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Simplify the construction of DVector. 

Fix #377.
This commit is contained in:
sebcrozet 2018-12-09 11:22:21 +01:00
parent 660b868603
commit 01d1f9d24b
4 changed files with 148 additions and 109 deletions
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36
src/base/alias_slice.rs
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@ -175,24 +175,24 @@ pub type MatrixSliceXx6<'a, N, RStride = U1, CStride = Dynamic> =
MatrixSliceMN<'a, N, Dynamic, U6, RStride, CStride>; MatrixSliceMN<'a, N, Dynamic, U6, RStride, CStride>;
/// A column vector slice with `D` rows. /// A column vector slice with `D` rows.
pub type VectorSliceN<'a, N, D, Stride = U1> = pub type VectorSliceN<'a, N, D, RStride = U1, CStride = D> =
Matrix<N, D, U1, SliceStorage<'a, N, D, U1, Stride, D>>; Matrix<N, D, U1, SliceStorage<'a, N, D, U1, RStride, CStride>>;
/// A column vector slice dynamic numbers of rows and columns. /// A column vector slice dynamic numbers of rows and columns.
pub type DVectorSlice<'a, N, Stride = U1> = VectorSliceN<'a, N, Dynamic, Stride>; pub type DVectorSlice<'a, N, RStride = U1, CStride = Dynamic> = VectorSliceN<'a, N, Dynamic, RStride, CStride>;
/// A 1D column vector slice. /// A 1D column vector slice.
pub type VectorSlice1<'a, N, Stride = U1> = VectorSliceN<'a, N, U1, Stride>; pub type VectorSlice1<'a, N, RStride = U1, CStride = U1> = VectorSliceN<'a, N, U1, RStride, CStride>;
/// A 2D column vector slice. /// A 2D column vector slice.
pub type VectorSlice2<'a, N, Stride = U1> = VectorSliceN<'a, N, U2, Stride>; pub type VectorSlice2<'a, N, RStride = U1, CStride = U2> = VectorSliceN<'a, N, U2, RStride, CStride>;
/// A 3D column vector slice. /// A 3D column vector slice.
pub type VectorSlice3<'a, N, Stride = U1> = VectorSliceN<'a, N, U3, Stride>; pub type VectorSlice3<'a, N, RStride = U1, CStride = U3> = VectorSliceN<'a, N, U3, RStride, CStride>;
/// A 4D column vector slice. /// A 4D column vector slice.
pub type VectorSlice4<'a, N, Stride = U1> = VectorSliceN<'a, N, U4, Stride>; pub type VectorSlice4<'a, N, RStride = U1, CStride = U4> = VectorSliceN<'a, N, U4, RStride, CStride>;
/// A 5D column vector slice. /// A 5D column vector slice.
pub type VectorSlice5<'a, N, Stride = U1> = VectorSliceN<'a, N, U5, Stride>; pub type VectorSlice5<'a, N, RStride = U1, CStride = U5> = VectorSliceN<'a, N, U5, RStride, CStride>;
/// A 6D column vector slice. /// A 6D column vector slice.
pub type VectorSlice6<'a, N, Stride = U1> = VectorSliceN<'a, N, U6, Stride>; pub type VectorSlice6<'a, N, RStride = U1, CStride = U6> = VectorSliceN<'a, N, U6, RStride, CStride>;
/* /*
* *
@ -367,21 +367,21 @@ pub type MatrixSliceMutXx6<'a, N, RStride = U1, CStride = Dynamic> =
MatrixSliceMutMN<'a, N, Dynamic, U6, RStride, CStride>; MatrixSliceMutMN<'a, N, Dynamic, U6, RStride, CStride>;
/// A mutable column vector slice with `D` rows. /// A mutable column vector slice with `D` rows.
pub type VectorSliceMutN<'a, N, D, Stride = U1> = pub type VectorSliceMutN<'a, N, D, RStride = U1, CStride = D> =
Matrix<N, D, U1, SliceStorageMut<'a, N, D, U1, Stride, D>>; Matrix<N, D, U1, SliceStorageMut<'a, N, D, U1, RStride, CStride>>;
/// A mutable column vector slice dynamic numbers of rows and columns. /// A mutable column vector slice dynamic numbers of rows and columns.
