PhantomPhysics: Fix gravity

Fix gravity not being adjusted when colliding with a phantom physics object

Tested that while on moonbase, the players gravity is no longer reset to 1 when they change their cheat info.

dGame/dComponents/PhantomPhysicsComponent.cpp

@@ -215,7 +215,7 @@ PhantomPhysicsComponent::PhantomPhysicsComponent(Entity* parent) : PhysicsCompon
 			m_dpEntity->SetRotation(m_Rotation);
 			m_dpEntity->SetPosition(m_Position);
 			dpWorld::Instance().AddEntity(m_dpEntity);
-		} else if (info->physicsAsset == "env\\env_won_fv_gas-blocking-volume.hkx"){
+		} else if (info->physicsAsset == "env\\env_won_fv_gas-blocking-volume.hkx") {
 			m_dpEntity = new dpEntity(m_Parent->GetObjectID(), 390.496826f, 111.467964f, 600.821534f, true);
 			m_dpEntity->SetScale(m_Scale);
 			m_dpEntity->SetRotation(m_Rotation);
@@ -336,11 +336,37 @@ void PhantomPhysicsComponent::Serialize(RakNet::BitStream* outBitStream, bool bI
 	}
 }
 
+// Even if we were to implement Friction server side,
+// it also defaults to 1.0f in the last argument, so we dont need two functions to do the same thing.
+void ApplyCollisionEffect(const LWOOBJID& target, const ePhysicsEffectType effectType, const float effectScale) {
+	switch (effectType) {
+	case ePhysicsEffectType::GRAVITY_SCALE: {
+		auto* targetEntity = Game::entityManager->GetEntity(target);
+		if (targetEntity) {
+			auto* controllablePhysicsComponent = targetEntity->GetComponent<ControllablePhysicsComponent>();
+			// dont want to apply an effect to nothing.
+			if (!controllablePhysicsComponent) return;
+			controllablePhysicsComponent->SetGravityScale(effectScale);
+			GameMessages::SendSetGravityScale(target, effectScale, targetEntity->GetSystemAddress());
+		}
+	}
+	// The other types are not handled by the server
+	case ePhysicsEffectType::ATTRACT:
+	case ePhysicsEffectType::FRICTION:
+	case ePhysicsEffectType::PUSH:
+	case ePhysicsEffectType::REPULSE:
+	default:
+		break;
+	}
+}
+
 void PhantomPhysicsComponent::Update(float deltaTime) {
 	if (!m_dpEntity) return;
 
 	//Process enter events
 	for (auto en : m_dpEntity->GetNewObjects()) {
+		if (!en) continue;
+		ApplyCollisionEffect(en->GetObjectID(), m_EffectType, m_DirectionalMultiplier);
 		m_Parent->OnCollisionPhantom(en->GetObjectID());
 
 		//If we are a respawn volume, inform the client:
@@ -357,6 +383,8 @@ void PhantomPhysicsComponent::Update(float deltaTime) {
 
 	//Process exit events
 	for (auto en : m_dpEntity->GetRemovedObjects()) {
+		if (!en) continue;
+		ApplyCollisionEffect(en->GetObjectID(), m_EffectType, 1.0f);
 		m_Parent->OnCollisionLeavePhantom(en->GetObjectID());
 	}
 }

dGame/dGameMessages/GameMessages.cpp

@@ -5473,6 +5473,18 @@ void GameMessages::HandleRemoveItemFromInventory(RakNet::BitStream* inStream, En
 	}
 }
 
+void GameMessages::SendSetGravityScale(const LWOOBJID& target, const float effectScale, const SystemAddress& sysAddr) {
+	CBITSTREAM;
+	CMSGHEADER;
+
+	bitStream.Write(target);
+	bitStream.Write(eGameMessageType::SET_GRAVITY_SCALE);
+
+	bitStream.Write(effectScale);
+
+	SEND_PACKET;
+}
+
 void GameMessages::HandleMoveItemInInventory(RakNet::BitStream* inStream, Entity* entity) {
 	bool destInvTypeIsDefault = false;
 	int32_t destInvType = eInventoryType::INVALID;
@@ -6269,7 +6281,7 @@ void GameMessages::HandleConfirmDonationOnPlayer(RakNet::BitStream* inStream, En
 	auto* donationEntity = Game::entityManager->GetEntity(characterComponent->GetCurrentInteracting());
 	if (!donationEntity) return;
 	auto* donationVendorComponent = donationEntity->GetComponent<DonationVendorComponent>();
-	if(!donationVendorComponent) return;
+	if (!donationVendorComponent) return;
 	if (donationVendorComponent->GetActivityID() == 0) {
 		Game::logger->Log("GameMessages", "WARNING: Trying to dontate to a vendor with no activity");
 		return;
@@ -6279,7 +6291,7 @@ void GameMessages::HandleConfirmDonationOnPlayer(RakNet::BitStream* inStream, En
 	auto items = inventory->GetItems();
 	if (!items.empty()) {
 		uint32_t count = 0;
-		for (auto& [itemID, item] : items){
+		for (auto& [itemID, item] : items) {
 			count += item->GetCount();
 			item->RemoveFromInventory();
 		}
@@ -6297,7 +6309,7 @@ void GameMessages::HandleCancelDonationOnPlayer(RakNet::BitStream* inStream, Ent
 	auto* inventory = inventoryComponent->GetInventory(eInventoryType::DONATION);
 	if (!inventory) return;
 	auto items = inventory->GetItems();
-	for (auto& [itemID, item] : items){
+	for (auto& [itemID, item] : items) {
 		inventoryComponent->MoveItemToInventory(item, eInventoryType::BRICKS, item->GetCount(), false, false, true);
 	}
 	auto* characterComponent = entity->GetComponent<CharacterComponent>();

dGame/dGameMessages/GameMessages.h

@@ -109,6 +109,8 @@ namespace GameMessages {
 
 	void SendSetInventorySize(Entity* entity, int invType, int size);
 
+	void SendSetGravityScale(const LWOOBJID& target, const float effectScale, const SystemAddress& sysAddr);
+
 	void SendSetEmoteLockState(Entity* entity, bool bLock, int emoteID);
 	void SendSetJetPackMode(Entity* entity, bool use, bool bypassChecks = false, bool doHover = false, int effectID = -1, float airspeed = 10, float maxAirspeed = 15, float verticalVelocity = 1, int warningEffectID = -1);
 	void SendResurrect(Entity* entity);