Bezier

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Bezier : MonoBehaviour {
    public LineRenderer lineRenderer;
    public Transform point0, point1, point2;
    private int numPoints = 50;
    private Vector3[] positions = new Vector3[50];
    private float timer;

    private void Start() {
        lineRenderer.positionCount = numPoints;
    }
    private void Update() {
        timer += Time.deltaTime;
        DrawQuadraticCurve();
    }

    private void DrawQuadraticCurve() {
        for (int i = 1; i < numPoints + 1; i++) {
            float t = i / (float)numPoints;
            positions[i - 1] = CalcQuadraticBezierPoint(t * timer, point0.position, point1.position, point2.position);
        }
        lineRenderer.SetPositions(positions);
    }

    private Vector3 CalcQuadraticBezierPoint(float t, Vector3 p0, Vector3 p1, Vector3 p2) {
        float u = 1 - t;
        float tt = t * t;
        float uu = u * u;

        Vector3 p = uu * p0;
        p += 2 * u * t * p1;
        p += tt * p2;
        return p;
    }
}