| '''OpenGL extension APPLE.transform_hint |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GL.APPLE.transform_hint to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| The transform_hint extension provides a new target, |
| TRANSFORM_HINT_APPLE, for the Hint procedure. When the |
| transform hint is set to FASTEST the GL may choose to |
| implement certain state dependent algebraic simplifications |
| in the geometry transformation that affect the sub-pixel |
| precision of the transformed vertex coordinates. |
| |
| For example, if two polygons are rendered with identical object |
| coordinates, different GL state settings, and the transform |
| hint set to FASTEST, there is no gaurantee that the resulting |
| window coordinates of the two polygons will be precisely |
| identical. Therefore, precise tests of the window coordinates, |
| such as a depth test setting of EQUAL, should not be used. |
| |
| If the transform hint is set to NICEST or DONT_CARE, two polygons |
| with identical object coordinates will always be transformed |
| to identical window coordinates. |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/APPLE/transform_hint.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.APPLE.transform_hint import * |
| from OpenGL.raw.GL.APPLE.transform_hint import _EXTENSION_NAME |
|
|
| def glInitTransformHintAPPLE(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
|
|
| |
