| '''OpenGL extension SGIS.fog_function |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GL.SGIS.fog_function to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| This extension allows to define application-specific fog blend-factor |
| function. Function is defined by the set of the "control" points and |
| should be monotonic. Each control point represented as a pair of the |
| eye-space distance value and corresponding value of the fog blending |
| factor. The minimum number of control points is one. The maximum |
| number is implementation dependent. |
| |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/SGIS/fog_function.txt |
| ''' |
| from OpenGL import platform, constant, arrays |
| from OpenGL import extensions, wrapper |
| import ctypes |
| from OpenGL.raw.GL import _types, _glgets |
| from OpenGL.raw.GL.SGIS.fog_function import * |
| from OpenGL.raw.GL.SGIS.fog_function import _EXTENSION_NAME |
|
|
| def glInitFogFunctionSGIS(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
| |
| glFogFuncSGIS=wrapper.wrapper(glFogFuncSGIS).setInputArraySize( |
| 'points', None |
| ) |
| glGetFogFuncSGIS=wrapper.wrapper(glGetFogFuncSGIS).setOutput( |
| 'points',size=_glgets._glget_size_mapping,pnameArg='',orPassIn=True |
| ) |
| |
