44r0n7andClaude Opus 5.5
b4245871ae
Also: board rule to write tasks from chat in our own words, task descriptions rewritten that way, and a note on lost web-board descriptions. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
38 lines
1.9 KiB
Markdown
38 lines
1.9 KiB
Markdown
# Fog of war
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Unexplored ground is black with a soft edge. The sky and the first few grains of the
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surface start seen. Exploration never changes the simulation.
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## Data and revealing
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`src/sim/fog.js` keeps a `Uint8Array` at half the grain resolution (`FOG = 2`).
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Values run from 0 (unseen) to 255 (seen) and only increase. `alloc` allocates it with
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the other world arrays. `fogInit` reveals above `surfY` and fades eight grains below it.
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Every four ticks, 256 rays from the bot's centre reveal up to 48 grains. The last eight
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grains fade out. Solid and powder stop sight after a four-grain fade into their face;
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air, gas and liquid pass sight. Bars and machine voids do not block it.
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Each look also senses the ground around the bot through rock: every fog cell within
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`FOG_SENSE` (20 grains) of the bot is revealed, fully clear out to 16 grains and fading to
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nothing at 20, so the player can see ore and caves next to their tunnel and choose where to dig.
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## Saving
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The fog buffer is saved and exported with the other typed arrays, without a save version
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change. Older saves rebuild the surface, reveal a radius of 12 grains around built blocks,
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machine footprints and molds, then look from the bot. Loading and generating also look
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immediately from the bot.
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## Drawing and setting
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Both looks and the thermal lens sample fog bilinearly. Seen grains use the usual drawing;
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unseen grains use the out-of-world colour and smooth-look buffers, hiding their shapes.
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Partial values dim foreground, background and trees. Bloom sources need at least 128;
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bars, flyers, rain and particles need at least 64. Hover info and the cursor label say
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only “Unexplored” below 64.
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Game settings → Fog of war is on by default. Turning it off shows the whole world while
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exploration continues to be recorded and saved. Browser scenes and performance tools turn
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it off in their shared setup; dedicated fog checks enable it explicitly.
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