pub type DVectorSliceMut<'a, N, Stride = U1> = VectorSliceMutN<'a, N, Dynamic, Stride>; pub type DVectorSliceMut<'a, N, RStride = U1, CStride = Dynamic> = VectorSliceMutN<'a, N, Dynamic, RStride, CStride>;
/// A 1D mutable column vector slice. /// A 1D mutable column vector slice.
pub type VectorSliceMut1<'a, N, Stride = U1> = VectorSliceMutN<'a, N, U1, Stride>; pub type VectorSliceMut1<'a, N, RStride = U1, CStride = U1> = VectorSliceMutN<'a, N, U1, RStride, CStride>;
/// A 2D mutable column vector slice. /// A 2D mutable column vector slice.
pub type VectorSliceMut2<'a, N, Stride = U1> = VectorSliceMutN<'a, N, U2, Stride>; pub type VectorSliceMut2<'a, N, RStride = U1, CStride = U2> = VectorSliceMutN<'a, N, U2, RStride, CStride>;
/// A 3D mutable column vector slice. /// A 3D mutable column vector slice.
pub type VectorSliceMut3<'a, N, Stride = U1> = VectorSliceMutN<'a, N, U3, Stride>; pub type VectorSliceMut3<'a, N, RStride = U1, CStride = U3> = VectorSliceMutN<'a, N, U3, RStride, CStride>;
/// A 4D mutable column vector slice. /// A 4D mutable column vector slice.
pub type VectorSliceMut4<'a, N, Stride = U1> = VectorSliceMutN<'a, N, U4, Stride>; pub type VectorSliceMut4<'a, N, RStride = U1, CStride = U4> = VectorSliceMutN<'a, N, U4, RStride, CStride>;
/// A 5D mutable column vector slice. /// A 5D mutable column vector slice.
pub type VectorSliceMut5<'a, N, Stride = U1> = VectorSliceMutN<'a, N, U5, Stride>; pub type VectorSliceMut5<'a, N, RStride = U1, CStride = U5> = VectorSliceMutN<'a, N, U5, RStride, CStride>;
/// A 6D mutable column vector slice. /// A 6D mutable column vector slice.
pub type VectorSliceMut6<'a, N, Stride = U1> = VectorSliceMutN<'a, N, U6, Stride>; pub type VectorSliceMut6<'a, N, RStride = U1, CStride = U6> = VectorSliceMutN<'a, N, U6, RStride, CStride>;

202
src/base/construction.rs
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@ -444,63 +444,6 @@ macro_rules! impl_constructors(
Self::from_iterator_generic($($gargs, )* iter) Self::from_iterator_generic($($gargs, )* iter)
} }
/// Creates a matrix with its elements filled with the components provided by a slice
/// in row-major order.
///
/// The order of elements in the slice must follow the usual mathematic writing, i.e.,
/// row-by-row.
///
/// # Example
/// ```
/// # use nalgebra::{Matrix2x3, Vector3, DVector, DMatrix};
/// # use std::iter;
///
/// let v = Vector3::from_row_slice(&[0, 1, 2]);
/// // The additional argument represents the vector dimension.
/// let dv = DVector::from_row_slice(3, &[0, 1, 2]);
/// let m = Matrix2x3::from_row_slice(&[0, 1, 2, 3, 4, 5]);
/// // The two additional arguments represent the matrix dimensions.
/// let dm = DMatrix::from_row_slice(2, 3, &[0, 1, 2, 3, 4, 5]);
///
/// assert!(v.x == 0 && v.y == 1 && v.z == 2);
/// assert!(dv[0] == 0 && dv[1] == 1 && dv[2] == 2);
/// assert!(m.m11 == 0 && m.m12 == 1 && m.m13 == 2 &&
/// m.m21 == 3 && m.m22 == 4 && m.m23 == 5);
/// assert!(dm[(0, 0)] == 0 && dm[(0, 1)] == 1 && dm[(0, 2)] == 2 &&
/// dm[(1, 0)] == 3 && dm[(1, 1)] == 4 && dm[(1, 2)] == 5);
/// ```
#[inline]
pub fn from_row_slice($($args: usize,)* slice: &[N]) -> Self {
Self::from_row_slice_generic($($gargs, )* slice)
}
/// Creates a matrix with its elements filled with the components provided by a slice
/// in column-major order.
