AFlareSpacecraft* UFlareSpacecraftNavigationSystem::GetDockStation()
{
if (IsDocked())
{
for (int32 SpacecraftIndex = 0; SpacecraftIndex < Spacecraft->GetGame()->GetActiveSector()->GetSpacecrafts().Num(); SpacecraftIndex++)
{
AFlareSpacecraft* Station = Spacecraft->GetGame()->GetActiveSector()->GetSpacecrafts()[SpacecraftIndex];
if (Station && Station->GetParent()->GetImmatriculation() == Data->DockedTo)
{
return Station;
}
}
}
return NULL;
}
bool UFlareSpacecraftNavigationSystem::Undock()
{
// Try undocking
if (IsDocked())
{
FLOGV("UFlareSpacecraftNavigationSystem::Undock : '%s' undocking from '%s'",
*Spacecraft->GetParent()->GetImmatriculation().ToString(),
*Data->DockedTo.ToString());
// Detach from station
if(DockConstraint)
{
DockConstraint->BreakConstraint();
DockConstraint->DestroyComponent();
DockConstraint = NULL;
}
AFlareSpacecraft* DockStation = GetDockStation();
DockStation->GetDockingSystem()->ReleaseDock(Spacecraft, Data->DockedAt);
// Update data
SetStatus(EFlareShipStatus::SS_AutoPilot);
Data->DockedTo = NAME_None;
Data->DockedAt = -1;
// Update Angular acceleration rate : when it's docked the mass is the ship mass + the station mass
Spacecraft->SetRCSDescription(Spacecraft->GetRCSDescription());
Spacecraft->OnUndocked(DockStation);
// Leave
PushCommandLocation(Spacecraft->GetRootComponent()->GetComponentTransform().TransformPositionNoScale(5000 * FVector(-1, 0, 0)));
FLOG("UFlareSpacecraftNavigationSystem::Undock : successful");
// Hack for bug #195: for ue4 to reweld all.
Spacecraft->Airframe->SetSimulatePhysics(false);
Spacecraft->Airframe->SetSimulatePhysics(true);
return true;
}
// Failed
else
{
FLOGV("UFlareSpacecraftNavigationSystem::Undock : '%s' is not docked", *Spacecraft->GetParent()->GetImmatriculation().ToString());
return false;
}
}
void UFlareSpacecraftNavigationSystem::AbortAllCommands()
{
FFlareShipCommandData Command;
while (CommandData.Dequeue(Command))
{
FLOGV("UFlareSpacecraftNavigationSystem::AbortAllCommands : '%s' has aborted command '%s'",
*Spacecraft->GetParent()->GetImmatriculation().ToString(),
*EFlareCommandDataType::ToString(Command.Type));
if (Command.Type == EFlareCommandDataType::CDT_Dock)
{
// Release dock grant
AFlareSpacecraft* Station = Command.ActionTarget;
Station->GetDockingSystem()->ReleaseDock(Spacecraft, Command.ActionTargetParam);
}
}
SetStatus(EFlareShipStatus::SS_Manual);
}
AFlareSpacecraft* UFlareSpacecraftNavigationSystem::GetNearestShip(AFlareSpacecraft* DockingStation) const
{
// For now an host ship is a the nearest host ship with the following critera:
// - Alive or not
// - From any company
// - Is the nearest
// - Is not me
FVector PilotLocation = Spacecraft->GetActorLocation();
float MinDistanceSquared = -1;
AFlareSpacecraft* NearestShip = NULL;
for (int32 SpacecraftIndex = 0; SpacecraftIndex < Spacecraft->GetGame()->GetActiveSector()->GetSpacecrafts().Num(); SpacecraftIndex++)
{
AFlareSpacecraft* ShipCandidate = Spacecraft->GetGame()->GetActiveSector()->GetSpacecrafts()[SpacecraftIndex];
if (ShipCandidate != Spacecraft && ShipCandidate != DockingStation)
{
if (DockingStation && (DockingStation->GetDockingSystem()->IsGrantedShip(ShipCandidate) || DockingStation->GetDockingSystem()->IsDockedShip(ShipCandidate)))
{
// Ignore ship docked or docking at the same station
