Adding "fluent" methods to modify color channels. (bevyengine#12099)

Fixes bevyengine#12075

crates/bevy_color/src/hsla.rs

@@ -47,6 +47,21 @@ impl Hsla {
     pub const fn hsl(hue: f32, saturation: f32, lightness: f32) -> Self {
         Self::new(hue, saturation, lightness, 1.0)
     }
+
+    /// Return a copy of this color with the hue channel set to the given value.
+    pub const fn with_hue(self, hue: f32) -> Self {
+        Self { hue, ..self }
+    }
+
+    /// Return a copy of this color with the saturation channel set to the given value.
+    pub const fn with_saturation(self, saturation: f32) -> Self {
+        Self { saturation, ..self }
+    }
+
+    /// Return a copy of this color with the lightness channel set to the given value.
+    pub const fn with_lightness(self, lightness: f32) -> Self {
+        Self { lightness, ..self }
+    }
 }
 
 impl Default for Hsla {

crates/bevy_color/src/lcha.rs

@@ -52,6 +52,21 @@ impl Lcha {
             alpha: 1.0,
         }
     }
+
+    /// Return a copy of this color with the hue channel set to the given value.
+    pub const fn with_hue(self, hue: f32) -> Self {
+        Self { hue, ..self }
+    }
+
+    /// Return a copy of this color with the chroma channel set to the given value.
+    pub const fn with_chroma(self, chroma: f32) -> Self {
+        Self { chroma, ..self }
+    }
+
+    /// Return a copy of this color with the lightness channel set to the given value.
+    pub const fn with_lightness(self, lightness: f32) -> Self {
+        Self { lightness, ..self }
+    }
 }
 
 impl Default for Lcha {

crates/bevy_color/src/linear_rgba.rs

@@ -50,6 +50,21 @@ impl LinearRgba {
         }
     }
 
+    /// Return a copy of this color with the red channel set to the given value.
+    pub const fn with_red(self, red: f32) -> Self {
+        Self { red, ..self }
+    }
+
+    /// Return a copy of this color with the green channel set to the given value.
+    pub const fn with_green(self, green: f32) -> Self {
+        Self { green, ..self }
+    }
+
+    /// Return a copy of this color with the blue channel set to the given value.
+    pub const fn with_blue(self, blue: f32) -> Self {
+        Self { blue, ..self }
+    }
+
     /// Make the color lighter or darker by some amount
     fn adjust_lightness(&mut self, amount: f32) {
         let luminance = self.luminance();

crates/bevy_color/src/oklaba.rs

@@ -50,6 +50,21 @@ impl Oklaba {
             alpha: 1.0,
         }
     }
+
+    /// Return a copy of this color with the 'l' channel set to the given value.
+    pub const fn with_l(self, l: f32) -> Self {
+        Self { l, ..self }
+    }
+
+    /// Return a copy of this color with the 'a' channel set to the given value.
+    pub const fn with_a(self, a: f32) -> Self {
+        Self { a, ..self }
+    }
+
+    /// Return a copy of this color with the 'b' channel set to the given value.
+    pub const fn with_b(self, b: f32) -> Self {
+        Self { b, ..self }
+    }
 }
 
 impl Default for Oklaba {

crates/bevy_color/src/srgba.rs

@@ -67,6 +67,21 @@ impl Srgba {
         }
     }
 
+    /// Return a copy of this color with the red channel set to the given value.
+    pub const fn with_red(self, red: f32) -> Self {
+        Self { red, ..self }
+    }
+
+    /// Return a copy of this color with the green channel set to the given value.
+    pub const fn with_green(self, green: f32) -> Self {
+        Self { green, ..self }
+    }
+
+    /// Return a copy of this color with the blue channel set to the given value.
+    pub const fn with_blue(self, blue: f32) -> Self {
+        Self { blue, ..self }
+    }
+
     /// New `Srgba` from a CSS-style hexadecimal string.
     ///
     /// # Examples

crates/bevy_color/src/xyza.rs

@@ -39,14 +39,29 @@ impl Xyza {
     /// * `x` - x-axis. [0.0, 1.0]
     /// * `y` - y-axis. [0.0, 1.0]
     /// * `z` - z-axis. [0.0, 1.0]
-    pub const fn rgb(x: f32, y: f32, z: f32) -> Self {
+    pub const fn xyz(x: f32, y: f32, z: f32) -> Self {
         Self {
             x,
             y,
             z,
             alpha: 1.0,
         }
     }
+
+    /// Return a copy of this color with the 'x' channel set to the given value.
+    pub const fn with_x(self, x: f32) -> Self {
+        Self { x, ..self }
+    }
+
+    /// Return a copy of this color with the 'y' channel set to the given value.
+    pub const fn with_y(self, y: f32) -> Self {
+        Self { y, ..self }
+    }
+
+    /// Return a copy of this color with the 'z' channel set to the given value.
+    pub const fn with_z(self, z: f32) -> Self {
+        Self { z, ..self }
+    }
 }
 
 impl Default for Xyza {