Search: in
Wrapping (graphics)
Wrapping (graphics) in Encyclopedia Encyclopedia
  Tutorials     Encyclopedia     Videos     Books     Software     DVDs  
       





Wrapping (graphics)

In computer graphics, wrapping is the process of limiting a position to an area. A good example of wrapping is wallpaper, a single pattern repeated indefinitely over a wall. Wrapping is used in 3D computer graphics to repeat a texture over a polygon, eliminating the need for large textures or multiple polygons.

To wrap a position x to an area of width w, calculate the value x' \equiv x \pmod{w}.

Implementation

For computational purposes the wrapped value x of x can be expressed as

x' = x - \lfloor (x - x_{min}) / (x_{max} - x_{min}) \rfloor * (x_{max} - x_{min})

where x_{max} is the highest value in the range, and x_{min} is the lowest value in the range.

Pseudocode for wrapping of a value to a range other than 0-1 is function wrap(X, Min, Max: Real): Real; X := X - Int((X - Min) / (Max - Min)) * (Max - Min); if X < 0 then //This corrects the problem caused by using Int instead of Floor X := X + Max - Min; return X;

Pseudocode for wrapping of a value to a range of 0-1 is function wrap(X: Real): Real; X := X - Int(X); if X < 0 then X := X + 1; return X;

Pseudocode for wrapping of a value to a range of 0-1 without branching is, function wrap(X: Real): Real; return ((X mod 1.0) + 1.0) mod 1.0;

See also






Source: Wikipedia | The above article is available under the GNU FDL. | Edit this article



Search for Wrapping (graphics) in Tutorials
Search for Wrapping (graphics) in Encyclopedia
Search for Wrapping (graphics) in Videos
Search for Wrapping (graphics) in Books
Search for Wrapping (graphics) in Software
Search for Wrapping (graphics) in DVDs
Search for Wrapping (graphics) in Store




Advertisement




Wrapping (graphics) in Encyclopedia
Wrapping_(graphics) top Wrapping_(graphics)

Home - Add TutorGig to Your Site - Disclaimer

©2011-2013 TutorGig.info All Rights Reserved. Privacy Statement