| '''OpenGL extension NVX.conditional_render |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GL.NVX.conditional_render to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| This extension provides support for conditional rendering based on the |
| results of an occlusion query. This mechanism allows an application to |
| potentially reduce the latency between the completion of an occlusion |
| query and the rendering commands depending on its result. It additionally |
| allows the decision of whether to render to be made without application |
| intervention. |
| |
| This extension defines two new functions, BeginConditionalRenderNVX and |
| EndConditionalRenderNVX, between which rendering commands may be discarded |
| based on the results of an occlusion query. If the specified occlusion |
| query returns a non-zero value, rendering commands between these calls are |
| executed. If the occlusion query returns a value of zero, all rendering |
| commands between the calls are discarded. |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/NVX/conditional_render.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.NVX.conditional_render import * |
| from OpenGL.raw.GL.NVX.conditional_render import _EXTENSION_NAME |
|
|
| def glInitConditionalRenderNVX(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
|
|
| |
