c# - 如何在 Unity 中编辑网格/顶点

Question

我想编辑一个立方体上的 1 个顶点，但我不知道该怎么做。我试过到处寻找此功能，但找不到解决方案。

这是我想要实现的目标的图像:

Answer 1

http://answers.unity3d.com/questions/14567/editing-mesh-vertices-in-unity.html

这段代码不是我的。波纹管是与上面的链接相同的代码。我只是把它分成两个文件。 (每类一个)

它工作得很好。但是请确保在使用之前保存您的场景，它有点问题。

修改完成后不要忘记离开编辑模式。

你不需要在你正在修改的游戏对象上添加“editMesh”标签，否则当你离开编辑模式时它会被删除。

最后，如果您从 unity 修改一个基元，修改将应用于该基元的每个实例! (如果你把一个立方体换成金字塔，每个立方体都会变成一个金字塔)

为避免制作原始网格的副本，请通过副本更改您在网格渲染器中使用的网格，然后对其进行修改。 (下面是在统一菜单中添加简单复制功能的脚本)

编辑网格.cs

#if UNITY_EDITOR
using UnityEngine;
using System.Collections;

/// <summary>
/// http://answers.unity3d.com/questions/14567/editing-mesh-vertices-in-unity.html
/// </summary>
[AddComponentMenu("Mesh/Vert Handler")]
[ExecuteInEditMode]
public class EditMesh : MonoBehaviour {

    public bool _destroy;

    private Mesh mesh;
    private Vector3[] verts;
    private Vector3 vertPos;
    private GameObject[] handles;

    private const string TAG_HANDLE = "editMesh";

    void OnEnable() {
        mesh = GetComponent<MeshFilter>().sharedMesh; // sharedMesh seem equivalent to .mesh
        verts = mesh.vertices;
        foreach (Vector3 vert in verts) {
            vertPos = transform.TransformPoint(vert);
            GameObject handle = new GameObject(TAG_HANDLE);
            //         handle.hideFlags = HideFlags.DontSave;
            handle.transform.position = vertPos;
            handle.transform.parent = transform;
            handle.tag = TAG_HANDLE;
            handle.AddComponent<EditMeshGizmo>()._parent = this;

        }
    }

    void OnDisable() {
        GameObject[] handles = GameObject.FindGameObjectsWithTag(TAG_HANDLE);
        foreach (GameObject handle in handles) {
            DestroyImmediate(handle);
        }
    }

    void Update() {
        if (_destroy) {
            _destroy = false;
            DestroyImmediate(this);
            return;
        }

        handles = GameObject.FindGameObjectsWithTag(TAG_HANDLE);

        for (int i = 0; i < verts.Length; i++) {
            verts[i] = handles[i].transform.localPosition;
        }

        mesh.vertices = verts;
        mesh.RecalculateBounds();
        mesh.RecalculateNormals();


    }

}

#endif

EditMeshGizmo.cs

#if UNITY_EDITOR
using UnityEngine;
using System.Collections;

/// <summary>
/// http://answers.unity3d.com/questions/14567/editing-mesh-vertices-in-unity.html
/// </summary>
[ExecuteInEditMode]
public class EditMeshGizmo : MonoBehaviour {

    private static float CURRENT_SIZE = 0.1f;

    public float _size = CURRENT_SIZE;
    public EditMesh _parent;
    public bool _destroy;

    private float _lastKnownSize = CURRENT_SIZE;

    void Update() {
        // Change the size if the user requests it
        if (_lastKnownSize != _size) {
            _lastKnownSize = _size;
            CURRENT_SIZE = _size;
        }

        // Ensure the rest of the gizmos know the size has changed...
        if (CURRENT_SIZE != _lastKnownSize) {
            _lastKnownSize = CURRENT_SIZE;
            _size = _lastKnownSize;
        }

        if (_destroy)
            DestroyImmediate(_parent);
    }

    void OnDrawGizmos() {
        Gizmos.color = Color.red;
        Gizmos.DrawCube(transform.position, Vector3.one * CURRENT_SIZE);
    }

}
#endif

CopyMesh.cs(将其放在名为“Editor”的目录中)(然后您应该可以在菜单栏中找到它)

using UnityEditor;
using UnityEngine;

namespace Assets {

    /// <summary>
    /// 
    /// </summary>
    public class CopyMesh : MonoBehaviour {

        [MenuItem("Assets/CopyMesh")]
        static void DoCopyMesh() {
            Mesh mesh = Selection.activeObject as Mesh;
            Mesh newmesh = new Mesh();
            newmesh.vertices = mesh.vertices;
            newmesh.triangles = mesh.triangles;
            newmesh.uv = mesh.uv;
            newmesh.normals = mesh.normals;
            newmesh.colors = mesh.colors;
            newmesh.tangents = mesh.tangents;
            AssetDatabase.CreateAsset(newmesh, AssetDatabase.GetAssetPath(mesh) + " copy.asset");
        }

        [MenuItem("Assets/CopyMeshGameObject")]
        static void DoCopyMeshGameObject() {
            Mesh mesh = (Selection.activeGameObject.GetComponent<MeshFilter>()).sharedMesh;
            Mesh newmesh = new Mesh();
            newmesh.vertices = mesh.vertices;
            newmesh.triangles = mesh.triangles;
            newmesh.uv = mesh.uv;
            newmesh.normals = mesh.normals;
            newmesh.colors = mesh.colors;
            newmesh.tangents = mesh.tangents;
            print(AssetDatabase.GetAllAssetPaths()[0]);
            AssetDatabase.CreateAsset(newmesh, AssetDatabase.GetAllAssetPaths()[0] + "/mesh_copy.asset");
        }
    }
}