Type Alias nalgebra::base::UninitMatrix

pub type UninitMatrix<T, R, C> = Matrix<MaybeUninit<T>, R, C, OwnedUninit<T, R, C>>;

An owned matrix with uninitialized data.

Aliased Type

struct UninitMatrix<T, R, C> {
    pub data: <DefaultAllocator as Allocator<R, C>>::BufferUninit<T>,
    /* private fields */
}

Fields

data: <DefaultAllocator as Allocator<R, C>>::BufferUninit<T>

The data storage that contains all the matrix components. Disappointed?

Well, if you came here to see how you can access the matrix components, you may be in luck: you can access the individual components of all vectors with compile-time dimensions <= 6 using field notation like this: vec.x, vec.y, vec.z, vec.w, vec.a, vec.b. Reference and assignation work too:

let mut vec = Vector3::new(1.0, 2.0, 3.0);
vec.x = 10.0;
vec.y += 30.0;
assert_eq!(vec.x, 10.0);
assert_eq!(vec.y + 100.0, 132.0);

Similarly, for matrices with compile-time dimensions <= 6, you can use field notation like this: mat.m11, mat.m42, etc. The first digit identifies the row to address and the second digit identifies the column to address. So mat.m13 identifies the component at the first row and third column (note that the count of rows and columns start at 1 instead of 0 here. This is so we match the mathematical notation).

For all matrices and vectors, independently from their size, individual components can be accessed and modified using indexing: vec[20], mat[(20, 19)]. Here the indexing starts at 0 as you would expect.

Implementations

impl<T: Scalar, R: Dim, C: Dim> UninitMatrix<T, R, C>

where DefaultAllocator: Allocator<R, C>,

pub fn uninit(nrows: R, ncols: C) -> Self

Builds a matrix with uninitialized elements of type MaybeUninit<T>.

impl<T: Scalar, R: Dim, C: Dim> UninitMatrix<T, R, C>

where DefaultAllocator: Allocator<R, C>,

pub unsafe fn assume_init(self) -> OMatrix<T, R, C>

Assumes a matrix’s entries to be initialized. This operation should be near zero-cost.

Safety

The user must make sure that every single entry of the buffer has been initialized, or Undefined Behavior will immediately occur.