unity根据底面长宽，顶点，底面中心点，四个参数绘制球锥体

以下是一种根据底面长宽、顶点、底面中心点等参数绘制球锥体的示例代码：

using UnityEngine;

public class SphericalCone : MonoBehaviour
{
    public float radius = 1.0f; // 底面半径
    public float height = 1.0f; // 高度
    public Vector3 vertex = Vector3.zero; // 顶点位置
    public Vector3 center = Vector3.zero; // 底面中心点位置

    private Mesh mesh;

    private void Start()
    {
        mesh = new Mesh();
        GetComponent<MeshFilter>().mesh = mesh;
        GenerateMesh();
    }

    private void GenerateMesh()
    {
        // 计算底面圆上的点
        Vector3[] points = new Vector3[32];
        float angle = 0.0f;
        float angleStep = 2.0f * Mathf.PI / points.Length;
        for (int i = 0; i < points.Length; i++)
        {
            points[i] = new Vector3(center.x + radius * Mathf.Cos(angle), center.y, center.z + radius * Mathf.Sin(angle));
            angle += angleStep;
        }

        // 计算顶点到底面圆上点的向量
        Vector3[] normals = new Vector3[points.Length];
        for (int i = 0; i < points.Length; i++)
        {
            normals[i] = (points[i] - vertex).normalized;
        }

        // 计算三角形索引
        int[] indices = new int[(points.Length - 1) * 3];
        for (int i = 0; i < points.Length - 1; i++)
        {
            indices[i * 3] = i;
            indices[i * 3 + 1] = i + 1;
            indices[i * 3 + 2] = points.Length - 1;
        }

        // 创建Mesh
        mesh.vertices = new Vector3[points.Length + 1];
        mesh.normals = new Vector3[points.Length + 1];
        mesh.triangles = new int[indices.Length + 3];
        for (int i = 0; i < points.Length; i++)
        {
            mesh.vertices[i] = points[i];
            mesh.normals[i] = normals[i];
        }
        mesh.vertices[points.Length] = vertex;
        mesh.normals[points.Length] = (vertex - center).normalized;
        for (int i = 0; i < indices.Length; i++)
        {
            mesh.triangles[i] = indices[i];
        }
        mesh.triangles[indices.Length] = points.Length - 1;
        mesh.triangles[indices.Length + 1] = indices[0];
        mesh.triangles[indices.Length + 2] = 0;
        mesh.RecalculateBounds();
    }
}

在这个示例代码中，我们首先根据底面半径和底面圆上的点数量，计算出底面圆上的点的位置。然后，我们计算每个底面圆上的点与顶点之间的向量，以及每个底面圆上的点的法向量。接着，我们根据底面圆上的点和三角形索引，创建球锥体的Mesh。最后，我们将Mesh赋值给MeshFilter组件，以显示球锥体。