Drop content_sao.{cpp,h}

Move LuaEntitySAO to a new dedicated file
Drop TestSAO (useless object)
Drop the old static startup initialized SAO factory, which was pretty useless.
This factory was using a std::map for 2 elements, now just use a simple condition owned by ServerEnvironment, which will be lightweight, that will also drop a one time useful test on each LuaEntitySAO creation. This should reduce server load on massive SAO creation

6 files changed, 704 insertions, 97 deletions

diff --git a/src/server/CMakeLists.txt b/src/server/CMakeLists.txt
index 26eaed5ac..4d94504f6 100644
--- a/src/server/CMakeLists.txt
+++ b/src/server/CMakeLists.txt
@@ -1,5 +1,6 @@
 set(server_SRCS
 	${CMAKE_CURRENT_SOURCE_DIR}/activeobjectmgr.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/luaentity_sao.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/mods.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/player_sao.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/serveractiveobject.cpp
diff --git a/src/server/luaentity_sao.cpp b/src/server/luaentity_sao.cpp
new file mode 100644
index 000000000..125939241
--- /dev/null
+++ b/src/server/luaentity_sao.cpp
@@ -0,0 +1,581 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+Copyright (C) 2013-2020 Minetest core developers & community
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "luaentity_sao.h"
+#include "collision.h"
+#include "constants.h"
+#include "player_sao.h"
+#include "scripting_server.h"
+#include "server.h"
+#include "serverenvironment.h"
+
+LuaEntitySAO::LuaEntitySAO(ServerEnvironment *env, v3f pos, const std::string &data)
+	: UnitSAO(env, pos)
+{
+	std::string name;
+	std::string state;
+	u16 hp = 1;
+	v3f velocity;
+	v3f rotation;
+
+	while (!data.empty()) { // breakable, run for one iteration
+		std::istringstream is(data, std::ios::binary);
+		// 'version' does not allow to incrementally extend the parameter list thus
+		// we need another variable to build on top of 'version=1'. Ugly hack but works™
+		u8 version2 = 0;
+		u8 version = readU8(is);
+
+		name = deSerializeString(is);
+		state = deSerializeLongString(is);
+
+		if (version < 1)
+			break;
+
+		hp = readU16(is);
+		velocity = readV3F1000(is);
+		// yaw must be yaw to be backwards-compatible
+		rotation.Y = readF1000(is);
+
+		if (is.good()) // EOF for old formats
+			version2 = readU8(is);
+
+		if (version2 < 1) // PROTOCOL_VERSION < 37
+			break;
+
+		// version2 >= 1
+		rotation.X = readF1000(is);
+		rotation.Z = readF1000(is);
+
+		// if (version2 < 2)
+		//     break;
+		// <read new values>
+		break;
+	}
+	// create object
+	infostream << "LuaEntitySAO::create(name=\"" << name << "\" state=\""
+			 << state << "\")" << std::endl;
+
+	m_init_name = name;
+	m_init_state = state;
+	m_hp = hp;
+	m_velocity = velocity;
+	m_rotation = rotation;
+}
+
+LuaEntitySAO::~LuaEntitySAO()
+{
+	if(m_registered){
+		m_env->getScriptIface()->luaentity_Remove(m_id);
+	}
+
+	for (u32 attached_particle_spawner : m_attached_particle_spawners) {
+		m_env->deleteParticleSpawner(attached_particle_spawner, false);
+	}
+}
+
+void LuaEntitySAO::addedToEnvironment(u32 dtime_s)
+{
+	ServerActiveObject::addedToEnvironment(dtime_s);
+
+	// Create entity from name
+	m_registered = m_env->getScriptIface()->
+		luaentity_Add(m_id, m_init_name.c_str());
