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nalgebra
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More rotation sugar.

This commit is contained in:
Sébastien Crozet 2013-06-29 19:02:51 +00:00
parent f8515f4683
commit 02e22717a4
1 changed files with 36 additions and 8 deletions
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44
src/traits/rotation.rs
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@ -35,10 +35,10 @@ pub trait Rotate<V>
* - `point`: the center of rotation. * - `point`: the center of rotation.
*/ */
#[inline] #[inline]
pub fn rotate_wrt_point<M: Translatable<LV, M2>, pub fn rotated_wrt_point<M: Translatable<LV, M2>,
M2: Rotation<AV> + Translation<LV>, M2: Rotation<AV> + Translation<LV>,
LV: Neg<LV>, LV: Neg<LV>,
AV> AV>
(m: &M, ammount: &AV, center: &LV) -> M2 (m: &M, ammount: &AV, center: &LV) -> M2
{ {
let mut res = m.translated(&-center); let mut res = m.translated(&-center);
@ -49,6 +49,17 @@ pub fn rotate_wrt_point<M: Translatable<LV, M2>,
res res
} }
#[inline]
pub fn rotate_wrt_point<M: Rotation<AV> + Translation<LV>,
LV: Neg<LV>,
AV>
(m: &mut M, ammount: &AV, center: &LV)
{
m.translate_by(&-center);
m.rotate_by(ammount);
m.translate_by(center);
}
/** /**
* Applies a rotation centered on the input translation. * Applies a rotation centered on the input translation.
* *
@ -56,9 +67,26 @@ pub fn rotate_wrt_point<M: Translatable<LV, M2>,
* - `ammount`: the rotation to apply. * - `ammount`: the rotation to apply.
*/ */
#[inline] #[inline]
pub fn rotate_wrt_center<M: Translatable<LV, M2> + Translation<LV>, pub fn rotated_wrt_center<M: Translatable<LV, M2> + Translation<LV>,
M2: Rotation<AV> + Translation<LV>, M2: Rotation<AV> + Translation<LV>,
LV: Neg<LV>,
AV>
(m: &M, ammount: &AV) -> M2
{ rotated_wrt_point(m, ammount, &m.translation()) }
/**
* Applies a rotation centered on the input translation.
*
* - `m`: the object to be rotated.
* - `ammount`: the rotation to apply.
*/
#[inline]
pub fn rotate_wrt_center<M: Translatable<LV, M> + Translation<LV> + Rotation<AV>,
LV: Neg<LV>, LV: Neg<LV>,
AV> AV>
(m: &M, ammount: &AV) -> M2 (m: &mut M, ammount: &AV)
{ rotate_wrt_point(m, ammount, &m.translation()) } {
let t = m.translation();
rotate_wrt_point(m, ammount, &t)
}