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Support full anchors in outline shapes

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This commit is contained in:
Bán Dénes 2021-07-18 16:03:45 +02:00
parent 677fae0072
commit 26128f8db7
5 changed files with 68 additions and 50 deletions
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25
src/anchor.js
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@ -2,12 +2,23 @@ const u = require('./utils')
const a = require('./assert')
const Point = require('./point')
const anchor = module.exports = (raw, name, points={}, check_unexpected=true, default_point=new Point()) => units => {
const mirror_ref = exports.mirror = (ref, mirror) => {
if (mirror) {
if (ref.startsWith('mirror_')) {
return ref.substring(7)
} else {
return 'mirror_' + ref
}
}
return ref
}
const anchor = exports.parse = (raw, name, points={}, check_unexpected=true, default_point=new Point(), mirror=false) => units => {
if (a.type(raw)() == 'array') {
// recursive call with incremental default_point mods, according to `affect`s
let current = default_point.clone()
for (const step of raw) {
current = anchor(step, name, points, check_unexpected, current)(units)
current = anchor(step, name, points, check_unexpected, current, mirror)(units)
}
return current
}
@ -19,16 +30,18 @@ const anchor = module.exports = (raw, name, points={}, check_unexpected=true, de
let x = 0, y = 0, r = 0
const len = raw.ref.length
for (const ref of raw.ref) {
a.assert(points[ref], `Unknown point reference "${ref}" in anchor "${name}"!`)
const resolved = points[ref]
const parsed_ref = mirror_ref(ref, mirror)
a.assert(points[parsed_ref], `Unknown point reference "${parsed_ref}" in anchor "${name}"!`)
const resolved = points[parsed_ref]
x += resolved.x
y += resolved.y
r += resolved.r
}
point = new Point(x / len, y / len, r / len)
} else {
a.assert(points[raw.ref], `Unknown point reference "${raw.ref}" in anchor "${name}"!`)
point = points[raw.ref].clone()
const parsed_ref = mirror_ref(raw.ref, mirror)
a.assert(points[parsed_ref], `Unknown point reference "${parsed_ref}" in anchor "${name}"!`)
point = points[parsed_ref].clone()
}
}
if (raw.orient !== undefined) {