continue;
}
float DistanceSquared = (PilotLocation - ShipCandidate->GetActorLocation()).SizeSquared();
if (NearestShip == NULL || DistanceSquared < MinDistanceSquared)
{
MinDistanceSquared = DistanceSquared;
NearestShip = ShipCandidate;
}
}
}
return NearestShip;
}
void UFlareAsteroidComponent::TickComponent(float DeltaTime, enum ELevelTick TickType, FActorComponentTickFunction *ThisTickFunction)
{
Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
float CollisionSize = GetCollisionShape().GetExtent().Size();
EffectsUpdateTimer += DeltaTime;
// Get player ship
AFlareGame* Game = Cast<AFlareGame>(GetWorld()->GetAuthGameMode());
FCHECK(Game);
AFlarePlayerController* PC = Game->GetPC();
FCHECK(PC);
AFlareSpacecraft* ShipPawn = PC->GetShipPawn();
// Update if close to player and visible
if (ShipPawn
&& (ShipPawn->GetActorLocation() - GetComponentLocation()).Size() < 500000
&& (GetWorld()->TimeSeconds - LastRenderTime) < 0.5)
{
if (EffectsUpdateTimer > EffectsUpdatePeriod)
{
// World data
FVector AsteroidLocation = GetComponentLocation();
FVector SunDirection = Game->GetPlanetarium()->GetSunDirection();
SunDirection.Normalize();
// Compute new FX locations
for (int32 Index = 0; Index < Effects.Num(); Index++)
{
FVector RandomDirection = FVector::CrossProduct(SunDirection, EffectsKernels[Index]);
RandomDirection.Normalize();
FVector StartPoint = AsteroidLocation + RandomDirection * CollisionSize;
// Trace params
FHitResult HitResult(ForceInit);
FCollisionQueryParams TraceParams(FName(TEXT("Asteroid Trace")), false, NULL);
TraceParams.bTraceComplex = true;
TraceParams.bReturnPhysicalMaterial = false;
ECollisionChannel CollisionChannel = ECollisionChannel::ECC_WorldDynamic;
// Trace
bool FoundHit = GetWorld()->LineTraceSingleByChannel(HitResult, StartPoint, AsteroidLocation, CollisionChannel, TraceParams);
if (FoundHit && HitResult.Component == this && Effects[Index])
{
FVector EffectLocation = HitResult.Location;
if (!Effects[Index]->IsActive())
{
Effects[Index]->Activate();
}
Effects[Index]->SetWorldLocation(EffectLocation);
Effects[Index]->SetWorldRotation(SunDirection.Rotation());
}
else
{
Effects[Index]->Deactivate();
}
}
EffectsUpdateTimer = 0;
}
}
// Disable all
else
{
for (int32 Index = 0; Index < Effects.Num(); Index++)
{
Effects[Index]->Deactivate();
}
}
}
AFlareSpacecraft* UFlareSector::LoadSpacecraft(UFlareSimulatedSpacecraft* ParentSpacecraft)
{
AFlareSpacecraft* Spacecraft = NULL;
FLOGV("UFlareSector::LoadSpacecraft : Start loading ('%s')", *ParentSpacecraft->GetImmatriculation().ToString());
// Spawn parameters
FActorSpawnParameters Params;
Params.bNoFail = true;
Params.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AdjustIfPossibleButAlwaysSpawn;
// Create and configure the ship
Spacecraft = GetGame()->GetWorld()->SpawnActor<AFlareSpacecraft>(ParentSpacecraft->GetDescription()->Template->GeneratedClass, ParentSpacecraft->GetData().Location, ParentSpacecraft->GetData().Rotation, Params);
if (Spacecraft && !Spacecraft->IsPendingKillPending())
{
Spacecraft->Load(ParentSpacecraft);
UPrimitiveComponent* RootComponent = Cast<UPrimitiveComponent>(Spacecraft->GetRootComponent());
if (Spacecraft->IsStation())
{
SectorStations.Add(Spacecraft);
}
else
{
SectorShips.Add(Spacecraft);
