无法在运行时从网格创建中组合网格答案

【问题标题】：Can't combine mesh from mesh create on runtime无法在运行时从网格创建中组合网格
【发布时间】：2019-07-19 12:58:20
【问题描述】：

我有这个代码：

public void BrowseColliderToCreateMesh (PolygonCollider2D polygonColliderAdded){
    //browse all path from collider
    pathCount=polygonColliderAdded.pathCount;
    CombineInstance[] combine = new CombineInstance[pathCount];

    for (int i = 0; i < pathCount; i++)
    {
        Vector2[] path = polygonColliderAdded.GetPath(i);
        Polygon2D polygon = Polygon2D.Contour(path);
        Triangulation2D triangulation = new Triangulation2D(polygon, 22.5f);
        // build a mesh from triangles in a Triangulation2D instance
        singleMesh = triangulation.Build();
        combine[i].mesh = singleMesh;
    }

    testDelaunay.GetComponent<MeshFilter>().mesh = new Mesh;
    testDelaunay.GetComponent<MeshFilter>().mesh.CombineMeshes(combine);
}

1- 我有一个来自 polygonCollider2D 的点列表，分为 3： 2-我遍历这些路径以使用 Delaunay 生成网格。对于 1 个网格，它工作得很好，但我找不到组合它的方法。

unity 的示例使用我没有的其他一些子游戏对象...

有人有解决办法吗？

【问题讨论】：

标签： c# unity3d mesh

【解决方案1】：

我终于找到了一些没有优化但有效的东西：

private Mesh CombineMeshes(List<Mesh> meshes)
    {
        var combine = new CombineInstance[meshes.Count];
        for (int i = 0; i < meshes.Count; i++)
        {
            combine[i].mesh = meshes[i];
            combine[i].transform = transform.localToWorldMatrix;
        }

        var mesh = new Mesh();
        mesh.CombineMeshes(combine);
        return mesh;
    }


public void BrowseColliderToCreateMesh (PolygonCollider2D polygonColliderAdded){
    pathCount=polygonColliderAdded.pathCount;
    for (int i = 0; i < pathCount; i++)
    {
        if(i==0){
        Vector2[] path = polygonColliderAdded.GetPath(i);
        Polygon2D polygon = Polygon2D.Contour(path);
        Triangulation2D triangulation = new Triangulation2D(polygon, 22.5f);
        // build a mesh from triangles in a Triangulation2D instance
        singleMesh = triangulation.Build();
        }else if (i==1){
        Vector2[] path = polygonColliderAdded.GetPath(i);
        Polygon2D polygon = Polygon2D.Contour(path);
        Triangulation2D triangulation = new Triangulation2D(polygon, 22.5f);
        // build a mesh from triangles in a Triangulation2D instance
        newMesh = triangulation.Build();
        combineMesh=CombineMeshes(new List<Mesh> { newMesh, singleMesh });
        }else if(i>1){
            Vector2[] path = polygonColliderAdded.GetPath(i);
            Polygon2D polygon = Polygon2D.Contour(path);
            Triangulation2D triangulation = new Triangulation2D(polygon, 22.5f);
            newMesh = triangulation.Build();
            combineMesh=CombineMeshes(new List<Mesh> { newMesh, combineMesh });
        }
    }
GetComponent<MeshFilter>().mesh = combineMesh;
}

【讨论】：