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Add support for per-zone rotation and mirroring

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This commit is contained in:
Bán Dénes 2020-08-16 19:39:30 +02:00
parent 1a92a7d214
commit edf5d3d962
1 changed files with 92 additions and 43 deletions
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135
src/points.js
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@ -17,7 +17,7 @@ const render_zone = exports._render_zone = (zone_name, zone, anchor, global_key)
// zone-wide sanitization
a.detect_unexpected(zone, `points.zones.${zone_name}`, ['anchor', 'columns', 'rows', 'key'])
a.detect_unexpected(zone, `points.zones.${zone_name}`, ['columns', 'rows', 'key'])
// the anchor comes from "above", because it needs other zones too (for references)
const cols = a.sane(zone.columns || {}, `points.zones.${zone_name}.columns`, 'object')
const zone_wide_rows = a.sane(zone.rows || {'default': {}}, `points.zones.${zone_name}.rows`, 'object')
@ -178,79 +178,128 @@ const render_zone = exports._render_zone = (zone_name, zone, anchor, global_key)
return points
}
const parse_axis = exports._parse_axis = (config, name, points) => {
if (!['number', 'undefined'].includes(a.type(config))) {
const mirror_obj = a.sane(config || {}, name, 'object')
const distance = a.sane(mirror_obj.distance || 0, `${name}.distance`, 'number')
delete mirror_obj.distance
let axis = a.anchor(mirror_obj, name, points).x
axis += distance / 2
return axis
} else return config
}
const perform_mirror = exports._perform_mirror = (point, axis) => {
if (axis !== undefined) {
point.meta.mirrored = false
if (point.meta.asym == 'left') return ['', null]
const mp = point.clone().mirror(axis)
const mirrored_name = `mirror_${point.meta.name}`
mp.meta = a.extend(mp.meta, mp.meta.mirror || {})
mp.meta.name = mirrored_name
mp.meta.colrow = `mirror_${mp.meta.colrow}`
mp.meta.mirrored = true
if (point.meta.asym == 'right') {
point.meta.skip = true
}
return [mirrored_name, mp]
}
return ['', null]
}
exports.parse = (config = {}) => {
// config sanitization
a.detect_unexpected(config, 'points', ['zones', 'key', 'rotate', 'mirror'])
let points = {}
// getting original points
const zones = a.sane(config.zones || {}, 'points.zones', 'object')
const global_key = a.sane(config.key || {}, 'points.key', 'object')
const global_rotate = a.sane(config.rotate || 0, 'points.rotate', 'number')
const global_mirror = config.mirror
let points = {}
let mirrored_points = {}
let all_points = {}
// rendering zones
for (let [zone_name, zone] of Object.entries(zones)) {
// handle zone-level `extends` clauses
zone = a.inherit('points.zones', zone_name, zones)
const anchor = a.anchor(zone.anchor || {}, `points.zones.${zone_name}.anchor`, points)
// extracting keys that are handled here, not at the zone render level
const anchor = a.anchor(zone.anchor || {}, `points.zones.${zone_name}.anchor`, all_points)
const rotate = a.sane(zone.rotate || 0, `points.zones.${zone_name}.rotate`, 'number')
const mirror = zone.mirror
delete zone.anchor
delete zone.rotate
delete zone.mirror
// creating new points
const new_points = render_zone(zone_name, zone, anchor, global_key)
for (const new_key of Object.keys(new_points)) {
if (Object.keys(points).includes(new_key)) {
throw new Error(`Key "${new_key}" defined more than once!`)
// adjusting new points
for (const [new_name, new_point] of Object.entries(new_points)) {
// issuing a warning for duplicate keys
if (Object.keys(points).includes(new_name)) {
throw new Error(`Key "${new_name}" defined more than once!`)
}
// per-zone rotation
if (rotate) {
new_point.rotate(rotate)
}
}
// adding new points so that they can be referenced from now on
points = Object.assign(points, new_points)
all_points = Object.assign(all_points, points)
// per-zone mirroring for the new keys
const axis = parse_axis(mirror, `points.zones.${zone_name}.mirror`, all_points)
if (axis) {
for (const new_point of Object.values(new_points)) {
const [mname, mp] = perform_mirror(new_point, axis)
if (mp) {
mirrored_points[mname] = mp
all_points[mname] = mp
}
}
}
}
// merging regular and early-mirrored points
points = Object.assign(points, mirrored_points)
// applying global rotation
if (config.rotate !== undefined) {
const r = a.sane(config.rotate || 0, 'points.rotate', 'number')
for (const p of Object.values(points)) {
p.rotate(config.rotate)
for (const point of Object.values(points)) {
if (global_rotate) {
point.rotate(global_rotate)
}
}
// mirroring
if (config.mirror !== undefined) {
const mirror = a.sane(config.mirror || {}, 'points.mirror', 'object')
let axis = mirror.axis
if (axis === undefined) {
const distance = a.sane(mirror.distance || 0, 'points.mirror.distance', 'number')
delete mirror.distance
axis = a.anchor(mirror, 'points.mirror', points).x
axis += distance / 2
} else {
axis = a.sane(axis || 0, 'points.mirror.axis', 'number')
}
const mirrored_points = {}
for (const [name, p] of Object.entries(points)) {
if (p.meta.asym == 'left') continue
const mp = p.clone().mirror(axis)
mp.meta = a.extend(mp.meta, mp.meta.mirror || {})
mp.meta.mirrored = true
p.meta.mirrored = false
const new_name = `mirror_${name}`
mp.meta.name = new_name
mp.meta.colrow = `mirror_${mp.meta.colrow}`
mirrored_points[new_name] = mp
if (p.meta.asym == 'right') {
p.meta.skip = true
// global mirroring for points that haven't been mirrored yet
const global_axis = parse_axis(global_mirror, `points.mirror`, points)
const global_mirrored_points = {}
for (const point of Object.values(points)) {
if (global_axis && point.mirrored === undefined) {
const [mname, mp] = perform_mirror(point, global_axis)
if (mp) {
global_mirrored_points[mname] = mp
}
}
Object.assign(points, mirrored_points)
}
// merging the global-mirrored points as well
points = Object.assign(points, global_mirrored_points)
// removing temporary points
const filtered = {}
for (const [k, p] of Object.entries(points)) {
if (p.meta.skip) continue
filtered[k] = p
}
// done
return filtered
}