July 2012
Intermediate to advanced
712 pages
24h 57m
English
Content preview from OpenGL Insights
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Programmable Vertex Pulling
Daniel R
´
akos
21.1 Introduction
OpenGL and today’s GPUs provide a high degree of flexibility for acquiring
geometry-related information from auxiliary buffers using the shader built-in con-
stants provided by GLSL based on data granularity. The name gl
VertexID pro-
vides the index of the currently processed vertex, gl
PrimitiveID,whichprovides
the index of the currently processed geometric primitive, and gl
InstanceID pro-
vides the index of the currently processed instance of an instanced draw command.
Still, there are restrictions on how object information can be passed to the graphics
pipeline if we use traditional methods ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.