| | '''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 ) |
| |
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| |
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| | |
