67 lines
1.5 KiB
JavaScript
67 lines
1.5 KiB
JavaScript
import {compose} from '@avocado/core';
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import {Mixin, Property} from '@avocado/mixins'
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import {Vector} from '@avocado/math'
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export function VectorMixin(
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vectorKey = 'vector',
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x = 'x',
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y = 'y',
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meta = {},
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) {
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meta = {
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default: [0, 0],
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emit: function (...args) {
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if (this.emit) {
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this.emit(...args);
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}
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},
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eq: function(l, r) {
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return Vector.equals(l, r);
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},
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get: function() {
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const vector = this[meta.transformProperty(vectorKey)];
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if (!vector) {
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return [0, 0];
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}
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return [vector[0], vector[1]];
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},
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transformProperty: (key) => `${key}_PRIVATE_PROPERTY`,
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...meta,
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};
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meta.set = meta.set || function(vector) {
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if (meta.track && meta.emit) {
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if (this[vectorKey][0] !== vector[0]) {
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meta.emit.call(this, `${x}Changed`, this[vectorKey][0], vector[0]);
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}
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if (this[vectorKey][1] !== vector[1]) {
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meta.emit.call(this, `${y}Changed`, this[vectorKey][1], vector[1]);
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}
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}
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this[meta.transformProperty(vectorKey)] = [vector[0], vector[1]];
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}
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const decorate = compose(
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Property(vectorKey, meta),
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);
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return (Superclass) => {
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return class Vector extends decorate(Superclass) {
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get [x]() {
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return this[vectorKey][0];
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}
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set [x](x) {
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this[vectorKey] = [x, this[vectorKey][1]];
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}
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get [y]() {
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return this[vectorKey][1];
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}
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set [y](y) {
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this[vectorKey] = [this[vectorKey][0], y];
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}
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}
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};
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}
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