+
+	if(m_registered){
+		// Get properties
+		m_env->getScriptIface()->
+			luaentity_GetProperties(m_id, this, &m_prop);
+		// Initialize HP from properties
+		m_hp = m_prop.hp_max;
+		// Activate entity, supplying serialized state
+		m_env->getScriptIface()->
+			luaentity_Activate(m_id, m_init_state, dtime_s);
+	} else {
+		m_prop.infotext = m_init_name;
+	}
+}
+
+void LuaEntitySAO::step(float dtime, bool send_recommended)
+{
+	if(!m_properties_sent)
+	{
+		m_properties_sent = true;
+		std::string str = getPropertyPacket();
+		// create message and add to list
+		ActiveObjectMessage aom(getId(), true, str);
+		m_messages_out.push(aom);
+	}
+
+	// If attached, check that our parent is still there. If it isn't, detach.
+	if(m_attachment_parent_id && !isAttached())
+	{
+		m_attachment_parent_id = 0;
+		m_attachment_bone = "";
+		m_attachment_position = v3f(0,0,0);
+		m_attachment_rotation = v3f(0,0,0);
+		sendPosition(false, true);
+	}
+
+	m_last_sent_position_timer += dtime;
+
+	// Each frame, parent position is copied if the object is attached, otherwise it's calculated normally
+	// If the object gets detached this comes into effect automatically from the last known origin
+	if(isAttached())
+	{
+		v3f pos = m_env->getActiveObject(m_attachment_parent_id)->getBasePosition();
+		m_base_position = pos;
+		m_velocity = v3f(0,0,0);
+		m_acceleration = v3f(0,0,0);
+	}
+	else
+	{
+		if(m_prop.physical){
+			aabb3f box = m_prop.collisionbox;
+			box.MinEdge *= BS;
+			box.MaxEdge *= BS;
+			collisionMoveResult moveresult;
+			f32 pos_max_d = BS*0.25; // Distance per iteration
+			v3f p_pos = m_base_position;
+			v3f p_velocity = m_velocity;
+			v3f p_acceleration = m_acceleration;
+			moveresult = collisionMoveSimple(m_env, m_env->getGameDef(),
+					pos_max_d, box, m_prop.stepheight, dtime,
+					&p_pos, &p_velocity, p_acceleration,
+					this, m_prop.collideWithObjects);
+
+			// Apply results
+			m_base_position = p_pos;
+			m_velocity = p_velocity;
+			m_acceleration = p_acceleration;
+		} else {
+			m_base_position += dtime * m_velocity + 0.5 * dtime
+					* dtime * m_acceleration;
+			m_velocity += dtime * m_acceleration;
+		}
+
+		if (m_prop.automatic_face_movement_dir &&
+				(fabs(m_velocity.Z) > 0.001 || fabs(m_velocity.X) > 0.001)) {
+			float target_yaw = atan2(m_velocity.Z, m_velocity.X) * 180 / M_PI
+				+ m_prop.automatic_face_movement_dir_offset;
+			float max_rotation_per_sec =
+					m_prop.automatic_face_movement_max_rotation_per_sec;
+
+			if (max_rotation_per_sec > 0) {
+				m_rotation.Y = wrapDegrees_0_360(m_rotation.Y);
+				wrappedApproachShortest(m_rotation.Y, target_yaw,
+					dtime * max_rotation_per_sec, 360.f);
+			} else {
+				// Negative values of max_rotation_per_sec mean disabled.
+				m_rotation.Y = target_yaw;
+			}
+		}
+	}
+
+	if(m_registered){
+		m_env->getScriptIface()->luaentity_Step(m_id, dtime);
+	}
+
+	if (!send_recommended)
+		return;
+
+	if(!isAttached())
+	{
+		// TODO: force send when acceleration changes enough?
+		float minchange = 0.2*BS;
+		if(m_last_sent_position_timer > 1.0){
+			minchange = 0.01*BS;
+		} else if(m_last_sent_position_timer > 0.2){
+			minchange = 0.05*BS;
+		}
+		float move_d = m_base_position.getDistanceFrom(m_last_sent_position);
+		move_d += m_last_sent_move_precision;
