Trait cgmath::Rotation

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pub trait Rotation: Sized + Copy + Onewhere
    Self: AbsDiffEq<Epsilon = <Self::Space as EuclideanSpace>::Scalar> + RelativeEq<Epsilon = <Self::Space as EuclideanSpace>::Scalar> + UlpsEq<Epsilon = <Self::Space as EuclideanSpace>::Scalar> + Product<Self>,
    <Self::Space as EuclideanSpace>::Scalar: BaseFloat,{
    type Space: EuclideanSpace;

    // Required methods
    fn look_at(
        dir: <Self::Space as EuclideanSpace>::Diff,
        up: <Self::Space as EuclideanSpace>::Diff
    ) -> Self;
    fn between_vectors(
        a: <Self::Space as EuclideanSpace>::Diff,
        b: <Self::Space as EuclideanSpace>::Diff
    ) -> Self;
    fn rotate_vector(
        &self,
        vec: <Self::Space as EuclideanSpace>::Diff
    ) -> <Self::Space as EuclideanSpace>::Diff;
    fn invert(&self) -> Self;

    // Provided method
    fn rotate_point(&self, point: Self::Space) -> Self::Space { ... }
}
Expand description

A trait for a generic rotation. A rotation is a transformation that creates a circular motion, and preserves at least one point in the space.

Required Associated Types§

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type Space: EuclideanSpace

Required Methods§

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fn look_at( dir: <Self::Space as EuclideanSpace>::Diff, up: <Self::Space as EuclideanSpace>::Diff ) -> Self

Create a rotation to a given direction with an ‘up’ vector.

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fn between_vectors( a: <Self::Space as EuclideanSpace>::Diff, b: <Self::Space as EuclideanSpace>::Diff ) -> Self

Create a shortest rotation to transform vector ‘a’ into ‘b’. Both given vectors are assumed to have unit length.

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fn rotate_vector( &self, vec: <Self::Space as EuclideanSpace>::Diff ) -> <Self::Space as EuclideanSpace>::Diff

Rotate a vector using this rotation.

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fn invert(&self) -> Self

Create a new rotation which “un-does” this rotation. That is, r * r.invert() is the identity.

Provided Methods§

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fn rotate_point(&self, point: Self::Space) -> Self::Space

Rotate a point using this rotation, by converting it to its representation as a vector.

Implementors§