forked from M-Labs/nalgebra
1126 lines
39 KiB
Rust
1126 lines
39 KiB
Rust
use num::Zero;
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use std::cmp::Ordering;
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use std::marker::PhantomData;
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use std::fmt;
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use std::any::TypeId;
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use std::mem;
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use approx::ApproxEq;
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use alga::general::{Ring, Real};
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use core::{Scalar, Unit};
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use core::dimension::{Dim, DimAdd, DimSum, U1, U2};
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use core::constraint::{ShapeConstraint, SameNumberOfRows, SameNumberOfColumns};
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use core::iter::{MatrixIter, MatrixIterMut};
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use core::allocator::{Allocator, OwnedAllocator, SameShapeAllocator, SameShapeR, SameShapeC};
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use core::storage::{Storage, StorageMut, Owned, OwnedStorage, MulStorage, TrMulStorage, SumStorage};
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/// The type of the result of a matrix allocation by the allocator `A`.
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pub type OwnedMatrix<N, R, C, A> = Matrix<N, R, C, <A as Allocator<N, R, C>>::Buffer>;
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/// A square matrix.
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pub type SquareMatrix<N, D, S> = Matrix<N, D, D, S>;
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/// The type of the result of a square matrix allocation by the allocator `A`.
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pub type OwnedSquareMatrix<N, D, A> = OwnedMatrix<N, D, D, A>;
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/// A matrix with one column and `D` rows.
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pub type ColumnVector<N, D, S> = Matrix<N, D, U1, S>;
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/// An owned matrix with one column and `D` rows.
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pub type OwnedColumnVector<N, D, A> = OwnedMatrix<N, D, U1, A>;
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/// A matrix with one row and `D` columns.
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pub type RowVector<N, D, S> = Matrix<N, U1, D, S>;
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/// An owned matrix with one row and `D` columns.
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pub type OwnedRowVector<N, D, A> = OwnedMatrix<N, U1, D, A>;
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/// The type of the result of a matrix sum.
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pub type MatrixSum<N, R1, C1, R2, C2, SA> =
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Matrix<N, SameShapeR<R1, R2>, SameShapeC<C1, C2>, SumStorage<N, R1, C1, R2, C2, SA>>;
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/// The type of the result of a matrix sum.
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pub type ColumnVectorSum<N, R1, R2, SA> =
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Matrix<N, SameShapeR<R1, R2>, U1, SumStorage<N, R1, U1, R2, U1, SA>>;
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/// The type of the result of a matrix cross product.
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pub type MatrixCross<N, R1, C1, R2, C2, SA> = MatrixSum<N, R1, C1, R2, C2, SA>;
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/// The type of the result of a matrix multiplication.
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pub type MatrixMul<N, R1, C1, C2, SA> = Matrix<N, R1, C2, MulStorage<N, R1, C1, C2, SA>>;
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/// The type of the result of a matrix transpose-multiplication.
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pub type MatrixTrMul<N, R1, C1, C2, SA> = Matrix<N, C1, C2, TrMulStorage<N, R1, C1, C2, SA>>;
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/// The matrix with storage `S` and scalar type changed from `NOld` to `NNew`.
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pub type MatrixWithScalar<NOld, NNew, R, C, S> =
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Matrix<NNew, R, C, <<S as Storage<NOld, R, C>>::Alloc as Allocator<NNew, R, C>>::Buffer>;
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/// The most generic column-major matrix (and vector) type.
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///
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/// It combines four type parameters:
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/// - `N`: for the matrix components scalar type.
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/// - `R`: for the matrix number of rows.
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/// - `C`: for the matrix number of columns.
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/// - `S`: for the matrix data storage, i.e., the buffer that actually contains the matrix
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/// components.
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///
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/// The matrix dimensions parameters `R` and `C` can either be:
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/// - type-level unsigned integer contants (e.g. `U1`, `U124`) from the `nalgebra::` root module.
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/// All numbers from 0 to 127 are defined that way.
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/// - type-level unsigned integer constants (e.g. `U1024`, `U10000`) from the `typenum::` crate.
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/// Using those, you will not get error messages as nice as for numbers smaller than 128 defined on
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/// the `nalgebra::` module.
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/// - the special value `Dynamic` from the `nalgebra::` root module. This indicates that the
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/// specified dimension is not known at compile-time. Note that this will generally imply that the
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/// matrix data storage `S` performs a dynamic allocation and contains extra metadata for the
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/// matrix shape.
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///
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/// Note that mixing `Dynamic` with type-level unsigned integers is allowed. Actually, a
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/// dynamically-sized column vector should be represented as a `Matrix<N, Dynamic, U1, S>` (given
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/// some concrete types for `N` and a compatible data storage type `S`).
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#[repr(C)]
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#[derive(Hash, Debug, Clone, Copy)]
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#[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
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pub struct Matrix<N: Scalar, R: Dim, C: Dim, S> {
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/// The data storage that contains all the matrix components and informations about its number
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/// of rows and column (if needed).
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pub data: S,
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#[cfg_attr(feature = "serde-serialize", serde(skip_serializing, skip_deserializing))]
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_phantoms: PhantomData<(N, R, C)>
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}
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impl<N: Scalar, R: Dim, C: Dim, S> Matrix<N, R, C, S> {
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/// Creates a new matrix with the given data without statically checking that the matrix
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/// dimension matches the storage dimension.
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#[inline]
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pub unsafe fn from_data_statically_unchecked(data: S) -> Matrix<N, R, C, S> {
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Matrix {
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data: data,
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_phantoms: PhantomData
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}
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}
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}
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impl<N: Scalar, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
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/// Creates a new matrix with the given data.
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#[inline]
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pub fn from_data(data: S) -> Matrix<N, R, C, S> {
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unsafe {
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Self::from_data_statically_unchecked(data)
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}
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}
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/// Moves this matrix into one that owns its data.
