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:
“The treatment of the incident of the assault upon the sailors of the Baltimore is so conciliatory and friendly that I am of the opinion that there is a good prospect that the differences growing out of that serious affair can now be adjusted upon terms satisfactory to this Government by the usual methods and without special powers from Congress.”
—Benjamin Harrison (1833–1901)
“I want in all cases to do right.”
—Abraham Lincoln (1809–1865)