Editing Openai/694f5245-1110-800b-b182-7c2accd50046 (section)

==== : ====

<syntaxhighlight lang="text">MICRO PATCH / Prevent black screen: on-screen error overlay + safe loop

Do NOT change gameplay rules, map generation, UI, weapons, or room system.
Only add guardrails so canvas never goes fully blank without diagnostics.

1) Global error capture (show on screen)
* Add window.onerror and unhandledrejection handlers.
* Store lastError string and render it in top-right overlay (red text).

2) Wrap game loop in try/catch
* In requestAnimationFrame loop:
  try { update(dt); draw(); }
  catch(e) { lastError = e.stack || String(e); /'' keep drawing overlay ''/ }

3) Render health-check HUD (always visible)
* Show:
* canvas width/height
* playerWorld x,y
* cam x,y
* if any is NaN/Infinity, show "COORD ERROR" and auto-reset:
    playerWorld = {x:0,y:0}; cam={x:0,y:0};

4) Ensure canvas is cleared + background drawn every frame
* At start of draw():
  ctx.clearRect(0,0,w,h);
  ctx.fillRect(0,0,w,h) with a dark background so we can see it’s drawing.

Acceptance:
* Even if something crashes, screen shows an error message (not empty black).
* Canvas HUD shows non-zero size and non-NaN coords.
* At minimum, a dark background + HUD appears every frame.

</syntaxhighlight>