# Vectors

Vectors - where possible - based on underlying hardware vector implementations. A vector is similar to an array, but with additional functionality. The restriction is that a vector may only consist of elements that are numerical types, boolean or pointers.

A vector is declared similar to an array but uses `[<>]` rather than `[]`, e.g. `int[<4>]`.

## Arithmetics on vectors

Vectors support all arithmetics and other operations supported by its underlying type. The operations are always performed elementwise.

``````int[<2>] a = { 23, 11 };
int[<2>] b = { 2, 1 };
int[<2>] c = a * b;     // c = { 46, 11 }
``````

For integer and boolean types, bit operations such as `^ | & << >>` are available, and for pointers, pointer arithmetic is supported.

### Scalar values

Scalar values will implicitly widen to vectors when used with vectors:

``````int[<2>] d = { 21, 14 };
int[<2>] e = d / 7;      // e = { 3, 2 }
int[<2>] f = 4;          // f = { 4, 4 }
``````

The `std::math` module contains a wealth of additional operations available on vectors using dot-method syntax:

• `.sum()` - sum all vector elements.
• `.product()` - multiply all vector elements.
• `.max()` - get the maximum element.
• `.min()` - get the minimum element.
• `.dot(other)` - return the dot product with the other vector.
• `.length(other)` - return the square root of the dot product.
• `.distance(other)` - return the length of the difference of the two vectors.
• `.normalize()` - return a normalized vector.
• `.comp_lt(other)` - return a boolean vector with a component wise "<"
• `.comp_le(other)` - return a boolean vector with a component wise "<="
• `.comp_eq(other)` - return a boolean vector with a component wise "=="
• `.comp_gt(other)` - return a boolean vector with a component wise ">"
• `.comp_ge(other)` - return a boolean vector with a component wise ">="
• `.comp_ne(other)` - return a boolean vector with a component wise "!="

Dot methods available for scalar values, such as `ceil`, `fma` etc are in general also available for vectors.

## Swizzling

Swizzling using dot notation is supported, using x, y, z, w:

``````int[<3>] a = { 11, 22, 33 };
int[<4>] b = a.xxzx;         // b = { 11, 11, 33, 11 }
int c = b.w;                 // c = 11;
``````

## Array-like operations

Like arrays, it's possible to make slices and iterate over vectors. It should be noted that the storage alignment of vectors are often different from arrays, which should be taken into account when storing them in vectors.