Operations

Operations change or query geometry. They do not draw fill marks — they prepare regions and paths you later stroke or fill.

Typical pipeline: construct → operate → fill → SVG.

Transforms

Affine helpers live in transformation:

• rotate / rotateAroundCenter
• translate, scale, shear
• flipHorizontal / flipVertical

import { createRect, rotateAroundCenter } from 'pattapatta'

const square = createRect(20, 20, 40, 40)
const spun = rotateAroundCenter(square, Math.PI / 6)

Region ops

Before a fill, you usually reshape the host region:

Module	Role
shapeBoolean	Union, intersect, subtract, occlusion
morphology	Buffer, simplify, warp
processing	Slice, densify, extract boundaries
predicates	Containment, area, and related queries

Next step

Once you have a path or group, add stroke marks with Fills (hatch, packing, tiling, …).