Unity NGUI

NGUI 自定义 Mesh (五维属性图的制作)

为什么要自定义Mesh,有以下一些好处:
1.很多时候在游戏开发中我们可以通过2分图，4分图来实现对包大小的进一步压缩.
2.满足一些游戏功能，比如地图，五维属性图之类。

Create Mesh

Mesh 构成

create trangle //创建一个最基本的三角形

public Mesh mMesh;            // First generated mesh
public MeshFilter mFilter;    // Mesh filter for this draw call

void CreateTrangle() 
{
    mMesh = new Mesh();
    //mMesh.hideFlags = HideFlags.DontSave;
    mMesh.MarkDynamic();
    //1   2 
    //0   3
    Vector3[] verts = new Vector3[3];
    Vector2[] uvs = new Vector2[verts.Length];
    int vert_index = 0;
    int uv_index = 0;
    for (int i = 0; i < verts.Length; i += 4)
    {
        verts[vert_index++] = new Vector3(0, 0, 0); //top-left
        verts[vert_index++] = new Vector3(0, 1, 0); //bottom-left
        verts[vert_index++] = new Vector3(1, 1, 0); //top-right

        uvs[uv_index++] = new Vector2(0, 0);
        uvs[uv_index++] = new Vector2(0, 1);
        uvs[uv_index++] = new Vector2(1, 1);
    }


    int[] triangles = new int[(verts.Length >> 1) * 3];
    int triangle_index = 0;
    for (int i = 0; i < verts.Length; i += 4)
    {
        triangles[triangle_index++] = i;
        triangles[triangle_index++] = i + 1;
        triangles[triangle_index++] = i + 2;
    }

    mMesh.vertices = verts;
    mMesh.uv = uvs;
    mMesh.triangles = triangles;
    ////Shader wants normals, but the mesh  doesn't have them
    mMesh.RecalculateNormals();

    mFilter.mesh = mMesh;
}

Desgin Hexagon Mesh

void UpdateGeometryV2()
{
    mMesh = new Mesh();
    //mMesh.hideFlags = HideFlags.DontSave;
    mMesh.MarkDynamic();

    //1   2 
    //0   3
    BetterList<Vector3> verts = new BetterList<Vector3>();
    BetterList<Vector2> uvs = new BetterList<Vector2>();
    BetterList<int> triangles = new BetterList<int>();
    int panel_count = 5;
    for (int i = 0; i < panel_count; i++)
    {
        verts.Add(Vector3.zero);
        verts.Add(Quaternion.AngleAxis(-72.0f * i, Vector3.forward) * Vector3.up);
        verts.Add(Quaternion.AngleAxis(-72.0f * (i+1), Vector3.forward) * Vector3.up);
        //verts.Add(Vector3.up * Quaternion.);
        //verts.Add(new Vector3(0, 0, 0)); //top-left
        //verts.Add(new Vector3(0, 1, 0)); //bottom-left
        //verts.Add(new Vector3(1, 1, 0)); //top-right

        uvs.Add(new Vector2(0, 0));
        uvs.Add(new Vector2(0, 1));
        uvs.Add(new Vector2(1, 1));

        triangles.Add(3 * i);
        triangles.Add(3 * i + 1);
        triangles.Add(3 * i + 2);
    }

    mMesh.vertices = verts.ToArray();
    mMesh.uv = uvs.ToArray();
    mMesh.triangles = triangles.ToArray();
    //GenerateCachedIndexBuffer(verts.size, (verts.size >> 1) * 3);
    mMesh.RecalculateNormals();

    mFilter.mesh = mMesh;
}

Integrate To NGUI

UIDrawCall.cs

Debug.LogError("UIWidgets must fill the buffer with 4 vertices per quad. Found " + count);

思考

考虑重构UIDrwaCall 实现三角形