romgrk-2d-geometry/dist/classes/Shape.js

Javascript library for 2d geometry

import Errors from '../utils/errors';
import { Matrix } from './Matrix';
let ORIGIN_POINT;
/**
 * Base class representing shape
 * Implement common methods of affine transformations
 */
export class Shape {
    get name() {
        throw (Errors.CANNOT_INVOKE_ABSTRACT_METHOD);
    }
    get box() {
        throw (Errors.CANNOT_INVOKE_ABSTRACT_METHOD);
    }
    clone() {
        throw (Errors.CANNOT_INVOKE_ABSTRACT_METHOD);
    }
    translate(a, b) {
        return this.transform(new Matrix().translate(a, b));
    }
    /**
     * Returns new shape rotated by given angle around given center point.
     * If center point is omitted, rotates around zero point (0,0).
     * Positive value of angle defines rotation in counterclockwise direction,
     * negative angle defines rotation in clockwise direction
     * @param angle - angle in radians
     * @param [center=(0,0)] center
     */
    rotate(angle, center = ORIGIN_POINT) {
        return this.transform(new Matrix().rotate(angle, center.x, center.y));
    }
    scale(a, b) {
        return this.transform(new Matrix().scale(a, b !== null && b !== void 0 ? b : a));
    }
    transform(...args) {
        throw (Errors.CANNOT_INVOKE_ABSTRACT_METHOD);
    }
    /**
     * This method returns an object that defines how data will be
     * serialized when called JSON.stringify() method
     * @returns {Object}
     */
    toJSON() {
        return Object.assign({}, this, { name: this.name });
    }
    svg(attrs = {}) {
        throw (Errors.CANNOT_INVOKE_ABSTRACT_METHOD);
    }
}
/**
 * There is a circular dependency between Shape & Point, so we inject point later
 * when everything is properly defined.
 * @private
 */
export function _setupShape(point) {
    ORIGIN_POINT = point();
}