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docs: withdraw the target_fps claim for sports_scroll; fix the Vegas speed formula

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- SPORTS_UNIFICATION.md still presented honouring global target_fps as
  sports_scroll's added behaviour and its one user-visible gain; note that
  it was withdrawn because it had become a speed multiplier.
- ADVANCED_FEATURES.md gave Vegas scrolling as
  (scroll_speed / target_fps) * elapsed; the real rule is scroll_speed px/s
  by elapsed time, through a 0.1-5 px per scroll_delay clamp when
  frame_based_scrolling is on.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-09-17 09:01:52 -04:00
co-authored by Claude Opus 5
parent d7d73935cf
commit 25b0b1b532
2 changed files with 18 additions and 5 deletions
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docs/ADVANCED_FEATURES.md
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@@ -433,10 +433,14 @@ Vegas mode consists of four core components working together to provide smooth 1
- **Frame Rate Control:** Precise timing to maintain 125 FPS
- **Pre-rendered Content:** Plugins pre-render during update()
**Scroll Speed Calculation:**
**Scroll Speed Calculation:** motion is by elapsed time; `target_fps` paces
the render loop, not the speed.
```python
pixels_per_frame = (scroll_speed / target_fps)
scroll_position += pixels_per_frame * elapsed_time
# frame_based_scrolling: false
scroll_position += scroll_speed * elapsed_time # scroll_speed in px/s
# frame_based_scrolling: true (the default) -- not stepping, just a clamp
applied = clamp(scroll_speed * scroll_delay, 0.1, 5) / scroll_delay
scroll_position += applied * elapsed_time
```
#### Component Interactions