoliageMeshWrapper^Mesh= safe_cast<MFoliageMeshWrapper^>(Args->Parameter);
if(Mesh->GetStaticMesh())
FoliageEditSystem->ReplaceSettingsObject(Mesh->GetStaticMesh(),SelectedSettings);
else
FoliageEditSystem->ReplaceSettingsObject(Mesh->GetArcheTypeActor(),SelectedSettings);
     
    MFoliageEditWindow.FoliageMeshReplaceButton_Click 
    1. if(SelectedActor&&SelectedActor->HasAnyFlags(RF_ArchetypeObject))
{
MFoliageMeshWrapper^Mesh= safe_cast<MFoliageMeshWrapper^>(Args->Parameter);
FoliageEditSystem->ReplaceArchtypeActor(Mesh->GetArcheTypeActor(),SelectedActor);
FoliageMeshesProperty->NotifyChanged();
}
     

     

     

    13 FEdModeFoliage.ReplaceArchtypeActor 

     

    1.  1 voidFEdModeFoliage::ReplaceArchtypeActor(AActor*OldArcheType,AActor*NewArcheType)
 2 {
 3 AInstancedFoliageActor* IFA =AInstancedFoliageActor::GetInstancedFoliageActor();
 4 FFoliageMeshInfo*OldMeshInfo= IFA->FoliageArcheTypes.Find(OldArcheType);
 5 if(OldMeshInfo!= NULL &&OldArcheType!=NewArcheType&&NewArcheType->HasAnyFlags(RF_ArchetypeObject))
 6 {
 7 INT InstancesNum=OldMeshInfo->Instances.Num()-OldMeshInfo->FreeInstanceIndices.Num();
 8 // Look for the new mesh in the mesh list, and either create a new mesh or merge the instances.
 9 FFoliageMeshInfo*NewMeshInfo= IFA->FoliageArcheTypes.Find(NewArcheType);
10 if(NewMeshInfo== NULL )
11 {
12 if(InstancesNum>0&&
13 appMsgf(AMT_YesNo,LocalizeSecure(LocalizeUnrealEd("FoliageMode_ReplaceMesh"),InstancesNum,*OldArcheType->GetName(),*NewArcheType->GetName()))!= ART_Yes )
14 {
15 return;
16 }
17 GEditor->BeginTransaction(*LocalizeUnrealEd("FoliageMode_ChangeStaticMeshTransaction"));
18 IFA->Modify();
19 NewMeshInfo= IFA->AddArcheType(NewArcheType);
20 NewMeshInfo->Settings->DisplayOrder=OldMeshInfo->Settings->DisplayOrder;
21 NewMeshInfo->Settings->ShowNothing=OldMeshInfo->Settings->ShowNothing;
22 NewMeshInfo->Settings->ShowPaintSettings=OldMeshInfo->Settings->ShowPaintSettings;
23 NewMeshInfo->Settings->ShowInstanceSettings=OldMeshInfo->Settings->ShowInstanceSettings;
24 }
25 else
26 if(InstancesNum>0&&
27 appMsgf(AMT_YesNo,LocalizeSecure(LocalizeUnrealEd("FoliageMode_ReplaceMeshMerge"),InstancesNum,*OldArcheType->GetName(),*NewArcheType->GetName()))!= ART_Yes )
28 {
29 return;
30 }
31 else
32 {
33 GEditor->BeginTransaction(*LocalizeUnrealEd("FoliageMode_ChangeStaticMeshTransaction"));
34 IFA->Modify();
35 }
36 if(InstancesNum>0)
37 {
38 // copy instances from old to new.
39 for( INT Idx=0;Idx<OldMeshInfo->Instances.Num();Idx++)
40 {
41 if(OldMeshInfo->Instances(Idx).ClusterIndex!=-1)
42 {
43 NewMeshInfo->AddInstanceAT( IFA,NewArcheType,OldMeshInfo->Instances(Idx));
44 }
45 }
46 }
47 // Remove the old mesh.
48 IFA->RemoveArcheType(OldArcheType);
49 GEditor->EndTransaction();
50 // Update mesh list.
51 UpdateFoliageMeshList();
52 }
53 }
     

