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Add the "Perceptual" and "Classic" families of gradient spaces with OkLab as the new default (#4415)

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* Add an OkLab gradient interpolation space and make it the new default

* Fix the Properties panel fill row resetting the gradient interpolation space to the default

* Add OkLch, Lab, LCh, and HSL gradient interpolation spaces

* Add a hue direction attribute and picker choice for polar gradient interpolation spaces

* Add an HSV gradient interpolation space

* Rename the sRGB Linear and sRGB Gamma gradient spaces to RGB Linear and RGB Gamma

* Divide the gradient interpolation dropdown between absolute and relative color spaces

* Rename the OkLch gradient interpolation space to OkLCh for channel-notation capitalization

* Shorten the color picker popover's hue direction row label to Arc

* Call the Gradient Interpolation node's parameter Space and extend the picker tooltip title to match

* Rename the gradient interpolation attribute and type family to gradient space

* Rename the gradient tool's gradient space transform to gradient to viewport transform

* Add serde aliases and a node replacement covering the gradient space renames

* Give the gradient space choices artist-facing labels and reorder the dropdown sections

* Add a Gradient Hue Direction node and its attribute read node

* Say interpolate instead of blend for gradient stop color traversal in docs and tooltips

* Label the polar perceptual gradient spaces as Perceptual Hue and group the dropdown sections by geometry

* Add a migration alias covering the gradient space attribute reader rename

* Carry the gradient hue direction attribute through boolean operations

* Register GradientHueDirection wire types in the node registry
This commit is contained in:
Keavon Chambers
2026-08-06 02:40:25 -07:00
committed by GitHub
parent 3f082c881f
commit 461ddbc872
31 changed files with 826 additions and 360 deletions
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21
node-graph/nodes/math/src/lib.rs
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@@ -1393,11 +1393,19 @@ fn gradient_spread(_: impl Ctx, gradient: Item<Gradient>, gradient_spread: Item<
gradient
}
/// Sets the color space each gradient in the input list blends between its stops with: linear light or gamma-encoded sRGB.
/// Sets the color space in which each gradient in the input list interpolates between its stops.
#[node_macro::node(category("Gradient"))]
fn gradient_interpolation(_: impl Ctx, gradient: Item<Gradient>, gradient_interpolation: Item<vector_types::GradientInterpolation>) -> Item<Gradient> {
fn gradient_space(_: impl Ctx, gradient: Item<Gradient>, space: Item<vector_types::GradientSpace>) -> Item<Gradient> {
let mut gradient = gradient;
gradient.set_attribute(core_types::ATTR_GRADIENT_INTERPOLATION, *gradient_interpolation.element());
gradient.set_attribute(core_types::ATTR_GRADIENT_SPACE, *space.element());
gradient
}
/// Sets which way around the hue wheel each gradient in the input list interpolates, for polar color spaces.
#[node_macro::node(category("Gradient"))]
fn gradient_hue_direction(_: impl Ctx, gradient: Item<Gradient>, hue_direction: Item<vector_types::GradientHueDirection>) -> Item<Gradient> {
let mut gradient = gradient;
gradient.set_attribute(core_types::ATTR_GRADIENT_HUE_DIRECTION, *hue_direction.element());
gradient
}
@@ -1425,12 +1433,13 @@ fn gradient_midpoints(_: impl Ctx, gradient: Item<Gradient>, midpoints: List<f64
gradient
}
/// Evaluates the color at the specified position along the gradient, given a position from 0 (left) to 1 (right). Positions beyond that range follow the gradient's `gradient_spread` attribute: Pad (default), Reflect, Repeat, or Clear. Colors between stops blend in the gradient's `gradient_interpolation` color space.
/// Evaluates the color at the specified position along the gradient, given a position from 0 (left) to 1 (right). Positions beyond that range follow the gradient's `gradient_spread` attribute: Pad (default), Reflect, Repeat, or Clear. Colors between stops interpolate in the gradient's `gradient_space` color space.
#[node_macro::node(category("Color"))]
fn sample_gradient(_: impl Ctx, _primary: (), #[default(Color::BLACK, Color::WHITE)] gradient: Item<Gradient>, position: Item<Fraction>) -> Item<Color> {
let gradient_spread = gradient.attribute_cloned_or_default::<vector_types::GradientSpread>(core_types::ATTR_GRADIENT_SPREAD);
let gradient_interpolation = gradient.attribute_cloned_or_default::<vector_types::GradientInterpolation>(core_types::ATTR_GRADIENT_INTERPOLATION);
let color = gradient.element().evaluate(*position.element(), gradient_spread, gradient_interpolation);
let gradient_space = gradient.attribute_cloned_or_default::<vector_types::GradientSpace>(core_types::ATTR_GRADIENT_SPACE);
let gradient_hue_direction = gradient.attribute_cloned_or_default::<vector_types::GradientHueDirection>(core_types::ATTR_GRADIENT_HUE_DIRECTION);
let color = gradient.element().evaluate(*position.element(), gradient_spread, gradient_space, gradient_hue_direction);
Item::new_from_element(color)
}