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:
“Navarette, a Chinese missionary, agrees with Leibniz and says that “It is the special providence of God that the Chinese did not know what was done in Christendom; for if they did, there would be never a man among them, but would spit in our faces.””
—Matthew Tindal (1653–1733)
“The world men inhabit ... is rather bleak. It is a world full of doubt and confusion, where vulnerability must be hidden, not shared; where competition, not co-operation, is the order of the day; where men sacrifice the possibility of knowing their own children and sharing in their upbringing, for the sake of a job they may have chosen by chance, which may not suit them and which in many cases dominates their lives to the exclusion of much else.”
—Anna Ford (b. 1943)