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#[inline]
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pub fn into_owned(self) -> OwnedMatrix<N, R, C, S::Alloc> {
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Matrix::from_data(self.data.into_owned())
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}
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// FIXME: this could probably benefit from specialization.
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// XXX: bad name.
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/// Moves this matrix into one that owns its data. The actual type of the result depends on
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/// matrix storage combination rules for addition.
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#[inline]
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pub fn into_owned_sum<R2, C2>(self) -> MatrixSum<N, R, C, R2, C2, S>
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where R2: Dim, C2: Dim,
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S::Alloc: SameShapeAllocator<N, R, C, R2, C2, S>,
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ShapeConstraint: SameNumberOfRows<R, R2> + SameNumberOfColumns<C, C2> {
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if TypeId::of::<SumStorage<N, R, C, R2, C2, S>>() == TypeId::of::<Owned<N, R, C, S::Alloc>>() {
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// We can just return `self.into_owned()`.
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unsafe {
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// FIXME: check that those copies are optimized away by the compiler.
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let owned = self.into_owned();
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let res = mem::transmute_copy(&owned);
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mem::forget(owned);
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res
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}
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}
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else {
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self.clone_owned_sum()
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}
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}
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/// Clones this matrix into one that owns its data.
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#[inline]
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pub fn clone_owned(&self) -> OwnedMatrix<N, R, C, S::Alloc> {
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Matrix::from_data(self.data.clone_owned())
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}
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/// Clones this matrix into one that owns its data. The actual type of the result depends on
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/// matrix storage combination rules for addition.
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#[inline]
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pub fn clone_owned_sum<R2, C2>(&self) -> MatrixSum<N, R, C, R2, C2, S>
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where R2: Dim, C2: Dim,
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S::Alloc: SameShapeAllocator<N, R, C, R2, C2, S>,
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ShapeConstraint: SameNumberOfRows<R, R2> + SameNumberOfColumns<C, C2> {
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let (nrows, ncols) = self.shape();
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let nrows: SameShapeR<R, R2> = Dim::from_usize(nrows);
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let ncols: SameShapeC<C, C2> = Dim::from_usize(ncols);
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let mut res: MatrixSum<N, R, C, R2, C2, S> = unsafe {
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Matrix::new_uninitialized_generic(nrows, ncols)
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};
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for (r, s) in res.iter_mut().zip(self.iter()) {
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*r = *s
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}
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res
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}
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/// The total number of elements of this matrix.
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#[inline]
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pub fn len(&self) -> usize {
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let (nrows, ncols) = self.shape();
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nrows * ncols
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}
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/// The shape of this matrix returned as the tuple (number of rows, number of columns).
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#[inline]
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pub fn shape(&self) -> (usize, usize) {
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let (nrows, ncols) = self.data.shape();
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(nrows.value(), ncols.value())
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}
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/// The number of rows of this matrix.
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#[inline]
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pub fn nrows(&self) -> usize {
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self.shape().0
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}
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/// The number of columns of this matrix.
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#[inline]
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pub fn ncols(&self) -> usize {
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self.shape().1
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}
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/// The strides (row stride, column stride) of this matrix.
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#[inline]
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pub fn strides(&self) -> (usize, usize) {
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let (srows, scols) = self.data.strides();
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(srows.value(), scols.value())
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}
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/// Iterates through this matrix coordinates.
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#[inline]
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pub fn iter(&self) -> MatrixIter<N, R, C, S> {
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MatrixIter::new(&self.data)
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}
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/// Computes the row and column coordinates of the i-th element of this matrix seen as a
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/// vector.
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#[inline]
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pub fn vector_to_matrix_index(&self, i: usize) -> (usize, usize) {
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let (nrows, ncols) = self.shape();
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// Two most common uses that should be optimized by the compiler for statically-sized
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// matrices.
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if nrows == 1 {
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(0, i)
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}
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else if ncols == 1 {
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(i, 0)
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}
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else {
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(i % nrows, i / nrows)
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}
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}
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/// Gets a reference to the element of this matrix at row `irow` and column `icol` without
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/// bound-checking.
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#[inline]
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pub unsafe fn get_unchecked(&self, irow: usize, icol: usize) -> &N {
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self.data.get_unchecked(irow, icol)
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}
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/// Tests whether `self` and `rhs` are equal up to a given epsilon.
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///
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/// See `relative_eq` from the `ApproxEq` trait for more details.
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#[inline]
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pub fn relative_eq<R2, C2, SB>(&self, other: &Matrix<N, R2, C2, SB>,
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eps: N::Epsilon, max_relative: N::Epsilon)
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-> bool
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where N: ApproxEq,
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R2: Dim, C2: Dim,
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SB: Storage<N, R2, C2>,
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N::Epsilon: Copy,
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ShapeConstraint: SameNumberOfRows<R, R2> + SameNumberOfColumns<C, C2> {
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assert!(self.shape() == other.shape());
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self.iter().zip(other.iter()).all(|(a, b)| a.relative_eq(b, eps, max_relative))
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}
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}
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impl<N: Scalar, R: Dim, C: Dim, S: StorageMut<N, R, C>> Matrix<N, R, C, S> {
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/// Mutably iterates through this matrix coordinates.
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#[inline]
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pub fn iter_mut(&mut self) -> MatrixIterMut<N, R, C, S> {
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MatrixIterMut::new(&mut self.data)
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}
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/// Gets a mutable reference to the i-th element of this matrix.
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#[inline]
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pub unsafe fn get_unchecked_mut(&mut self, irow: usize, icol: usize) -> &mut N {
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self.data.get_unchecked_mut(irow, icol)
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}
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/// Swaps two entries without bound-checking.
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#[inline]
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pub unsafe fn swap_unchecked(&mut self, row_cols1: (usize, usize), row_cols2: (usize, usize)) {
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self.data.swap_unchecked(row_cols1, row_cols2)
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}
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/// Swaps two entries.
