A book-matched pair of boards is a pair that is cut from the same log and then glued together. The result is a larger board that has symmetry in the grain from one side to the other. We can approximate this effect by mirroring the texture coordinate. For example, we could use the following in place of the first line of the preceding main function:
vec2 tc = TexCoord; if( tc.s > 0.5 ) tc.s = 1.0 - tc.s; vec4 cyl = Slice * vec4( tc, 0.0, 1.0 );
The following image shows an example of the results:
Get OpenGL 4 Shading Language Cookbook - Third Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
Get Mark Richards’s Software Architecture Patterns ebook to better understand how to design components—and how they should interact.
Dive in for free with a 10-day trial of the O’Reilly learning platform—then explore all the other resources our members count on to build skills and solve problems every day.
Start your free trial Become a member now