Trait cgmath::prelude::MetricSpace[−][src]

pub trait MetricSpace: Sized {
    type Metric;
    fn distance2(self, other: Self) -> Self::Metric;

    fn distance(self, other: Self) -> Self::Metric
    where
        Self::Metric: Float,
    { ... }
}

Expand description

A type with a distance function between values.

Examples are vectors, points, and quaternions.

Associated Types

[src]

type Metric

The metric to be returned by the distance function.

Required methods

[src]

fn distance2(self, other: Self) -> Self::Metric

Returns the squared distance.

This does not perform an expensive square root operation like in MetricSpace::distance method, and so can be used to compare distances more efficiently.