pub struct CubicCurve<P: Point> { /* private fields */ }
Expand description

A collection of CubicSegments chained into a curve.

Use any struct that implements the CubicGenerator trait to create a new curve, such as CubicBezier.

Implementations§

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impl<P: Point> CubicCurve<P>

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pub fn position(&self, t: f32) -> P

Compute the position of a point on the cubic curve at the parametric value t.

Note that t varies from 0..=(n_points - 3).

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pub fn velocity(&self, t: f32) -> P

Compute the first derivative with respect to t at t. This is the instantaneous velocity of a point on the cubic curve at t.

Note that t varies from 0..=(n_points - 3).

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pub fn acceleration(&self, t: f32) -> P

Compute the second derivative with respect to t at t. This is the instantaneous acceleration of a point on the cubic curve at t.

Note that t varies from 0..=(n_points - 3).

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pub fn iter_samples<'a, 'b: 'a>( &'b self, subdivisions: usize, sample_function: impl FnMut(&Self, f32) -> P + 'a ) -> impl Iterator<Item = P> + 'a

A flexible iterator used to sample curves with arbitrary functions.

This splits the curve into subdivisions of evenly spaced t values across the length of the curve from start (t = 0) to end (t = n), where n = self.segment_count(), returning an iterator evaluating the curve with the supplied sample_function at each t.

For subdivisions = 2, this will split the curve into two lines, or three points, and return an iterator with 3 items, the three points, one at the start, middle, and end.

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pub fn segments(&self) -> &[CubicSegment<P>]

The list of segments contained in this CubicCurve.

This spline’s global t value is equal to how many segments it has.

All method accepting t on CubicCurve depends on the global t. When sampling over the entire curve, you should either use one of the iter_* methods or account for the segment count using curve.segments().len().

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pub fn iter_positions( &self, subdivisions: usize ) -> impl Iterator<Item = P> + '_

Iterate over the curve split into subdivisions, sampling the position at each step.

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pub fn iter_velocities( &self, subdivisions: usize ) -> impl Iterator<Item = P> + '_

Iterate over the curve split into subdivisions, sampling the velocity at each step.

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pub fn iter_accelerations( &self, subdivisions: usize ) -> impl Iterator<Item = P> + '_

Iterate over the curve split into subdivisions, sampling the acceleration at each step.

Trait Implementations§

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impl<P: Clone + Point> Clone for CubicCurve<P>

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fn clone(&self) -> CubicCurve<P>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<P: Debug + Point> Debug for CubicCurve<P>

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

Formats the value using the given formatter. Read more
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impl<P: PartialEq + Point> PartialEq for CubicCurve<P>

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fn eq(&self, other: &CubicCurve<P>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<P: Point> StructuralPartialEq for CubicCurve<P>

Auto Trait Implementations§

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impl<P> RefUnwindSafe for CubicCurve<P>
where P: RefUnwindSafe,

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impl<P> Send for CubicCurve<P>
where P: Send,

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impl<P> Sync for CubicCurve<P>
where P: Sync,

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impl<P> Unpin for CubicCurve<P>
where P: Unpin,

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impl<P> UnwindSafe for CubicCurve<P>
where P: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.