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#[inline]
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pub fn swap(&mut self, row_cols1: (usize, usize), row_cols2: (usize, usize)) {
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let (nrows, ncols) = self.shape();
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assert!(row_cols1.0 < nrows && row_cols1.1 < ncols, "Matrix elements swap index out of bounds.");
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assert!(row_cols2.0 < nrows && row_cols2.1 < ncols, "Matrix elements swap index out of bounds.");
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unsafe { self.swap_unchecked(row_cols1, row_cols2) }
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}
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/// Fills this matrix with the content of another one. Both must have the same shape.
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#[inline]
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pub fn copy_from<R2, C2, SB>(&mut self, other: &Matrix<N, R2, C2, SB>)
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where R2: Dim, C2: Dim,
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SB: Storage<N, R2, C2>,
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ShapeConstraint: SameNumberOfRows<R, R2> + SameNumberOfColumns<C, C2> {
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assert!(self.shape() == other.shape(), "Unable to copy from a matrix with a different shape.");
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for (out, other) in self.iter_mut().zip(other.iter()) {
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*out = *other
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}
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}
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/// Sets all the entries of this matrix to `value`.
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#[inline]
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pub fn fill(&mut self, value: N) {
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for e in self.iter_mut() {
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*e = value
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}
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}
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/// Fills the selected row of this matrix with the content of the given vector.
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#[inline]
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pub fn set_row<C2: Dim, S2>(&mut self, i: usize, row: &RowVector<N, C2, S2>)
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where S2: Storage<N, U1, C2>,
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S::Alloc: Allocator<N, U1, C>,
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ShapeConstraint: SameNumberOfColumns<C, C2> {
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self.row_mut(i).copy_from(row);
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}
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/// Fills the selected column of this matrix with the content of the given vector.
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#[inline]
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pub fn set_column<R2: Dim, S2>(&mut self, i: usize, column: &ColumnVector<N, R2, S2>)
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where S2: Storage<N, R2, U1>,
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S::Alloc: Allocator<N, R, U1>,
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ShapeConstraint: SameNumberOfRows<R, R2> {
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self.column_mut(i).copy_from(column);
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}
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}
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impl<N: Scalar, R: Dim, C: Dim, S: OwnedStorage<N, R, C>> Matrix<N, R, C, S>
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// XXX: see the rust issue #26026
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where S::Alloc: OwnedAllocator<N, R, C, S> {
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/// Extracts a slice containing the entire matrix entries orderd column-by-columns.
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#[inline]
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pub fn as_slice(&self) -> &[N] {
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self.data.as_slice()
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}
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/// Extracts a mutable slice containing the entire matrix entries orderd column-by-columns.
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#[inline]
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pub fn as_mut_slice(&mut self) -> &mut [N] {
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self.data.as_mut_slice()
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}
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/// Returns a matrix containing the result of `f` applied to each of its entries.
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#[inline]
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pub fn map<F: FnMut(N) -> N>(&self, mut f: F) -> Matrix<N, R, C, S> {
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let shape = self.data.shape();
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let mut res: Matrix<N, R, C, S>;
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res = unsafe { Self::new_uninitialized_generic(shape.0, shape.1) };
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for i in 0 .. shape.0.value() * shape.1.value() {
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unsafe {
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let a = *self.data.get_unchecked_linear(i);
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*res.data.get_unchecked_linear_mut(i) = f(a)
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}
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}
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res
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}
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/// Returns a matrix containing the result of `f` applied to each entries of `self` and
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/// `rhs`.
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#[inline]
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pub fn zip_map<F: FnMut(N, N) -> N>(&self, rhs: &Matrix<N, R, C, S>, mut f: F) -> Matrix<N, R, C, S> {
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let shape_generic = self.data.shape();
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let shape = self.shape();
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let mut res: Matrix<N, R, C, S>;
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res = unsafe { Self::new_uninitialized_generic(shape_generic.0, shape_generic.1) };
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assert!(shape == rhs.shape(), "Matrix simultaneous traversal error: dimension mismatch.");
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for i in 0 .. shape.0 * shape.1 {
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unsafe {
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let a = *self.data.get_unchecked_linear(i);
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let b = *rhs.data.get_unchecked_linear(i);
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*res.data.get_unchecked_linear_mut(i) = f(a, b)
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}
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}
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res
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}
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}
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impl<N: Scalar, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S>
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where S::Alloc: Allocator<N, C, R> {
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/// Transposes `self`.
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#[inline]
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pub fn transpose(&self) -> OwnedMatrix<N, C, R, S::Alloc> {
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let (nrows, ncols) = self.data.shape();
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unsafe {
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let mut res: OwnedMatrix<N, C, R, S::Alloc> = Matrix::new_uninitialized_generic(ncols, nrows);
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for i in 0 .. nrows.value() {
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for j in 0 .. ncols.value() {
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*res.get_unchecked_mut(j, i) = *self.get_unchecked(i, j);
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}
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}
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res
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}
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}
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}
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impl<N: Scalar, D: Dim, S: StorageMut<N, D, D>> Matrix<N, D, D, S> {
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/// Transposes the square matrix `self` in-place.
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pub fn transpose_mut(&mut self) {
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assert!(self.is_square(), "Unable to transpose a non-square matrix in-place.");
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let dim = self.shape().0;
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for i in 1 .. dim {
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for j in 0 .. i {
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unsafe { self.swap_unchecked((i, j), (j, i)) }
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}
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}
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}
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}
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impl<N, D: Dim, S> SquareMatrix<N, D, S>
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where N: Scalar,
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S: Storage<N, D, D>,
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S::Alloc: Allocator<N, D, U1> {
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/// Creates a square matrix with its diagonal set to `diag` and all other entries set to 0.
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#[inline]
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pub fn diagonal(&self) -> OwnedColumnVector<N, D, S::Alloc> {
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assert!(self.is_square(), "Unable to get the diagonal of a non-square.");
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let dim = self.data.shape().0;
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let mut res = unsafe { OwnedColumnVector::<N, D, S::Alloc>::new_uninitialized_generic(dim, U1) };
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for i in 0 .. dim.value() {
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unsafe { *res.get_unchecked_mut(i, 0) = *self.get_unchecked(i, i); }
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}
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res
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}
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/// Computes a trace of a square matrix, i.e., the sum of its diagonal elements.
