A birdcage (or bird cage) is a cage designed to house birds as pets. Antique (or antique-style) birdcages are often popular as collectors' items or as household decor but most are not suitable for housing live birds, being too small, or of unsafe materials or construction.ood quality cages designed for pet birds are more suitable. Most parrot cages are made or wrought iron and painted with a non-toxic paint referred to as powder-coating. However, the newest trend in the market is cages made of solid stainless steel.
A viewport is a 2D rectangle that defines the size of the rendering surface onto which a 3D scene is projected.
A viewport is represented by the Viewport class. The Width and Height properties of the rectangle are used by methods for a variety of calculations such as creating a projection matrix using CreatePerspectiveFieldOfView. Viewport dimensions default to the dimensions of the back buffer, but they can be a different size.