+		float vel_d = m_velocity.getDistanceFrom(m_last_sent_velocity);
+		if (move_d > minchange || vel_d > minchange ||
+				std::fabs(m_rotation.X - m_last_sent_rotation.X) > 1.0f ||
+				std::fabs(m_rotation.Y - m_last_sent_rotation.Y) > 1.0f ||
+				std::fabs(m_rotation.Z - m_last_sent_rotation.Z) > 1.0f) {
+
+			sendPosition(true, false);
+		}
+	}
+
+	if (!m_armor_groups_sent) {
+		m_armor_groups_sent = true;
+		// create message and add to list
+		m_messages_out.emplace(getId(), true, generateUpdateArmorGroupsCommand());
+	}
+
+	if (!m_animation_sent) {
+		m_animation_sent = true;
+		std::string str = generateUpdateAnimationCommand();
+		// create message and add to list
+		ActiveObjectMessage aom(getId(), true, str);
+		m_messages_out.push(aom);
+	}
+
+	if (!m_animation_speed_sent) {
+		m_animation_speed_sent = true;
+		std::string str = generateUpdateAnimationSpeedCommand();
+		// create message and add to list
+		ActiveObjectMessage aom(getId(), true, str);
+		m_messages_out.push(aom);
+	}
+
+	if (!m_bone_position_sent) {
+		m_bone_position_sent = true;
+		for (std::unordered_map<std::string, core::vector2d<v3f>>::const_iterator
+				ii = m_bone_position.begin(); ii != m_bone_position.end(); ++ii){
+			std::string str = generateUpdateBonePositionCommand((*ii).first,
+					(*ii).second.X, (*ii).second.Y);
+			// create message and add to list
+			ActiveObjectMessage aom(getId(), true, str);
+			m_messages_out.push(aom);
+		}
+	}
+
+	if (!m_attachment_sent) {
+		m_attachment_sent = true;
+		std::string str = generateUpdateAttachmentCommand();
+		// create message and add to list
+		ActiveObjectMessage aom(getId(), true, str);
+		m_messages_out.push(aom);
+	}
+}
+
+std::string LuaEntitySAO::getClientInitializationData(u16 protocol_version)
+{
+	std::ostringstream os(std::ios::binary);
+
+	// PROTOCOL_VERSION >= 37
+	writeU8(os, 1); // version
+	os << serializeString(""); // name
+	writeU8(os, 0); // is_player
+	writeU16(os, getId()); //id
+	writeV3F32(os, m_base_position);
+	writeV3F32(os, m_rotation);
+	writeU16(os, m_hp);
+
+	std::ostringstream msg_os(std::ios::binary);
+	msg_os << serializeLongString(getPropertyPacket()); // message 1
+	msg_os << serializeLongString(generateUpdateArmorGroupsCommand()); // 2
+	msg_os << serializeLongString(generateUpdateAnimationCommand()); // 3
+	for (std::unordered_map<std::string, core::vector2d<v3f>>::const_iterator
+			ii = m_bone_position.begin(); ii != m_bone_position.end(); ++ii) {
+		msg_os << serializeLongString(generateUpdateBonePositionCommand((*ii).first,
+				(*ii).second.X, (*ii).second.Y)); // m_bone_position.size
+	}
+	msg_os << serializeLongString(generateUpdateAttachmentCommand()); // 4
+	int message_count = 4 + m_bone_position.size();
+	for (std::unordered_set<int>::const_iterator ii = m_attachment_child_ids.begin();
+			(ii != m_attachment_child_ids.end()); ++ii) {
+		if (ServerActiveObject *obj = m_env->getActiveObject(*ii)) {
+			message_count++;
+			// TODO after a protocol bump: only send the object initialization data
+			// to older clients (superfluous since this message exists)
+			msg_os << serializeLongString(obj->generateUpdateInfantCommand(*ii, protocol_version));
+		}
+	}
+
+	msg_os << serializeLongString(generateSetTextureModCommand());
+	message_count++;
+
+	writeU8(os, message_count);
