111 lines
3.1 KiB
Rust
111 lines
3.1 KiB
Rust
use crate::aliases::{TMat3, TMat4, TVec2, TVec3};
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use crate::traits::Number;
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/// Build planar projection matrix along normal axis and right-multiply it to `m`.
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pub fn proj2d<T: Number>(m: &TMat3<T>, normal: &TVec2<T>) -> TMat3<T> {
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let mut res = TMat3::identity();
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{
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let mut part = res.fixed_slice_mut::<2, 2>(0, 0);
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part -= normal * normal.transpose();
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}
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m * res
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}
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/// Build planar projection matrix along normal axis, and right-multiply it to `m`.
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pub fn proj<T: Number>(m: &TMat4<T>, normal: &TVec3<T>) -> TMat4<T> {
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let mut res = TMat4::identity();
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{
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let mut part = res.fixed_slice_mut::<3, 3>(0, 0);
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part -= normal * normal.transpose();
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}
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m * res
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}
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/// Builds a reflection matrix and right-multiply it to `m`.
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pub fn reflect2d<T: Number>(m: &TMat3<T>, normal: &TVec2<T>) -> TMat3<T> {
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let mut res = TMat3::identity();
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{
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let mut part = res.fixed_slice_mut::<2, 2>(0, 0);
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part -= (normal * T::from_f64(2.0).unwrap()) * normal.transpose();
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}
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m * res
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}
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/// Builds a reflection matrix, and right-multiply it to `m`.
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pub fn reflect<T: Number>(m: &TMat4<T>, normal: &TVec3<T>) -> TMat4<T> {
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let mut res = TMat4::identity();
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{
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let mut part = res.fixed_slice_mut::<3, 3>(0, 0);
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part -= (normal * T::from_f64(2.0).unwrap()) * normal.transpose();
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}
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m * res
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}
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/// Builds a scale-bias matrix.
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pub fn scale_bias_matrix<T: Number>(scale: T, bias: T) -> TMat4<T> {
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let _0 = T::zero();
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let _1 = T::one();
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TMat4::new(
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scale, _0, _0, bias, _0, scale, _0, bias, _0, _0, scale, bias, _0, _0, _0, _1,
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)
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}
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/// Builds a scale-bias matrix, and right-multiply it to `m`.
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pub fn scale_bias<T: Number>(m: &TMat4<T>, scale: T, bias: T) -> TMat4<T> {
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m * scale_bias_matrix(scale, bias)
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}
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/// Transforms a matrix with a shearing on X axis.
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pub fn shear2d_x<T: Number>(m: &TMat3<T>, y: T) -> TMat3<T> {
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let _0 = T::zero();
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let _1 = T::one();
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let shear = TMat3::new(_1, y, _0, _0, _1, _0, _0, _0, _1);
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m * shear
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}
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/// Transforms a matrix with a shearing on Y axis.
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pub fn shear_x<T: Number>(m: &TMat4<T>, y: T, z: T) -> TMat4<T> {
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let _0 = T::zero();
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let _1 = T::one();
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let shear = TMat4::new(_1, _0, _0, _0, y, _1, _0, _0, z, _0, _1, _0, _0, _0, _0, _1);
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m * shear
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}
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/// Transforms a matrix with a shearing on Y axis.
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pub fn shear2d_y<T: Number>(m: &TMat3<T>, x: T) -> TMat3<T> {
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let _0 = T::zero();
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let _1 = T::one();
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let shear = TMat3::new(_1, _0, _0, x, _1, _0, _0, _0, _1);
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m * shear
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}
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/// Transforms a matrix with a shearing on Y axis.
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pub fn shear_y<T: Number>(m: &TMat4<T>, x: T, z: T) -> TMat4<T> {
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let _0 = T::zero();
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let _1 = T::one();
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let shear = TMat4::new(_1, x, _0, _0, _0, _1, _0, _0, _0, z, _1, _0, _0, _0, _0, _1);
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m * shear
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}
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/// Transforms a matrix with a shearing on Z axis.
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pub fn shear_z<T: Number>(m: &TMat4<T>, x: T, y: T) -> TMat4<T> {
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let _0 = T::zero();
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let _1 = T::one();
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let shear = TMat4::new(_1, _0, x, _0, _0, _1, y, _0, _0, _0, _1, _0, _0, _0, _0, _1);
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m * shear
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}
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