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#[inline]
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pub fn trace(&self) -> N
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where N: Ring {
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assert!(self.is_square(), "Cannot compute the trace of non-square matrix.");
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||
|
||
let dim = self.data.shape().0;
|
||
let mut res = N::zero();
|
||
|
||
for i in 0 .. dim.value() {
|
||
res += unsafe { *self.get_unchecked(i, i) };
|
||
}
|
||
|
||
res
|
||
|
||
}
|
||
}
|
||
|
||
impl<N, D, S> ColumnVector<N, D, S>
|
||
where N: Scalar + Zero,
|
||
D: DimAdd<U1>,
|
||
S: Storage<N, D, U1>,
|
||
S::Alloc: Allocator<N, DimSum<D, U1>, U1> {
|
||
/// Computes the coordinates in projective space of this vector, i.e., appends a `0` to its
|
||
/// coordinates.
|
||
#[inline]
|
||
pub fn to_homogeneous(&self) -> OwnedColumnVector<N, DimSum<D, U1>, S::Alloc> {
|
||
let len = self.len();
|
||
let hnrows = DimSum::<D, U1>::from_usize(len + 1);
|
||
let mut res = unsafe { OwnedColumnVector::<N, _, S::Alloc>::new_uninitialized_generic(hnrows, U1) };
|
||
res.generic_slice_mut((0, 0), self.data.shape()).copy_from(self);
|
||
res[(len, 0)] = N::zero();
|
||
|
||
res
|
||
}
|
||
|
||
/// Constructs a vector from coordinates in projective space, i.e., removes a `0` at the end of
|
||
/// `self`. Returns `None` if this last component is not zero.
|
||
#[inline]
|
||
pub fn from_homogeneous<SB>(v: ColumnVector<N, DimSum<D, U1>, SB>) -> Option<OwnedColumnVector<N, D, S::Alloc>>
|
||
where SB: Storage<N, DimSum<D, U1>, U1, Alloc = S::Alloc> {
|
||
if v[v.len() - 1].is_zero() {
|
||
let nrows = D::from_usize(v.len() - 1);
|
||
Some(v.generic_slice((0, 0), (nrows, U1)).into_owned())
|
||
}
|
||
else {
|
||
None
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
// // /*
|
||
// // *
|
||
// // * Conversions (AsRef, AsMut, From)
|
||
// // *
|
||
// // */
|
||
// // impl<N, R, C, A> FromIterator for Matrix<N, R, C, A>
|
||
// // where N: Scalar + Rand,
|
||
// // R: Dim,
|
||
// // C: Dim,
|
||
// // A: Allocator<N, R, C> {
|
||
// // #[inline]
|
||
// // fn from_iter<I: IntoIterator<Item = N>>(iter: I) -> Matrix<N, R, C, A> {
|
||
// // let mut iter = iter.into_iter();
|
||
// // }
|
||
// // }
|
||
// //
|
||
// // impl<N> AsRef<[[N; $dimension]; $dimension]> for $t<N> {
|
||
// // #[inline]
|
||
// // fn as_ref(&self) -> &[[N; $dimension]; $dimension] {
|
||
// // unsafe {
|
||
// // mem::transmute(self)
|
||
// // }
|
||
// // }
|
||
// // }
|
||
//
|
||
// // impl<N> AsMut<[[N; $dimension]; $dimension]> for $t<N> {
|
||
// // #[inline]
|
||
// // fn as_mut(&mut self) -> &mut [[N; $dimension]; $dimension] {
|
||
// // unsafe {
|
||
// // mem::transmute(self)
|
||
// // }
|
||
// // }
|
||
// // }
|
||
//
|
||
// // impl<'a, N> From<&'a [[N; $dimension]; $dimension]> for &'a $t<N> {
|
||
// // #[inline]
|
||
// // fn from(arr: &'a [[N; $dimension]; $dimension]) -> &'a $t<N> {
|
||
// // unsafe {
|
||
// // mem::transmute(arr)
|
||
// // }
|
||
// // }
|
||
// // }
|
||
//
|
||
// // impl<'a, N> From<&'a mut [[N; $dimension]; $dimension]> for &'a mut $t<N> {
|
||
// // #[inline]
|
||
// // fn from(arr: &'a mut [[N; $dimension]; $dimension]) -> &'a mut $t<N> {
|
||
// // unsafe {
|
||
// // mem::transmute(arr)
|
||
// // }
|
||
// // }
|
||
// // }
|
||
//
|
||
// // impl<'a, N: Clone> From<&'a [[N; $dimension]; $dimension]> for $t<N> {
|
||
// // #[inline]
|
||
// // fn from(arr: &'a [[N; $dimension]; $dimension]) -> $t<N> {
|
||
// // let tref: &$t<N> = From::from(arr);
|
||
// // tref.clone()
|
||
// // }
|
||
// // }
|
||
//
|
||
// // impl<N: Field + Copy> MatrixEdit for $t<N> {
|
||
// // type RowSlice = $dvector<N>;
|
||
// // type ColumnSlice = $dvector<N>;
|
||
// // type MinorMatrix = $tsmaller<N>;
|
||
// //
|
||
// // #[inline]
|
||
// // fn column_slice(&self, cid: usize, rstart: usize, rend: usize) -> Self::ColumnSlice {
|
||
// // let column = self.column(cid);
|
||
// //
|
||
// // $dvector::from_slice(rend - rstart, &column.as_ref()[rstart .. rend])
|
||
// // }
|
||
//
|
||
// // #[inline]
|
||
// // fn row_slice(&self, rid: usize, cstart: usize, cend: usize) -> Self::RowSlice {
|
||
// // let row = self.row(rid);
|
||
// //
|
||
// // $dvector::from_slice(cend - cstart, &row.as_ref()[cstart .. cend])
|
||
// // }
|
||
//
|
||
// // // FIXME: optimize that (+ this is a Copy/paste from dmatrix).
