unity 通过脚本生成 mesh 半球体
时间: 2023-05-16 09:07:27 浏览: 117
可以使用以下代码生成半球体的 Mesh:
```csharp
public Mesh GenerateHalfSphereMesh(float radius, int segments, int rings)
{
Mesh mesh = new Mesh();
List<Vector3> vertices = new List<Vector3>();
List<int> triangles = new List<int>();
float segmentAngle = Mathf.PI / segments;
float ringAngle = Mathf.PI / (2 * rings);
for (int ring = 0; ring <= rings; ring++)
{
float y = Mathf.Sin(ring * ringAngle);
float xzRadius = Mathf.Cos(ring * ringAngle);
for (int segment = 0; segment <= segments; segment++)
{
float x = xzRadius * Mathf.Sin(segment * segmentAngle);
float z = xzRadius * Mathf.Cos(segment * segmentAngle);
vertices.Add(new Vector3(x, y, z) * radius);
}
}
for (int ring = 0; ring < rings; ring++)
{
for (int segment = 0; segment < segments; segment++)
{
int index = ring * (segments + 1) + segment;
triangles.Add(index);
triangles.Add(index + segments + 1);
triangles.Add(index + 1);
triangles.Add(index + 1);
triangles.Add(index + segments + 1);
triangles.Add(index + segments + 2);
}
}
mesh.vertices = vertices.ToArray();
mesh.triangles = triangles.ToArray();
mesh.RecalculateNormals();
return mesh;
}
```
这个函数接受三个参数:半径、分段数和环数。它返回一个 Mesh 对象,可以将其赋值给 MeshFilter 组件的 mesh 属性,或者使用 Graphics.DrawMesh() 函数进行绘制。