forked from M-Labs/nalgebra
28 lines
795 B
Rust
28 lines
795 B
Rust
use approx::AbsDiffEq;
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use na::RealField;
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/// Default epsilon value used for approximate comparison.
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pub fn epsilon<N: AbsDiffEq<Epsilon = N>>() -> N {
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N::default_epsilon()
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}
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/// The value of PI.
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///
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/// # See also:
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///
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/// * [`four_over_pi`](fn.four_over_pi.html)
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/// * [`half_pi`](fn.half_pi.html)
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/// * [`one_over_pi`](fn.one_over_pi.html)
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/// * [`one_over_two_pi`](fn.one_over_two_pi.html)
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/// * [`quarter_pi`](fn.quarter_pi.html)
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/// * [`root_half_pi`](fn.root_half_pi.html)
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/// * [`root_pi`](fn.root_pi.html)
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/// * [`root_two_pi`](fn.root_two_pi.html)
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/// * [`three_over_two_pi`](fn.three_over_two_pi.html)
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/// * [`two_over_pi`](fn.two_over_pi.html)
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/// * [`two_over_root_pi`](fn.two_over_root_pi.html)
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/// * [`two_pi`](fn.two_pi.html)
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pub fn pi<N: RealField>() -> N {
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N::pi()
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}
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