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Iterative Stencil Loops (ISLs) or Stencil computations are a class of numerical data processing solution [1] which update array elements according to some fixed pattern, called a stencil. [2] They are most commonly found in computer simulations , e.g. for computational fluid dynamics in the context of scientific and engineering applications.
If say func is GL_NEVER, the stencil test will always fail. Neither Color/Z-buffers are modified. The stencil buffer is modified as per glStencilOp fail. If say glStencilOp(GL_REPLACE, GL_KEEP, GL_KEEP) then GL_REPLACE takes place and stencilValue = (ref & stencilMask) // will become ref 2. Stencil Test Function passes/Depth Test Function fails:
In computer programming, reusability describes the quality of a software asset that affects its ability to be used in a software system for which is was not specifically designed. An asset that is easy to reuse and provides utility is considered to have high reusability.
Ad hoc code reuse has been practiced from the earliest days of programming.Programmers have always reused sections of code, templates, functions, and procedures. Software reuse as a recognized area of study in software engineering, however, dates only from 1968 when Douglas McIlroy of Bell Laboratories proposed basing the software industry on reusable components.
A stencil is a template used to draw or paint identical letters, symbols, shapes, or patterns every time it is used. The design produced by such a template is also called a stencil. It may also refer to: Stencil buffer, used in 3D computer graphics; Stencil code, a class of algorithms; Stencil graffiti, stencils used in street art
stencil; alpha; window ID; As a scene is drawn, drawing primitives (the basic elements of graphics output, such as points, lines, circles, text etc. [1]) are rasterized into fragments which are textured and combined with the existing frame buffer. How a fragment is combined with the data already in the frame buffer depends on various settings.
In computer graphics, graphics software refers to a program or collection of programs that enable a person to manipulate images or models visually on a computer. [ 1 ] Computer graphics can be classified into two distinct categories: raster graphics and vector graphics , with further 2D and 3D variants.
Example of Carmack's stencil shadowing in Doom 3. Shadow volume is a technique used in 3D computer graphics to add shadows to a rendered scene. It was first proposed by Frank Crow in 1977 [1] as the geometry describing the 3D shape of the region occluded from a light source. A shadow volume divides the virtual world in two: areas that are in ...