What is the Bitmap OpenGL®?

Bitmap OpenGL® can be one of two things, depending on the context in which this term is used. The original meaning of the bitmap is a picture in which each pixel location is a little stored, giving it a transparent or fixed value. After the introduction of certain image file formats, the term “bitmap” also meant full color images stored in a certain format and finally digital images in general. At the source code level, the BitMap OpenGL® has its original meaning, and the simplified image is most often used to create a mask of transparency, display text or icons, or to act as a texture or simple overlap. When the term is used to indicate any digital image, they are most often used as two -dimensional (2D) textures to be mapped on polygons. Bitmap consists of fair and false value, so it can be used to create very accurate characters, although no internal information about the color can be included in the file. This accuracy and simplicity madeBitmap one of the most used methods for creating, storage and representation of symbols, icons and almost any graphic detail that only requires information about whether or not it is.

common use for OpenGL® bitmap is to display text within the scene. This is because there is a wide range of bitmaps. In the easiest implementation, inside the scene is formed by a quadrilateral and the characters of the bitmap font are composted to shape to create words and sentences. Bitmap image areas that are false are transparent, which means that the background is displayed. Another advantage is that the text will rotate with the scene if desired, or it may be constantly translated to face the camera and provide a certain type of head, the persistent display.

Another use for OpenGL® bitmap is to create a transparent mask. This is the same concept as the font, except the bitmap used to createThe three -dimensional (3D) shapes are transparent, which effectively provides the ability to cut shapes from primitive types that could be difficult or impossible to do with a 3D model. This technique is sometimes used to represent trees in a scene where the detail of branches and leaves could be otherwise difficult. Normal, full -color texture is usually mapped on the top of the transparency mask to complete the illusion.