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1 files changed, 44 insertions, 0 deletions

diff --git a/lib/systems/lissajous_position_updater.js b/lib/systems/lissajous_position_updater.js
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+++ b/lib/systems/lissajous_position_updater.js
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+import { System } from '@serpentity/serpentity';
+import LissajousCurve from '../nodes/lissajous_curve';
+
+const internals = {
+  kAmplitude: 0.8,
+  kPeriod: Math.PI * 12000000
+};
+
+export default class WebGLRenderer extends System {
+
+  constructor() {
+
+    super();
+  }
+
+  added(engine){
+
+    this.curves = engine.getNodes(LissajousCurve);
+    this.time = 0;
+  }
+
+  removed(){
+
+    this.curves = undefined;
+    this.time = undefined;
+  }
+
+  update(dt){
+
+    this.time = (this.time + dt / 100) % internals.kPeriod;
+
+    for (const curve of this.curves) {
+      curve.position.x = this._getPosition(internals.kAmplitude, curve.frequency.a, this.time, 0);
+      curve.position.y = this._getPosition(internals.kAmplitude, curve.frequency.b, this.time, 0);
+      curve.position.z = this._getPosition(internals.kAmplitude, curve.frequency.c, this.time, 0);
+    }
+    console.log('UP');
+  }
+
+  _getPosition(amplitude, frequency, time, phaseShift) {
+
+    return amplitude * Math.sin(frequency * time + phaseShift);
+  }
+};