README.md


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    Contents⊕
  
  
  Pacman,
  a naive implementation of the classic game in C++
  
  Git Repository
  Goals
  Supported Platforms
  Building Binaries
  Usage
  Bugfix Mode
  Implementation Status
  
  Done
  To Do
  
  Media Data
  Changes
  
  
Pacman,
a naive implementation of the classic game in C++
Original
document location.
Git Repository
This project's canonical repositories is hosted on Gothel
Software.
Goals
This project likes to demonstrate a complex system written in modern
C++ for our computer science class.
Besides management of animated sprite graphics, maze environment and
tile positioning, the interesting part might be the ghost's state
machine and their movements.
To implement the original pacman game behavior like weighted tile
collision, ghost algorithm, etc. - we have used the following documents
for reference

Jamey Pittman's The
Pac-Man Dossier
Understanding
Pac-Man Ghost Behavior
Why do
Pinky and Inky have different behaviors when Pac-Man is facing
up?

The implementation is inspired by Toru Iwatani's
original game Puckman.
Supported Platforms
C++17 and better where the SDL2
library is supported.
Building Binaries
The project requires make, g++ >= 8.3 and the libsdl2 for
building.
Installing build dependencies on Debian (11 or better):
apt install git build-essential g++ gcc libc-dev make
apt install libsdl2-dev libsdl2-image-dev libsdl2-ttf-dev libsdl2-mixer-dev
For a generic build use:
git clone https://jausoft.com/cgit/cs_class/pacman.git
cd pacman
make
The binary shall be build to bin/pacman.
Usage
Following commandline arguments are supported

-no_vsync to force off hardware enabled vsync, which in
turn enables manual fps synchronization
-fps <int> to enforce a specific fps value, which
will also set -no_vsync naturally
-speed <int> to set the 100% player speed in
fields per seconds
`-wwidth  to set the initial window width
`-wheight  to set the initial window height
-show_fps to show pacman's speed and to periodically
show the frames per seconds (fps) value on the console
-show_modes to show all players' mode changes
-show_moves to show all players' move criteria like
distance and collisions incl. speed changes on the console
-show_targets to show the ghost's target position as a
ray on the video screen
-show_debug_gfx to show all debug gfx
-show_all enable -show_modes,
-show_moves, -show_targets and
-show_debug_gfx
-no_ghosts to disable all ghosts
-bugfix to turn off the original puckman's behavior
(bugs), see Bugfix Mode below.
-audio to turn on audio effects, i.e. playing the audio
samples.
-level <int> to start at given level

bin/pacman [-no_vsync] [-fps <int>] [-speed <int>] [-wwidth <int>] [-wheight <int>] [-show_fps] [-show_modes] [-show_moves] [-show_targets] [-show_debug_gfx] [-show_all] [-no_ghosts] [-bugfix] [-audio] [-level <int>]
Bugfix Mode
With the -bugfix mode enabled, see Usage
above, the original puckman behavior (bugs) are disabled.
The list below shall be updated in case we further the implementation
and kept in sync with include/pacman/globals.hpp.
By default the original pacman behavior is being implemented:

weighted (round) tile position for collision tests
pinky's up-target not 4 ahead, but 4 ahead and 4 to the left
...

If false, a more accurate implementation, the pacman bugfix, is
used:

pixel accurate tile position for collision tests
pinky's up-traget to be 4 ahead as intended
...

Implementation Status
Done

Maze

Read maze specification from text file

Sprites
Speed per tile accurate key-frame animation

Weighted tile position from floating position
Renderer fps derived step width, i.e. sub-tiles
Sync speed by dropping tick, every n-frames

Ghost AI

Scared RNG target
Scatter and chase targets
Next move algo
Grouped wave switch of scatter, chase and frightened
Exit home using local and global pellet timer
PRNG with an identical seed value every new level and life for
predictable results

Level specification (per level)

Timings

scatter and chase duration per phase
frightening/powered duration

Speed

pacman normal on empty tile or eating
pacman powered on empty tile or eating
ghost speed normal, frightening or in tunnel

Score

Score

show eaten ghosts score onscreen

Sound

Using wav chunks, mixed from seperated channels


To Do

Ghost AI

Elroy 1+2 mode
Tunnel speed
Red-zones w/o turning up

Score

Fruits / Bonus

Pacman lives
Sound

Use lossy formats
Complete samples

Extension

Second play moves a ghost

Maze

Render maze itself from maze-spec file


Media Data
The pixel data in media/playfield_pacman.png and
media/tiles_all.png are copied from Arcade
- Pac-Man - General Sprites.png, which were submitted and created by
Superjustinbros and assumed to be in the public domain.
Changes
0.0.1

Initial commit with working status and prelim ghost algorithm.