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improved grating modeling; vertices now are centered around [0, 0];

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This commit is contained in:
lgtst 2022-08-02 15:56:12 +03:00
parent bfe64afed4
commit 5aa36efbbb
1 changed files with 25 additions and 7 deletions
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32
src/visual/GratingStim.js
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@ -468,7 +468,7 @@ export class GratingStim extends VisualStim
*/
_getDisplaySize()
{
let displaySize = this.size;
let displaySize = this._size;
if (typeof displaySize === "undefined")
{
@ -518,10 +518,10 @@ export class GratingStim extends VisualStim
geometry.addAttribute(
"aVertexPosition",
[
0, 0,
this._size_px[0], 0,
this._size_px[0], this._size_px[1],
0, this._size_px[1]
-this._size_px[0] * .5, -this._size_px[1] * .5,
this._size_px[0] * .5, -this._size_px[1] * .5,
this._size_px[0] * .5, this._size_px[1] * .5,
-this._size_px[0] * .5, this._size_px[1] * .5
],
2
);
@ -643,6 +643,25 @@ export class GratingStim extends VisualStim
}
}
/**
* Setter for the anchor attribute.
*
* @param {string} anchor - anchor of the stim
* @param {boolean} [log= false] - whether or not to log
*/
setAnchor (anchor = "center", log = false)
{
this._setAttribute("anchor", anchor, log);
if (this._pixi !== undefined)
{
// Vertices are set directly with origin at [0, 0], centered around it.
// Subtracting 0.5 from anchorNum vals to get desired effect.
const anchorNum = this._anchorTextToNum(this._anchor);
this._pixi.pivot.x = (anchorNum[0] - 0.5) * this._pixi.scale.x * this._pixi.width;
this._pixi.pivot.y = (anchorNum[1] - 0.5) * this._pixi.scale.y * this._pixi.height;
}
}
/**
* Update the stimulus, if necessary.
*
@ -660,6 +679,7 @@ export class GratingStim extends VisualStim
if (this._needPixiUpdate)
{
this._needPixiUpdate = false;
this._size_px = util.to_px(this._size, this.units, this.win);
let shaderName;
let shaderUniforms;
let currentUniforms = {};
@ -753,8 +773,6 @@ export class GratingStim extends VisualStim
this.anchor = this._anchor;
// set the scale:
const displaySize = this._getDisplaySize();
this._size_px = util.to_px(displaySize, this.units, this.win);
this._pixi.scale.x = 1;
this._pixi.scale.y = -1;