Texture Filtering
- Tags
- opengl
Texture coordinates are specified not on pixel resolution, but as a continuous floating point value. Texture filtering is how OpenGL resolves ambiguous pixel specifications while sampling. If you point to 0.5 and that's not right in the center of a pixel, which color do you use at that point?
| Kind | Meaning |
|---|---|
| GL_NEAREST | Pick the nearest pixel at that point in the texture. |
| GL_LINEAR | Interpolates between the point and its surrounding pixels. |
Filters can be declared independently for magnifying (zoom-in) and minifying (zoom-out) operations.
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);