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Add a "Cyclic" gradient option that closes the ramp into a seamless loop (#4416)

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* Add a Cyclic gradient attribute that wraps the stop list through the 1|0 boundary back to the first stop

* Show the wrap segment's midpoint diamond in the color picker spectrum strip when cyclic

* Keep the wrap midpoint diamond tracking the pointer by a wrapped strip width when dragged past the ends

* Give the Gradient tool's viewport overlay the same cyclic wrap midpoint diamond and drag behavior

* Correct the docs claiming the final stop's midpoint is always ignored now that cyclic uses it

* Move the gradient cyclic toggle onto the Ends row as a Link icon checkbox

* Update labels

* Register GradientHueDirection with the Data panel so its attribute column renders

* Reword wrap segment to wrapped interval and stray segment usages to interval

* Clean up comments

* Fix the color picker write-back losing default position elision and the blend path guessing the cyclic flag
This commit is contained in:
Keavon Chambers
2026-08-06 18:52:00 -07:00
committed by Dennis Kobert
parent a35143586a
commit 244a7e0f78
23 changed files with 868 additions and 251 deletions
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29
node-graph/nodes/vector/src/vector_nodes.rs
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@@ -47,6 +47,7 @@ use vector_types::vector::{PointDomain, RegionDomain};
/// randomized draws up to it.
fn assign_color_at(
gradient: &Gradient,
gradient_cyclic: bool,
gradient_space: vector_types::GradientSpace,
gradient_hue_direction: vector_types::GradientHueDirection,
position: usize,
@@ -70,7 +71,7 @@ fn assign_color_at(
_ => position as f64 % repeat_every as f64 / (repeat_every - 1) as f64,
},
};
gradient.evaluate(factor, Default::default(), gradient_space, gradient_hue_direction)
gradient.evaluate(factor, Default::default(), gradient_cyclic, gradient_space, gradient_hue_direction)
}
/// Uniquely sets the fill and/or stroke style of every vector element to individual colors sampled along a chosen gradient.
@@ -113,6 +114,7 @@ fn assign_colors<'e>(
if gradient.is_empty() {
return Ok((content.lane(lane).map_element(element), Attr(existing_fill), Attr(existing_stroke)));
}
let gradient_cyclic = gradient.lane(0).attr::<vector_types::markers::GradientCyclic>();
let gradient_space = gradient.lane(0).attr::<vector_types::markers::GradientSpace>();
let gradient_hue_direction = gradient.lane(0).attr::<vector_types::markers::GradientHueDirection>();
let gradient_element = gradient.element_ref(0);
@@ -125,7 +127,17 @@ fn assign_colors<'e>(
false => gradient_element,
};
let color = assign_color_at(gradient_element, gradient_space, gradient_hue_direction, lane, content.len(), randomize, seed, repeat_every);
let color = assign_color_at(
gradient_element,
gradient_cyclic,
gradient_space,
gradient_hue_direction,
lane,
content.len(),
randomize,
seed,
repeat_every,
);
let paint = List::new_from_element(color).into_graphic_list();
let parked = park_paint(ctx.arena(), paint)?;
@@ -183,6 +195,7 @@ fn assign_colors_graphic<'e>(
if gradient.is_empty() {
return Ok(content.lane(lane).map_element(original.clone()));
}
let gradient_cyclic = gradient.lane(0).attr::<vector_types::markers::GradientCyclic>();
let gradient_space = gradient.lane(0).attr::<vector_types::markers::GradientSpace>();
let gradient_hue_direction = gradient.lane(0).attr::<vector_types::markers::GradientHueDirection>();
let gradient_element = gradient.element_ref(0);
@@ -230,7 +243,17 @@ fn assign_colors_graphic<'e>(
Some(mut rows) => {
for row in 0..rows.len() {
let has_stroke = rows.element(row).is_some_and(|vector| vector.stroke.is_some());
let color = assign_color_at(gradient_element, gradient_space, gradient_hue_direction, position + row, length, randomize, seed, repeat_every);
let color = assign_color_at(
gradient_element,
gradient_cyclic,
gradient_space,
gradient_hue_direction,
position + row,
length,
randomize,
seed,
repeat_every,
);
let paint = List::new_from_element(color).into_graphic_list();
if fill {
set_paint_attribute_at(&mut rows, row, ATTR_FILL, paint.clone());