在Unity3d中翻转3D Gameobjects

Question

有没有办法在Unity3d中翻转(镜像)3D GameObject？

我想使用Unity Game-engine功能翻转其中一个3D GameObjects

Answer 1

是的,翻转一个物体并不是那么难.这是我的代码的两个片段,实现了这一点(我省略了抓取网格参考的明显样板):

    public bool flipX = true;
    public bool flipY;
    public bool flipZ;


 void Flip()
    {
        if (mesh == null) return;
        Vector3[] verts = mesh.vertices;
        for (int i = 0; i < verts.Length; i++)
        {
            Vector3 c = verts[i];
            if (flipX) c.x *= -1;
            if (flipY) c.y *= -1;
            if (flipZ) c.z *= -1;
            verts[i] = c;
        }

        mesh.vertices = verts;
        if (flipX ^ flipY ^ flipZ) FlipNormals();
    }

一个重要的细节是,根据轴配置,您可能需要翻转面法线.这是通过反转三角形数组中引用顶点的顺序来实现的:

    void FlipNormals()
    {
        int[] tris = mesh.triangles;
        for (int i = 0; i < tris.Length / 3; i++)
        {
            int a = tris[i * 3 + 0];
            int b = tris[i * 3 + 1];
            int c = tris[i * 3 + 2];
            tris[i * 3 + 0] = c;
            tris[i * 3 + 1] = b;
            tris[i * 3 + 2] = a;
        }
        mesh.triangles = tris;
    }