feat(tunnel-vision): add survivor tunnel vision effect - #178
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Minecraft 26.2 has no way to switch a post-processing shader on for a single player, so the narrowing view is delivered as a camera_overlay rendered onto a head-slot item instead. The renderer drives 32 stages with hysteresis so the overlay does not flicker between adjacent stages, and layers a heartbeat pulse on top once stamina runs low. FoodBar gains a remainingShare() getter so the tunnel vision service can read a survivor's stamina without coupling to the experience-bar display detail. /tunnelvision lets a designer freeze a stage or run the heartbeat from the lobby to judge the resource pack's glyph sizes without starting a round. The vignette textures themselves ship separately in cygnus-pack; the overlay stays off wherever OverlayProperties reports the pack is not delivered, since without it survivors would stare at an empty box.
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Summary
Adds the survivor tunnel vision effect: as a survivor's stamina drains, their field of
view narrows, driven by 32 discrete stages with hysteresis (so the overlay doesn't
flicker between adjacent stages) plus a heartbeat pulse layered on top once stamina
runs critically low.
Minecraft 26.2 has no way to switch a post-processing shader on for a single player, so
the effect is delivered as a
camera_overlayrendered onto a head-slot item instead of ashader. The vignette textures that make the overlay look correct ship separately in
cygnus-pack; this branch only wires up the rendering logic and stays off whereverOverlayPropertiesreports the pack was not delivered, since without it survivors wouldotherwise stare at an empty box.
/tunnelvisionlets a designer freeze a single stage or run the heartbeat preview fromthe lobby, so glyph sizes and pulse timing in the resource pack can be judged without
starting a round.
Stack
This PR is based on #177 (
refactor/overlay-foundation) and targets that branch, notmain. It carries only the tunnel vision slice of the original mixedfeat/tunnel-visionbranch — blood splatter and the slender gaze effect are split into sibling PRs.
Important:
Cygnus.javawires all three effects (tunnel vision, blood, gaze) into thesame constructor and
initListener()guard, so this PR conflicts with the sibling bloodand gaze PRs at that file. Whichever of the three merges second will need a rebase to
reconcile the wiring.
Test plan
./gradlew testpasses fully (no pre-existing failures carried over from the mixedbranch — the two failing SlenderVisibility tests were never part of this feature)