forked from M-Labs/nalgebra
21 lines
560 B
Rust
21 lines
560 B
Rust
use crate::aliases::TVec3;
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use crate::traits::Number;
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/// Returns `true` if `{a, b, c}` forms a left-handed trihedron.
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///
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/// # See also:
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///
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/// * [`right_handed`](fn.right_handed.html)
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pub fn left_handed<T: Number>(a: &TVec3<T>, b: &TVec3<T>, c: &TVec3<T>) -> bool {
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a.cross(b).dot(c) < T::zero()
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}
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/// Returns `true` if `{a, b, c}` forms a right-handed trihedron.
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///
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/// # See also:
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///
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/// * [`left_handed`](fn.left_handed.html)
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pub fn right_handed<T: Number>(a: &TVec3<T>, b: &TVec3<T>, c: &TVec3<T>) -> bool {
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a.cross(b).dot(c) > T::zero()
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}
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