Struct MotionPathConfig 

pub struct MotionPathConfig {
    pub path: String,
    pub delay: f64,
    pub duration: f64,
    pub repeat: bool,
    pub orient: bool,
    pub orient_offset: f64,
    pub easing: EasingType,
}

Configuration for the motion_path animation effect: moves — and, optionally, orients — a component along an SVG path.

Path syntax

path is the SVG path d-attribute mini-language (M/L/H/V/C/ S/Q/T/A/Z, absolute or relative) — the exact syntax shape’s ShapeType::Path { data } already accepts and parses with skia_safe::Path::from_svg (engine/renderer/shapes.rs). This effect reuses that same call rather than inventing a second path grammar, and measures the parsed path with skia_safe::PathMeasure — the exact primitive svg.rs (dash-reveal of an SVG document’s paths) and arrow.rs (dash-reveal of a bezier curve, plus its own tangent-based arrowhead orientation) already use for draw_progress. orient’s tangent-to-degrees math is the same atan2(tangent.y, tangent.x) idiom arrow.rs::draw_arrowhead already computes for its arrowhead.

Coordinate space

Path coordinates are pixel deltas relative to wherever CSS layout placed the component absent this effect — the same convention orbit already uses for its circular motion (see OrbitConfig/apply_orbits), and the only one implementable here: the resolver this effect plugs into (engine::animator::resolve_props_for_effects) receives only (effects, time, scene_duration) — never the component’s resolved layout box or the viewport, which are computed downstream in paint_pass.rs/box_builder.rs. So "M0,0 L200,0" slides the component 200px right of its laid-out position (and back, if the effect loops); "M100,0 L300,0" starts the component already displaced 100px right of its laid-out position — a direct, intentional consequence of treating the whole path as a translate delta, not a bug to normalize away.

Degenerate paths

• Empty or syntactically invalid path (e.g. "", garbage text) is rejected at JSON-parse time by [deserialize_motion_path_data] — a named error, never a silent no-op, mirroring [deserialize_motion_property]’s treatment of an unrecognised wiggle/keyframes property name.
• Zero measured length (a single point, e.g. "M50,50", or every segment collapsing onto one point) is syntactically valid SVG and is not rejected at parse time — it has a well-defined render-time meaning: the component holds at that single point for the whole timeline, and orient (if set) contributes no rotation (a tangent is undefined at zero length) instead of propagating a NaN. See engine::animator::motion_path_sample. validate_schema.rs flags it as a (non-blocking) warning, since it is very likely — but not certainly — an authoring mistake (e.g. duplicated coordinates).

Fields

path: String

SVG path data (the d-attribute mini-language). Must contain at least one drawable point — an empty or unparsable path is rejected at deserialize time (see [deserialize_motion_path_data]).

delay: f64

Delay before travel starts (seconds). Before this, the component sits at the path’s start point (progress 0) — the same “hold at the entrance state” behaviour every other preset/effect with a delay already has.

duration: f64

Time to travel the whole path once (seconds).

repeat: bool

Loop the traversal continuously instead of holding at the path’s end once delay + duration has elapsed.

orient: bool

Rotate the component to face the path’s tangent direction (default false — position without orientation, e.g. for content that should stay upright while it moves).

orient_offset: f64

Degrees added on top of the tangent-derived rotation, for assets whose drawn “forward” direction is not +X (default 0.0). E.g. an icon drawn pointing up needs orient_offset: 90.

easing: EasingType

Easing applied to progress along the path (default linear — constant speed along the curve, the expected default for a hand-authored trajectory; ease_in/ease_out bunches travel toward one end).

Trait Implementations

impl Clone for MotionPathConfig

fn clone(&self) -> MotionPathConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MotionPathConfig

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MotionPathConfig

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for MotionPathConfig

fn schema_name() -> String

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn is_referenceable() -> bool

Whether JSON Schemas generated for this type should be re-used where possible using the $ref keyword.

impl PartialEq for MotionPathConfig

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for MotionPathConfig

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 MotionPathConfig