90 lines
3.2 KiB
JavaScript
90 lines
3.2 KiB
JavaScript
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import BaseLightSource from "./base-light-source.mjs";
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import PointEffectSourceMixin from "./point-effect-source.mjs";
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/**
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* A specialized subclass of the BaseLightSource which renders a source of light as a point-based effect.
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* @extends {BaseLightSource}
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* @mixes {PointEffectSourceMixin}
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*/
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export default class PointLightSource extends PointEffectSourceMixin(BaseLightSource) {
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/** @override */
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static effectsCollection = "lightSources";
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/* -------------------------------------------- */
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/* Source Suppression Management */
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/* -------------------------------------------- */
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/**
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* Update darkness suppression according to darkness sources collection.
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*/
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#updateDarknessSuppression() {
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this.suppression.darkness = canvas.effects.testInsideDarkness({x: this.x, y: this.y}, this.elevation);
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}
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/* -------------------------------------------- */
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/* Light Source Initialization */
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/* -------------------------------------------- */
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/** @inheritDoc */
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_initialize(data) {
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super._initialize(data);
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Object.assign(this.data, {
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radius: Math.max(this.data.dim ?? 0, this.data.bright ?? 0)
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});
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}
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/* -------------------------------------------- */
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/** @inheritDoc */
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_createShapes() {
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this.#updateDarknessSuppression();
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super._createShapes();
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}
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/* -------------------------------------------- */
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/** @inheritDoc */
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_configure(changes) {
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this.ratio = Math.clamp(Math.abs(this.data.bright) / this.data.radius, 0, 1);
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super._configure(changes);
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}
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/* -------------------------------------------- */
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/** @inheritDoc */
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_getPolygonConfiguration() {
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return Object.assign(super._getPolygonConfiguration(), {useThreshold: true, includeDarkness: true});
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}
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/* -------------------------------------------- */
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/* Visibility Testing */
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/* -------------------------------------------- */
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/**
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* Test whether this LightSource provides visibility to see a certain target object.
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* @param {object} config The visibility test configuration
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* @param {CanvasVisibilityTest[]} config.tests The sequence of tests to perform
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* @param {PlaceableObject} config.object The target object being tested
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* @returns {boolean} Is the target object visible to this source?
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*/
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testVisibility({tests, object}={}) {
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if ( !(this.data.vision && this._canDetectObject(object)) ) return false;
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return tests.some(test => this.shape.contains(test.point.x, test.point.y));
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}
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/* -------------------------------------------- */
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/**
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* Can this LightSource theoretically detect a certain object based on its properties?
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* This check should not consider the relative positions of either object, only their state.
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* @param {PlaceableObject} target The target object being tested
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* @returns {boolean} Can the target object theoretically be detected by this vision source?
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*/
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_canDetectObject(target) {
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const tgt = target?.document;
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const isInvisible = ((tgt instanceof TokenDocument) && tgt.hasStatusEffect(CONFIG.specialStatusEffects.INVISIBLE));
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return !isInvisible;
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}
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}
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