unity心形线函数

unity 心形线函数的使用：

理论：

实践：

using UnityEngine;
using System.Collections;

public class Test : MonoBehaviour {

	public float r = 5;

	void Start()
	{
		float frame = r * .1f;
		for (float i = -r; i <= r; i+= frame) {

			Vector2 v = GetVec2 (i , r);
			GetG (i, v.x);
			GetG (i, v.y);
		}

	}
	GameObject GetG(float x , float y)
	{
		GameObject g1 = GameObject.CreatePrimitive (PrimitiveType.Quad);
		g1.transform.position = new Vector3 (x, y, 0);
		g1.transform.localScale = Vector3.one * 0.2f;
		g1.transform.SetParent (transform);
		return g1;
	}

	Vector2 GetVec2(float x , float a = 1)
	{
		float p1 = a * a - x * x ;
		float y1 = Mathf.Sqrt (p1) + Mathf.Pow (x * x, 1f / 3);
		float y2 = -Mathf.Sqrt (p1) + Mathf.Pow (x * x, 1f / 3);
		return new Vector2 (y1 , y2);
	}
}

效果：