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use na::{U2, U3};
use traits::Number;
use aliases::{TVec2, TVec3, TMat3, TMat4};
pub fn proj2d<N: Number>(m: &TMat3<N>, normal: &TVec2<N>) -> TMat3<N> {
let mut res = TMat3::identity();
{
let mut part = res.fixed_slice_mut::<U2, U2>(0, 0);
part -= normal * normal.transpose();
}
m * res
}
pub fn proj<N: Number>(m: &TMat4<N>, normal: &TVec3<N>) -> TMat4<N> {
let mut res = TMat4::identity();
{
let mut part = res.fixed_slice_mut::<U3, U3>(0, 0);
part -= normal * normal.transpose();
}
m * res
}
pub fn reflect2d<N: Number>(m: &TMat3<N>, normal: &TVec2<N>) -> TMat3<N> {
let mut res = TMat3::identity();
{
let mut part = res.fixed_slice_mut::<U2, U2>(0, 0);
part -= (normal * N::from_f64(2.0).unwrap()) * normal.transpose();
}
m * res
}
pub fn reflect<N: Number>(m: &TMat4<N>, normal: &TVec3<N>) -> TMat4<N> {
let mut res = TMat4::identity();
{
let mut part = res.fixed_slice_mut::<U3, U3>(0, 0);
part -= (normal * N::from_f64(2.0).unwrap()) * normal.transpose();
}
m * res
}
pub fn scale_bias_matrix<N: Number>(scale: N, bias: N) -> TMat4<N> {
let _0 = N::zero();
let _1 = N::one();
TMat4::new(
scale, _0, _0, bias,
_0, scale, _0, bias,
_0, _0, scale, bias,
_0, _0, _0, _1,
)
}
pub fn scale_bias<N: Number>(m: &TMat4<N>, scale: N, bias: N) -> TMat4<N> {
m * scale_bias_matrix(scale, bias)
}
pub fn shear2d_x<N: Number>(m: &TMat3<N>, y: N) -> TMat3<N> {
let _0 = N::zero();
let _1 = N::one();
let shear = TMat3::new(
_1, y, _0,
_0, _1, _0,
_0, _0, _1
);
m * shear
}
pub fn shear_x<N: Number>(m: &TMat4<N>, y: N, z: N) -> TMat4<N> {
let _0 = N::zero();
let _1 = N::one();
let shear = TMat4::new(
_1, _0, _0, _0,
y, _1, _0, _0,
z, _0, _1, _0,
_0, _0, _0, _1,
);
m * shear
}
pub fn shear2d_y<N: Number>(m: &TMat3<N>, x: N) -> TMat3<N> {
let _0 = N::zero();
let _1 = N::one();
let shear = TMat3::new(
_1, _0, _0,
x, _1, _0,
_0, _0, _1
);
m * shear
}
pub fn shear_y<N: Number>(m: &TMat4<N>, x: N, z: N) -> TMat4<N> {
let _0 = N::zero();
let _1 = N::one();
let shear = TMat4::new(
_1, x, _0, _0,
_0, _1, _0, _0,
_0, z, _1, _0,
_0, _0, _0, _1,
);
m * shear
}
pub fn shear_z<N: Number>(m: &TMat4<N>, x: N, y: N) -> TMat4<N> {
let _0 = N::zero();
let _1 = N::one();
let shear = TMat4::new(
_1, _0, x, _0,
_0, _1, y, _0,
_0, _0, _1, _0,
_0, _0, _0, _1,
);
m * shear
}