aleleba/effectcraft
1
0
Fork 0
mirror of https://github.com/storytold/effectcraft.git synced 2026-10-30 21:16:52 -06:00
Code Issues Packages Projects Releases Wiki Activity

Text animators: Tracking Amount in pixels, Subtract selectors stop at 0, as After Effects

Browse Source 
A text animator's Tracking Amount is in pixels in After Effects 2026, not in
1/1000 em like the Character panel's tracking: Amount 30 on every character
adds 30 px between neighbours (half before, half after each) at 80 px and at
40 px. And a Subtract range selector over characters the first selector
leaves out keeps them at 0 instead of selecting them negatively. With both,
the EXPORTER's t8 layer D (Tracking 30 on characters 2-4 by index, Subtract
over the last 20 %) puts every glyph where AE does (it ended 88 px short,
1553 vs 1641; now 1641).

The "Tracking In" text preset animates 40 -> 0 px (was 400 -> 0 thousandths
of an em, about the same at 100 px text); Lottie export writes a style run's
tracking (1/1000 em) as pixels for its tracking animator, which Lottie
players add in pixels.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
vangel76
2026-10-19 16:41:15 +02:00
co-authored by Claude Opus 5.5
parent 83b134cdc8
commit 8ea876914d
6 changed files with 55 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
crates/render/src/text.rs
+5 -3
View File
@@ -639,10 +639,12 @@ pub fn text_geom(ctx: &EvalCtx, layer: &Layer) -> Option<TextGeom> {
let (mut la, mut la_k) = (50.0 * f64::from(align_index(justify)), 0.0);
for gi in li_start..li_end {
let x = &xfs[gi];
let em = lay.styles.get(lay.glyphs[gi].run).map_or(doc.size, |s| s.size) / 1000.0;
pen += x.track_before * em;
// An animator's Tracking Amount is in pixels, whatever the font size (After Effects
// 2026: Amount 30 adds 30 px between selected characters at 80 px and at 40 px), unlike
// the Character panel's tracking in 1/1000 em.
pen += x.track_before;
shift[gi] = pen;
pen += x.track_after * em + vadv[gi];
pen += x.track_after + vadv[gi];
if x.line_anchor_k > la_k {
la = x.line_anchor;
la_k = x.line_anchor_k;