unity通过代码生成一个胶囊体mesh

可以使用以下代码生成一个胶囊体mesh：

using UnityEngine;

public class CapsuleGenerator : MonoBehaviour
{
    public float radius = 0.5f;
    public float height = 2.0f;
    public int segments = 16;

    void Start()
    {
        MeshFilter meshFilter = GetComponent<MeshFilter>();
        Mesh mesh = new Mesh();
        meshFilter.mesh = mesh;

        int numVertices = (segments + 1) * (segments + 1) + 2;
        int numTriangles = segments * segments * 2 + segments * 6;

        Vector3[] vertices = new Vector3[numVertices];
        int[] triangles = new int[numTriangles * 3];

        int vertexIndex = 0;
        float angleStep = Mathf.PI * 2 / segments;

        // Generate top and bottom vertices
        vertices[vertexIndex++] = Vector3.up * height * 0.5f;
        for (int i = 0; i <= segments; i++)
        {
            float angle = angleStep * i;
            vertices[vertexIndex++] = new Vector3(Mathf.Sin(angle) * radius, height * 0.5f - radius, Mathf.Cos(angle) * radius);
        }
        vertices[vertexIndex++] = Vector3.down * height * 0.5f;
        for (int i = 0; i <= segments; i++)
        {
            float angle = angleStep * i;
            vertices[vertexIndex++] = new Vector3(Mathf.Sin(angle) * radius, -height * 0.5f + radius, Mathf.Cos(angle) * radius);
        }

        // Generate middle vertices
        for (int i = 1; i < segments; i++)
        {
            float angle1 = angleStep * i;
            float y1 = Mathf.Cos(angle1) * radius;
            float r1 = Mathf.Sin(angle1) * radius;

            for (int j = 0; j <= segments; j++)
            {
                float angle2 = angleStep * j;
                vertices[vertexIndex++] = new Vector3(Mathf.Sin(angle2) * r1, y1, Mathf.Cos(angle2) * r1);
            }
        }

        // Generate top and bottom triangles
        int triangleIndex = 0;
        for (int i = 1; i <= segments; i++)
        {
            triangles[triangleIndex++] = 0;
            triangles[triangleIndex++] = i + 1;
            triangles[triangleIndex++] = i;
        }
        triangles[triangleIndex++] = 0;
        triangles[triangleIndex++] = 1;
        triangles[triangleIndex++] = segments + 1;

        for (int i = 1; i <= segments; i++)
        {
            triangles[triangleIndex++] = numVertices - 1;
            triangles[triangleIndex++] = numVertices - 2 - i;
            triangles[triangleIndex++] = numVertices - 1 - i;
        }
        triangles[triangleIndex++] = numVertices - 1;
        triangles[triangleIndex++] = numVertices - segments - 2;
        triangles[triangleIndex++] = numVertices - 2;

        // Generate middle triangles
        for (int i = 0; i < segments; i++)
        {
            int i1 = i + 1;
            for (int j = 0; j < segments; j++)
            {
                int j1 = j + 1;
                int v1 = (segments + 1) * i + j + 1;
                int v2 = (segments + 1) * i + j1 + 1;
                int v3 = (segments + 1) * i1 + j1 + 1;
                int v4 = (segments + 1) * i1 + j + 1;

                triangles[triangleIndex++] = v1;
                triangles[triangleIndex++] = v2;
                triangles[triangleIndex++] = v3;

                triangles[triangleIndex++] = v1;
                triangles[triangleIndex++] = v3;
                triangles[triangleIndex++] = v4;
            }
        }

        mesh.vertices = vertices;
        mesh.triangles = triangles;
        mesh.RecalculateNormals();
    }
}

这段代码将在场景中创建一个胶囊体，并将其网格渲染器的网格设置为通过代码生成的胶囊体网格。