+	os.write(msg_os.str().c_str(), msg_os.str().size());
+
+	// return result
+	return os.str();
+}
+
+void LuaEntitySAO::getStaticData(std::string *result) const
+{
+	verbosestream<<FUNCTION_NAME<<std::endl;
+	std::ostringstream os(std::ios::binary);
+	// version must be 1 to keep backwards-compatibility. See version2
+	writeU8(os, 1);
+	// name
+	os<<serializeString(m_init_name);
+	// state
+	if(m_registered){
+		std::string state = m_env->getScriptIface()->
+			luaentity_GetStaticdata(m_id);
+		os<<serializeLongString(state);
+	} else {
+		os<<serializeLongString(m_init_state);
+	}
+	writeU16(os, m_hp);
+	writeV3F1000(os, m_velocity);
+	// yaw
+	writeF1000(os, m_rotation.Y);
+
+	// version2. Increase this variable for new values
+	writeU8(os, 1); // PROTOCOL_VERSION >= 37
+
+	writeF1000(os, m_rotation.X);
+	writeF1000(os, m_rotation.Z);
+
+	// <write new values>
+
+	*result = os.str();
+}
+
+u16 LuaEntitySAO::punch(v3f dir,
+		const ToolCapabilities *toolcap,
+		ServerActiveObject *puncher,
+		float time_from_last_punch)
+{
+	if (!m_registered) {
+		// Delete unknown LuaEntities when punched
+		m_pending_removal = true;
+		return 0;
+	}
+
+	FATAL_ERROR_IF(!puncher, "Punch action called without SAO");
+
+	s32 old_hp = getHP();
+	ItemStack selected_item, hand_item;
+	ItemStack tool_item = puncher->getWieldedItem(&selected_item, &hand_item);
+
+	PunchDamageResult result = getPunchDamage(
+			m_armor_groups,
+			toolcap,
+			&tool_item,
+			time_from_last_punch);
+
+	bool damage_handled = m_env->getScriptIface()->luaentity_Punch(m_id, puncher,
+			time_from_last_punch, toolcap, dir, result.did_punch ? result.damage : 0);
+
+	if (!damage_handled) {
+		if (result.did_punch) {
+			setHP((s32)getHP() - result.damage,
+				PlayerHPChangeReason(PlayerHPChangeReason::PLAYER_PUNCH, puncher));
+
+			// create message and add to list
+			sendPunchCommand();
+		}
+	}
+
+	if (getHP() == 0 && !isGone()) {
+		clearParentAttachment();
+		clearChildAttachments();
+		m_env->getScriptIface()->luaentity_on_death(m_id, puncher);
+		m_pending_removal = true;
+	}
+
+	actionstream << puncher->getDescription() << " (id=" << puncher->getId() <<
+			", hp=" << puncher->getHP() << ") punched " <<
+			getDescription() << " (id=" << m_id << ", hp=" << m_hp <<
+			"), damage=" << (old_hp - (s32)getHP()) <<
+			(damage_handled ? " (handled by Lua)" : "") << std::endl;
+
+	// TODO: give Lua control over wear
+	return result.wear;
+}
+
+void LuaEntitySAO::rightClick(ServerActiveObject *clicker)
+{
+	if (!m_registered)
+		return;
+
+	m_env->getScriptIface()->luaentity_Rightclick(m_id, clicker);
+}
+
+void LuaEntitySAO::setPos(const v3f &pos)
+{
+	if(isAttached())
+		return;
+	m_base_position = pos;
+	sendPosition(false, true);
+}
+
+void LuaEntitySAO::moveTo(v3f pos, bool continuous)
+{
+	if(isAttached())
+		return;
+	m_base_position = pos;
+	if(!continuous)
+		sendPosition(true, true);
+}
+
+float LuaEntitySAO::getMinimumSavedMovement()
+{
+	return 0.1 * BS;
+}
+
+std::string LuaEntitySAO::getDescription()
+{
+	std::ostringstream oss;
+	oss << "LuaEntitySAO \"" << m_init_name << "\" ";
+	auto pos = floatToInt(m_base_position, BS);
+	oss << "at " << PP(pos);
+	return oss.str();
+}
+
+void LuaEntitySAO::setHP(s32 hp, const PlayerHPChangeReason &reason)
+{
+	m_hp = rangelim(hp, 0, U16_MAX);
+}
+
+u16 LuaEntitySAO::getHP() const
