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diff --git a/Change-Time-Based-Evolution-Times.md b/Change-Time-Based-Evolution-Times.md new file mode 100644 index 0000000..241dc03 --- /dev/null +++ b/Change-Time-Based-Evolution-Times.md @@ -0,0 +1,21 @@ +For whatever reason, Game Freak decided that day time in Ruby, Sapphire and Emerald should be from 12:00 p.m. to 11:59 p.m. (and night time should be 12:00 a.m. to 11:59 a.m.). As there's no day/night cycle in these games, this only really affected Eevee's evolution into Espeon or Umbreon. + +This tutorial will explain how to change these to more sensible values, as seen in most other Pokémon games. + +First, open up [include/pokemon.h](../blob/master/include/pokemon.h) and define two new constants: + +``` +#define DAY_START 4 +#define NIGHT_START 18 +``` +These values will be used to determine what time day and night start in your game; note that they're in 24 hour time. Feel free to customize them. + +Next, open up [src/pokemon.c](../blob/master/src/pokemon.c) and replace all instances of the following code: +* Replace `gLocalTime.hours >= 12 && gLocalTime.hours < 24` with `gLocalTime.hours >= DAY_START && gLocalTime.hours < NIGHT_START` +* Replace `gLocalTime.hours >= 0 && gLocalTime.hours < 12` with `(gLocalTime.hours >= NIGHT_START || gLocalTime.hours < DAY_START)` + +If you're using Dizzy Egg's repos in your project you may have a few instances of these, but otherwise there's only one of each. + +Lastly, if you've chosen different day/night start times, you should double check that the AND and OR conditions above still make sense. + +For example: if you did `#define DAY_START 12` and `#define NIGHT_START 0`, you'd have `gLocalTime.hours >= 12 && gLocalTime.hours < 0`, which won't work as `gLocalTime.hours` can't be greater than 12 and less than 0 at the same time.
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