}
SectorSpacecrafts.Add(Spacecraft);
FLOGV("%s spawn mode = %d", *Spacecraft->GetImmatriculation().ToString(), ParentSpacecraft->GetData().SpawnMode+0)
switch (ParentSpacecraft->GetData().SpawnMode)
{
// Already known to be correct
case EFlareSpawnMode::Safe:
FLOGV("UFlareSector::LoadSpacecraft : Safe spawn '%s' at (%f,%f,%f)",
*ParentSpacecraft->GetImmatriculation().ToString(),
ParentSpacecraft->GetData().Location.X, ParentSpacecraft->GetData().Location.Y, ParentSpacecraft->GetData().Location.Z);
RootComponent->SetPhysicsLinearVelocity(ParentSpacecraft->GetData().LinearVelocity, false);
RootComponent->SetPhysicsAngularVelocity(ParentSpacecraft->GetData().AngularVelocity, false);
break;
// First spawn
case EFlareSpawnMode::Spawn:
PlaceSpacecraft(Spacecraft, ParentSpacecraft->GetData().Location);
{
FVector NewLocation = Spacecraft->GetActorLocation();
FLOGV("UFlareSector::LoadSpacecraft : Placing '%s' at (%f,%f,%f)",
*ParentSpacecraft->GetImmatriculation().ToString(),
NewLocation.X, NewLocation.Y, NewLocation.Z);
}
RootComponent->SetPhysicsLinearVelocity(FVector::ZeroVector, false);
RootComponent->SetPhysicsAngularVelocity(FVector::ZeroVector, false);
break;
// Incoming in sector
case EFlareSpawnMode::Travel:
{
FLOGV("UFlareSector::LoadSpacecraft : Travel '%s' at (%f, %f, %f)",
*ParentSpacecraft->GetImmatriculation().ToString(),
ParentSpacecraft->GetData().Location.X, ParentSpacecraft->GetData().Location.Y, ParentSpacecraft->GetData().Location.Z);
FVector SpawnDirection;
TArray<AFlareSpacecraft*> FriendlySpacecrafts = GetCompanySpacecrafts(Spacecraft->GetCompany());
FVector FriendlyShipLocationSum = FVector::ZeroVector;
int FriendlyShipCount = 0;
for (int SpacecraftIndex = 0 ; SpacecraftIndex < FriendlySpacecrafts.Num(); SpacecraftIndex++)
{
AFlareSpacecraft *SpacecraftCandidate = FriendlySpacecrafts[SpacecraftIndex];
if (!SpacecraftCandidate->IsStation() && SpacecraftCandidate != Spacecraft)
{
FriendlyShipLocationSum += SpacecraftCandidate->GetActorLocation();
FriendlyShipCount++;
}
}
if (FriendlyShipCount == 0)
{
FVector NotFriendlyShipLocationSum = FVector::ZeroVector;
int NotFriendlyShipCount = 0;
for (int SpacecraftIndex = 0 ; SpacecraftIndex < SectorShips.Num(); SpacecraftIndex++)
{
AFlareSpacecraft *SpacecraftCandidate = SectorShips[SpacecraftIndex];
if (SpacecraftCandidate != Spacecraft && SpacecraftCandidate->GetCompany() != Spacecraft->GetCompany())
{
NotFriendlyShipLocationSum += SpacecraftCandidate->GetActorLocation();
NotFriendlyShipCount++;
}
}
if (NotFriendlyShipCount == 0)
{
SpawnDirection = FMath::VRand();
}
else
{
FVector NotFriendlyShipLocationMean = NotFriendlyShipLocationSum / NotFriendlyShipCount;
SpawnDirection = (GetSectorCenter() - NotFriendlyShipLocationMean).GetUnsafeNormal();
}
}
else
{
FVector FriendlyShipLocationMean = FriendlyShipLocationSum / FriendlyShipCount;
SpawnDirection = (FriendlyShipLocationMean - GetSectorCenter()).GetUnsafeNormal() ;
}
float SpawnDistance = GetSectorRadius() + 1;
if (GetSimulatedSector()->GetSectorBattleState(Spacecraft->GetCompany()) != EFlareSectorBattleState::NoBattle)
{
SpawnDistance += 500000; // 5 km
}
SpawnDistance = FMath::Min(SpawnDistance, GetSectorLimits());
FVector Location = GetSectorCenter() + SpawnDirection * SpawnDistance;
