transform_feedback.py :  » Game-2D-3D » PyOpenGL » PyOpenGL-3.0.1 » OpenGL » GL » EXT » Python Open Source

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Python Open Source » Game 2D 3D » PyOpenGL 
PyOpenGL » PyOpenGL 3.0.1 » OpenGL » GL » EXT » transform_feedback.py
'''OpenGL extension EXT.transform_feedback

This module customises the behaviour of the 
OpenGL.raw.GL.EXT.transform_feedback to provide a more 
Python-friendly API

Overview (from thespec import 
  
  This extension provides a new mode to the GL, called transform feedback,
  which records selected vertex attributes for each primitive processed by
  the GL.  The selected attributes are written into buffer objects, and can
  be written with each attribute in a separate buffer object or with all
  attributes interleaved into a single buffer object.  If a geometry shader
  is active, the primitives recorded are those emitted by the geometry
  shader.  Otherwise, transform feedback captures primitives whose vertices
  are transformed by a vertex shader.  In either case, the primitives
  captured are those generated prior to clipping.  Transform feedback mode
  captures the values of specified varying variables emitted from GLSL import 
  vertex or geometry shaders.
  
  The vertex data recorded in transform feedback mode is stored into buffer
  objects as an array of vertex attributes.  The regular representation and
  the use of buffer objects allows the recorded data to be processed
  directly by the GL without requiring CPU intervention to copy data.  In
  particular, transform feedback data can be used for vertex arrays (via
  vertex buffer objects), as the source for pixel data (via pixel buffer
  objects), as shader constant data (via the NV_parameter_buffer_object or
  EXT_bindable_uniform extensions), or via any other extension that makes
  use of buffer objects.
  
  This extension introduces new query object support to allow transform
  feedback mode to operate asynchronously.  Query objects allow applications
  to determine when transform feedback results are complete, as well as the
  number of primitives processed and written back to buffer objects while in
  transform feedback mode.  This extension also provides a new rasterizer
  discard enable, which allows applications to use transform feedback to
  capture vertex attributes without rendering anything.

The official definition of this extension is available here:
http://www.opengl.org/registry/specs/EXT/transform_feedback.txt
'''
from OpenGL import platform,constants,constant,arrays
from OpenGL import extensions,wrapper
from OpenGL.GL import glget
import ctypes
from OpenGL.raw.GL.EXT.transform_feedback import *
### END AUTOGENERATED SECTION
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