// AInstancedFoliageActorから最も近いメッシュのトランスフォームを取得するテスト
bool AThirdPersonCppCharacter::FindClosestMeshTransform(FTransform& TM)
{
bool bFound = false;
// float fMinDist = FLT_MAX;
// float fMinDist = WORLD_MAX; // Runtime\Engine\Public\EngineDefines.h
float fMinDist = MAX_flt; // Runtime\Core\Public\Math\NumericLimits.h
float fRadius = 50.0 * 100.0f; // 50m
FVector ActorLocation = GetActorLocation();
DrawDebugSphere(GWorld, ActorLocation, fRadius, 8, FColor::White, false, 5.0f);
bool bWorldSpace = true;
ULevel* Level = GetLevel();
if(!Level) return false;
AInstancedFoliageActor* IFA = AInstancedFoliageActor::GetInstancedFoliageActorForLevel(Level);
for (auto It = IFA->FoliageMeshes.CreateConstIterator(); It; ++It)
{
//UFoliageType* Key = It.Key();
//FFoliageMeshInfo& Value = It.Value();
FFoliageMeshInfo const* MeshInfo = &*It.Value();
if (!MeshInfo) {
continue;
}
if(!MeshInfo->Component) {
continue;
}
UHierarchicalInstancedStaticMeshComponent* HISMComponent = MeshInfo->Component;
TArray<int32> IdxArray = HISMComponent->GetInstancesOverlappingSphere(ActorLocation, fRadius, bWorldSpace);
for(int32 i = 0; i < IdxArray.Num(); i++)
{
FTransform OutInstanceTransform;
if(HISMComponent->GetInstanceTransform(IdxArray[i], OutInstanceTransform, bWorldSpace))
{
const FVector& MeshLocation = OutInstanceTransform.GetLocation();
if(!IsForward(MeshLocation, 0.707f))
{
continue;
}
float Dist = FVector::Dist(OutInstanceTransform.GetLocation(), ActorLocation);
if(Dist < fMinDist)
{
fMinDist = Dist;
TM = OutInstanceTransform;
bFound = true;
}
}
}
}
return bFound;
}
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