[游戏开发]Unity绘制阿基米德螺旋线

1.螺旋线参数方程

x = (α + βt) cos(t);
y = (α + βt) sin(t);

2.使用LineRenderer绘制

using UnityEngine;

public class Draw : MonoBehaviour
{
    public float addSpeed = 3f;
    public float alpha = 1f;
    public float beta = 1f;
    private float t = 0f;
    private float r = 0f;
    private int pointCounter = 0;
    public LineRenderer lineRenderer;
   
    void Update()
    {
        t += addSpeed * Time.deltaTime;
        r = (alpha + beta * t);
        //把时间带入参数方程转化成lineRenderer各Point的坐标
        Vector2 curPoint = new Vector2(r * Mathf.Cos(t), r * Mathf.Sin(t));
        lineRenderer.positionCount++;
        lineRenderer.SetPosition(pointCounter, curPoint);
        pointCounter++;
    }
}

3.效果