FVector CenterDirection = (GetSectorCenter() - Location).GetUnsafeNormal();
Spacecraft->SetActorRotation(CenterDirection.Rotation());
PlaceSpacecraft(Spacecraft, Location);
float SpawnVelocity = 0;
if (GetSimulatedSector()->GetSectorBattleState(Spacecraft->GetCompany()) != EFlareSectorBattleState::NoBattle)
{
SpawnVelocity = 10000;
}
RootComponent->SetPhysicsLinearVelocity(CenterDirection * SpawnVelocity, false);
RootComponent->SetPhysicsAngularVelocity(FVector::ZeroVector, false);
}
break;
case EFlareSpawnMode::Exit:
{
float SpawnDistance = GetSectorLimits() * 0.9;
float SpawnVelocity = ParentSpacecraft->GetData().LinearVelocity.Size() * 0.6;
FVector SpawnDirection = ParentSpacecraft->GetData().Location.GetUnsafeNormal();
FVector Location = SpawnDirection * SpawnDistance;
FVector CenterDirection = (GetSectorCenter() - Location).GetUnsafeNormal();
FLOGV("UFlareSector::LoadSpacecraft : Exit '%s' at (%f, %f, %f)",
*ParentSpacecraft->GetImmatriculation().ToString(),
Location.X, Location.Y, Location.Z);
PlaceSpacecraft(Spacecraft, Location);
Spacecraft->SetActorRotation(CenterDirection.Rotation());
RootComponent->SetPhysicsLinearVelocity(CenterDirection * SpawnVelocity, false);
RootComponent->SetPhysicsAngularVelocity(FVector::ZeroVector, false);
}
break;
}
ParentSpacecraft->SetSpawnMode(EFlareSpawnMode::Safe);
}
void UFlareSpacecraftDamageSystem::OnCollision(class AActor* Other, FVector HitLocation, FVector NormalImpulse)
{
// If receive hit from over actor, like a ship we must apply collision damages.
// The applied damage energy is 0.2% of the kinetic energy of the other actor. The kinetic
// energy is calculated from the relative speed between the 2 actors, and only with the relative
// speed projected in the axis of the collision normal: if 2 very fast ship only slightly touch,
// only few energy will be decipated by the impact.
//
// The damages are applied only to the current actor, the ReceiveHit method of the other actor
// will also call an it will apply its collision damages itself.
// If the other actor is a projectile, specific weapon damage code is done in the projectile hit
// handler: in this case we ignore the collision
AFlareShell* OtherProjectile = Cast<AFlareShell>(Other);
if (OtherProjectile)
{
return;
}
// No primitive component, ignore
UPrimitiveComponent* OtherRoot = Cast<UPrimitiveComponent>(Other->GetRootComponent());
if (!OtherRoot)
{
return;
}
// Ignore debris
AStaticMeshActor* OtherActor = Cast<AStaticMeshActor>(Other);
if (OtherActor)
{
if (OtherActor->GetName().StartsWith("Debris"))
{
return;
}
}
// Relative velocity
FVector DeltaVelocity = ((OtherRoot->GetPhysicsLinearVelocity() - Spacecraft->Airframe->GetPhysicsLinearVelocity()) / 100);
// Compute the relative velocity in the impact axis then compute kinetic energy
/*float ImpactSpeed = DeltaVelocity.Size();
float ImpactMass = FMath::Min(Spacecraft->GetSpacecraftMass(), OtherRoot->GetMass());
*/
//200 m /s -> 6301.873047 * 20000 -> 300 / 2 damage
float ImpactSpeed = 0;
float ImpactEnergy = 0;
float ImpactMass = Spacecraft->GetSpacecraftMass();
// Check if the mass was set and is valid
if (ImpactMass > KINDA_SMALL_NUMBER)
{
ImpactSpeed = NormalImpulse.Size() / (ImpactMass * 100.f);
ImpactEnergy = ImpactMass * ImpactSpeed / 8402.f;
}
