DriftEngine

The 2D layer · type

Affine2D

Six numbers, laid out the way a 2D graphics API has laid them out for thirty years:

Explained in Sprites and tilemaps.

type Affine2D = Float32Array
import type { Affine2D } from '@driftengine/ui2d';

In depth

ndc.x = m[0] * x + m[2] * y + m[4]
ndc.y = m[1] * x + m[3] * y + m[5]

A Float32Array rather than six fields because it is uploaded as two vec4s and read by the vertex stage every frame; an object would be repacked on the way.