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T-vertices is a term used in Frequent Mesh Problems, www.cs.princeton.edu
/ref>
Some modeling algorithms such as
T-vertices is a term used in computer graphics
Computer graphics deals with generating images and art with the aid of computers. Computer graphics is a core technology in digital photography, film, video games, digital art, cell phone and computer displays, and many specialized applications. ...
to describe a problem that can occur during mesh refinement
In numerical analysis, adaptive mesh refinement (AMR) is a method of adapting the accuracy of a solution within certain sensitive or turbulent regions of simulation, dynamically and during the time the solution is being calculated. When solutions ...
or mesh simplification. The most common case occurs in naive implementations of continuous level of detail, where a finer-level mesh is "sewn" together with a coarser-level mesh by simply aligning the finer vertices on the edges of the coarse polygons
In geometry, a polygon () is a plane figure made up of line segments connected to form a closed polygonal chain.
The segments of a closed polygonal chain are called its '' edges'' or ''sides''. The points where two edges meet are the polygon' ...
. The result is a continuous mesh, however due to the nature of the z-buffer
A z-buffer, also known as a depth buffer, is a type of data buffer used in computer graphics to store the depth information of Fragmentation (computing), fragments. The values stored represent the distance to the camera, with 0 being the closest ...
and certain lighting algorithms
In mathematics and computer science, an algorithm () is a finite sequence of mathematically rigorous instructions, typically used to solve a class of specific problems or to perform a computation. Algorithms are used as specifications for per ...
such as Gouraud shading
Gouraud shading ( ), named after Henri Gouraud (computer scientist), Henri Gouraud, is an interpolation method used in computer graphics to produce continuous shading of surfaces represented by Polygon mesh, polygon meshes. In practice, Gouraud ...
, visual artifacts can often be detected./ref>
Some modeling algorithms such as subdivision surface
In the field of 3D computer graphics, a subdivision surface (commonly shortened to SubD surface or Subsurf) is a curved Computer representation of surfaces, surface represented by the specification of a coarser polygon mesh and produced by a re ...
s will fail when a model contains T-vertices.
References
External links
*{{Commonscatinline Computer graphics