private void AddCube(BoardObject obj, int x, int y, float z)
{
Vector3 a = GetVertexPosition(x, y, z);
Vector3 b = GetVertexPosition(x, y + 1, z);
Vector3 c = GetVertexPosition(x + 1, y, z);
Vector3 d = GetVertexPosition(x + 1, y + 1, z);
// front
obj.AddFace(a, b, c, d);
Vector3 e = GetVertexPosition(x, y, z + boardSettings.boardDepth);
Vector3 f = GetVertexPosition(x, y + 1, z + boardSettings.boardDepth);
Vector3 g = GetVertexPosition(x + 1, y, z + boardSettings.boardDepth);
Vector3 h = GetVertexPosition(x + 1, y + 1, z + boardSettings.boardDepth);
// left
if (IsFaceVisible(x, y, -1, 0))
{
obj.AddFace(a, e, b, f);
}
// top
if (IsFaceVisible(x, y, 0, 1))
{
obj.AddFace(b, f, d, h);
}
// right
if (IsFaceVisible(x, y, 1, 0))
{
obj.AddFace(d, h, c, g);
}
// bottom
if (IsFaceVisible(x, y, 0, -1))
{
obj.AddFace(c, g, a, e);
}
}