+{
+	return m_hp;
+}
+
+void LuaEntitySAO::setVelocity(v3f velocity)
+{
+	m_velocity = velocity;
+}
+
+v3f LuaEntitySAO::getVelocity()
+{
+	return m_velocity;
+}
+
+void LuaEntitySAO::setAcceleration(v3f acceleration)
+{
+	m_acceleration = acceleration;
+}
+
+v3f LuaEntitySAO::getAcceleration()
+{
+	return m_acceleration;
+}
+
+void LuaEntitySAO::setTextureMod(const std::string &mod)
+{
+	m_current_texture_modifier = mod;
+	// create message and add to list
+	m_messages_out.emplace(getId(), true, generateSetTextureModCommand());
+}
+
+std::string LuaEntitySAO::getTextureMod() const
+{
+	return m_current_texture_modifier;
+}
+
+
+std::string LuaEntitySAO::generateSetTextureModCommand() const
+{
+	std::ostringstream os(std::ios::binary);
+	// command
+	writeU8(os, AO_CMD_SET_TEXTURE_MOD);
+	// parameters
+	os << serializeString(m_current_texture_modifier);
+	return os.str();
+}
+
+std::string LuaEntitySAO::generateSetSpriteCommand(v2s16 p, u16 num_frames,
+	f32 framelength, bool select_horiz_by_yawpitch)
+{
+	std::ostringstream os(std::ios::binary);
+	// command
+	writeU8(os, AO_CMD_SET_SPRITE);
+	// parameters
+	writeV2S16(os, p);
+	writeU16(os, num_frames);
+	writeF32(os, framelength);
+	writeU8(os, select_horiz_by_yawpitch);
+	return os.str();
+}
+
+void LuaEntitySAO::setSprite(v2s16 p, int num_frames, float framelength,
+		bool select_horiz_by_yawpitch)
+{
+	std::string str = generateSetSpriteCommand(
+		p,
+		num_frames,
+		framelength,
+		select_horiz_by_yawpitch
+	);
+	// create message and add to list
+	m_messages_out.emplace(getId(), true, str);
+}
+
+std::string LuaEntitySAO::getName()
+{
+	return m_init_name;
+}
+
+std::string LuaEntitySAO::getPropertyPacket()
+{
+	return generateSetPropertiesCommand(m_prop);
+}
+
+void LuaEntitySAO::sendPosition(bool do_interpolate, bool is_movement_end)
+{
+	// If the object is attached client-side, don't waste bandwidth sending its position to clients
+	if(isAttached())
+		return;
+
+	m_last_sent_move_precision = m_base_position.getDistanceFrom(
+			m_last_sent_position);
+	m_last_sent_position_timer = 0;
+	m_last_sent_position = m_base_position;
+	m_last_sent_velocity = m_velocity;
+	//m_last_sent_acceleration = m_acceleration;
+	m_last_sent_rotation = m_rotation;
+
+	float update_interval = m_env->getSendRecommendedInterval();
+
+	std::string str = generateUpdatePositionCommand(
+		m_base_position,
+		m_velocity,
+		m_acceleration,
+		m_rotation,
+		do_interpolate,
+		is_movement_end,
+		update_interval
+	);
+	// create message and add to list
+	m_messages_out.emplace(getId(), false, str);
+}
+
+bool LuaEntitySAO::getCollisionBox(aabb3f *toset) const
+{
+	if (m_prop.physical)
+	{
+		//update collision box
+		toset->MinEdge = m_prop.collisionbox.MinEdge * BS;
+		toset->MaxEdge = m_prop.collisionbox.MaxEdge * BS;
+
+		toset->MinEdge += m_base_position;
+		toset->MaxEdge += m_base_position;
+
+		return true;
+	}
+
+	return false;
+}
+
+bool LuaEntitySAO::getSelectionBox(aabb3f *toset) const
+{
+	if (!m_prop.is_visible || !m_prop.pointable) {
+		return false;
+	}
+
+	toset->MinEdge = m_prop.selectionbox.MinEdge * BS;
+	toset->MaxEdge = m_prop.selectionbox.MaxEdge * BS;
+
+	return true;
+}
+
+bool LuaEntitySAO::collideWithObjects() const
+{
+	return m_prop.collideWithObjects;
+}
