penpot-exporter-figma-plugin/plugin-src/translators/translateRotation.ts

import { ShapeBaseAttributes } from '@ui/lib/types/shapes/shape';

export const translateRotation = (
  transform: Transform,
  rotation: number
): Pick<ShapeBaseAttributes, 'transform' | 'transformInverse' | 'rotation'> => ({
  rotation: -rotation < 0 ? -rotation + 360 : -rotation,
  transform: {
    a: transform[0][0],
    b: transform[1][0],
    c: transform[0][1],
    d: transform[1][1],
    e: 0,
    f: 0
  },
  transformInverse: {
    a: transform[0][0],
    b: transform[0][1],
    c: transform[1][0],
    d: transform[1][1],
    e: 0,
    f: 0
  }
});

export const translateZeroRotation = (): Pick<
  ShapeBaseAttributes,
  'transform' | 'transformInverse' | 'rotation'
> => ({
  rotation: 0,
  transform: undefined,
  transformInverse: undefined
});