Bilinear Filtering - Special Cases

Special Cases

Textures aren't infinite, in general, and sometimes one ends up with a pixel coordinate that lies outside the grid of texel coordinates. There are a few ways to handle this:

  • Wrap the texture, so that the last texel in a row also comes right before the first, and the last texel in a column also comes right above the first. This works best when the texture is being tiled.
  • Make the area outside the texture all one color. This may be of use for a texture designed to be laid over a solid background or to be transparent.
  • Repeat the edge texels out to infinity. This works best if the texture is not designed to be repeated.

Read more about this topic:  Bilinear Filtering

Famous quotes containing the words special and/or cases:

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    Fred M. Rogers, U.S. writer and host of Mr. Rogers Neighborhood. “That Which is Essential Is Invisible to the Eye,” Young Children (July 1994)

    For the most part, we are not where we are, but in a false position. Through an infirmity of our natures, we suppose a case, and put ourselves into it, and hence are in two cases at the same time, and it is doubly difficult to get out.
    Henry David Thoreau (1817–1862)