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Page: How to delete a map
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Ability Switcher via special Add A PokeVial Item Add Ability to Avoid Battle Damage in Debug Menu Add Ability to Swap Bikes Whenever Add Choice Specs Scarf hold item effects Add Description Submenu Add Difficulty Mode Add In‐Cart Rumble Add Nuzlocke Challenge Add PC Access in PokeNav Add Physical Special Split Add Sleep Mode Add Thief Ball Add a EV IV Stat Editor UI Add a debug menu Adding Multi region Support Adding Support for Connectivity with Other Hacks Whilst Maintaining Connectivity with Vanilla Adding Time Based Encounters Adding Walking Animations to All NPCs Adding a New Trainer Class Adding a New Trainer Front Picture Adding a Pokémon Type & Disabling the Mystery Type Adding new event object or overworld sprites All Trees Permanently Get Cut Allow All Pokemon to Evolve Without Trading Allow Both Latios and Latias Appear. 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Share Alternative Option Get Match Calls Only If Caller Wants a Rematch Get Rid of Battery Run Dry Error Message Get Rid of Pokemon Disobeying You Holding Select Allows For A Second Register Item Home How the Game Works How to Support Savefile Backwards Compatibility How to add a new Pokémon species How to add a new ability How to add a new region map How to create a new regular trainer battle How to delete a map Implement Missing Text Function RESET_FONT Implementing Catch EXP Implementing ipatix's High Quality Audio Mixer Implementing the “textcolor” script command from FRLG and give object events their own text colour Improve Partner Battle Code Improve the Loading of Battle Terrain Improving the WaitForVBlank function Increase money limit Infinite TM usage Instead of Asking to Stop learning a New Move, You'll be Asked to Continue Learning Item Automatically Goes to PC if Bag is Full Keep the Camera from Making Waves LGPE Style Bonus Premier Balls Learn moves upon evolution List Menu Text Coloring Make Cleanse Tag Avoid All Wild Encounters and Usable If Held By Anyone in Your Party; Make PokeDoll Do the Same for Trainers Seeing You Make Daycare Faster at Leveling Pokémon Make Key Items That Cannot Be Used In The Field Not Show A Use or Register Option Make L Button Be Turbo A When L=A Option Is Set Make Ledge Jumps Check Collision Make Move Relearner Teach Egg Moves With A Flag Make Multiple Secret Bases Make Norman's Slaking Have Ability Intimidate Make Pokemon Not Heal When Going into PC Make Pokemon that Require a Fateful Encounter to be Legal to Always Be Set to Legal Make space for EWRAM Data for Summary screen Make the Bag Able to Hold 120 Items Instead of 30 Make the Person in the Intro Match the the Save File Map Based Trainer Battle Music Move Item Multipage Options Menu Name Rater Allows Traded Pokemon to be Renamed New Birch's Briefcase With Fully Custom Starters by Archie and Mudskip New Custom Menu Border Themes (Basic) New Main Menu UI With Mugshot by Archie and Mudskip New Options Plus ‐ Multipage Options Menu with Faster Text, HP‐EXP Bar Speeds and Metric Nickname your Pokémon from the party menu Not showing dex entries until getting the Pokédex Omnidirectional Jump Optimization ‐ Remove Expensive and Redundant `BuildColorMaps()` Function Option to Skip Copyright and Intro Overview: Items and their Effects Overview: The Party Menu Overview∶ The Game Loop Overview∶ The Task System Per Shop\Mart Item Prices Plural Giveitem Pokecenters Disregard Eggs Prompt for reusing Repels Push B in wild battle moves to Run Push B to Toggle Running Shoes Pushing B When Asked To Stop Learning Move Will Cancel Teaching The Move Quickly Run from a Battle by Holding Right While the Wild Pokémon's Name Appears Raise Odds of Catching a Pokemon by Pressing B When the Ball Shakes Random Info, Tips, and Tricks Reflections Remove 'Select' Sound From Specific Map Events Remove Warp Fadescreen Remove badge boosts Remove the backup save file Remove the extra save confirmation Remove the functionally redundant move grammar tables Repeated Field Medicine Use Reuse filler save space for Variables and Flags Revert Brendan May Sprites to Ruby Sapphire Set Metatile IDs From Another Map Set Up Item Balls on a Map Without Needing New Scripts Shifting to Pokémon Already in Battle Exits the Shift Menu Shiny Creation With a Flag Shop Items By Badge Count Show IVs EVs in Summary Screen Show Species That You're Switching For in the Party Menu Show Type Effectiveness In Battle Using Pre Existing Function and Disable in Option Menu Show a throbber animation while the game is saving Shuckle makes Berry Juice Something doesn't work I need help etc. Spawn Invisible Player Speedy Nurse Joy Spinda Second Frame Spot Addition Stair Warps Supplementary Scripting Macros Surfing Dismount Ground Effects Temporarily Replace Player or Enemy Party Pokemon The Basics of Scripting Toggle Trainer Sight Trainer Backsprite Editing Trainer Class Based Poké Balls Trainer Scripts Trainers No Longer Spin to Face You Right As You Pass Them Trigger Map Scripts By Flag Triple layer metatiles Tutorials Tweaking the count of health beeps Uniquely Shuffle Array Update Sitrus Berry's effect to Gen 4 standard Use HMs Without Any Pokemon in your Party Knowing Them Useful Modding Tools Useful Scripting Specials Why You Should (Almost) Always Be Using 32‐Bit Variables in Your Code Why should I use this over binary hacking
1 How to delete a map
GriffinR edited this page 2023-02-01 13:40:11 -05:00
Table of Contents

This article describes the required steps to delete a map from your project. As of writing this is not possible via Porymap (and that's unlikely to change), so you'll need to do it yourself. As an example, we'll delete the map AncientTomb.

