Returns a vector representing the anchor coordinates relative to the object's half-width, half-height, and center.
For example: `anchorToVec2("right")` returns `vec2(1, 0)`, which means
the anchor is fully to the right horizontally (1), and in-line with the
centerpoint vertically (0).
Or, `anchorToVec2("botleft")` returns `vec2(-1, 1)`, which means fully to the
left (-1), and fully to the bottom (1).
sincev4000.0
groupMath
subgroupVectors