     

    14 添加FFoliageMeshInfo.AddInstanceAT 

     

    1. 1 voidFFoliageMeshInfo::AddInstanceAT(classAInstancedFoliageActor*InIFA,classAActor*InActor,constFFoliageInstance&InNewInstance)
2 {
3 }
     

     

    目前是刷不上Actor模型吗，主要是FEdModeFoliage.ApplyBrush 函数里没有处理

    15 修改FEdModeFoliage.ApplyBrush 

     

    1.  1 // ArcheType
 2 for(TMap<classAActor*,structFFoliageMeshInfo>::TIteratorArcheTypeIt(IFA->FoliageArcheTypes);ArcheTypeIt;++ArcheTypeIt)
 3 {
 4 FFoliageMeshInfo&MeshInfo=ArcheTypeIt.Value();
 5 UInstancedFoliageSettings*MeshSettings=MeshInfo.Settings;
 6 if(MeshSettings->IsSelected)
 7 {
 8 // Find the instances already in the area.
 9 TArray<INT>Instances;
10 FSphereBrushSphere(BrushLocation,UISettings.GetRadius());
11 MeshInfo.GetInstancesInsideSphere(BrushSphere,Instances);
12 if(UISettings.GetLassoSelectToolSelected())
13 {
14 // Shift unpaints
15 MeshInfo.SelectInstances( IFA,!IsShiftDown(ViewportClient->Viewport),Instances);
16 }
17 else
18 if(UISettings.GetReapplyToolSelected())
19 {
20 if(MeshSettings->ReapplyDensity)
21 {
22 // Adjust instance density
23 FMeshInfoSnapshot*SnapShot=InstanceATSnapshot.Find(ArcheTypeIt.Key());
24 if(SnapShot)
25 {
26 // Use snapshot to determine number of instances at the start of the brush stroke
27 INT NewInstanceCount= appRound((FLOAT)SnapShot->CountInstancesInsideSphere(BrushSphere)*MeshSettings->ReapplyDensityAmount);
28 if(MeshSettings->ReapplyDensityAmount>1.f&&NewInstanceCount>Instances.Num())
29 {
30 AddInstancesATForBrush( IFA,ArcheTypeIt.Key(),MeshInfo,NewInstanceCount,Instances,Pressure);
31 }
32 else
33 if(MeshSettings->ReapplyDensityAmount<1.f&&NewInstanceCount<Instances.Num())
34 {
35 RemoveInstancesForBrush( IFA,MeshInfo,NewInstanceCount,Instances,Pressure);
36 }
37 }
38 }
39 // Reapply any settings checked by the user
40 ReapplyInstancesForBrush( IFA,MeshInfo,Instances);
41 }
42 else
43 if(UISettings.GetPaintToolSelected())
44 {
45 // Shift unpaints
46 if(IsShiftDown(ViewportClient->Viewport))
47 {
48 INT DesiredInstanceCount= appRound(BrushArea*MeshSettings->Density*UISettings.GetUnpaintDensity()/(1000.f*1000.f));
49 if(DesiredInstanceCount<Instances.Num())
50 {
51 RemoveInstancesForBrush( IFA,MeshInfo,DesiredInstanceCount,Instances,Pressure);
52 }
53 }
54 else
55 {
56 // This is the total set of instances disregarding parameters like slope, height or layer.
57 FLOAT DesiredInstanceCountFloat=BrushArea*MeshSettings->Density*UISettings.GetPaintDensity()/(1000.f*1000.f);
58 // Allow a single instance with a random chance, if the brush is smaller than the density
59 INT DesiredInstanceCount=DesiredInstanceCountFloat>1.f? appRound(DesiredInstanceCountFloat): appFrand()<DesiredInstanceCountFloat?1:0;
60 AddInstancesATForBrush( IFA,ArcheTypeIt.Key(),MeshInfo,DesiredInstanceCount,Instances,Pressure);
61 }
62 }
63 }
64 }
     

     

    16 添加Instance的函数FEdModeFoliage.AddInstancesATForBrush 

     