|
||
// // #[inline]
|
||
// // fn delete_row_column(&self, row_id: usize, column_id: usize) -> Self::MinorMatrix {
|
||
// // assert!(row_id < $dimension && column_id < $dimension);
|
||
// //
|
||
// // unsafe {
|
||
// // let mut res = $tsmaller::new_uninitialized_generic($dimension - 1, $dimension - 1);
|
||
// //
|
||
// // for irow in 0 .. row_id {
|
||
// // for icol in 0 .. column_id {
|
||
// // res.unsafe_set((irow, icol), self.unsafe_at((irow, icol)))
|
||
// // }
|
||
// //
|
||
// // for icol in column_id + 1 .. $dimension {
|
||
// // res.unsafe_set((irow, icol - 1), self.unsafe_at((irow, icol)))
|
||
// // }
|
||
// // }
|
||
// //
|
||
// // for irow in row_id + 1 .. $dimension {
|
||
// // for icol in 0 .. column_id {
|
||
// // res.unsafe_set((irow - 1, icol), self.unsafe_at((irow, icol)))
|
||
// // }
|
||
// //
|
||
// // for icol in column_id + 1 .. $dimension {
|
||
// // res.unsafe_set((irow - 1, icol - 1), self.unsafe_at((irow, icol)))
|
||
// // }
|
||
// // }
|
||
// //
|
||
// // res
|
||
// // }
|
||
// // }
|
||
//
|
||
// // // FIXME: optimize that (+ this is a Copy/paste from dmatrix).
|
||
// // #[inline]
|
||
// // fn swap_rows(&mut self, row_id1: usize, row_id2: usize) {
|
||
// // if row_id1 != row_id2 {
|
||
// // assert!(row_id1 < $dimension && row_id2 < $dimension);
|
||
// //
|
||
// // for icol in 0 .. $dimension {
|
||
// // self.swap((row_id1, icol), (row_id2, icol))
|
||
// // }
|
||
// // }
|
||
// // }
|
||
// //
|
||
// // // FIXME: optimize that (+ this is a Copy/paste from dmatrix).
|
||
// // #[inline]
|
||
// // fn swap_columns(&mut self, column_id1: usize, column_id2: usize) {
|
||
// // if column_id1 != column_id2 {
|
||
// // assert!(column_id1 < $dimension && column_id2 < $dimension);
|
||
// //
|
||
// // for irow in 0 .. $dimension {
|
||
// // self.swap((irow, column_id1), (irow, column_id2))
|
||
// // }
|
||
// // }
|
||
// // }
|
||
// // }
|
||
// //
|
||
// // /*
|
||
// // *
|
||
// // * Mean
|
||
// // *
|
||
// // */
|
||
// // impl<N: Field + Copy+ SupersetOf<f64>> Mean<$vector<N>> for $t<N> {
|
||
// // fn mean(&self) -> $vector<N> {
|
||
// // let mut res: $vector<N> = ::zero();
|
||
// // let normalizer: N = ::convert(1.0f64 / $dimension as f64);
|
||
// //
|
||
// // for i in 0 .. $dimension {
|
||
// // for j in 0 .. $dimension {
|
||
// // unsafe {
|
||
// // let acc = res.unsafe_at(j) + self.unsafe_at((i, j)) * normalizer;
|
||
// // res.unsafe_set(j, acc);
|
||
// // }
|
||
// // }
|
||
// // }
|
||
// //
|
||
// // res
|
||
// // }
|
||
// // }
|
||
// //
|
||
// // /*
|
||
// // *
|
||
// // * Componentwise unary operations.
|
||
// // *
|
||
// // */
|
||
// // componentwise_absolute!($t, $($compN),+);
|
||
// // )
|
||
// // );
|
||
//
|
||
//
|
||
// // FIXME: specialize for row-major/column major
|
||
// //
|
||
//
|
||
// // macro_rules! to_homogeneous_impl(
|
||
// // ($t: ident, $t2: ident, $dimension: expr, $dim2: expr) => (
|
||
// // impl<N: Field + Copy> ToHomogeneous<$t2<N>> for $t<N> {
|
||
// // #[inline]
|
||
// // fn to_homogeneous(&self) -> $t2<N> {
|
||
// // let mut res: $t2<N> = ::one();
|
||
// //
|
||
// // for i in 0 .. $dimension {
|
||
// // for j in 0 .. $dimension {
|
||
// // res[(i, j)] = self[(i, j)]
|
||
// // }
|
||
// // }
|
||
// //
|
||
// // res
|
||
// // }
|
||
// // }
|
||
// // )
|
||
// // );
|
||
//
|
||
// // macro_rules! from_homogeneous_impl(
|
||
// // ($t: ident, $t2: ident, $dimension: expr, $dim2: expr) => (
|
||
// // impl<N: Field + Copy> FromHomogeneous<$t2<N>> for $t<N> {
|
||
// // #[inline]
|
||
// // fn from(m: &$t2<N>) -> $t<N> {
|
||
// // let mut res: $t<N> = ::one();
|
||
// //
|
||
// // for i in 0 .. $dimension {
|
||
// // for j in 0 .. $dimension {
|
||
// // res[(i, j)] = m[(i, j)]
|
||
// // }
|
||
// // }
|
||
// //
|
||
// // // FIXME: do we have to deal the lost components
|
||
// // // (like if the 1 is not a 1… do we have to divide?)
