This repository contains a basic C++ implementation of the core concept of the mobile game Influence. Only the core mechanism is implemented, and only random agents are available.

The code needs the following libraries to compile:

• C++17 compiler
• SDL2
• SDL2_gfx
• SDL2_ttf

To compile, simply clone the directory and run make.

To run the game, simply run: ./main path/to/file.map

A GUI map editor is also available; to edit a .map file, run: ./main -e path/to/file.map The map editor is controlled through the keyboard. Keybindings are as follows:

• w, h and n, followed by a number and confirmed by pressing Enter to resp. modify the width, the height and the number of teams on the map
• hjkl to move from cell to cell (vim style)
• t/T to modify the team of the current cell (forward/backward)
• u/U to modify the value of the current cell (more/less)
• 123456 to toggle existing links around the current cell
• s/S to save/save as... the current map

The map files are binary files that contain the information of every cell in a grid. These files can be generated through the map editor presented above, or by writing a CSV file that represents the map and then converting it using the generate_map binary.

A valid CSV file should have the following format: Header: the first line must be w,h,n with w, h and n the width, height and number of teams on the map respectively h following lines: each line must be composed of w cell encoding separated by commas, e.g. C1,C2,C3,C4,C5 for a width of 5 Note: As the grid is hexagonal, the last cell of one line out of two is ignored.

A cell is encoded in the following format: {value}[:{team}][/{missing_links}][+] where:

• value is the value of the cell
• team represents the current team of the cell: from 1 to n for teams, and 0 for a neutral cell. If omitted, the team defaults to 0 (neutral cell).
• missing_links is a list of integers between 1 and 6 that correponds to the links from the current cell to the neighbour cells that must be removed. The link 1 is the link to the up-right cell, and the others follow in clockwise manner (2: cell to the right, 3: bottom-right etc.). If omitted, the cell has all possible links to its neighbours.
• + indicates if the cell has a max value of 8 (without +) or 12 (with +) To omit a cell completely (inactive cell), just leave the encoding empty.

Examples:

• 2:1/13+ corresponds to a cell of value 2 in team 1 with the 1st and 3rd links missing, and of maximal value 12
• 4/2 corresponds to a neutral cell (team 0) of value 4 with the 2nd link missing (to the right)
• 0+ corresponds to a neutral cell of value 0 of maximal value 12

An example can be found in the file maps/example.csv. To see its corresponding map, convert it using ./generate_map maps/example.csv and play (or edit it) using ./main [-e] maps/example.map.

Warning: The missing links must be coherent ! If a cell has the 2nd link removed (cell to the right), then the corresponding cell must have the 5th link removed ! If this condition is not respected, the generate_map binary will complain and won't create the .map file.