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docs+godot: finish frame-cadence RE notes + headless shot null-guard

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Prior-session WIP: RE findings on the engine frame cadence (engine-re.md,
phase-a-slice-plan.md, tools-reference.md) and a null-guard so headless
--shot-sequence advances without a rendered viewport texture.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
gamer147
2026-07-08 17:26:27 -04:00
parent 37fbbd278d
commit 1f9bde3739
4 changed files with 116 additions and 2 deletions
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6
godot/Main.cs
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@@ -162,8 +162,10 @@ public partial class Main : Godot.Control
if (_seqDir != null && _seqIdx < _seqFrames && !_done)
{
System.IO.Directory.CreateDirectory(_seqDir);
var fimg = GetViewport().GetTexture().GetImage();
fimg.SavePng($"{_seqDir}/frame_{_seqIdx:0000}.png");
// Headless has no rendered viewport texture (GetImage() is null). Still advance/count/quit so the
// real-run trace-histogram can profile the live path without a display; only the PNG grab is skipped.
var fimg = GetViewport().GetTexture()?.GetImage();
fimg?.SavePng($"{_seqDir}/frame_{_seqIdx:0000}.png");
_seqIdx++;
if (_seqIdx >= _seqFrames) { GD.Print($"SEQ saved {_seqIdx} frames -> {_seqDir}"); GetTree().Quit(0); }
return;