import { constructors } from '../core/library.js';
import { doCreate, mergeOver, Ωempty } from '../helper/utilities.js';
import { releaseVector, requestVector } from '../untracked-factory/vector.js';
import { releaseArray, requestArray } from '../helper/array-pool.js';
import baseMix from '../mixin/base.js';
import shapeMix from '../mixin/shape-basic.js';Shared constants
import { _abs, _max, _min, ENTITY, ZERO_STR } from '../helper/shared-vars.js';Local constants
const POLYGON = 'polygon',
T_POLYGON = 'Polygon';const Polygon = function (items = Ωempty) {
this.shapeInit(items);
return this;
};const P = Polygon.prototype = doCreate();
P.type = T_POLYGON;
P.lib = ENTITY;
P.isArtefact = true;
P.isAsset = false;baseMix(P);
shapeMix(P);const defaultAttributes = {
sides: 0,
sideLength: 0,DEPRECATED - this is the (misleading) old name for the sideLength attribute
radius: 0,
};
P.defs = mergeOver(P.defs, defaultAttributes);const S = P.setters,
D = P.deltaSetters;sides
S.sides = function (item) {
this.sides = item;
this.updateDirty();
};
D.sides = function (item) {
this.sides += item;
this.updateDirty();
};sideLength
S.sideLength = function (item) {
this.sideLength = item;
this.updateDirty();
};
D.sideLength = function (item) {
this.sideLength += item;
this.updateDirty();
};DEPRECATED - this is the (misleading) old name for the sideLength attribute
S.radius = function (item) {
this.radius = item;
this.updateDirty();
};
D.radius = function (item) {
this.radius += item;
this.updateDirty();
};cleanSpecies - internal helper function - called by prepareStamp
P.cleanSpecies = function () {
this.dirtySpecies = false;
this.pathDefinition = this.makePolygonPath();
};makePolygonPath - internal helper function - called by cleanSpecies
P.makePolygonPath = function () {radius attribute is deprecated!
const sideLength = this.sideLength || this.radius,
sides = this.sides,
turn = 360 / sides,
yPts = requestArray();
let currentY = 0,
myPath = ZERO_STR;
const v = requestVector({x: 0, y: -sideLength});
for (let i = 0; i < sides; i++) {
v.rotate(turn);
currentY += v.y;
yPts.push(currentY);
myPath += `${v.x.toFixed(1)},${v.y.toFixed(1)} `;
}
releaseVector(v);
const myMin = _min(...yPts),
myMax = _max(...yPts),
myYoffset = (((_abs(myMin) + _abs(myMax)) - sideLength) / 2).toFixed(1);
myPath = `m0,${myYoffset}l${myPath}z`;
releaseArray(yPts);
return myPath;
};Accepts argument with attributes:
scrawl.makePolygon({
name: 'triangle',
startX: 20,
startY: 935,
sideLength: 60,
sides: 3,
fillStyle: 'lightblue',
method: 'fillAndDraw',
});
export const makePolygon = function (items) {
if (!items) return false;
items.species = POLYGON;
return new Polygon(items);
};
constructors.Polygon = Polygon;