    1.   1 /** Add instances inside the brush to match DesiredInstanceCount */
  2 voidFEdModeFoliage::AddInstancesATForBrush(AInstancedFoliageActor* IFA,AActor*AchetypeActor,FFoliageMeshInfo&MeshInfo, INT DesiredInstanceCount,TArray<INT>&ExistingInstances, FLOAT Pressure)
  3 {
  4 UInstancedFoliageSettings*MeshSettings=MeshInfo.Settings;
  5 if(DesiredInstanceCount>ExistingInstances.Num())
  6 {
  7 INT ExistingInstanceBuckets[NUM_INSTANCE_BUCKETS];
  8 appMemzero(ExistingInstanceBuckets,sizeof(ExistingInstanceBuckets));
  9 // Cache store mapping between component and weight data
 10 TMap<ULandscapeComponent*,TArray<BYTE>>*LandscapeLayerCache= NULL;
 11 FNameLandscapeLayerName=MeshSettings->LandscapeLayer;
 12 if(LandscapeLayerName!= NAME_None )
 13 {
 14 LandscapeLayerCache=&LandscapeLayerCaches.FindOrAdd(LandscapeLayerName);
 15 // Find the landscape weights of existing ExistingInstances
 16 for( INT Idx=0;Idx<ExistingInstances.Num();Idx++)
 17 {
 18 FFoliageInstance&Instance=MeshInfo.Instances(ExistingInstances(Idx));
 19 ULandscapeHeightfieldCollisionComponent*HitLandscapeCollision=Cast<ULandscapeHeightfieldCollisionComponent>(Instance.Base);
 20 if(HitLandscapeCollision)
 21 {
 22 ULandscapeComponent*HitLandscape=HitLandscapeCollision->GetLandscapeComponent();
 23 if(HitLandscape)
 24 {
 25 TArray<BYTE>*LayerCache=&LandscapeLayerCache->FindOrAdd(HitLandscape);
 26 FLOAT HitWeight=HitLandscape->GetLayerWeightAtLocation(Instance.Location,LandscapeLayerName,LayerCache);
 27 // Add count to bucket.
 28 ExistingInstanceBuckets[appRound(HitWeight*(FLOAT)(NUM_INSTANCE_BUCKETS-1))]++;
 29 }
 30 }
 31 }
 32 }
 33 else
 34 {
 35 // When not tied to a layer, put all the ExistingInstances in the last bucket.
 36 ExistingInstanceBuckets[NUM_INSTANCE_BUCKETS-1]=ExistingInstances.Num();
 37 }
 38 // We calculate a set of potential ExistingInstances for the brush area.
 39 TArray<FPotentialInstance>PotentialInstanceBuckets[NUM_INSTANCE_BUCKETS];
 40 appMemzero(PotentialInstanceBuckets,sizeof(PotentialInstanceBuckets));
 41 // Quick lookup of potential instance locations, used for overlapping check.
 42 TArray<FVector>PotentialInstanceLocations;
 43 FFoliageInstanceHashPotentialInstanceHash(7);// use 128x128 cell size, as the brush radius is typically small.
 44 PotentialInstanceLocations.Empty(DesiredInstanceCount);
 45 // Radius where we expect to have a single instance, given the density rules
 46 const FLOAT DensityCheckRadius=Max<FLOAT>( appSqrt((1000.f*1000.f)/(PI *MeshSettings->Density)),MeshSettings->Radius);
 47 for( INT DesiredIdx=0;DesiredIdx<DesiredInstanceCount;DesiredIdx++)
