2. Swizzling

2. Swizzling

Shader languages like GLSL often feature so-called swizzle expressions, which may be used to freely select and arrange a vector's components. For example, variable.x, variable.xzy and variable.zxyy respectively form a scalar, a 3D vector and a 4D vector. The result of a swizzle expression in GLSL can be either an R-value or an L-value. Swizzle expressions can be written with characters from exactly one of xyzw.

val A = Vec2()
var B = Vec2()

B.yx = A.wy
B = A.xx

Java

Vec2 A = Vec2();
Vec2 B = Vec2();

B.yx(A.wy)
B = (Vec2) A.xx()

There are also alias available, such as rgba and stpq, but not swizzling on them yet at the moment.