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git.r.bdr.sh - rbdr/lissajous/blob - lib/systems/lissajous_position_updater.js
39b151ac85d250ead87eaf6356f6b6869944b71a
1 import { System
} from '@serpentity/serpentity';
2 import LissajousCurve
from '../nodes/lissajous_curve';
6 kPeriod: Math
.PI
* 12000000
9 export default class WebGLRenderer
extends System
{
18 this.curves
= engine
.getNodes(LissajousCurve
);
30 this.time
= (this.time
+ dt
/ 500) % internals
.kPeriod
;
32 for (const curve
of this.curves
) {
33 curve
.position
.x
= this._getPosition(curve
.amplitude
.a
, curve
.frequency
.a
, this.time
, 0);
34 curve
.position
.y
= this._getPosition(curve
.amplitude
.b
, curve
.frequency
.b
, this.time
, 0);
35 curve
.position
.z
= this._getPosition(curve
.amplitude
.c
, curve
.frequency
.c
, this.time
, 0);
39 _getPosition(amplitude
, frequency
, time
, phaseShift
) {
41 return amplitude
* Math
.sin(frequency
* time
+ phaseShift
);