|
||
// //
|
||
// // res
|
||
// // }
|
||
// // }
|
||
// // )
|
||
// // );
|
||
//
|
||
//
|
||
// // macro_rules! eigen_qr_impl(
|
||
// // ($t: ident, $v: ident) => (
|
||
// // impl<N: Real> EigenQR for $t<N> {
|
||
// // fn eigen_qr(&self, eps: N, niter: usize) -> ($t<N>, $v<N>) {
|
||
// // linalg::eigen_qr(self, eps, niter)
|
||
// // }
|
||
// // }
|
||
// // )
|
||
// // );
|
||
|
||
|
||
impl<N, R: Dim, C: Dim, S> ApproxEq for Matrix<N, R, C, S>
|
||
where N: Scalar + ApproxEq,
|
||
S: Storage<N, R, C>,
|
||
N::Epsilon: Copy {
|
||
type Epsilon = N::Epsilon;
|
||
|
||
#[inline]
|
||
fn default_epsilon() -> Self::Epsilon {
|
||
N::default_epsilon()
|
||
}
|
||
|
||
#[inline]
|
||
fn default_max_relative() -> Self::Epsilon {
|
||
N::default_max_relative()
|
||
}
|
||
|
||
#[inline]
|
||
fn default_max_ulps() -> u32 {
|
||
N::default_max_ulps()
|
||
}
|
||
|
||
#[inline]
|
||
fn relative_eq(&self, other: &Self, epsilon: Self::Epsilon, max_relative: Self::Epsilon) -> bool {
|
||
self.relative_eq(other, epsilon, max_relative)
|
||
}
|
||
|
||
#[inline]
|
||
fn ulps_eq(&self, other: &Self, epsilon: Self::Epsilon, max_ulps: u32) -> bool {
|
||
assert!(self.shape() == other.shape());
|
||
self.iter().zip(other.iter()).all(|(a, b)| a.ulps_eq(b, epsilon, max_ulps))
|
||
}
|
||
}
|
||
|
||
impl<N, R: Dim, C: Dim, S> PartialOrd for Matrix<N, R, C, S>
|
||
where N: Scalar + PartialOrd,
|
||
S: Storage<N, R, C,> {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
|
||
assert!(self.shape() == other.shape(), "Matrix comparison error: dimensions mismatch.");
|
||
|
||
let first_ord = unsafe { self.data.get_unchecked_linear(0).partial_cmp(other.data.get_unchecked_linear(0)) };
|
||
|
||
if let Some(mut first_ord) = first_ord {
|
||
let mut it = self.iter().zip(other.iter());
|
||
let _ = it.next(); // Drop the first elements (we already tested it).
|
||
|
||
for (left, right) in it {
|
||
if let Some(ord) = left.partial_cmp(right) {
|
||
match ord {
|
||
Ordering::Equal => { /* Does not change anything. */},
|
||
Ordering::Less => {
|
||
if first_ord == Ordering::Greater {
|
||
return None;
|
||
}
|
||
first_ord = ord
|
||
},
|
||
Ordering::Greater => {
|
||
if first_ord == Ordering::Less {
|
||
return None;
|
||
}
|
||
first_ord = ord
|
||
},
|
||
}
|
||
}
|
||
else {
|
||
return None
|
||
}
|
||
}
|
||
}
|
||
|
||
None
|
||
}
|
||
|
||
#[inline]
|
||
fn lt(&self, right: &Self) -> bool {
|
||
assert!(self.shape() == right.shape(), "Matrix comparison error: dimensions mismatch.");
|
||
self.iter().zip(right.iter()).all(|(a, b)| a.lt(b))
|
||
}
|
||
|
||
#[inline]
|
||
fn le(&self, right: &Self) -> bool {
|
||
assert!(self.shape() == right.shape(), "Matrix comparison error: dimensions mismatch.");
|
||
self.iter().zip(right.iter()).all(|(a, b)| a.le(b))
|
||
}
|
||
|
||
#[inline]
|
||
fn gt(&self, right: &Self) -> bool {
|
||
assert!(self.shape() == right.shape(), "Matrix comparison error: dimensions mismatch.");
|
||
self.iter().zip(right.iter()).all(|(a, b)| a.gt(b))
|
||
}
|
||
|
||
#[inline]
|
||
fn ge(&self, right: &Self) -> bool {
|
||
assert!(self.shape() == right.shape(), "Matrix comparison error: dimensions mismatch.");
|
||
self.iter().zip(right.iter()).all(|(a, b)| a.ge(b))
|
||
}
|
||
}
|
||
|
||
impl<N, R: Dim, C: Dim, S> Eq for Matrix<N, R, C, S>
|
||
where N: Scalar + Eq,
|
||
S: Storage<N, R, C> { }
|
||
|
||
impl<N, R: Dim, C: Dim, S> PartialEq for Matrix<N, R, C, S>
|
||
where N: Scalar,
|
||
S: Storage<N, R, C> {
|
||
#[inline]
|
||
fn eq(&self, right: &Matrix<N, R, C, S>) -> bool {
|
||
assert!(self.shape() == right.shape(), "Matrix equality test dimension mismatch.");
|
||
self.iter().zip(right.iter()).all(|(l, r)| l == r)
|
||
}
|
||
}
|
||
|
||
|
||
// FIXME: the bounds are much too restrictive here! This won't even work for, e.g.,
|
||
// integer-valued matrices...
|
||
impl<N, R: Dim, C: Dim, S> fmt::Display for Matrix<N, R, C, S>
|
||
where N: Real + fmt::Display,
|
||
S: Storage<N, R, C>,
|
||
S::Alloc: Allocator<usize, R, C> {
|
||
// XXX: will not always work correctly due to rounding errors.