diff --git a/src/server/luaentity_sao.h b/src/server/luaentity_sao.h
new file mode 100644
index 000000000..2520c8f5d
--- /dev/null
+++ b/src/server/luaentity_sao.h
@@ -0,0 +1,93 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+Copyright (C) 2013-2020 Minetest core developers & community
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+
+#include "unit_sao.h"
+
+class LuaEntitySAO : public UnitSAO
+{
+public:
+	LuaEntitySAO() = delete;
+	// Used by the environment to load SAO
+	LuaEntitySAO(ServerEnvironment *env, v3f pos, const std::string &data);
+	// Used by the Lua API
+	LuaEntitySAO(ServerEnvironment *env, v3f pos, const std::string &name,
+			const std::string &state) :
+			UnitSAO(env, pos),
+			m_init_name(name), m_init_state(state)
+	{
+	}
+	~LuaEntitySAO();
+	ActiveObjectType getType() const { return ACTIVEOBJECT_TYPE_LUAENTITY; }
+	ActiveObjectType getSendType() const { return ACTIVEOBJECT_TYPE_GENERIC; }
+	virtual void addedToEnvironment(u32 dtime_s);
+	void step(float dtime, bool send_recommended);
+	std::string getClientInitializationData(u16 protocol_version);
+	bool isStaticAllowed() const { return m_prop.static_save; }
+	void getStaticData(std::string *result) const;
+	u16 punch(v3f dir, const ToolCapabilities *toolcap = nullptr,
+			ServerActiveObject *puncher = nullptr,
+			float time_from_last_punch = 1000000.0f);
+	void rightClick(ServerActiveObject *clicker);
+	void setPos(const v3f &pos);
+	void moveTo(v3f pos, bool continuous);
+	float getMinimumSavedMovement();
+	std::string getDescription();
+	void setHP(s32 hp, const PlayerHPChangeReason &reason);
+	u16 getHP() const;
+
+	/* LuaEntitySAO-specific */
+	void setVelocity(v3f velocity);
+	void addVelocity(v3f velocity) { m_velocity += velocity; }
+	v3f getVelocity();
+	void setAcceleration(v3f acceleration);
+	v3f getAcceleration();
+
+	void setTextureMod(const std::string &mod);
+	std::string getTextureMod() const;
+	void setSprite(v2s16 p, int num_frames, float framelength,
+			bool select_horiz_by_yawpitch);
+	std::string getName();
+	bool getCollisionBox(aabb3f *toset) const;
+	bool getSelectionBox(aabb3f *toset) const;
+	bool collideWithObjects() const;
+
+private:
+	std::string getPropertyPacket();
+	void sendPosition(bool do_interpolate, bool is_movement_end);
+	std::string generateSetTextureModCommand() const;
+	static std::string generateSetSpriteCommand(v2s16 p, u16 num_frames,
+			f32 framelength, bool select_horiz_by_yawpitch);
+
+	std::string m_init_name;
+	std::string m_init_state;
+	bool m_registered = false;
+
+	v3f m_velocity;
+	v3f m_acceleration;
+
+	v3f m_last_sent_position;
+	v3f m_last_sent_velocity;
+	v3f m_last_sent_rotation;
+	float m_last_sent_position_timer = 0.0f;
+	float m_last_sent_move_precision = 0.0f;
+	std::string m_current_texture_modifier = "";
+};
diff --git a/src/server/player_sao.h b/src/server/player_sao.h
index ce1cb1677..8571bd4f9 100644
--- a/src/server/player_sao.h
+++ b/src/server/player_sao.h
@@ -1,4 +1,3 @@
-
 /*
 Minetest
 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
@@ -19,6 +18,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
+#pragma once
+
 #include "constants.h"
 #include "network/networkprotocol.h"
 #include "unit_sao.h"
@@ -32,33 +33,31 @@ class LagPool
 {
 	float m_pool = 15.0f;
 	float m_max = 15.0f;
+
 public:
 	LagPool() = default;
 
