Week 80: A start on meteor-blocking barriers

Starting to work on barriers!

tl;dr: Last week I started working on meteor-blocking barriers.

What happened last week?

Highlights

• This was another short week for me.
• And I spent a lot more time trying and failing to diagnose the cause of a BSOD error I am seeing.
• This has nothing to do with my games, but is really affecting my productivity!
• I started working on barriers; these will be able to block incoming meteors.

Laundry list

• Particle effects:
• Create new explosion particle effects for stations and bots.
• Create a new particle effect for barriers.
• Update particle effects for meteor explosions and power-line sparks.
• Hook-up bot and station explosions.
• Update meteor explosions and power-line sparks for new art.
• Barriers:
• Create barrier-pylon art.
• Start adding barrier-pylon logic.
• Miscellaneous:
• Re-arrange meteor logic into a new subdirectory.
• Fix an oversight from a recent edge-trajectory validation fix.
• Cancel active-commands-when-finished and queued-commands-when-started if there isn't enough energy for the command.
• Fix character position centering.
• At some point, I somehow updated character positions to be based on their bottom center.
• But all of my logic assumes that `position` will actually correspond to the center of the character.

What's next?

• Finish adding the barrier-bot barrier-building mechanic.
• Add better support for configuring where and when meteors spawn.

🎉 Cheers!