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Add: [NewGRF] Map seed as global variable.

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This is useful to provide a feature-agnostic, stable random value that differs between games.
One of the possible uses is to e.g. use it to create pseudo-random regions for towns or industries.
This commit is contained in:
Michael Lutz 2022-03-13 11:21:40 +01:00
parent 68ec2a7877
commit 08a5478a93
2 changed files with 6 additions and 1 deletions
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3
src/genworld.cpp
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@ -93,7 +93,6 @@ static void _GenerateWorld()
_generating_world = true;
if (_network_dedicated) Debug(net, 3, "Generating map, please wait...");
/* Set the Random() seed to generation_seed so we produce the same map with the same seed */
if (_settings_game.game_creation.generation_seed == GENERATE_NEW_SEED) _settings_game.game_creation.generation_seed = _settings_newgame.game_creation.generation_seed = InteractiveRandom();
_random.SetSeed(_settings_game.game_creation.generation_seed);
SetGeneratingWorldProgress(GWP_MAP_INIT, 2);
SetObjectToPlace(SPR_CURSOR_ZZZ, PAL_NONE, HT_NONE, WC_MAIN_WINDOW, 0);
@ -302,6 +301,8 @@ void GenerateWorld(GenWorldMode mode, uint size_x, uint size_y, bool reset_setti
_settings_game.construction.map_height_limit = std::max(MAP_HEIGHT_LIMIT_AUTO_MINIMUM, std::min(MAX_MAP_HEIGHT_LIMIT, estimated_height + MAP_HEIGHT_LIMIT_AUTO_CEILING_ROOM));
}
if (_settings_game.game_creation.generation_seed == GENERATE_NEW_SEED) _settings_game.game_creation.generation_seed = _settings_newgame.game_creation.generation_seed = InteractiveRandom();
/* Load the right landscape stuff, and the NewGRFs! */
GfxLoadSprites();
LoadStringWidthTable();

4
src/newgrf.cpp
View File

@ -7046,6 +7046,10 @@ static uint32 GetPatchVariable(uint8 param)
case 0x16:
return SPR_SHORE_BASE;
/* Game map seed */
case 0x17:
return _settings_game.game_creation.generation_seed;
default:
grfmsg(2, "ParamSet: Unknown Patch variable 0x%02X.", param);
return 0;