55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
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// Copyright 2020 Phyronnaz
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#include "VoxelSpawners/VoxelSpawnerGroup.h"
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#include "VoxelMessages.h"
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#include "Logging/MessageLog.h"
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#include "Misc/UObjectToken.h"
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#if WITH_EDITOR
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void UVoxelSpawnerGroup::PostEditChangeChainProperty(FPropertyChangedChainEvent& PropertyChangedEvent)
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{
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Super::PostEditChangeChainProperty(PropertyChangedEvent);
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if (bNormalizeProbabilitiesOnEdit &&
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PropertyChangedEvent.Property &&
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(PropertyChangedEvent.ChangeType == EPropertyChangeType::Interactive ||
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PropertyChangedEvent.ChangeType == EPropertyChangeType::ValueSet))
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{
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const int32 EditedIndex = PropertyChangedEvent.GetArrayIndex(GET_MEMBER_NAME_STRING_CHECKED(UVoxelSpawnerGroup, Children));
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if (Children.IsValidIndex(EditedIndex))
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{
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double Sum = 0;
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for (int32 Index = 0; Index < Children.Num(); Index++)
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{
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if (Index != EditedIndex)
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{
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Sum += Children[Index].Probability;
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}
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}
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if (Sum == 0)
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{
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for (int32 Index = 0; Index < Children.Num(); Index++)
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{
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if (Index != EditedIndex)
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{
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ensure(Children[Index].Probability == 0);
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Children[Index].Probability = (1 - Children[EditedIndex].Probability) / (Children.Num() - 1);
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}
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}
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}
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else
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{
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for (int32 Index = 0; Index < Children.Num(); Index++)
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{
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if (Index != EditedIndex)
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{
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Children[Index].Probability *= (1 - Children[EditedIndex].Probability) / Sum;
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}
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}
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}
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}
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}
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}
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#endif
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