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Swizzling (computer graphics)

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In computer graphics, swizzles are a class of operations that transform vectors by rearranging components.[1] Swizzles can also project from a vector of one dimensionality to a vector of another dimensionality, such as taking a three-dimensional vector and creating a two-dimensional or five-dimensional vector using components from the original vector.[2] For example, if A = {1,2,3,4}, where the components are x, y, z, and w respectively, you could compute B = A.wwxy, whereupon B would equal {4,4,1,2}. Additionally, one could create a two-dimensional vector with A.wx or a five-dimensional vector with A.xyzwx. Combining vectors and swizzling can be employed in various ways. This is common in GPGPU applications[example needed].

In terms of linear algebra, this is equivalent to multiplying by a matrix whose rows are standard basis vectors. If , then swizzling as above looks like

See also[edit]

Z-order curve


  1. ^ Lawlor, Orion. "OpenGL ARB_fragment_program Quick Reference ("Cheat Sheet")". University of Alaska Fairbanks. Retrieved 21 January 2014.
  2. ^ "Vec3Swizzles". glam. Retrieved 29 March 2023.

External links[edit]