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Installation Instructions

Hikou no mizu can be installed in GNU/Linux, *BSD, Haiku, macOS, and Windows systems.
Packages are available to ease installation on some systems. If not, the game can be compiled from source using CMake.

Flatpak

For many desktop Linux distributions, a flatpak package allows to easily install Hikou no mizu 1.1, following the instructions in:
https://www.flathub.org/apps/details/org.hikounomizu.HikouNoMizu

Flatpak provides a convenient way to distribute the game to many Linux distributions.
However, if you would rather not use it, the game can be compiled from source.

AUR

Hikou no mizu 1.1 is available on the Arch User Repository (AUR) for users of Archlinux-based Linux distributions, such as Archlinux itself or Manjaro:
https://aur.archlinux.org/packages/hikounomizu

As such, it can be installed using a simple command such as:

# yay -S hikounomizu

Haiku

A package for Hikou no mizu is available in the HaikuDepot.
A merge request to update the package to 1.1 is under review.
In the meantime, see the Source section below to compile it from source.

Windows

A build for windows64 is available here.
It is a cross-compiled MinGW build, and comes without installer, simply uncompress the file and run hikounomizu.exe

MacOS

The game is known to work, but no package has been setup yet.
In the meantime, see the Source section below to compile it from source.

Source

Compiling Hikou no mizu 1.1 from source is required to install it on *BSD systems.
Hikou no mizu uses CMake as a build system, which will assist you in the build process. It will especially report any missing dependency.

The sources of Hikou no mizu 1.1 can be downloaded here. This is the version which ships pre-built data, so that you do not need to regenerate framesheets from vectorized animation files, among others. Otherwise, the version with non-built data sources is available here.

Changelog

1.1

• Added blocking and perfect blocking support
  • Players can enter a blocking state by holding a block key while standing or crouching
  • Blocking activates a 'block box', which will block attacks hitting it
    • When blocking while standing up, players are still vulnerable to low attacks
    • When blocking while crouching down, players are still vulnerable to high attacks
  • Blocked attacks will trigger a shorter stun time than regular hits and sustain 5x less damage
  • Perfect blocking happens when the block key is pressed almost exactly as the attack lands
    • No damage is sustained and no stun animation is triggered
    • The attack is blocked regardless of its hit point, including weapon throws
• Tweaked animation and hit timings
  • Removed the hardcoded cooldown period after each attack
  • Instead, the cooldown period is integrated in attack animations as a visible recovery time
  • Increased the duration of most attack animations to more sensible values vs. reaction time
• AI
  • Rewritten the AI to be smarter and more challenging
  • It can jump over obstacles and should get stuck much less often
  • It makes uses of the new blocking system and does less random things
• Graphics
  • Drastically improved text rendering performance by implementing a font atlas
  • Added a simple particle system, triggered on perfect blocks
  • Added a player event banner, to notify of perfect blocks
  • Added a visualization of block boxes in the 'show hitboxes' mode
• Localization
  • Added an Esperanto translation
• Bugfixes
  • Fixed camera shake sometimes not triggering in networked mode
  • Fixed the player-to-ground collision check at high framerates
• Tool updates
  • Updated to CMake 3.25 to use the native FindOpenAL script
  • Updated the data building script to use imagemagick 7+ interface
  • Updated the animation files to synfig 1.5.1 format

1.0.1

• Added internationalization support
• Added Spanish, French and Norwegian translations

