A vector is a data structure that holds 2, 3, or 4 numbers. It is commonly used to refer to positions and rotations of things.
Swizzling
Swizzling refers to changing components of vectors by re-arranging the values already present.
To perform a swizzling operation, index the vector with between 2 and 4 x, y, z, w, or _ characters.
A new vector will be formed from the components specified (i.e. v.xxxx will create a new vector from the x component of v repeated 4 times.) The _ component will fill in a value of 0 in any position where it is specified.
For example, if v is a Vector4, the following are all valid and return a new Vector4:
v.xyzwv.xxzzv.wzyxv.wyxyv.___x
Swizzling operations can also transform vectors between sizes.
For example, to create a Vector2 from a Vector3's x and y components, use v3.xy.
This works in both directions – a common action is upgrading a Vector2 to a Vector3 by adding a 0 as the Z component:
local vec2 = vec(1, 2)
print(vec2) -- {1, 2}
local vec3 = vec2.xy_ -- or .x_y, ._xy, ...
print(vec3) -- {1, 2, 0}
Methods
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Operators
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