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

最も近いメッシュのトランスフォームを取得

// 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; }

球内のフォリッジメッシュを判定

球内のフォリッジメッシュを判定

void AThirdPersonCppCharacter::TestFoliageMeshInSideSphere() { ULevel* Level = GetLevel(); // フォリッジアクターを取得 AInstancedFoliageActor* IFA = AInstancedFoliageActor::GetInstancedFoliageActorForLevel(Level); FVector vPos = GetActorLocation(); float fRadius = 10000.0f; // 100m FSphere SearchSphere(vPos, fRadius); // 球を描画 DrawDebugSphere(GWorld, vPos, fRadius, 8, FColor::White, false, 5.0f); // TMap<UFoliageType*, TUniqueObj<FFoliageMeshInfo>> FoliageMeshes; for (auto It = IFA->FoliageMeshes.CreateConstIterator(); It; ++It) { UFoliageType* Key = It.Key(); //FFoliageMeshInfo& Value = It.Value(); FFoliageMeshInfo const* MeshInfo = &*It.Value(); if (MeshInfo && MeshInfo->Component) { UHierarchicalInstancedStaticMeshComponent* HISMComponent = MeshInfo->Component; for(int32 i = 0; i < HISMComponent->PerInstanceSMData.Num(); i++) { FVector MeshPos = HISMComponent->PerInstanceSMData[i].Transform.GetOrigin(); bool bInside = SearchSphere.IsInside(MeshPos); FColor color = FColor::Red; if(bInside) { color = FColor::Green; } DrawDebugLine(GWorld, MeshPos, MeshPos + FVector(0, 0, 10000.0f), color, false, 5.0f); } } } }

ターゲットが前か右か判定

ターゲットが前か右か判定

bool AThirdPersonCppCharacter::IsForward(const FVector& vTarget) { bool bForward = false; FVector vDir = vTarget - GetActorLocation(); vDir.Normalize(); FVector vFwd = GetActorForwardVector(); float fDot = FVector::DotProduct(vFwd, vDir); if ( fDot >= 0.f ) { bForward = true; } return bForward; } bool AThirdPersonCppCharacter::IsRight(const FVector& vTarget) { bool bRight = false; FVector vDir = vTarget - GetActorLocation(); vDir.Normalize(); FVector vRight = GetActorRightVector(); float fDot = FVector::DotProduct(vRight, vDir); if ( fDot >= 0.f ) { bRight = true; } return bRight; }

アクタをターゲット方向に回転

アクタをターゲット方向に回転させるテスト

// fAlpha は FMath::InterpEaseInOut(0.0f, 1.0f, fAlpha, fExp); などで補間 void AThirdPersonCppCharacter::Rot2Target(const FVector& vTarget, float fAlpha) { // Zをゼロにする FVector vPos = GetActorLocation(); FVector vFwd = GetActorForwardVector(); vFwd.Z = 0.0f; vFwd.Normalize(); FQuat qFwd(vFwd.Rotation()); FVector vDir = vTarget - vPos; vDir.Z = 0.0f; vDir.Normalize(); FQuat qTarget(vDir.Rotation()); FQuat qResult = FQuat::Slerp(qFwd, qTarget, fAlpha); SetActorRotation(qResult); }