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Add flip_y_up_to_z_up method to Matrix4 #381

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Add flip_y_up_to_z_up method to Matrix4 #381

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12 changes: 12 additions & 0 deletions src/matrix.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -299,6 +299,18 @@ impl<S: BaseFloat> Matrix4<S> {
S::zero(),
S::one())
}

/// Create a matrix which flips the y and z coordnates.
///
/// This is used to transform from a y-up coordinate system to
/// a z-up coordinate systems.
#[inline]
pub fn flip_y_up_to_z_up() -> Matrix4<S> {
Matrix4::new(S::one(), S::zero(), S::zero(), S::zero(),
S::zero(), S::zero(), S::one(), S::zero(),
S::zero(), -S::one(), S::zero(), S::zero(),
S::zero(), S::zero(), S::zero(), S::one())
}
}

impl<S: BaseFloat> Zero for Matrix2<S> {
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