Usage Example
In the simplest case for generating texture coordinates, suppose:
- The map has been created as above, looking at the sphere along the z-axis.
- The texture coordinate of the center of the map is (0,0), and the sphere's image has radius 1.
- We are rendering an image in the same exact situation as the sphere, but the sphere has been replaced with a reflective object.
- The image being created is orthographic, or the viewer is infinitely far away, so that the view direction does not change as one moves across the image.
At texture coordinate, note that the depicted location on the sphere is (where z is ), and the normal at that location is also . However, we are given the reverse task (a normal for which we need to produce a texture map coordinate). So the texture coordinate corresponding to normal is .
Read more about this topic: Sphere Mapping
Famous quotes containing the word usage:
“Girls who put out are tramps. Girls who don’t are ladies. This is, however, a rather archaic usage of the word. Should one of you boys happen upon a girl who doesn’t put out, do not jump to the conclusion that you have found a lady. What you have probably found is a lesbian.”
—Fran Lebowitz (b. 1951)
“Pythagoras, Locke, Socrates—but pages
Might be filled up, as vainly as before,
With the sad usage of all sorts of sages,
Who in his life-time, each was deemed a bore!
The loftiest minds outrun their tardy ages.”
—George Gordon Noel Byron (1788–1824)