Before beginning, ensure you actually want to delete all the data for this map from your project. If your end goal is simply to remove the map from your game, you can save time by just making it inaccessible (delete any warps or connections to the map). If you'd definitely like to remove it from your project entirely, continue below.

1. Delete the map data folder

This is the folder in data/maps/ that contains our map's header data, events, and scripts. Before deleting it, you may wish to examine your map's map.json to make a note of its id and layout constants for later. For our example we delete the folder data/maps/AncientTomb, and we've noted our constants are MAP_ANCIENT_TOMB and LAYOUT_ANCIENT_TOMB.

2. Delete the map group entry

Every map has an entry in data/maps/map_groups.json to let the game know what group it belongs to and how to generate data for it. We need to remove the entry for our map.

NOTE: The last entry in each map group list must not end with a comma.

  "gMapGroup_Dungeons": [
    ...
    "IslandCave",
-    "AncientTomb",
    "Underwater_Route134",
    ...

3. Delete the layout data

A "layout" is what contains the map blocks and border metatiles for each map. Some of these are shared by multiple maps (for example, every Pokémon Center has the same layout). If another map uses the same layout, then it will have the same layout constant (LAYOUT_ANCIENT_TOMB in our example) in its data/maps/<mapname>/map.json file. If you're deleting a map that shares a layout with another map that you're not deleting, then skip this step.

AncientTomb's layout LAYOUT_ANCIENT_TOMB is unique to the map we're deleting, so we can delete the layout data. We delete the folder data/layouts/AncientTomb, then we go to data/layouts/layouts.json and delete its layout entry:

    ...
    },
-   {
-     "id": "LAYOUT_ANCIENT_TOMB",
-     "name": "AncientTomb_Layout",
-     "width": 17,
-     "height": 33,
-     "primary_tileset": "gTileset_General",
-     "secondary_tileset": "gTileset_Cave",
-     "border_filepath": "data/layouts/AncientTomb/border.bin",
-     "blockdata_filepath": "data/layouts/AncientTomb/map.bin"
-   },
    {
    ...

4. Stop including the scripts file

We deleted (among other things) our map's scripts.inc file in step 1. We need to tell the game it doesn't exist anymore. In data/event_scripts.s, remove the .include for your map's scripts file (if it's a new map you added with Porymap, it will be near the bottom of the file).

NOTE: If any of your map's scripts happened to be referenced in another file, those references will also need to be removed.

        ...
   	.include "data/maps/IslandCave/scripts.inc"
-	.include "data/maps/AncientTomb/scripts.inc"
	.include "data/maps/Underwater_Route134/scripts.inc"
        ...

5. Remove map constant usage

The map constant (MAP_ANCIENT_TOMB) for our deleted map will become invalid. If we did step 3, so will its layout constant (LAYOUT_ANCIENT_TOMB). We need to remove any uses of these constants throughout our repo. Examples of places they might be used include warps/connections from other maps, as an argument to a script command, or in a map number/group macro in C (e.g. MAP_NUM(ANCIENT_TOMB)). This step is largely the reason Porymap is unable to delete maps for us.

You can either search for these yourself (e.g. git grep "ANCIENT_TOMB"), or let the compiler errors when you try to build find them for you. The former is preferable to avoid confusion, but in case you do the latter some example errors are listed below, along with how the usage might be removed. The exact changes will depend on the map you're deleting, and what you want the new behavior to be.

Error:

src/braille_puzzles.c: In function `ShouldDoBrailleRegisteelEffect':
src/braille_puzzles.c:221: `MAP_ANCIENT_TOMB' undeclared (first use in this function)

Fix (in src/braille_puzzles.c):

bool8 ShouldDoBrailleRegisteelEffect(void)
{
-   if (!FlagGet(FLAG_SYS_REGISTEEL_PUZZLE_COMPLETED) && (gSaveBlock1Ptr->location.mapGroup == MAP_GROUP(ANCIENT_TOMB) && gSaveBlock1Ptr->location.mapNum == MAP_NUM(ANCIENT_TOMB)))
-   {
-       if (gSaveBlock1Ptr->pos.x == 8 && gSaveBlock1Ptr->pos.y == 25)
-       {
-           sIsRegisteelPuzzle = TRUE;
-           return TRUE;
-       }
-   }
    return FALSE;
}

Error:

data/maps/Route120/events.inc: Assembler messages:
data/maps/Route120/events.inc:52: Error: invalid operands (*UND* and *ABS* sections) for `&'
data/maps/Route120/events.inc:52: Error: invalid operands (*UND* and *ABS* sections) for `>>'

Fix (in data/maps/Route120/map.json):

  "warp_events": [
-   {
-     "x": 7,
-     "y": 55,
-     "elevation": 0,
-     "dest_map": "MAP_ANCIENT_TOMB",
-     "dest_warp_id": "0"
-   },
    {

6. Additional data?

There may be other things associated with your old map you'd also like to delete. There may be now-unused tilesets, or location data (see MAPSEC_ANCIENT_TOMB for our example), or some map-specific code (like the now-pointless Ancient Tomb puzzle), but changing/deleting all of that is up to you.

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