luanti/src/constants.h

// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

#pragma once

/*
	All kinds of constants.

	Cross-platform compatibility stuff should go in porting.h.

    Some things here are legacy.
*/

/*
    Network Protocol
*/

#define PEER_ID_INEXISTENT 0
#define PEER_ID_SERVER 1

// Define for simulating the quirks of sending through internet.
// Causes the socket class to deliberately drop random packets.
// This disables unit testing of socket and connection.
#define INTERNET_SIMULATOR 0
#define INTERNET_SIMULATOR_PACKET_LOSS 10 // 10 = easy, 4 = hard

#define CONNECTION_TIMEOUT 30

/*
    Server
*/

// This many blocks are sent when player is building
#define LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS 0
// Override for the previous one when distance of block is very low
#define BLOCK_SEND_DISABLE_LIMITS_MAX_D 1

/*
    Client/Server
*/

// Limit maximum dtime in client/server step(...) and for collision detection
#define DTIME_LIMIT 2.5f

/*
    Map-related things
*/

// The absolute working limit is (2^15 - viewing_range).
// I really don't want to make every algorithm to check if it's going near
// the limit or not, so this is lower.
// This is the maximum value the setting map_generation_limit can be
#define MAX_MAP_GENERATION_LIMIT (31007)

// Size of node in floating-point units
// The original idea behind this is to disallow plain casts between
// floating-point and integer positions, which potentially give wrong
// results. (negative coordinates, values between nodes, ...)
// Use floatToInt(p, BS) and intToFloat(p, BS).
#define BS 10.0f

// Dimension of a MapBlock in nodes
#define MAP_BLOCKSIZE 16

// Player step height in nodes
#define PLAYER_DEFAULT_STEPHEIGHT 0.6f

// Arbitrary volume limit for working with contiguous areas (in nodes)
// needs to safely fit in the VoxelArea class; used by e.g. VManips
#define MAX_WORKING_VOLUME 150000000UL

/*
    Old stuff that shouldn't be hardcoded
*/

// Size of player's main inventory
#define PLAYER_INVENTORY_SIZE (8 * 4)

// Default maximum health points of a player
#define PLAYER_MAX_HP_DEFAULT 20

// Default maximal breath of a player
#define PLAYER_MAX_BREATH_DEFAULT 10

/*
    Misc
*/

// Number of different files to try to save a player to if the first fails
// (because of a case-insensitive filesystem)
// TODO: Use case-insensitive player names instead of this hack.
#define PLAYER_FILE_ALTERNATE_TRIES 1000

// For screenshots a serial number is appended to the filename + datetimestamp
// if filename + datetimestamp is not unique.
// This is the maximum number of attempts to try and add a serial to the end of
// the file attempting to ensure a unique filename
#define SCREENSHOT_MAX_SERIAL_TRIES 1000

#define TTF_DEFAULT_FONT_SIZE (16)