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OpenGL® programming is a method of creating CGI through code, used to make 2D or 3D images in video games. It involves planning, creating code for objects and effects, establishing textures and assigning lights and effects. This approach allows for easy recognition and replication on different computer systems.
OpenGL® programming is a process by which someone creates Computer-Generated Imagery (CGI) through code rather than through a program that has a graphics toolset. This process often involves creating code that performs a number of different processes, which in turn is used by the software to display the images. Someone can use OpenGL® programming to create two-dimensional (2D) images or three-dimensional (3D) images, both of which are often used in video games. Creating CGI through these programs often involves using a variety of programming methods and a large amount of code to dictate how objects should look and act within an environment.
Various CGI elements or computer-generated images can be created through the use of OpenGL® programming. This process often begins with the creation of a design document or other work that allows a programmer to fully understand what he or she needs to create in OpenGL®. At this point, the programmer can begin planning the OpenGL® programming process that she must use to create the objects and effects used within the scene. Computer code is then created by that programmer, which is used by the software to reproduce the different elements of a CGI scene.
Both 2D or two-dimensional and 3D or three-dimensional objects and scenes can be created using OpenGL® programming, depending on the approach taken by the programmer. In its simplest form, a person can use code to indicate where points in space should be located, using the axes that are often used to plot graphs in mathematics. These single points established in OpenGL® programming are called vertices. Each can be connected to other points by lines, which can then create different shapes, and these shapes can create 2D images or be connected to each other to form the surface of a 3D object.
Further OpenGL® programming is then used to establish different types of textures that can be applied to objects within a scene. These textures are 2D images that are basically wrapped around 3D objects, a process called texture mapping, which makes objects look more realistic and gives them more variation. OpenGL® programming is used for all of these processes, as well as creating and assigning lights in a scene and effects such as fog, fire and water. The benefit of using this type of approach is that objects created through such programming can be easily recognized and replicated by numerous computer systems, allowing the software to run on different hardware configurations more easily.
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