1.0

• Networked game: introduced networked multiplayer gaming
  • Introduced an enet-based protocol for networked games
  • Introduced a game server hikounomizud
    • Awaits for players to connect, orchestrates a networked game
    • Awaits in lobby mode (players can join and are respawned when KO) until enough players are connected
    • Starts a formal game when enough players are connected
    • When a game is completed, performs matchmaking and optionally change arena
    • Added server documentation in README
    • Added an inactivity tracking mechanism to optionally kick inactive players
    • Added a server event mechanism to send informative messages to clients
    • Added version checking (server and client are considered compatible iff only the patch version is different)
    • Added data path checking (shows a warning if the game data was not found by the server)
  • Introduced a game client
    • Connects to a remote game server
    • Displays the current scene and sends inputs
    • Added a connected players/ping dialog visible when pressing tab
    • Added a server event logger that displays incoming server messages
    • Added floating name tags on top of connected players
    • Added a networked game pause tab
  • Introduced a Multiplayer lobby scene
    • Allows selecting a client username and played character
    • Allows connecting to a remote server
    • Added a text input widget to type free utf8 text
      • Supports composition and input method editors (IME)
• Gameplay
  • Added a new character: Hana! Mid-range gameplay and uses the fire element
  • Added a new arena: Traezh, which makes use of the under-used platform system, allows rock climbing
  • Reworked Evig Sol, added more climbeable and hitable platforms to add gameplay variety
  • Added a round handling system
    • A game consists of one of (optionally) several rounds
    • The winner is the first one to win the required amount of rounds
    • Up to 5 rounds to win in local games, more in networked games
    • Added a round announcer at the beginning of a round
    • Added a graphical indicator of the number of rounds won per player
    • Added a round completed scene at the end of a fight, with character icon, name and round win statistics
  • Allow simultaneous hits within a short time window and therefore allow draw games
  • Make fight scenes more flexible, allow adding and removing players mid-game (used in networked mode)
  • Defined spawns for at least 6 players in each arena
  • Tweaked characters speed, jump energy, attack timings and strength to increase balance
  • Fixed various hit boxes location and size
  • Disabled key repeat (holding in punch will only punch once)
  • Fixed integration of physics velocity and position
    • Earlier code would produce different jump trajectories for different frame rates
    • Use analytical integration to produce the same trajectories for any time step
• Graphics
  • Fixed text size computation in some corner cases
  • Fixed text kerning that had been broken
  • Added a camera shake effect on player hit
  • Added support for borderless or native fullscreen modes
  • Minor graphical glitch fixes on Takino default punch and kick, as well as moving default and kick animations
• Audio
  • Added ambient sound support per arena
  • Harmonized and increased sound effects volume
  • Added sound effects for Takino and Hana
  • Added sand step sound effect
  • Added shuriken flying 'whoosh' sound effect
  • Added shuriken to shuriken impact sound effect
  • Added 'Fight!' sound effect at the beginning of a round
  • Added elemental sounds effects (fire, water, lightning) played on some attacks
  • Added ability to configure the pitch variation for each sound effect
    • Reduce the pitch variation for character kick/punch/hit sound effects
  • Harmonized and reduced music volume
    • Added new musics and changed some existing musics (see datasrc/COPYING)
  • Improved music error handling (remove a music from the playlist if not found)
• Joystick
  • Added SDL game controller support to automatically assign default bindings
  • Added an option to revert the bindings of a game controller to the default
• GUI
  • Make display coordinates relative, stretching the GUI to look nice on high and low resolutions
  • Updated the GUI theme to be more consistent and arguably look nicer
  • Unified theme for section headers
  • Re-drawn 'Hikou no mizu' title banner
  • Replaced the default 'Liberation Sans' font by 'Murecho'
  • Replaced the display 'Intuitive' font by 'Mochiy Pop'
  • Rewritten/simplified main menu to allow selecting player count and rounds to win in local games
  • Added an option to select up to 6 players (vs. 5 before the update) for local games
  • Added a dialog widget to notify of an ongoing action (used when connecting to a server)
  • Improved chooser layouts to make all selections reachable
  • Ceil the player health points value to display 1 rather than 0 for a fraction of a health point
• Configuration
  • Follow the XDG base directory specification on GNU/Linux
  • Make the configuration file reader robust to empty lines
  • Added a server configuration reader/writer
    • Default configuration can be written to a file using hikounomizud -e path.cfg
    • List of configuration options in README
  • Added client configuration options
    • Ability to show/hide the frame rate counter
    • Ability to save/read the client username and played character in networked games
    • Ability to enable/disable the new camera shake effect on player hit
    • Ability to change the relative volume of the new ambient sound effects
• Build system
  • Allow configuring the amount of parallel tasks for data building (HNM_PARALLEL environment variable)
  • Take rounding errors into account in animation rendering to avoid glitches in game
  • Exit data builder cleanly when terminated
  • Add options to build only the server or only the client
  • Added a script filter_data.sh to filter out the data that is not needed by the server
  • Working MinGW building
• Under the hood
  • Restructured code to separate core gameplay mechanisms from graphics and audio systems
    • Allows the server to run fights in memory
  • Added serializers for primitive types and game objects to be exchanged in networked mode
  • Restart local games much faster by not reloading every piece of data
  • Switch to std::chrono, increasing time measurement precision
  • Moved versus mode handling from Player to a dedicated fight mode system
  • Rewritten and much simplified playlist and music playing system
  • Added SDL_Image initialization checks and error handling
  • Make the utf8 decoder more strict to malformed utf8 input
  • Various cleanup and source code modernizing (C++11 standard)
  • Faster compilation by using forward declarations when relevant
• Bug fixes
  • Fixed AI cheating in versus mode (able to hit backwards)
  • Fixed the ability of AI to run into their own shurikens :)
  • Fixed the ability to jump higher by calling jump() multiple times in a row
  • Added a physics epsilon to avoid collision errors due to float rounding errors
    • Especially relevant in networked mode which transmits floats at a lower precision
  • Fixed a bug that could allow selecting only one player for a local game
  • Fixed a bug that would have done weird things when loading a malformed ogg file
  • Generally improved error checking and robustness of resources loading
  • Use ov_fopen to open sound files rather than ov_open that causes permission issues on some platforms
• Documentation
  • Improved logs and added library information logs
  • Made the code documentation style consistent
  • Rewrote README to use markdown
  • Moved the changelog to a dedicated file CHANGES.md
  • Moved the data license to datasrc/COPYING