backend/libs/three/extras/curves/CubicBezierCurve3.js

import { Curve } from '../core/Curve.js';
import { CubicBezier } from '../core/Interpolations.js';
import { Vector3 } from '../../math/Vector3.js';

class CubicBezierCurve3 extends Curve {
	constructor(v0 = new Vector3(), v1 = new Vector3(), v2 = new Vector3(), v3 = new Vector3()) {
		super();

		this.type = 'CubicBezierCurve3';

		this.v0 = v0;
		this.v1 = v1;
		this.v2 = v2;
		this.v3 = v3;
	}

	getPoint(t, optionalTarget = new Vector3()) {
		const point = optionalTarget;

		const v0 = this.v0,
			v1 = this.v1,
			v2 = this.v2,
			v3 = this.v3;

		point.set(CubicBezier(t, v0.x, v1.x, v2.x, v3.x), CubicBezier(t, v0.y, v1.y, v2.y, v3.y), CubicBezier(t, v0.z, v1.z, v2.z, v3.z));

		return point;
	}

	copy(source) {
		super.copy(source);

		this.v0.copy(source.v0);
		this.v1.copy(source.v1);
		this.v2.copy(source.v2);
		this.v3.copy(source.v3);

		return this;
	}

	toJSON() {
		const data = super.toJSON();

		data.v0 = this.v0.toArray();
		data.v1 = this.v1.toArray();
		data.v2 = this.v2.toArray();
		data.v3 = this.v3.toArray();

		return data;
	}

	fromJSON(json) {
		super.fromJSON(json);

		this.v0.fromArray(json.v0);
		this.v1.fromArray(json.v1);
		this.v2.fromArray(json.v2);
		this.v3.fromArray(json.v3);

		return this;
	}
}

CubicBezierCurve3.prototype.isCubicBezierCurve3 = true;

export { CubicBezierCurve3 };