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Set Transparent Color: map the click through the picture's 3-D camera and find grouped pictures that keep no box of their own

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Marco Arnulfo
2026-10-23 19:16:09 +02:00
parent de18659978
commit b7ea777be7
3 changed files with 89 additions and 11 deletions
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crates/render/src/lib.rs
+11 -9
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@@ -600,6 +600,16 @@ pub fn parse_path(d: &str) -> BezPath {
bp
}
/// The transform a 3-D camera applies to shape `s` of size `w` x `h` (approximated by the affine
/// map that fits it best), as drawn; `None` for no camera, and for groups, tables and charts.
pub fn camera_turn(rctx: &Ctx, s: &Shape, w: f64, h: f64) -> Option<Affine> {
if matches!(s.kind, ShapeKind::Group { .. } | ShapeKind::Table(_) | ShapeKind::Chart(_)) {
return None;
}
let (e, _) = resolve::effects(rctx, s);
e.as_ref().and_then(|e| e.raw3d.as_deref()).and_then(camera::from_raw).and_then(|c| camera::affine(&c, w, h))
}
/// The rectangle a picture's image occupies given its crop (fractions; negative = padding).
pub fn crop_dest(bounds: Rect, crop: [f64; 4]) -> Rect {
let [l, t, r, b] = crop.map(|v| if v.is_finite() { v.clamp(-10.0, 0.99) } else { 0.0 });
@@ -873,15 +883,7 @@ impl Renderer {
* Affine::translate(-c.to_vec2());
m = parent * Affine::translate(st.offset) * x.affine() * around;
}
// A 3-D camera turns the shape (approximated by the affine transform that fits it best).
if !matches!(s.kind, ShapeKind::Group { .. } | ShapeKind::Table(_) | ShapeKind::Chart(_))
&& let Some(a) = resolve::effects(rctx, s)
.0
.as_ref()
.and_then(|e| e.raw3d.as_deref())
.and_then(camera::from_raw)
.and_then(|c| camera::affine(&c, x.w, x.h))
{
if let Some(a) = camera_turn(rctx, s, x.w, x.h) {
m *= a;
}
let layered = st.opacity < 0.999 || st.clip.is_some();