 	void setMax(float new_max)
 	{
 		m_max = new_max;
-		if(m_pool > new_max)
+		if (m_pool > new_max)
 			m_pool = new_max;
 	}
 
 	void add(float dtime)
 	{
 		m_pool -= dtime;
-		if(m_pool < 0)
+		if (m_pool < 0)
 			m_pool = 0;
 	}
 
-	void empty()
-	{
-		m_pool = m_max;
-	}
+	void empty() { m_pool = m_max; }
 
 	bool grab(float dtime)
 	{
-		if(dtime <= 0)
+		if (dtime <= 0)
 			return true;
-		if(m_pool + dtime > m_max)
+		if (m_pool + dtime > m_max)
 			return false;
 		m_pool += dtime;
 		return true;
@@ -73,10 +72,8 @@ public:
 	PlayerSAO(ServerEnvironment *env_, RemotePlayer *player_, session_t peer_id_,
 			bool is_singleplayer);
 
-	ActiveObjectType getType() const
-	{ return ACTIVEOBJECT_TYPE_PLAYER; }
-	ActiveObjectType getSendType() const
-	{ return ACTIVEOBJECT_TYPE_GENERIC; }
+	ActiveObjectType getType() const { return ACTIVEOBJECT_TYPE_PLAYER; }
+	ActiveObjectType getSendType() const { return ACTIVEOBJECT_TYPE_GENERIC; }
 	std::string getDescription();
 
 	/*
@@ -111,10 +108,8 @@ public:
 		Interaction interface
 	*/
 
-	u16 punch(v3f dir,
-		const ToolCapabilities *toolcap,
-		ServerActiveObject *puncher,
-		float time_from_last_punch);
+	u16 punch(v3f dir, const ToolCapabilities *toolcap, ServerActiveObject *puncher,
+			float time_from_last_punch);
 	void rightClick(ServerActiveObject *clicker) {}
 	void setHP(s32 hp, const PlayerHPChangeReason &reason);
 	void setHPRaw(u16 hp) { m_hp = hp; }
@@ -144,10 +139,7 @@ public:
 
 	// Cheat prevention
 
-	v3f getLastGoodPosition() const
-	{
-		return m_last_good_position;
-	}
+	v3f getLastGoodPosition() const { return m_last_good_position; }
 	float resetTimeFromLastPunch()
 	{
 		float r = m_time_from_last_punch;
@@ -159,30 +151,17 @@ public:
 		m_nocheat_dig_pos = p;
 		m_nocheat_dig_time = 0;
 	}
-	v3s16 getNoCheatDigPos()
-	{
-		return m_nocheat_dig_pos;
-	}
-	float getNoCheatDigTime()
-	{
-		return m_nocheat_dig_time;
-	}
-	void noCheatDigEnd()
-	{
-		m_nocheat_dig_pos = v3s16(32767, 32767, 32767);
-	}
-	LagPool& getDigPool()
-	{
-		return m_dig_pool;
-	}
+	v3s16 getNoCheatDigPos() { return m_nocheat_dig_pos; }
+	float getNoCheatDigTime() { return m_nocheat_dig_time; }
+	void noCheatDigEnd() { m_nocheat_dig_pos = v3s16(32767, 32767, 32767); }
+	LagPool &getDigPool() { return m_dig_pool; }
 	void setMaxSpeedOverride(const v3f &vel);
 	// Returns true if cheated
 	bool checkMovementCheat();
 
 	// Other
 
-	void updatePrivileges(const std::set<std::string> &privs,
-			bool is_singleplayer)
+	void updatePrivileges(const std::set<std::string> &privs, bool is_singleplayer)
 	{
 		m_privs = privs;
 		m_is_singleplayer = is_singleplayer;
@@ -236,6 +215,7 @@ private:
 	s16 m_wanted_range = 0.0f;
 