///
/// # Example
/// ```
/// # use nalgebra::{Matrix2x3, Vector3, DVector, DMatrix};
/// # use std::iter;
///
/// let v = Vector3::from_column_slice(&[0, 1, 2]);
/// // The additional argument represents the vector dimension.
/// let dv = DVector::from_column_slice(3, &[0, 1, 2]);
/// let m = Matrix2x3::from_column_slice(&[0, 1, 2, 3, 4, 5]);
/// // The two additional arguments represent the matrix dimensions.
/// let dm = DMatrix::from_column_slice(2, 3, &[0, 1, 2, 3, 4, 5]);
///
/// assert!(v.x == 0 && v.y == 1 && v.z == 2);
/// assert!(dv[0] == 0 && dv[1] == 1 && dv[2] == 2);
/// assert!(m.m11 == 0 && m.m12 == 2 && m.m13 == 4 &&
/// m.m21 == 1 && m.m22 == 3 && m.m23 == 5);
/// assert!(dm[(0, 0)] == 0 && dm[(0, 1)] == 2 && dm[(0, 2)] == 4 &&
/// dm[(1, 0)] == 1 && dm[(1, 1)] == 3 && dm[(1, 2)] == 5);
/// ```
#[inline]
pub fn from_column_slice($($args: usize,)* slice: &[N]) -> Self {
Self::from_column_slice_generic($($gargs, )* slice)
}
/// Creates a matrix or vector filled with the results of a function applied to each of its /// Creates a matrix or vector filled with the results of a function applied to each of its
/// component coordinates. /// component coordinates.
/// ///
@ -612,32 +555,6 @@ macro_rules! impl_constructors(
) -> Self { ) -> Self {
Self::from_distribution_generic($($gargs, )* distribution, rng) Self::from_distribution_generic($($gargs, )* distribution, rng)
} }
/// Creates a matrix backed by a given `Vec`.
///
/// The output matrix is filled column-by-column.
///
/// # Example
/// ```
/// # use nalgebra::{DMatrix, Matrix2x3};
///
/// let m = Matrix2x3::from_vec(vec![0, 1, 2, 3, 4, 5]);
///
/// assert!(m.m11 == 0 && m.m12 == 2 && m.m13 == 4 &&
/// m.m21 == 1 && m.m22 == 3 && m.m23 == 5);
///
///
/// // The two additional arguments represent the matrix dimensions.
/// let dm = DMatrix::from_vec(2, 3, vec![0, 1, 2, 3, 4, 5]);
///
/// assert!(dm[(0, 0)] == 0 && dm[(0, 1)] == 2 && dm[(0, 2)] == 4 &&
/// dm[(1, 0)] == 1 && dm[(1, 1)] == 3 && dm[(1, 2)] == 5);
/// ```
#[inline]
#[cfg(feature = "std")]
pub fn from_vec($($args: usize,)* data: Vec<N>) -> Self {
Self::from_vec_generic($($gargs, )* data)
}
} }
impl<N: Scalar, $($DimIdent: $DimBound, )*> MatrixMN<N $(, $Dims)*> impl<N: Scalar, $($DimIdent: $DimBound, )*> MatrixMN<N $(, $Dims)*>
@ -676,6 +593,125 @@ impl_constructors!(Dynamic, Dynamic;
Dynamic::new(nrows), Dynamic::new(ncols); Dynamic::new(nrows), Dynamic::new(ncols);
nrows, ncols); nrows, ncols);
/*
*
* Constructors that don't necessarily require all dimensions
* to be specified whon one dimension is already known.
*
*/
macro_rules! impl_constructors_from_data(
($data: ident; $($Dims: ty),*; $(=> $DimIdent: ident: $DimBound: ident),*; $($gargs: expr),*; $($args: ident),*) => {
impl<N: Scalar, $($DimIdent: $DimBound, )*> MatrixMN<N $(, $Dims)*>
where DefaultAllocator: Allocator<N $(, $Dims)*> {
/// Creates a matrix with its elements filled with the components provided by a slice
/// in row-major order.