|
||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||
fn integral_length<N: Real>(val: &N) -> usize {
|
||
let mut res = 1;
|
||
let mut curr: N = ::convert(10.0f64);
|
||
|
||
while curr <= *val {
|
||
curr = curr * ::convert(10.0f64);
|
||
res += 1;
|
||
}
|
||
|
||
if val.is_sign_negative() {
|
||
res + 1
|
||
}
|
||
else {
|
||
res
|
||
}
|
||
}
|
||
|
||
let (nrows, ncols) = self.data.shape();
|
||
let mut max_decimal_length = 0;
|
||
let mut decimal_lengths: MatrixWithScalar<N, usize, R, C, S> =
|
||
Matrix::from_element_generic(nrows, ncols, 0);
|
||
let (nrows, ncols) = self.shape();
|
||
|
||
for i in 0 .. nrows {
|
||
for j in 0 .. ncols {
|
||
decimal_lengths[(i, j)] = integral_length(&self[(i, j)]);
|
||
max_decimal_length = ::max(max_decimal_length, decimal_lengths[(i, j)]);
|
||
}
|
||
}
|
||
|
||
let precision = f.precision().unwrap_or(3);
|
||
let max_number_length = max_decimal_length + precision + 1;
|
||
|
||
try!(writeln!(f, " ┌ {:>width$} ┐", "", width = max_number_length * ncols + ncols - 1));
|
||
|
||
for i in 0 .. nrows {
|
||
try!(write!(f, " │"));
|
||
for j in 0 .. ncols {
|
||
let number_length = decimal_lengths[(i, j)] + precision + 1;
|
||
let pad = max_number_length - number_length;
|
||
try!(write!(f, " {:>thepad$}", "", thepad = pad));
|
||
try!(write!(f, "{:.*}", precision, (*self)[(i, j)]));
|
||
}
|
||
try!(writeln!(f, " │"));
|
||
}
|
||
|
||
writeln!(f, " └ {:>width$} ┘", "", width = max_number_length * ncols + ncols - 1)
|
||
}
|
||
}
|
||
|
||
|
||
impl<N, R: Dim, C: Dim, S> Matrix<N, R, C, S>
|
||
where N: Scalar + Ring,
|
||
S: Storage<N, R, C> {
|
||
/// The dot product between two matrices (seen as vectors).
|
||
#[inline]
|
||
pub fn dot<R2: Dim, C2: Dim, SB>(&self, other: &Matrix<N, R2, C2, SB>) -> N
|
||
where SB: Storage<N, R2, C2>,
|
||
ShapeConstraint: SameNumberOfRows<R, R2> + SameNumberOfColumns<C, C2> {
|
||
assert!(self.shape() == other.shape(), "Dot product dimension mismatch.");
|
||
self.iter().zip(other.iter()).fold(N::zero(), |acc, (a, b)| acc + *a * *b)
|
||
}
|
||
|
||
// FIXME: we could specialize this for when we only have vectors in which case we can just use
|
||
// `iter().zip(iter())` as for the regular `.dot` method.
|
||
/// The dot product between the transpose of `self` and `other`.
|
||
#[inline]
|
||
pub fn tr_dot<R2: Dim, C2: Dim, SB>(&self, other: &Matrix<N, R2, C2, SB>) -> N
|
||
where SB: Storage<N, R2, C2>,
|
||
ShapeConstraint: SameNumberOfRows<C, R2> + SameNumberOfColumns<R, C2> {
|
||
let (nrows, ncols) = self.shape();
|
||
assert!((ncols, nrows) == other.shape(), "Dot product dimension mismatch.");
|
||
|
||
let mut res = N::zero();
|
||
|
||
for i in 0 .. nrows {
|
||
for j in 0 .. ncols {
|
||
unsafe {
|
||
res += *self.get_unchecked(i, j) * *other.get_unchecked(j, i);
|
||
}
|
||
}
|
||
}
|
||
|
||
res
|
||
}
|
||
|
||
|
||
/// The squared L2 norm of this matrix.
|
||
#[inline]
|
||
pub fn norm_squared(&self) -> N {
|
||
self.dot(self)
|
||
}
|
||
|
||
/// The perpendicular product between two 2D column vectors, i.e. `a.x * b.y - a.y * b.x`.
|
||
#[inline]
|
||
pub fn perp<R2, C2, SB>(&self, b: &Matrix<N, R2, C2, SB>) -> N
|
||
where R2: Dim, C2: Dim,
|
||
SB: Storage<N, R2, C2>,
|
||
ShapeConstraint: SameNumberOfRows<R, U2> +
|
||
SameNumberOfColumns<C, U1> +
|
||
SameNumberOfRows<R2, U2> +
|
||
SameNumberOfColumns<C2, U1> {
|
||
assert!(self.shape() == (2, 1), "2D perpendicular product ");
|
||
|
||
unsafe {
|
||
*self.get_unchecked(0, 0) * *b.get_unchecked(1, 0) -
|
||
*self.get_unchecked(1, 0) * *b.get_unchecked(0, 0)
|
||
}
|
||
}
|
||
|
||
// FIXME: use specialization instead of an assertion.
|
||
/// The 3D cross product between two vectors.
|
||
///
|
||
/// Panics if the shape is not 3D vector. In the future, this will be implemented only for
|
||
/// dynamically-sized matrices and statically-sized 3D matrices.
|
||
#[inline]
|
||
pub fn cross<R2, C2, SB>(&self, b: &Matrix<N, R2, C2, SB>) -> MatrixCross<N, R, C, R2, C2, S>
|
||
where R2: Dim, C2: Dim,
|
||
SB: Storage<N, R2, C2>,
|
||
S::Alloc: SameShapeAllocator<N, R, C, R2, C2, S>,
|
||
ShapeConstraint: SameNumberOfRows<R, R2> + SameNumberOfColumns<C, C2> {
|
||
let shape = self.shape();
|
||
assert!(shape == b.shape(), "Vector cross product dimension mismatch.");
|
||
assert!((shape.0 == 3 && shape.1 == 1) || (shape.0 == 1 && shape.1 == 3),
|
||
"Vector cross product dimension mismatch.");
|
||
|
||
if shape.0 == 3 {
|
||
unsafe {
|
||
// FIXME: soooo ugly!
