Load blocks and objects behind player when in third-persion front-view (#13431)

src/client/client.cpp

@@ -1014,8 +1014,8 @@ void Client::Send(NetworkPacket* pkt)
 		serverCommandFactoryTable[pkt->getCommand()].reliable);
 }
 
-// Will fill up 12 + 12 + 4 + 4 + 4 bytes
+// Will fill up 12 + 12 + 4 + 4 + 4 + 1 + 1 + 1 bytes
-void writePlayerPos(LocalPlayer *myplayer, ClientMap *clientMap, NetworkPacket *pkt)
+void writePlayerPos(LocalPlayer *myplayer, ClientMap *clientMap, NetworkPacket *pkt, bool camera_inverted)
 {
 	v3f pf           = myplayer->getPosition() * 100;
 	v3f sf           = myplayer->getSpeed() * 100;
@@ -1039,9 +1039,11 @@ void writePlayerPos(LocalPlayer *myplayer, ClientMap *clientMap, NetworkPacket *
 		[12+12+4+4] u32 keyPressed
 		[12+12+4+4+4] u8 fov*80
 		[12+12+4+4+4+1] u8 ceil(wanted_range / MAP_BLOCKSIZE)
+		[12+12+4+4+4+1+1] u8 camera_inverted (bool)
 	*/
 	*pkt << position << speed << pitch << yaw << keyPressed;
 	*pkt << fov << wanted_range;
+	*pkt << camera_inverted;
 }
 
 void Client::interact(InteractAction action, const PointedThing& pointed)
@@ -1076,7 +1078,7 @@ void Client::interact(InteractAction action, const PointedThing& pointed)
 
 	pkt.putLongString(tmp_os.str());
 
-	writePlayerPos(myplayer, &m_env.getClientMap(), &pkt);
+	writePlayerPos(myplayer, &m_env.getClientMap(), &pkt, m_camera->getCameraMode() == CAMERA_MODE_THIRD_FRONT);
 
 	Send(&pkt);
 }
@@ -1378,6 +1380,7 @@ void Client::sendPlayerPos()
 	u8 wanted_range = map.getControl().wanted_range;
 
 	u32 keyPressed = player->control.getKeysPressed();
+	bool camera_inverted = m_camera->getCameraMode() == CAMERA_MODE_THIRD_FRONT;
 
 	if (
 			player->last_position        == player->getPosition() &&
@@ -1386,6 +1389,7 @@ void Client::sendPlayerPos()
 			player->last_yaw             == player->getYaw()      &&
 			player->last_keyPressed      == keyPressed            &&
 			player->last_camera_fov      == camera_fov            &&
+			player->last_camera_inverted == camera_inverted       &&
 			player->last_wanted_range    == wanted_range)
 		return;
 
@@ -1395,11 +1399,12 @@ void Client::sendPlayerPos()
 	player->last_yaw             = player->getYaw();
 	player->last_keyPressed      = keyPressed;
 	player->last_camera_fov      = camera_fov;
+	player->last_camera_inverted = camera_inverted;
 	player->last_wanted_range    = wanted_range;
 
-	NetworkPacket pkt(TOSERVER_PLAYERPOS, 12 + 12 + 4 + 4 + 4 + 1 + 1);
+	NetworkPacket pkt(TOSERVER_PLAYERPOS, 12 + 12 + 4 + 4 + 4 + 1 + 1 + 1);
 
-	writePlayerPos(player, &map, &pkt);
+	writePlayerPos(player, &map, &pkt, camera_inverted);
 
 	Send(&pkt);
 }

src/client/localplayer.h

@@ -84,6 +84,7 @@ public:
 	u32 last_keyPressed = 0;
 	u8 last_camera_fov = 0;
 	u8 last_wanted_range = 0;
+	bool last_camera_inverted = false;
 
 	float camera_impact = 0.0f;
 

src/clientiface.cpp

@@ -149,6 +149,9 @@ void RemoteClient::GetNextBlocks (
 	camera_dir.rotateYZBy(sao->getLookPitch());
 	camera_dir.rotateXZBy(sao->getRotation().Y);
 
+	if (sao->getCameraInverted())
+		camera_dir = -camera_dir;
+
 	u16 max_simul_sends_usually = m_max_simul_sends;
 
 	/*

src/network/networkprotocol.h

@@ -920,8 +920,10 @@ enum ToServerCommand
 		[2+12+12] s32 pitch*100
 		[2+12+12+4] s32 yaw*100
 		[2+12+12+4+4] u32 keyPressed
-		[2+12+12+4+4+1] u8 fov*80
+		[2+12+12+4+4+4] u8 fov*80
 		[2+12+12+4+4+4+1] u8 ceil(wanted_range / MAP_BLOCKSIZE)
+		[2+12+12+4+4+4+1+1] u8 camera_inverted (bool)
+
 	*/
 
 	TOSERVER_GOTBLOCKS = 0x24,

src/network/serverpackethandler.cpp

@@ -478,11 +478,14 @@ void Server::process_PlayerPos(RemotePlayer *player, PlayerSAO *playersao,
 
 	f32 fov = 0;
 	u8 wanted_range = 0;
+	u8 bits = 0; // bits instead of bool so it is extensible later
 
 	*pkt >> keyPressed;
 	*pkt >> f32fov;
 	fov = (f32)f32fov / 80.0f;
 	*pkt >> wanted_range;
+	if (pkt->getRemainingBytes() >= 1)
+		*pkt >> bits;
 
 	v3f position((f32)ps.X / 100.0f, (f32)ps.Y / 100.0f, (f32)ps.Z / 100.0f);
 	v3f speed((f32)ss.X / 100.0f, (f32)ss.Y / 100.0f, (f32)ss.Z / 100.0f);
@@ -500,6 +503,7 @@ void Server::process_PlayerPos(RemotePlayer *player, PlayerSAO *playersao,
 	playersao->setPlayerYaw(yaw);
 	playersao->setFov(fov);
 	playersao->setWantedRange(wanted_range);
+	playersao->setCameraInverted(bits & 0x01);
 
 	player->control.unpackKeysPressed(keyPressed);
 

src/server/player_sao.h

@@ -105,6 +105,8 @@ public:
 	f32 getFov() const { return m_fov; }
 	void setWantedRange(const s16 range);
 	s16 getWantedRange() const { return m_wanted_range; }
+	void setCameraInverted(bool camera_inverted) { m_camera_inverted = camera_inverted; }
+	bool getCameraInverted() const { return m_camera_inverted; }
 
 	/*
 		Interaction interface
@@ -219,6 +221,8 @@ private:
 	f32 m_fov = 0.0f;
 	s16 m_wanted_range = 0.0f;
 
+	bool m_camera_inverted = false; // this is not store in the player db
+
 	SimpleMetadata m_meta;
 
 public:

src/serverenvironment.cpp

@@ -352,6 +352,8 @@ void ActiveBlockList::update(std::vector<PlayerSAO*> &active_players,
 			v3f camera_dir = v3f(0,0,1);
 			camera_dir.rotateYZBy(playersao->getLookPitch());
 			camera_dir.rotateXZBy(playersao->getRotation().Y);
+			if (playersao->getCameraInverted())
+				camera_dir = -camera_dir;
 			fillViewConeBlock(pos,
 				player_ao_range,
 				playersao->getEyePosition(),