389 lines
No EOL
17 KiB
JavaScript
389 lines
No EOL
17 KiB
JavaScript
const m = require('makerjs')
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const u = require('./utils')
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const a = require('./assert')
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const o = require('./operation')
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const Point = require('./point')
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const prep = require('./prepare')
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const anchor_lib = require('./anchor')
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const filter = require('./filter').parse
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const binding = (base, w, h, point, units) => {
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let bind = a.trbl(point.meta.bind || 0, `${point.meta.name}.bind`)(units)
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// if it's a mirrored key, we swap the left and right bind values
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if (point.meta.mirrored) {
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bind = [bind[0], bind[3], bind[2], bind[1]]
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}
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const bt = h/2 + Math.max(bind[0], 0)
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const br = w/2 + Math.max(bind[1], 0)
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const bd = -h/2 - Math.max(bind[2], 0)
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const bl = -w/2 - Math.max(bind[3], 0)
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if (bind[0] || bind[1]) base = u.union(base, u.rect(br, bt))
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if (bind[1] || bind[2]) base = u.union(base, u.rect(br, -bd, [0, bd]))
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if (bind[2] || bind[3]) base = u.union(base, u.rect(-bl, -bd, [bl, bd]))
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if (bind[3] || bind[0]) base = u.union(base, u.rect(-bl, bt, [bl, 0]))
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return base
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}
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const rectangle = (config, name, points, units) => {
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// prepare params
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a.unexpected(config, `${name}`, ['size', 'corner', 'bevel'])
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const size = a.wh(params.size, `${export_name}.size`)(units)
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const rec_units = prep.extend({
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sx: size[0],
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sy: size[1]
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}, units)
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const corner = a.sane(params.corner || 0, `${export_name}.corner`, 'number')(rec_units)
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const bevel = a.sane(params.bevel || 0, `${export_name}.bevel`, 'number')(rec_units)
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// return shape function
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return (point, bound, mirror) => {
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const error = (dim, val) => `Rectangle for "${name}" isn't ${dim} enough for its corner and bevel (${val} - 2 * ${corner} - 2 * ${bevel} <= 0)!`
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const [w, h] = size
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const mod = 2 * (corner + bevel)
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const cw = w - mod
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a.assert(cw >= 0, error('wide', w))
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const ch = h - mod
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a.assert(ch >= 0, error('tall', h))
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let rect = new m.models.Rectangle(cw, ch)
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if (bevel) {
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rect = u.poly([
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[-bevel, 0],
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[-bevel, ch],
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[0, ch + bevel],
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[cw, ch + bevel],
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[cw + bevel, ch],
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[cw + bevel, 0],
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[cw, -bevel],
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[0, -bevel]
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])
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}
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if (corner > 0) rect = m.model.outline(rect, corner, 0)
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rect = m.model.moveRelative(res, [corner + bevel, corner + bevel])
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let normal = u.deepcopy(rect)
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if (bound) normal = binding(normal, w, h, point, rec_units)
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normal = point.position(normal)
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let mirrored
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if (mirror) {
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mirrored_name = anchor_lib.mirror(point.name)
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}
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}
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}
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// Actual layout
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let left = {models: {}}
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let right = {models: {}}
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if (['left', 'right', 'middle', 'both'].includes(side)) {
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for (const [pname, p] of Object.entries(points)) {
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// filter by tags, if necessary
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if (tags.length) {
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const source = p.meta.tags || {}
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const point_tags = Object.keys(source).filter(t => !!source[t])
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const relevant = point_tags.some(pt => tags.includes(pt))
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if (!relevant) continue
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}
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let from_x = -size[0] / 2, to_x = size[0] / 2
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let from_y = -size[1] / 2, to_y = size[1] / 2
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// the original position
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let rect = rectangle(to_x - from_x, to_y - from_y, corner, bevel, `${export_name}.size`)
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rect = m.model.moveRelative(rect, [from_x, from_y])
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// extra binding "material", if necessary
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if (bound) {
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let bind = a.trbl(p.meta.bind || 0, `${pname}.bind`)(relative_units)
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// if it's a mirrored key, we swap the left and right bind values
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if (p.meta.mirrored) {
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bind = [bind[0], bind[3], bind[2], bind[1]]
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}
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const bt = to_y + Math.max(bind[0], 0)
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const br = to_x + Math.max(bind[1], 0)
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const bd = from_y - Math.max(bind[2], 0)
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const bl = from_x - Math.max(bind[3], 0)
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if (bind[0] || bind[1]) rect = u.union(rect, u.rect(br, bt))
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if (bind[1] || bind[2]) rect = u.union(rect, u.rect(br, -bd, [0, bd]))