 48 {
 49 FVectorStart,End;
 50 GetRandomVectorInBrush(Start,End);
 51 FCheckResultHit;
 52 if(!GWorld->SingleLineCheck(Hit, NULL,End,Start, TRACE_World | TRACE_Level,FVector(0.f,0.f,0.f), NULL))
 53 {
 54 // Check filters
 55 if((Hit.Component&&
 56 (Hit.Component->GetOutermost()!=GWorld->CurrentLevel->GetOutermost()||
 57 (!UISettings.bFilterLandscape &&Hit.Component->IsA(ULandscapeHeightfieldCollisionComponent::StaticClass()))||
 58 (!UISettings.bFilterStaticMesh &&Hit.Component->IsA(UStaticMeshComponent::StaticClass()))||
 59 (!UISettings.bFilterTerrain &&Hit.Component->IsA(UTerrainComponent::StaticClass()))))||
 60 (Hit.Actor&&Hit.Actor->IsA(AWorldInfo::StaticClass())&&(!UISettings.bFilterBSP ||GWorld->Levels(Hit.LevelIndex)!=GWorld->CurrentLevel)))
 61 {
 62 continue;
 63 }
 64 if(!CheckLocationForPotentialInstance(MeshInfo,MeshSettings,DensityCheckRadius,Hit.Location,Hit.Normal,PotentialInstanceLocations,PotentialInstanceHash))
 65 {
 66 continue;
 67 }
 68 // Check landscape layer
 69 FLOAT HitWeight=1.f;
 70 if(LandscapeLayerName!= NAME_None )
 71 {
 72 ULandscapeHeightfieldCollisionComponent*HitLandscapeCollision=Cast<ULandscapeHeightfieldCollisionComponent>(Hit.Component);
 73 if(HitLandscapeCollision)
 74 {
 75 ULandscapeComponent*HitLandscape=HitLandscapeCollision->GetLandscapeComponent();
 76 if(HitLandscape)
 77 {
 78 TArray<BYTE>*LayerCache=&LandscapeLayerCache->FindOrAdd(HitLandscape);
 79 HitWeight=HitLandscape->GetLayerWeightAtLocation(Hit.Location,LandscapeLayerName,LayerCache);
 80 // Reject instance randomly in proportion to weight
 81 if(HitWeight<= appFrand())
 82 {
 83 continue;
 84 }
 85 }
 86 }
 87 }
 88 new(PotentialInstanceBuckets[appRound(HitWeight*(FLOAT)(NUM_INSTANCE_BUCKETS-1))])FPotentialInstance(Hit.Location,Hit.Normal,Hit.Component,HitWeight);
 89 }
 90 }
 91 for( INT BucketIdx=0;BucketIdx< NUM_INSTANCE_BUCKETS;BucketIdx++)
 92 {
 93 TArray<FPotentialInstance>&PotentialInstances=PotentialInstanceBuckets[BucketIdx];
 94 FLOAT BucketFraction=(FLOAT)(BucketIdx+1)/(FLOAT)NUM_INSTANCE_BUCKETS;
 95 // We use the number that actually succeeded in placement (due to parameters) as the target
 96 // for the number that should be in the brush region.
 97 INT AdditionalInstances=Clamp<INT>( appRound(BucketFraction*(FLOAT)(PotentialInstances.Num()-ExistingInstanceBuckets[BucketIdx])*Pressure),0,PotentialInstances.Num());
 98 for( INT Idx=0;Idx<AdditionalInstances;Idx++)
 99 {
100 FFoliageInstanceInst=PotentialInstances(Idx).PlaceInstance(MeshSettings);
101 MeshInfo.AddInstanceAT( IFA,AchetypeActor,Inst);
102 }
103 }
104 }
105 }
     
