private void SetVertex(int i, int x, int y, int z)
{
Vector3 v = new Vector3(x, y, z) * 2f / gridSize - Vector3.one;
float x2 = v.x * v.x;
float y2 = v.y * v.y;
float z2 = v.z * v.z;
Vector3 s;
s.x = v.x * Mathf.Sqrt(1f - y2 / 2f - z2 / 2f + y2 * z2 / 3f);
s.y = v.y * Mathf.Sqrt(1f - x2 / 2f - z2 / 2f + x2 * z2 / 3f);
s.z = v.z * Mathf.Sqrt(1f - x2 / 2f - y2 / 2f + x2 * y2 / 3f);
normals[i] = s;
vertices[i] = normals[i] * Radius;
cubeUV[i] = new Color32((byte)x, (byte)y, (byte)z, 0);
//
var coord = CameraControl.CartesianToPolar(vertices[i]);
float uvX = (coord.y + 180f) / 360f;
float uvY = (coord.x + 90f) / 180f;
_uv[i] = new Vector2(uvX, uvY);
//Debug.Log(vertices[i] + " => " + coord + " => " + _uv[i] + " : " + cubeUV[i]);
}
