Struct Meta 

pub struct Meta {
    pub version: u32,
    pub markers: BTreeMap<String, f64>,
    pub eases: BTreeMap<String, [f64; 4]>,
    pub tunables: BTreeMap<String, f64>,
    pub audio: Option<AudioMeta>,
    pub transition: Option<TransitionMeta>,
    pub extra: BTreeMap<String, Value>,
}

Contents of <scene>.meta.json.

The file is the source of truth for markers, eases and tunables; scene code only provides defaults. Unknown keys are preserved verbatim.

Fields

version: u32

Schema version, META_SCHEMA_VERSION.

markers: BTreeMap<String, f64>

Marker times in seconds from the start of the scene.

eases: BTreeMap<String, [f64; 4]>

Named eases as [x1, y1, x2, y2].

tunables: BTreeMap<String, f64>

Tunable values.

audio: Option<AudioMeta>

Soundtrack placement.

transition: Option<TransitionMeta>

Incoming transition length, edited on the timeline.

extra: BTreeMap<String, Value>

Keys this version does not know, kept as they are.

Implementations

impl Meta

pub fn parse(text: &str) -> Result<Self, MetaError>

Parses and validates a meta.json file.

Errors

If the text is not valid JSON of this shape, has another schema version, or contains an invalid name.

pub fn validate(&self) -> Result<(), MetaError>

Checks that all names are valid.

Errors

MetaError::InvalidName for the first name that is not [a-z0-9_-]+.

pub fn to_pretty_string(&self) -> String

Deterministic formatting: keys sorted at every level, two-space indent, trailing newline — so diffs in git stay readable.

Trait Implementations

impl Clone for Meta

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Meta

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

Formats the value using the given formatter.

impl Default for Meta

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Meta

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Meta

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for Meta

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Meta