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if (bind[2] || bind[3]) rect = u.union(rect, u.rect(-bl, -bd, [bl, bd]))
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if (bind[3] || bind[0]) rect = u.union(rect, u.rect(-bl, bt, [bl, 0]))
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}
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// positioning and unioning the resulting shape
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rect = p.position(rect)
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if (p.meta.mirrored) {
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right = u.union(right, rect)
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} else {
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left = u.union(left, rect)
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}
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}
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}
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if (side == 'left') return left
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if (side == 'right') return right
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// allow opting out of gluing, when
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// A) there are no glue definitions, or
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// B) glue is explicitly set to false
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const glue_opt_out = (!Object.keys(parsed_glue).length || params.glue === false)
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let glue = {models: {}}
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if (bound && ['middle', 'both', 'glue'].includes(side) && !glue_opt_out) {
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const default_glue_name = Object.keys(parsed_glue)[0]
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const computed_glue_name = a.sane(params.glue || default_glue_name, `${export_name}.glue`, 'string')()
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const glue_def = parsed_glue[computed_glue_name]
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a.assert(glue_def, `Field "${export_name}.glue" does not name a valid glue!`)
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const get_line = (anchor) => {
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if (a.type(anchor)(relative_units) == 'number') {
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return u.line([anchor, -1000], [anchor, 1000])
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}
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// if it wasn't a number, then it's a (possibly relative) anchor
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const from = anchor(relative_units).clone()
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const to = from.clone().shift([from.meta.mirrored ? -1 : 1, 0])
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return u.line(from.p, to.p)
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}
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const tll = get_line(glue_def.top.left)
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const trl = get_line(glue_def.top.right)
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const tip = m.path.converge(tll, trl)
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if (!tip) {
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throw new Error(`Top lines don't intersect in glue "${computed_glue_name}"!`)
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}
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const tlp = u.eq(tll.origin, tip) ? tll.end : tll.origin
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const trp = u.eq(trl.origin, tip) ? trl.end : trl.origin
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const bll = get_line(glue_def.bottom.left)
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const brl = get_line(glue_def.bottom.right)
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const bip = m.path.converge(bll, brl)
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if (!bip) {
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throw new Error(`Bottom lines don't intersect in glue "${computed_glue_name}"!`)
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}
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const blp = u.eq(bll.origin, bip) ? bll.end : bll.origin
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const brp = u.eq(brl.origin, bip) ? brl.end : brl.origin
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const left_waypoints = []
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const right_waypoints = []
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for (const w of glue_def.waypoints) {
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const percent = w.percent / 100
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const center_x = tip[0] + percent * (bip[0] - tip[0])
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const center_y = tip[1] + percent * (bip[1] - tip[1])
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const left_x = center_x - w.width[0]
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const right_x = center_x + w.width[1]
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left_waypoints.push([left_x, center_y])
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right_waypoints.unshift([right_x, center_y])
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}
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let waypoints
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const is_split = a.type(glue_def.top.right)(relative_units) == 'number'
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if (is_split) {
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waypoints = [tip, tlp]
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.concat(left_waypoints)
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.concat([blp, bip])
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} else {
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waypoints = [trp, tip, tlp]
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.concat(left_waypoints)
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.concat([blp, bip, brp])
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.concat(right_waypoints)
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}
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glue = u.poly(waypoints)
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}
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if (side == 'glue') return glue
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if (side == 'middle') {
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let middle = u.subtract(glue, left)
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middle = u.subtract(middle, right)
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return middle
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}
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let both = u.union(u.deepcopy(left), glue)
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both = u.union(both, u.deepcopy(right))
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return both
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}
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}
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const whats = {
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rectangle,
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}
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exports.parse = (config = {}, points = {}, units = {}) => {
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// output outlines will be collected here
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const outlines = {}
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// the config must be an actual object so that the exports have names
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config = a.sane(config, 'outlines', 'object')()
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for (let [outline_name, parts] of Object.entries(config)) {
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// placeholder for the current outline
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outlines[outline_name] = {models: {}}
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// each export can consist of multiple parts
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// either sub-objects or arrays are fine...
