This program is designed to simplify or replace needing to manually edit provinces.bmp and definition.csv when editing HOI4 Maps. The idea behind this program is that it unifies editing both files in one place with a graphical editor, as well as attempting to guarantee that all province maps created by this program will load correctly into the game.

This program is not a complete replacement for MapGen, it is intended to be used to edit a map you have already generated with MapGen, or for making tweaks to an already complete map.

To load a map, you can do one of the following:

• Drag a folder and it will look for a provinces.bmp and definition.csv inside that folder
• Drag a file and if its name is provinces.bmp or definition.csv, it will look in the same folder for the other file
• Drag a ZIP archive, and it will try to load provinces.bmp and definition.csv from the archive
• Use Ctrl-O or Ctrl-Alt-O to load a folder or archive using the file browser

By default, HOI4PE will scramble all of the province IDs in your definition.csv. If you are editing a pre-existing map, this will probably mess up states, strategic regions, etc. In order to mitigate this, you can set the preserve-ids key to true in hoi4pe_config.toml; this will attempt to keep the ID scrambling to a minimum, and if IDs do change, they will be logged to id_changes.txt.

In the terrain/biome map mode, the colors are based on what MapGen/ProvGen takes as input for terrain maps. In the coastal map mode, darker colors represent provinces that are not coastal, while lighter colors are coastal.

When painting continent IDs, you cannot paint continent 0 on land, and sea can only have continent 0.

• 1 Color/province map view mode
• 2 Terrain/biome map view mode
• 3 Land type map view mode
• 4 Continents map view mode
• 5 Coastal provinces map view mode
• 6 Adjacencies map view mode
• Left-click will draw with a color or map data while a color or some data is selected
• Right-click will grab and pan the camera around
• Middle-click will pick whatever color or map data that you are pointing at
• Scroll will zoom the map view
• Shift-Scroll will resize your brush when in color mode
• Ctrl-Z and Ctrl-Y are Undo and Redo, respectively
• Ctrl-Shift-S will Save-As, adding Alt will allow you to save as an archive
• Ctrl-S will Save, overwriting whatever map files you had imported
• Ctrl-O will let you open a map folder, adding Alt will allow you to select archives
• Spacebar will give you a new color/type/terrain/continent to paint with depending on map mode
• Shift-C will re-calculate coastal provinces
• Shift-R will randomly re-color all of the provinces on the map
• Shift-P will calculate and display symbols indicating map errors/warnings
• A switches to the area/brush tool
• B switches to the bucket/fill tool
• L switches to the lasso tool
• H resets the camera view
• Tab show all recent informative alert messages
• Escape to cancel a lasso
• Enter to complete a lasso

Adjacencies may be created by dragging from one province to another with Left-click. Note that HOI4 requires sea and land adjacencies to have a "through province" which you will have to specify manually.

• Map viewing, editing, manupulation, importing and exporting
• Flood-fill and polygonal lasso tools
• Support for custom terrain types via hoi4pe_config.toml
• Seeing map errors/warnings graphically (via Shift-P)
• Auto-generating which provinces are coastal (via Shift-C)
• Exporting terrain or land type view modes for MapGen/ProvGen
• Preserving province IDs (in order to not break maps)
• Viewing province ID numbers on the map
• Support for creating/editing adjacencies

1. Install Rust
2. Clone this repository to a folder and navigate there in your terminal
3. Run cargo build --release in that folder, wait for it to complete
4. The resulting executable should be located in /target/release