 	Metadata m_meta;
+
 public:
 	float m_physics_override_speed = 1.0f;
 	float m_physics_override_jump = 1.0f;
@@ -246,9 +226,10 @@ public:
 	bool m_physics_override_sent = false;
 };
 
-
-struct PlayerHPChangeReason {
-	enum Type : u8 {
+struct PlayerHPChangeReason
+{
+	enum Type : u8
+	{
 		SET_HP,
 		PLAYER_PUNCH,
 		FALL,
@@ -266,10 +247,7 @@ struct PlayerHPChangeReason {
 	// For NODE_DAMAGE
 	std::string node;
 
-	inline bool hasLuaReference() const
-	{
-		return lua_reference >= 0;
-	}
+	inline bool hasLuaReference() const { return lua_reference >= 0; }
 
 	bool setTypeFromString(const std::string &typestr)
 	{
@@ -311,15 +289,12 @@ struct PlayerHPChangeReason {
 		}
 	}
 
-	PlayerHPChangeReason(Type type):
-			type(type)
-	{}
+	PlayerHPChangeReason(Type type) : type(type) {}
 
-	PlayerHPChangeReason(Type type, ServerActiveObject *object):
+	PlayerHPChangeReason(Type type, ServerActiveObject *object) :
 			type(type), object(object)
-	{}
+	{
+	}
 
-	PlayerHPChangeReason(Type type, std::string node):
-			type(type), node(node)
-	{}
+	PlayerHPChangeReason(Type type, std::string node) : type(type), node(node) {}
 };
diff --git a/src/server/serveractiveobject.cpp b/src/server/serveractiveobject.cpp
index 3aa78c7d5..8345ebd47 100644
--- a/src/server/serveractiveobject.cpp
+++ b/src/server/serveractiveobject.cpp
@@ -30,39 +30,6 @@ ServerActiveObject::ServerActiveObject(ServerEnvironment *env, v3f pos):
 {
 }
 
-ServerActiveObject* ServerActiveObject::create(ActiveObjectType type,
-		ServerEnvironment *env, u16 id, v3f pos,
-		const std::string &data)
-{
-	// Find factory function
-	std::map<u16, Factory>::iterator n;
-	n = m_types.find(type);
-	if(n == m_types.end()) {
-		// These are 0.3 entity types, return without error.
-		if (ACTIVEOBJECT_TYPE_ITEM <= type && type <= ACTIVEOBJECT_TYPE_MOBV2) {
-			return NULL;
-		}
-
-		// If factory is not found, just return.
-		warningstream<<"ServerActiveObject: No factory for type="
-				<<type<<std::endl;
-		return NULL;
-	}
-
-	Factory f = n->second;
-	ServerActiveObject *object = (*f)(env, pos, data);
-	return object;
-}
-
-void ServerActiveObject::registerType(u16 type, Factory f)
-{
-	std::map<u16, Factory>::iterator n;
-	n = m_types.find(type);
-	if(n != m_types.end())
-		return;
-	m_types[type] = f;
-}
-
 float ServerActiveObject::getMinimumSavedMovement()
 {
 	return 2.0*BS;
diff --git a/src/server/serveractiveobject.h b/src/server/serveractiveobject.h
index 2e013a6b6..927009aef 100644
--- a/src/server/serveractiveobject.h
+++ b/src/server/serveractiveobject.h
@@ -244,12 +244,6 @@ protected:
 	virtual void onAttach(int parent_id) {}
 	virtual void onDetach(int parent_id) {}
 
-	// Used for creating objects based on type
-	typedef ServerActiveObject* (*Factory)
-			(ServerEnvironment *env, v3f pos,
-			const std::string &data);
-	static void registerType(u16 type, Factory f);
-
 	ServerEnvironment *m_env;
 	v3f m_base_position;
 	std::unordered_set<u32> m_attached_particle_spawners;
@@ -258,8 +252,4 @@ protected:
 		Queue of messages to be sent to the client
 	*/
 	std::queue<ActiveObjectMessage> m_messages_out;
-
-private:
-	// Used for creating objects based on type
-	static std::map<u16, Factory> m_types;
 };