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if (a.type(parts)() == 'array') {
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parts = {...parts}
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}
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parts = a.sane(parts, `outlines.${key}`, 'object')()
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for (let [part_name, part] of Object.entries(parts)) {
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const name = `outlines.${key}.${part_name}`
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// string part-shortcuts are expanded first
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if (a.type(part)() == 'string') {
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part = o.operation(part, {outline: Object.keys(outlines)})
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}
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// process keys that are common to all part declarations
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const what = a.in(part.what || 'outline', `${name}.what`, ['rectangle', 'circle', 'polygon', 'outline'])
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// where is delayed until we have all, potentially what-dependent units
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const where = units => filter(part.where, `${name}.where`, points, units)
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const operation = u[a.in(part.operation || 'add', `${name}.operation`, ['add', 'subtract', 'intersect', 'stack'])]
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const bound = a.sane(part.bound === undefined ? true : part.bound, `${name}.bound`, 'boolean')()
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const mirror = a.sane(part.mirror || false, `${name}.mirror`, 'boolean')()
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// which are then removed, so ops can check their own unexpected keys
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delete part.what
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delete part.where
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delete part.operation
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delete part.bound
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delete part.mirror
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// a prototype "shape" maker (and its units) are computed
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const [shape, shape_units] = whats[what](part, name, points, units)
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// and then repeated for all where positions
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for (const w of where(shape_units)) {
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const [normal, mirrored] = shape(w, bound, mirror)
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outlines[outline_name] = operation(outlines[outline_name], normal)
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// and even their mirrors, if applicable
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if (mirror) {
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outlines[outline_name] = operation(outlines[outline_name], mirrored)
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}
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}
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}
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m.model.originate(outlines[outline_name])
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m.model.simplify(outlines[outline_name])
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}
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return outlines
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}
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// let arg
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// let anchor
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// const anchor_def = part.anchor || {}
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// switch (part.type) {
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// case 'keys':
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// arg = layout_fn(part, name, expected)
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// break
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// case 'rectangle':
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// a.unexpected(part, name, expected.concat(['anchor', 'size', 'corner', 'bevel', 'mirror']))
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// const size = a.wh(part.size, `${name}.size`)(units)
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// const rec_units = prep.extend({
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// sx: size[0],
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// sy: size[1]
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// }, units)
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// anchor = anchor_lib.parse(anchor_def, `${name}.anchor`, points)(rec_units)
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// const corner = a.sane(part.corner || 0, `${name}.corner`, 'number')(rec_units)
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// const bevel = a.sane(part.bevel || 0, `${name}.bevel`, 'number')(rec_units)
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// const rect_mirror = a.sane(part.mirror || false, `${name}.mirror`, 'boolean')()
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// const rect = m.model.moveRelative(rectangle(size[0], size[1], corner, bevel, name), [-size[0]/2, -size[1]/2])
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// arg = anchor.position(u.deepcopy(rect))
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// if (rect_mirror) {
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// const mirror_anchor = u.deepcopy(anchor_def)
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// a.assert(mirror_anchor.ref, `Field "${name}.anchor.ref" must be speficied if mirroring is required!`)
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// anchor = anchor_lib.parse(mirror_anchor, `${name}.anchor --> mirror`, points, undefined, undefined, true)(rec_units)
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// arg = u.union(arg, anchor.position(u.deepcopy(rect)))
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// }
