Trait bevy_tweening::lens::Lens
source · pub trait Lens<T> {
// Required method
fn lerp(&mut self, target: &mut T, ratio: f32);
}Expand description
A lens over a subset of a component.
The lens takes a target component or asset from a query, as a mutable
reference, and animates (tweens) a subset of the fields of the
component/asset based on the linear ratio ratio in [0:1], already
sampled from the easing curve.
§Example
Implement Lens for a custom type:
struct MyLens {
start: f32,
end: f32,
}
#[derive(Component)]
struct MyStruct(f32);
impl Lens<MyStruct> for MyLens {
fn lerp(&mut self, target: &mut MyStruct, ratio: f32) {
target.0 = self.start + (self.end - self.start) * ratio;
}
}Required Methods§
sourcefn lerp(&mut self, target: &mut T, ratio: f32)
fn lerp(&mut self, target: &mut T, ratio: f32)
Perform a linear interpolation (lerp) over the subset of fields of a
component or asset the lens focuses on, based on the linear ratio
ratio. The target component or asset is mutated in place. The
implementation decides which fields are interpolated, and performs
the animation in-place, overwriting the target.