|
||
let nrows = SameShapeR::<R, R2>::from_usize(3);
|
||
let ncols = SameShapeC::<C, C2>::from_usize(1);
|
||
let mut res = Matrix::new_uninitialized_generic(nrows, ncols);
|
||
|
||
let ax = *self.get_unchecked(0, 0);
|
||
let ay = *self.get_unchecked(1, 0);
|
||
let az = *self.get_unchecked(2, 0);
|
||
|
||
let bx = *b.get_unchecked(0, 0);
|
||
let by = *b.get_unchecked(1, 0);
|
||
let bz = *b.get_unchecked(2, 0);
|
||
|
||
*res.get_unchecked_mut(0, 0) = ay * bz - az * by;
|
||
*res.get_unchecked_mut(1, 0) = az * bx - ax * bz;
|
||
*res.get_unchecked_mut(2, 0) = ax * by - ay * bx;
|
||
|
||
res
|
||
}
|
||
}
|
||
else {
|
||
unsafe {
|
||
// FIXME: soooo ugly!
|
||
let nrows = SameShapeR::<R, R2>::from_usize(1);
|
||
let ncols = SameShapeC::<C, C2>::from_usize(3);
|
||
let mut res = Matrix::new_uninitialized_generic(nrows, ncols);
|
||
|
||
let ax = *self.get_unchecked(0, 0);
|
||
let ay = *self.get_unchecked(0, 1);
|
||
let az = *self.get_unchecked(0, 2);
|
||
|
||
let bx = *b.get_unchecked(0, 0);
|
||
let by = *b.get_unchecked(0, 1);
|
||
let bz = *b.get_unchecked(0, 2);
|
||
|
||
*res.get_unchecked_mut(0, 0) = ay * bz - az * by;
|
||
*res.get_unchecked_mut(0, 1) = az * bx - ax * bz;
|
||
*res.get_unchecked_mut(0, 2) = az * bx - ax * bz;
|
||
|
||
res
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
impl<N, R: Dim, C: Dim, S> Matrix<N, R, C, S>
|
||
where N: Real,
|
||
S: Storage<N, R, C> {
|
||
/// The smallest angle between two matrices seen as vectors.
|
||
#[inline]
|
||
pub fn angle<R2: Dim, C2: Dim, SB>(&self, other: &Matrix<N, R2, C2, SB>) -> N
|
||
where SB: Storage<N, R2, C2>,
|
||
ShapeConstraint: SameNumberOfRows<R, R2> + SameNumberOfColumns<C, C2> {
|
||
let prod = self.dot(other);
|
||
let n1 = self.norm();
|
||
let n2 = other.norm();
|
||
|
||
if n1.is_zero() || n2.is_zero() {
|
||
N::zero()
|
||
}
|
||
else {
|
||
let cang = prod / (n1 * n2);
|
||
|
||
if cang > N::one() {
|
||
N::zero()
|
||
}
|
||
else if cang < -N::one() {
|
||
N::pi()
|
||
}
|
||
else {
|
||
cang.acos()
|
||
}
|
||
}
|
||
}
|
||
|
||
/// The L2 norm of this matrix.
|
||
#[inline]
|
||
pub fn norm(&self) -> N {
|
||
self.norm_squared().sqrt()
|
||
}
|
||
|
||
/// Returns a normalized version of this matrix.
|
||
#[inline]
|
||
pub fn normalize(&self) -> OwnedMatrix<N, R, C, S::Alloc> {
|
||
self / self.norm()
|
||
}
|
||
|
||
/// Returns a normalized version of this matrix unless its norm as smaller or equal to `eps`.
|
||
#[inline]
|
||
pub fn try_normalize(&self, min_norm: N) -> Option<OwnedMatrix<N, R, C, S::Alloc>> {
|
||
let n = self.norm();
|
||
|
||
if n <= min_norm {
|
||
None
|
||
}
|
||
else {
|
||
Some(self / n)
|
||
}
|
||
}
|
||
}
|
||
|
||
impl<N, R: Dim, C: Dim, S> Matrix<N, R, C, S>
|
||
where N: Real,
|
||
S: StorageMut<N, R, C> {
|
||
/// Normalizes this matrix in-place and returns its norm.
|
||
#[inline]
|
||
pub fn normalize_mut(&mut self) -> N {
|
||
let n = self.norm();
|
||
*self /= n;
|
||
|
||
n
|
||
}
|
||
|
||
/// Normalizes this matrix in-place or does nothing if its norm is smaller or equal to `eps`.
|
||
///
|
||
/// If the normalization succeded, returns the old normal of this matrix.
|
||
#[inline]
|
||
pub fn try_normalize_mut(&mut self, min_norm: N) -> Option<N> {
|
||
let n = self.norm();
|
||
|
||
if n <= min_norm {
|
||
None
|
||
}
|
||
else {
|
||
*self /= n;
|
||
Some(n)
|
||
}
|
||
}
|
||
}
|
||
|
||
impl<N, R: Dim, C: Dim, S> ApproxEq for Unit<Matrix<N, R, C, S>>
|
||
where N: Scalar + ApproxEq,
|
||
S: Storage<N, R, C>,
|
||
N::Epsilon: Copy {
|
||
type Epsilon = N::Epsilon;
|
||
|
||
#[inline]
|
||
fn default_epsilon() -> Self::Epsilon {
|
||
N::default_epsilon()
|
||
}
|
||
|
||
#[inline]
|
||
fn default_max_relative() -> Self::Epsilon {
|
||
N::default_max_relative()
|
||
}
|
||
|
||
#[inline]
|
||
fn default_max_ulps() -> u32 {
|
||
N::default_max_ulps()
|
||
}
|
||
|
||
#[inline]
|
||
fn relative_eq(&self, other: &Self, epsilon: Self::Epsilon, max_relative: Self::Epsilon) -> bool {
|
||
self.as_ref().relative_eq(other.as_ref(), epsilon, max_relative)
|
||
}
|
||
|
||
#[inline]
|
||
fn ulps_eq(&self, other: &Self, epsilon: Self::Epsilon, max_ulps: u32) -> bool {
|
||
self.as_ref().ulps_eq(other.as_ref(), epsilon, max_ulps)
|
||
}
|
||
}
|