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374 lines
9.7 KiB
JavaScript
374 lines
9.7 KiB
JavaScript
/** @module visual */
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/**
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* Basic Shape Stimulus.
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*
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* @author Alain Pitiot
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* @version 2020.1
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* @copyright (c) 2020 Ilixa Ltd. ({@link http://ilixa.com})
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* @license Distributed under the terms of the MIT License
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*/
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import { VisualStim } from './VisualStim';
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import { Color } from '../util/Color';
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import { ColorMixin } from '../util/ColorMixin';
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import * as util from '../util/Util';
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/**
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* <p>This class provides the basic functionalities of shape stimuli.</p>
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*
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* @class
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* @extends VisualStim
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* @mixes ColorMixin
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* @param {Object} options
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* @param {String} options.name - the name used when logging messages from this stimulus
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* @param {Window} options.win - the associated Window
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* @param {number} options.lineWidth - the line width
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* @param {Color} [options.lineColor= Color('white')] the line color
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* @param {Color} options.fillColor - the fill color
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* @param {number} [options.opacity= 1.0] - the opacity
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* @param {Array.<Array.<number>>} [options.vertices= [[-0.5, 0], [0, 0.5], [0.5, 0]]] - the shape vertices
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* @param {boolean} [options.closeShape= true] - whether or not the shape is closed
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* @param {Array.<number>} [options.pos= [0, 0]] - the position of the center of the shape
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* @param {number} [options.size= 1.0] - the size
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* @param {number} [options.ori= 0.0] - the orientation (in degrees)
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* @param {string} options.units - the units of the stimulus vertices, size and position
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* @param {number} [options.contrast= 1.0] - the contrast
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* @param {number} [options.depth= 0] - the depth
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* @param {boolean} [options.interpolate= true] - whether or not the shape is interpolated
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* @param {boolean} [options.autoDraw= false] - whether or not the stimulus should be automatically drawn on every frame flip
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* @param {boolean} [options.autoLog= false] - whether or not to log
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*/
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export class ShapeStim extends util.mix(VisualStim).with(ColorMixin)
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{
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constructor({
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name,
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win,
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lineWidth = 1.5,
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lineColor = new Color('white'),
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fillColor,
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opacity = 1.0,
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vertices = [[-0.5, 0], [0, 0.5], [0.5, 0]],
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closeShape = true,
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pos = [0, 0],
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size = 1.0,
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ori = 0.0,
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units,
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contrast = 1.0,
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depth = 0,
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interpolate = true,
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autoDraw,
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autoLog
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} = {})
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{
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super({ name, win, units, ori, opacity, pos, size, autoDraw, autoLog });
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// the PIXI polygon corresponding to the vertices, in pixel units:
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this._pixiPolygon_px = undefined;
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// whether the vertices need to be updated:
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this._needVertexUpdate = true;
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// the vertices (in pixel units):
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this._vertices_px = undefined;
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this._addAttributes(ShapeStim, lineWidth, lineColor, fillColor, vertices, closeShape, contrast, depth, interpolate);
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}
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/**
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* Force a refresh of the stimulus.
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*
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* @name module:visual.ShapeStim#refresh
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* @public
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*/
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refresh()
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{
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super.refresh();
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this._needVertexUpdate = true;
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}
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/**
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* Setter for the size attribute.
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*
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* @name module:visual.ShapeStim#setSize
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* @public
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* @param {number | number[]} size - the stimulus size
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* @param {boolean} [log= false] - whether of not to log
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*/
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setSize(size, log = false)
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{
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super.setSize(size, log);
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this._needVertexUpdate = true;
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}
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/**
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* Setter for the line width attribute.
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*
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* @name module:visual.ShapeStim#setLineWidth
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* @public
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* @param {number} lineWidth - the line width
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* @param {boolean} [log= false] - whether of not to log
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*/
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setLineWidth(lineWidth, log = false)
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{
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this._setAttribute('lineWidth', lineWidth, log);
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this._needUpdate = true;
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}
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/**
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* Setter for the line color attribute.
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*
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* @name module:visual.ShapeStim#setLineColor
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* @public
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* @param {Color} lineColor - the line color
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* @param {boolean} [log= false] - whether of not to log
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*/
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setLineColor(lineColor, log = false)
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{
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this._setAttribute('lineColor', lineColor, log);
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this._needUpdate = true;
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}
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/**
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* Setter for the fill color attribute.
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*
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* @name module:visual.ShapeStim#setFillColor
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* @public
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* @param {Color} fillColor - the fill color
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* @param {boolean} [log= false] - whether of not to log
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*/
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setFillColor(fillColor, log = false)
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{
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this._setAttribute('fillColor', fillColor, log);
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this._needUpdate = true;
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}
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/**
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* Setter for the vertices attribute.
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*
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* @name module:visual.ShapeStim#setVertices
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* @public
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* @param {Array.<Array.<number>>} vertices - the vertices
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* @param {boolean} [log= false] - whether of not to log
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*/
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setVertices(vertices, log = false)
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{
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const response = {
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origin: 'ShapeStim.setVertices',
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context: 'when setting the vertices of ShapeStim: ' + this._name
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};
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this._psychoJS.logger.debug('set the vertices of ShapeStim:', this.name);
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try
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{
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// if vertices is a string, we check whether it is a known shape:
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if (typeof vertices === 'string')
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{
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if (vertices in ShapeStim.KnownShapes)
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vertices = ShapeStim.KnownShapes[vertices];
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else
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throw 'unknown shape';
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}
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this._setAttribute('vertices', vertices, log);
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// this._setAttribute({
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// name: 'vertices',
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// value: vertices,
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// assert: v => (v != null) && (typeof v !== 'undefined') && Array.isArray(v) )
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// log);
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this._needVertexUpdate = true;
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this._needUpdate = true;
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}
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catch (error)
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{
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throw Object.assign(response, { error: error });
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}
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}
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/**
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* Determine whether this stimulus contains the given object.