    17 在FFoliageInstanceCluster 上添加Actor列表成员

     

    1.  1 structFFoliageInstanceCluster
 2 {
 3 UInstancedStaticMeshComponent*ClusterComponent;
 4 TArray<AActor*>ActorInstances;
 5 FFoliageInstanceCluster.GetInstanceCount 
 6 INT GetInstanceCount()
 7 {
 8 INT TotalCount=0;
 9 if(ClusterComponent)
10 TotalCount+=ClusterComponent->PerInstanceSMData.Num();
11 TotalCount+=ActorInstances.Num();
12 }
     
     

     

    18 添加FFoliageMeshInfo.AddInstanceAT 

    1.  1 voidFFoliageMeshInfo::AddInstanceAT(classAInstancedFoliageActor*InIFA,classAActor*InArchetypeActor,constFFoliageInstance&InNewInstance)
 2 {
 3 InIFA->Modify();
 4 // Add the instance taking either a free slot or adding a new item.
 5 INT InstanceIndex=FreeInstanceIndices.Num()>0?FreeInstanceIndices.Pop():Instances.Add();
 6 FFoliageInstance&AddedInstance=Instances(InstanceIndex);
 7 AddedInstance=InNewInstance;
 8 // Add the instance to the hash
 9 InstanceHash->InsertInstance(InNewInstance.Location,InstanceIndex);
10 FFoliageComponentHashInfo&ComponentHashInfo=ComponentHash.FindOrAddKey(InNewInstance.Base);
11 ComponentHashInfo.Instances.Add(InstanceIndex);
12 // Find the best cluster to allocate the instance to.
13 FFoliageInstanceCluster*BestCluster= NULL;
14 INT BestClusterIndex= INDEX_NONE;
15 FLOAT BestClusterDistSq= FLT_MAX;
16 INT MaxInstancesPerCluster=Settings->MaxInstancesPerCluster;
17 FLOAT MaxClusterRadiusSq=Square(Settings->MaxClusterRadius);
18 for( INT ClusterIdx=0;ClusterIdx<InstanceClusters.Num();ClusterIdx++)
19 {
20 FFoliageInstanceCluster&Cluster=InstanceClusters(ClusterIdx);
21 if(Cluster.InstanceIndices.Num()<MaxInstancesPerCluster)
22 {
23 FLOAT DistSq=(Cluster.Bounds.Origin-InNewInstance.Location).SizeSquared();
24 if(DistSq<BestClusterDistSq&&DistSq<MaxClusterRadiusSq)
25 {
26 BestCluster=&Cluster;
27 BestClusterIndex=ClusterIdx;
28 BestClusterDistSq=DistSq;
29 }
30 }
31 }
32 // Calculate transform for the instance
33 FMatrixInstanceTransform=InNewInstance.GetInstanceTransform();
34 if(BestCluster== NULL )
35 {
36 BestClusterIndex=InstanceClusters.Num();
37 BestCluster=new(InstanceClusters)FFoliageInstanceCluster(
38 NULL,
39 FBoxSphereBounds()// LWF_TODO
40 );
41 //ApplyInstancedFoliageSettings( BestCluster->ClusterComponent );
42 }
43 else
44 {
45 // BestCluster->ClusterComponent->Modify();
46 // BestCluster->ClusterComponent->InvalidateLightingCache();
47 // BestCluster->Bounds = BestCluster->Bounds + InMesh->Bounds.TransformBy(InstanceTransform);
48 }
49 BestCluster->InstanceIndices.AddItem(InstanceIndex);
50 // Save the cluster index
51 AddedInstance.ClusterIndex=BestClusterIndex;
52 // Add the instance to the ActorList
53 AActor* pActor =GWorld->SpawnActor(InArchetypeActor->GetClass(), NAME_None,InNewInstance.Location,InNewInstance.Rotation,InArchetypeActor);// Spawn Actor
54 BestCluster->ActorInstances.AddItem(pActor);
55 // FInstancedStaticMeshInstanceData* NewInstanceData = new(BestCluster->ClusterComponent->PerInstanceSMData) FInstancedStaticMeshInstanceData();
56 if(BestCluster->ClusterComponent->SelectedInstances.Num()>0)
57 {
58 BestCluster->ClusterComponent->SelectedInstances.AddItem(FALSE);
59 }
60 // NewInstanceData->Transform = InstanceTransform;
61 // NewInstanceData->LightmapUVBias = FVector2D( -1.0f, -1.0f );
62 // NewInstanceData->ShadowmapUVBias = FVector2D( -1.0f, -1.0f );
63 // BestCluster->ClusterComponent->bNeedsReattach = TRUE;
64 #if _DEBUG
65 CheckValid();
66 #endif
67 InIFA->ConditionalUpdateComponents();
68 }
     

     

     

     

    18 修改所有FFoliageInstanceCluster.ClusterComponent 的地方

    太多地方了

     

    FFoliageMeshInfo.CheckValid 

     

    终于能刷出东西来了


     

     
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  • 原文地址：https://www.cnblogs.com/username/p/5821186.html
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