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// break
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// case 'circle':
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// a.unexpected(part, name, expected.concat(['anchor', 'radius', 'mirror']))
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// const radius = a.sane(part.radius, `${name}.radius`, 'number')(units)
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// const circle_units = prep.extend({
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// r: radius
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// }, units)
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// anchor = anchor_lib.parse(anchor_def, `${name}.anchor`, points)(circle_units)
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// const circle_mirror = a.sane(part.mirror || false, `${name}.mirror`, 'boolean')()
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// arg = u.circle(anchor.p, radius)
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// if (circle_mirror) {
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// const mirror_anchor = u.deepcopy(anchor_def)
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// a.assert(mirror_anchor.ref, `Field "${name}.anchor.ref" must be speficied if mirroring is required!`)
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// anchor = anchor_lib.parse(mirror_anchor, `${name}.anchor --> mirror`, points, undefined, undefined, true)(circle_units)
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// arg = u.union(arg, u.circle(anchor.p, radius))
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// }
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// break
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// case 'polygon':
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// a.unexpected(part, name, expected.concat(['points', 'mirror']))
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// const poly_points = a.sane(part.points, `${name}.points`, 'array')()
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// const poly_mirror = a.sane(part.mirror || false, `${name.mirror}`, 'boolean')()
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// const parsed_points = []
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// const mirror_points = []
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// let poly_mirror_x = 0
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// let last_anchor = new Point()
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// let poly_index = 0
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// for (const poly_point of poly_points) {
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// const poly_name = `${name}.points[${++poly_index}]`
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// if (poly_index == 1 && poly_mirror) {
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// a.assert(poly_point.ref, `Field "${poly_name}.ref" must be speficied if mirroring is required!`)
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// const mirrored_ref = anchor_lib.mirror(poly_point.ref, poly_mirror)
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// a.assert(points[poly_point.ref], `Field "${poly_name}.ref" does not name an existing point!`)
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// a.assert(points[mirrored_ref], `The mirror of field "${poly_name}.ref" ("${mirrored_ref}") does not name an existing point!`)
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// poly_mirror_x = (points[poly_point.ref].x + points[mirrored_ref].x) / 2
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// }
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// last_anchor = anchor_lib.parse(poly_point, poly_name, points, true, last_anchor)(units)
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// parsed_points.push(last_anchor.p)
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// mirror_points.push(last_anchor.clone().mirror(poly_mirror_x).p)
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// }
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// arg = u.poly(parsed_points)
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// if (poly_mirror) {
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// arg = u.union(arg, u.poly(mirror_points))
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// }
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// break
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// case 'outline':
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// a.unexpected(part, name, expected.concat(['name', 'fillet']))
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// a.assert(outlines[part.name], `Field "${name}.name" does not name an existing outline!`)
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// const fillet = a.sane(part.fillet || 0, `${name}.fillet`, 'number')(units)
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// arg = u.deepcopy(outlines[part.name])
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// if (fillet) {
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// for (const [index, chain] of m.model.findChains(arg).entries()) {
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// arg.models[`fillet_${index}`] = m.chain.fillet(chain, fillet)
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// }
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// }
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// break
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// default:
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// throw new Error(`Field "${name}.type" (${part.type}) does not name a valid outline part type!`)
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// }
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// result = op(result, arg)
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// }
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// m.model.originate(result)
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// m.model.simplify(result)
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// outlines[key] = result
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// }
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// return outlines
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// }
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