Refactor weather switching (fixes #541)

Purges precip by default, only keeps it loaded if we're actually swapping to a rain/snow type weather.

Reduces the amount of thinkers in CEZ2 by over 20,000.

Test exe 7/22/2021: srb2rain.exe

added 1 commit

• be28505d - stupid whitespaces

Compare with previous version

added 1 commit

• cf487132 - make blank precip spawning not hacky

Compare with previous version

changed the description

Updated to replace the weird hack that was used for blank precip spawning. Much more natural to just handle it during rain spawning instead of calling P_SwitchWeather and doing everything twice.

added 1 commit

• aa8baac8 - kill whitespace

Compare with previous version

changed milestone to %2.2.10

added 301 commits

• aa8baac8...6d76d05d - 299 commits from branch STJr:next
• 73e7475a - Merge branch 'next' of https://git.do.srb2.org/STJr/SRB2 into sunbehindcloud
• 8fce8f66 - Merge branch 'sunbehindcloud' of https://git.do.srb2.org/katsy/SRB2 into sunbehindcloud

Compare with previous version

changed the description

approved this merge request

approved this merge request

merged

mentioned in commit 2eed4a92