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*
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* @name module:visual.ShapeStim#contains
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* @public
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* @param {Object} object - the object
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* @param {string} units - the units
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* @return {boolean} whether or not the stimulus contains the object
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*/
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contains(object, units) {
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this._psychoJS.logger.debug('test whether BaseShameStim:', this.name, 'contains object: ', ('name' in object) ? object.name : object);
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// get position of object:
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const objectPos_px = util.getPositionFromObject(object, units);
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if (typeof objectPos_px === 'undefined')
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throw { origin : 'ShapeStim.contains', context : 'when determining whether BaseShameStim: ' + this._name + ' contains object: ' + util.toString(object), error : 'unable to determine the position of the object' };
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// test for inclusion
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// note: the vertices are centered around (0, 0) so we need to add to them the stimulus' position
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const pos_px = util.to_px(this.pos, this.units, this.win);
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const polygon_px = this._vertices_px.map(v => [v[0] + pos_px[0], v[1] + pos_px[1]]);
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return util.IsPointInsidePolygon(objectPos_px, polygon_px);
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}
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/**
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* Update the stimulus, if necessary.
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*
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* @name module:visual.ShapeStim#_updateIfNeeded
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* @private
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*/
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_updateIfNeeded() {
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if (!this._needUpdate)
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return;
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this._needUpdate = false;
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this._getPolygon(/*true*/); // this also updates _vertices_px
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this._pixi = undefined;
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// no polygon to draw: return immediately
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if (typeof this._pixiPolygon_px === 'undefined')
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return;
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// prepare the polygon in the given color and opacity:
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this._pixi = new PIXI.Graphics();
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this._pixi.lineStyle(this._lineWidth, this._lineColor.int, this._opacity, 0.5);
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if (typeof this._fillColor !== 'undefined')
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this._pixi.beginFill(this._fillColor.int, this._opacity);
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this._pixi.drawPolygon(this._pixiPolygon_px);
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if (typeof this._fillColor !== 'undefined')
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this._pixi.endFill();
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// set polygon position and rotation:
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this._pixi.position = util.to_pixiPoint(this.pos, this.units, this.win);
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this._pixi.rotation = this.ori * Math.PI / 180.0;
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}
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/**
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* Get the PIXI polygon (in pixel units) corresponding to the vertices.
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*
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* @name module:visual.ShapeStim#_getPolygon
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* @private
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* @return {Object} the PIXI polygon corresponding to this stimulus vertices.
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*/
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_getPolygon(/*force = false*/) {
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if (!this._needVertexUpdate)
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return;
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this._needVertexUpdate = false;
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console.log('>>>>>>>>> CREATING PIXI POLYGON!!!!');
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//if (!force && typeof this._pixiPolygon_px !== 'undefined')
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// return this._pixiPolygon_px;
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// make sure the vertices in pixel units are available, and flatten the array of arrays:
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this._getVertices_px(/*force*/);
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let coords_px = [];
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for (const vertex_px of this._vertices_px)
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coords_px.push.apply(coords_px, vertex_px);
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// close the polygon if need be:
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if (coords_px.length >= 6 && this._closeShape) {
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// note: we first check whether the vertices already define a closed polygon:
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const n = coords_px.length;
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if (coords_px[0] !== coords_px[n - 2] || coords_px[1] !== coords_px[n - 1]) {
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coords_px.push(coords_px[0]);
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coords_px.push(coords_px[1]);
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}
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}
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// create the PIXI polygon:
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this._pixiPolygon_px = new PIXI.Polygon(coords_px);
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return this._pixiPolygon_px;
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}
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/**
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* Get the vertices in pixel units.
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*
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* @name module:visual.ShapeStim#_getVertices_px
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* @protected
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* @return {Array.<number[]>} the vertices (in pixel units)
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*/
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_getVertices_px(/*force = false*/)
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{
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/*if (!force && typeof this._vertices_px !== 'undefined')
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return this._vertices_px;*/
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// handle flipping:
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let flip = [1.0, 1.0];
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if ('_flipHoriz' in this && this._flipHoriz)
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flip[0] = -1.0;
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if ('_flipVert' in this && this._flipVert)
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flip[1] = -1.0;
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// handle size, flipping, and convert to pixel units:
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this._vertices_px = this._vertices.map( v => util.to_px([v[0] * this._size[0] * flip[0], v[1] * this._size[1] * flip[1]], this._units, this._win) );
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return this._vertices_px;
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}
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}
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/**
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* Known shapes.
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*
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* @readonly
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* @public
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*/
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ShapeStim.KnownShapes = {
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cross: [
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[-0.1, +0.5], // up
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[+0.1, +0.5],
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[+0.1, +0.1],
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[+0.5, +0.1], // right
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[+0.5, -0.1],
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[+0.1, -0.1],
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[+0.1, -0.5], // down
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[-0.1, -0.5],
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[-0.1, -0.1],
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[-0.5, -0.1], // left
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[-0.5, +0.1],
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[-0.1, +0.1]
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],
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star7: [
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[0.0,0.5],
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[0.09,0.18],
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[0.39,0.31],
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[0.19,0.04],
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[0.49,-0.11],
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[0.16,-0.12],
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[0.22,-0.45],
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[0.0,-0.2],
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[-0.22,-0.45],
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[-0.16,-0.12],
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[-0.49,-0.11],
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[-0.19,0.04],
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[-0.39,0.31],
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[-0.09,0.18]
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]
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}; |