float Radius = 0.2 + FMath::Sqrt(ImpactEnergy) * 0.11;
//FLOGV("OnCollision %s", *Spacecraft->GetImmatriculation().ToString());
//FLOGV(" OtherRoot->GetPhysicsLinearVelocity()=%s", *OtherRoot->GetPhysicsLinearVelocity().ToString());
//FLOGV(" OtherRoot->GetPhysicsLinearVelocity().Size()=%f", OtherRoot->GetPhysicsLinearVelocity().Size());
//FLOGV(" Spacecraft->Airframe->GetPhysicsLinearVelocity()=%s", *Spacecraft->Airframe->GetPhysicsLinearVelocity().ToString());
//FLOGV(" Spacecraft->Airframe->GetPhysicsLinearVelocity().Size()=%f", Spacecraft->Airframe->GetPhysicsLinearVelocity().Size());
//FLOGV(" dot=%f", FVector::DotProduct(DeltaVelocity.GetUnsafeNormal(), HitNormal.GetUnsafeNormal()));
/*FLOGV(" DeltaVelocity=%s", *DeltaVelocity.ToString());
FLOGV(" ImpactSpeed=%f", ImpactSpeed);
FLOGV(" ImpactMass=%f", ImpactMass);
FLOGV(" ImpactEnergy=%f", ImpactEnergy);
FLOGV(" Radius=%f", Radius);*/
bool HasHit = false;
FHitResult BestHitResult;
float BestHitDistance = 0;
for (int32 ComponentIndex = 0; ComponentIndex < Components.Num(); ComponentIndex++)
{
UFlareSpacecraftComponent* Component = Cast<UFlareSpacecraftComponent>(Components[ComponentIndex]);
if (Component)
{
FHitResult HitResult(ForceInit);
FCollisionQueryParams TraceParams(FName(TEXT("Fragment Trace")), true);
TraceParams.bTraceComplex = true;
TraceParams.bReturnPhysicalMaterial = false;
Component->LineTraceComponent(HitResult, HitLocation, HitLocation + Spacecraft->GetLinearVelocity().GetUnsafeNormal() * 10000, TraceParams);
if (HitResult.Actor.IsValid()){
float HitDistance = (HitResult.Location - HitLocation).Size();
if (!HasHit || HitDistance < BestHitDistance)
{
BestHitDistance = HitDistance;
BestHitResult = HitResult;
}
//FLOGV("Collide hit %s at a distance=%f", *Component->GetReadableName(), HitDistance);
HasHit = true;
}
}
}
if (HasHit)
{
//DrawDebugLine(Spacecraft->GetWorld(), HitLocation, BestHitResult.Location, FColor::Magenta, true);
}
else
{
int32 BestComponentIndex = -1;
BestHitDistance = 0;
for (int32 ComponentIndex = 0; ComponentIndex < Components.Num(); ComponentIndex++)
{
UFlareSpacecraftComponent* Component = Cast<UFlareSpacecraftComponent>(Components[ComponentIndex]);
if (Component)
{
float ComponentDistance = (Component->GetComponentLocation() - HitLocation).Size();
if (BestComponentIndex == -1 || BestHitDistance > ComponentDistance)
{
BestComponentIndex = ComponentIndex;
BestHitDistance = ComponentDistance;
}
}
}
UFlareSpacecraftComponent* Component = Cast<UFlareSpacecraftComponent>(Components[BestComponentIndex]);
FCollisionQueryParams TraceParams(FName(TEXT("Fragment Trace")), true);
TraceParams.bTraceComplex = true;
TraceParams.bReturnPhysicalMaterial = false;
Component->LineTraceComponent(BestHitResult, HitLocation, Component->GetComponentLocation(), TraceParams);
//DrawDebugLine(Spacecraft->GetWorld(), HitLocation, BestHitResult.Location, FColor::Yellow, true);
}
AFlareSpacecraft* OtherSpacecraft = Cast<AFlareSpacecraft>(Other);
UFlareCompany* DamageSource = NULL;
if (OtherSpacecraft)
{
DamageSource = OtherSpacecraft->GetParent()->GetCompany();
LastDamageCauser = OtherSpacecraft;
}
else
{
LastDamageCauser = NULL;
}
ApplyDamage(ImpactEnergy, Radius, BestHitResult.Location, EFlareDamage::DAM_Collision, DamageSource);
}
