forked from M-Labs/nalgebra
44 lines
1.3 KiB
Rust
44 lines
1.3 KiB
Rust
use na::{Real, UnitComplex};
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use aliases::{TMat3, TVec2};
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use traits::Number;
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/// Builds a 2D rotation matrix from an angle and right-multiply it to `m`.
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///
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/// # See also:
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///
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/// * [`rotation2d`](fn.rotation2d.html)
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/// * [`scale2d`](fn.scale2d.html)
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/// * [`scaling2d`](fn.scaling2d.html)
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/// * [`translate2d`](fn.translate2d.html)
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/// * [`translation2d`](fn.translation2d.html)
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pub fn rotate2d<N: Real>(m: &TMat3<N>, angle: N) -> TMat3<N> {
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m * UnitComplex::new(angle).to_homogeneous()
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}
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/// Builds a 2D scaling matrix and right-multiply it to `m`.
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///
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/// # See also:
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///
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/// * [`rotate2d`](fn.rotate2d.html)
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/// * [`rotation2d`](fn.rotation2d.html)
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/// * [`scaling2d`](fn.scaling2d.html)
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/// * [`translate2d`](fn.translate2d.html)
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/// * [`translation2d`](fn.translation2d.html)
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pub fn scale2d<N: Number>(m: &TMat3<N>, v: &TVec2<N>) -> TMat3<N> {
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m.prepend_nonuniform_scaling(v)
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}
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/// Builds a translation matrix and right-multiply it to `m`.
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///
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/// # See also:
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///
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/// * [`rotate2d`](fn.rotate2d.html)
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/// * [`rotation2d`](fn.rotation2d.html)
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/// * [`scale2d`](fn.scale2d.html)
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/// * [`scaling2d`](fn.scaling2d.html)
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/// * [`translation2d`](fn.translation2d.html)
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pub fn translate2d<N: Number>(m: &TMat3<N>, v: &TVec2<N>) -> TMat3<N> {
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m.prepend_translation(v)
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}
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