///
/// The order of elements in the slice must follow the usual mathematic writing, i.e.,
/// row-by-row.
///
/// # Example
/// ```
/// # use nalgebra::{Matrix2x3, Vector3, DVector, DMatrix};
/// # use std::iter;
///
/// let v = Vector3::from_row_slice(&[0, 1, 2]);
/// // The additional argument represents the vector dimension.
/// let dv = DVector::from_row_slice(3, &[0, 1, 2]);
/// let m = Matrix2x3::from_row_slice(&[0, 1, 2, 3, 4, 5]);
/// // The two additional arguments represent the matrix dimensions.
/// let dm = DMatrix::from_row_slice(2, 3, &[0, 1, 2, 3, 4, 5]);
///
/// assert!(v.x == 0 && v.y == 1 && v.z == 2);
/// assert!(dv[0] == 0 && dv[1] == 1 && dv[2] == 2);
/// assert!(m.m11 == 0 && m.m12 == 1 && m.m13 == 2 &&
/// m.m21 == 3 && m.m22 == 4 && m.m23 == 5);
/// assert!(dm[(0, 0)] == 0 && dm[(0, 1)] == 1 && dm[(0, 2)] == 2 &&
/// dm[(1, 0)] == 3 && dm[(1, 1)] == 4 && dm[(1, 2)] == 5);
/// ```
#[inline]
pub fn from_row_slice($($args: usize,)* $data: &[N]) -> Self {
Self::from_row_slice_generic($($gargs, )* $data)
}
/// Creates a matrix with its elements filled with the components provided by a slice
/// in column-major order.
///
/// # Example
/// ```
/// # use nalgebra::{Matrix2x3, Vector3, DVector, DMatrix};
/// # use std::iter;
///
/// let v = Vector3::from_column_slice(&[0, 1, 2]);
/// // The additional argument represents the vector dimension.
/// let dv = DVector::from_column_slice(3, &[0, 1, 2]);
/// let m = Matrix2x3::from_column_slice(&[0, 1, 2, 3, 4, 5]);
/// // The two additional arguments represent the matrix dimensions.
/// let dm = DMatrix::from_column_slice(2, 3, &[0, 1, 2, 3, 4, 5]);
///
/// assert!(v.x == 0 && v.y == 1 && v.z == 2);
/// assert!(dv[0] == 0 && dv[1] == 1 && dv[2] == 2);
/// assert!(m.m11 == 0 && m.m12 == 2 && m.m13 == 4 &&
/// m.m21 == 1 && m.m22 == 3 && m.m23 == 5);
/// assert!(dm[(0, 0)] == 0 && dm[(0, 1)] == 2 && dm[(0, 2)] == 4 &&
/// dm[(1, 0)] == 1 && dm[(1, 1)] == 3 && dm[(1, 2)] == 5);
/// ```
#[inline]
pub fn from_column_slice($($args: usize,)* $data: &[N]) -> Self {
Self::from_column_slice_generic($($gargs, )* $data)
}
/// Creates a matrix backed by a given `Vec`.
///
/// The output matrix is filled column-by-column.
///
/// # Example
/// ```
/// # use nalgebra::{DMatrix, Matrix2x3};
///
/// let m = Matrix2x3::from_vec(vec![0, 1, 2, 3, 4, 5]);
///
/// assert!(m.m11 == 0 && m.m12 == 2 && m.m13 == 4 &&
/// m.m21 == 1 && m.m22 == 3 && m.m23 == 5);
///
///
/// // The two additional arguments represent the matrix dimensions.
/// let dm = DMatrix::from_vec(2, 3, vec![0, 1, 2, 3, 4, 5]);
///
/// assert!(dm[(0, 0)] == 0 && dm[(0, 1)] == 2 && dm[(0, 2)] == 4 &&
/// dm[(1, 0)] == 1 && dm[(1, 1)] == 3 && dm[(1, 2)] == 5);
/// ```
#[inline]
#[cfg(feature = "std")]
pub fn from_vec($($args: usize,)* $data: Vec<N>) -> Self {
Self::from_vec_generic($($gargs, )* $data)
}
}
}
);
// FIXME: this is not very pretty. We could find a better call syntax.
impl_constructors_from_data!(data; R, C; // Arguments for Matrix<N, ..., S>
=> R: DimName, => C: DimName; // Type parameters for impl<N, ..., S>
R::name(), C::name(); // Arguments for `_generic` constructors.
