// Called every frame
void ACart::Tick( float DeltaTime )
{
Super::Tick( DeltaTime );
auto World = GetWorld();
for (int32 i = 0; i < 4; i++)
{
FHitResult HitResult(ForceInit);
FCollisionQueryParams Params = FCollisionQueryParams(FName(TEXT("Trace")), true, this);
Params.bTraceComplex = true;
//Params.bTraceAsyncScene = true;
Params.bReturnPhysicalMaterial = true;
const FName TraceTag("MyTraceTag");
World->DebugDrawTraceTag = TraceTag;
Params.TraceTag = TraceTag;
bool Hit = World->LineTraceSingleByChannel(HitResult, Arrows[i]->GetComponentLocation(), Arrows[i]->GetComponentLocation() + Arrows[i]->GetForwardVector() * (SpringLength + WheelRadius), ECC_PhysicsBody, Params);
if (Hit)
{
FVector Force = HitResult.ImpactNormal * SpringStrength * BodyMesh->GetMass() * (1 - HitResult.Distance / (SpringLength + WheelRadius));
BodyMesh->AddForceAtLocation(Force, Arrows[i]->GetComponentLocation());
Wheels[i]->SetWorldLocation(HitResult.Location - (Arrows[i]->GetForwardVector() * WheelRadius));
}
else
{
Wheels[i]->SetWorldLocation(Arrows[i]->GetComponentLocation() + Arrows[i]->GetForwardVector() * SpringLength);
}
}
}
bool UWorld::LineTraceSingleByProfile(struct FHitResult& OutHit, const FVector& Start, const FVector& End, FName ProfileName, const struct FCollisionQueryParams& Params) const
{
ECollisionChannel TraceChannel;
FCollisionResponseParams ResponseParam;
GetCollisionProfileChannelAndResponseParams(ProfileName, TraceChannel, ResponseParam);
return LineTraceSingleByChannel(OutHit, Start, End, TraceChannel, Params, ResponseParam);
}
bool UWorld::SweepSingleByChannel(struct FHitResult& OutHit, const FVector& Start, const FVector& End, const FQuat& Rot, ECollisionChannel TraceChannel, const FCollisionShape& CollisionShape, const FCollisionQueryParams& Params /* = FCollisionQueryParams::DefaultQueryParam */, const FCollisionResponseParams& ResponseParam /* = FCollisionResponseParams::DefaultResponseParam */) const
{
if (CollisionShape.IsNearlyZero())
{
return LineTraceSingleByChannel(OutHit, Start, End, TraceChannel, Params, ResponseParam);
}
else
{
#if UE_WITH_PHYSICS
return GeomSweepSingle(this, CollisionShape, Rot, OutHit, Start, End, TraceChannel, Params, ResponseParam, FCollisionObjectQueryParams::DefaultObjectQueryParam);
#else
OutHit.TraceStart = Start;
OutHit.TraceEnd = End;
return false;
#endif
}
}
void AShooterProjectile::OnRep_Exploded()
{
const auto World = GetWorld();
if (nullptr != World)
{
//!< ヒットした場所を推測する
const auto Forward = GetActorForwardVector();
const auto Location = GetActorLocation();
const auto Start = Location - Forward * 200.0f;
const auto End = Location + Forward * 150.0f;
FHitResult HitResult;
const FCollisionQueryParams Params(TEXT("ExplodeTag"), true, Instigator);
if (false == World->LineTraceSingleByChannel(HitResult, Start, End, ECC_GameTraceChannel_WeaponProjectile, Params))
{
//!< コリジョンが取れない場合でもそれっぽい値にしておく
HitResult.ImpactPoint = Location;
HitResult.ImpactNormal = -Forward;
}
SimulateExplode(HitResult);
}
}
