Struct KeyframeOffsetCacheForProperty 

struct KeyframeOffsetCacheForProperty {
    last_keyframe_that_defined_property: usize,
    next_keyframe_that_defines_property: Option<usize>,
}

Caches the indices of keyframes that declare a specific property.

While traversing the list of keyframes, this is used to avoid repeatedly searching for the next or last keyframe that declares the property. That would result in quadratic runtime with respect to the number of keyframes.

Fields

last_keyframe_that_defined_property: usize

The index of a previous keyframe that declares the property.

Note that if the first keyframe does not declare a property, then it implicitly uses the computed value of that property. That’s why there’s always a preceding keyframe with the property.

next_keyframe_that_defines_property: Option<usize>

The index of a future keyframe or None if we have not yet walked the list of keyframes to find the next index.

There will always be a next keyframe because the last keyframe (like the first keyframe) declares all animating properties.

Trait Implementations

impl Clone for KeyframeOffsetCacheForProperty

fn clone(&self) -> KeyframeOffsetCacheForProperty

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for KeyframeOffsetCacheForProperty

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for KeyframeOffsetCacheForProperty

fn default() -> KeyframeOffsetCacheForProperty

Returns the “default value” for a type.

impl Copy for KeyframeOffsetCacheForProperty