void UFlareSpacecraftNavigationSystem::CheckCollisionDocking(AFlareSpacecraft* DockingCandidate)
{
if (IsAutoPilot())
{
FFlareShipCommandData CurrentCommand;
if (CommandData.Peek(CurrentCommand))
{
if (CurrentCommand.Type == EFlareCommandDataType::CDT_Dock)
{
// We are in a automatic docking process
AFlareSpacecraft* DockStation = CurrentCommand.ActionTarget;
if (DockStation != DockingCandidate)
{
// The hit spacecraft is not the docking target station
return;
}
// Check dock alignement
// TODO Put to external constants
float DockingAngleLimit = 2; // 1° of angle error to dock
float DockingVelocityLimit = 200; // 1 m/s
float DockingLateralVelocityLimit = 20; // 10 cm/s
float DockingAngularVelocityLimit = 10; // 5 °/s
int32 DockId = CurrentCommand.ActionTargetParam;
FVector ShipAngularVelocity = Spacecraft->Airframe->GetPhysicsAngularVelocity();
FVector ShipDockLocation = GetDockLocation();
FFlareDockingInfo StationDockInfo = DockStation->GetDockingSystem()->GetDockInfo(DockId);
FVector StationCOM = DockStation->Airframe->GetBodyInstance()->GetCOMPosition();
FVector StationAngularVelocity = DockStation->Airframe->GetPhysicsAngularVelocity();
FVector StationDockLocation = DockStation->Airframe->GetComponentTransform().TransformPosition(StationDockInfo.LocalLocation);
FVector StationDockSelfRotationInductedLinearVelocity = (PI / 180.f) * FVector::CrossProduct(StationAngularVelocity, StationDockLocation- StationCOM);
FVector ShipDockSelfRotationInductedLinearVelocity = (PI / 180.f) * FVector::CrossProduct(ShipAngularVelocity, ShipDockLocation-COM);
FVector StationDockLinearVelocity = StationDockSelfRotationInductedLinearVelocity + DockStation->GetLinearVelocity() * 100;
FVector ShipDockLinearVelocity = ShipDockSelfRotationInductedLinearVelocity + Spacecraft->GetLinearVelocity() * 100;
FVector ShipDockAxis = Spacecraft->Airframe->GetComponentToWorld().GetRotation().RotateVector(FVector(1, 0, 0)); // Ship docking port are always at front
FVector StationDockAxis = DockStation->Airframe->GetComponentToWorld().GetRotation().RotateVector(StationDockInfo.LocalAxis);
float DockToDockAngle = FMath::RadiansToDegrees(FMath::Acos(FVector::DotProduct(-ShipDockAxis, StationDockAxis)));
FVector RelativeDockToDockLinearVelocity = StationDockLinearVelocity - ShipDockLinearVelocity;
// Angular velocity must be the same
FVector RelativeDockAngularVelocity = ShipAngularVelocity - StationAngularVelocity;
// Check if dockable
bool OkForDocking = true;
if (DockToDockAngle > DockingAngleLimit)
{
//FLOG("OkForDocking ? Not aligned");
// Not aligned
OkForDocking = false;
}
else if (RelativeDockToDockLinearVelocity.Size() > DockingVelocityLimit)
{
//FLOG("OkForDocking ? Too fast");
// Too fast
OkForDocking = false;
}
else if (FVector::VectorPlaneProject(RelativeDockToDockLinearVelocity, StationDockAxis).Size() > DockingLateralVelocityLimit)
{
//FLOG("OkForDocking ? Too much lateral velocity");
// Too much lateral velocity
OkForDocking = false;
}
else if (RelativeDockAngularVelocity.Size() > DockingAngularVelocityLimit)
{
//FLOG("OkForDocking ? Too much angular velocity");
// Too much angular velocity
OkForDocking = false;
}
if (OkForDocking)
{
// All is ok for docking, perform dock
//FLOG(" Ok for docking after hit");
ConfirmDock(DockStation, DockId);
return;
}
}
}
}
}