); // Arguments for non-generic constructors.
impl_constructors_from_data!(data; R, Dynamic;
=> R: DimName;
R::name(), Dynamic::new(data.len() / R::dim());
);
impl_constructors_from_data!(data; Dynamic, C;
=> C: DimName;
Dynamic::new(data.len() / C::dim()), C::name();
);
impl_constructors_from_data!(data; Dynamic, Dynamic;
;
Dynamic::new(nrows), Dynamic::new(ncols);
nrows, ncols);
/* /*
* *
* Zero, One, Rand traits. * Zero, One, Rand traits.

3
src/base/mod.rs
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@ -29,6 +29,8 @@ mod properties;
mod scalar; mod scalar;
mod swizzle; mod swizzle;
mod unit; mod unit;
mod statistics;
pub mod norm;
#[doc(hidden)] #[doc(hidden)]
pub mod helper; pub mod helper;
@ -36,6 +38,7 @@ pub mod helper;
pub use self::matrix::*; pub use self::matrix::*;
pub use self::scalar::*; pub use self::scalar::*;
pub use self::unit::*; pub use self::unit::*;
pub use self::norm::*;
pub use self::default_allocator::*; pub use self::default_allocator::*;
pub use self::dimension::*; pub use self::dimension::*;

16
tests/core/matrix.rs
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@ -195,10 +195,10 @@ fn from_columns() {
#[test] #[test]
fn from_columns_dynamic() { fn from_columns_dynamic() {
let columns = &[ let columns = &[
DVector::from_row_slice(3, &[11, 21, 31]), DVector::from_row_slice(&[11, 21, 31]),
DVector::from_row_slice(3, &[12, 22, 32]), DVector::from_row_slice(&[12, 22, 32]),
DVector::from_row_slice(3, &[13, 23, 33]), DVector::from_row_slice(&[13, 23, 33]),
DVector::from_row_slice(3, &[14, 24, 34]), DVector::from_row_slice(&[14, 24, 34]),
]; ];
let expected = DMatrix::from_row_slice(3, 4, &[11, 12, 13, 14, 21, 22, 23, 24, 31, 32, 33, 34]); let expected = DMatrix::from_row_slice(3, 4, &[11, 12, 13, 14, 21, 22, 23, 24, 31, 32, 33, 34]);
@ -233,8 +233,8 @@ fn from_not_enough_columns() {
#[should_panic] #[should_panic]
fn from_rows_with_different_dimensions() { fn from_rows_with_different_dimensions() {
let columns = &[ let columns = &[
DVector::from_row_slice(3, &[11, 21, 31]), DVector::from_row_slice(&[11, 21, 31]),
DVector::from_row_slice(3, &[12, 22, 32, 33]), DVector::from_row_slice(&[12, 22, 32, 33]),
]; ];
let _ = DMatrix::from_columns(columns); let _ = DMatrix::from_columns(columns);
@ -272,8 +272,8 @@ fn to_homogeneous() {
let a = Vector3::new(1.0, 2.0, 3.0); let a = Vector3::new(1.0, 2.0, 3.0);
let expected_a = Vector4::new(1.0, 2.0, 3.0, 0.0); let expected_a = Vector4::new(1.0, 2.0, 3.0, 0.0);
let b = DVector::from_row_slice(3, &[1.0, 2.0, 3.0]); let b = DVector::from_row_slice(&[1.0, 2.0, 3.0]);
let expected_b = DVector::from_row_slice(4, &[1.0, 2.0, 3.0, 0.0]); let expected_b = DVector::from_row_slice(&[1.0, 2.0, 3.0, 0.0]);
let c = Matrix2::new(1.0, 2.0, 3.0, 4.0); let c = Matrix2::new(1.0, 2.0, 3.0, 4.0);
let expected_c = Matrix3::new(1.0, 2.0, 0.0, 3.0, 4.0, 0.0, 0.0, 0.0, 1.0); let expected_c = Matrix3::new(1.0, 2.0, 0.0, 3.0, 4.0, 0.0, 0.0, 0.0, 1.0);