a ij@sdZddlmZmZmZddlmZmZddlZddlm Z m Z ddl Tddl m Z dd Z eejd d d d Zeejd d d d ZdS)aOpenGL extension EXT.cull_vertex This module customises the behaviour of the OpenGL.raw.GL.EXT.cull_vertex to provide a more Python-friendly API Overview (from the spec) This extension introduces a method for culling vertexes in object space based on the value of the dot product between the normal at the vertex and a culling eye direction. Culling a polygon by examining its vertexes in object space can be more efficient than screen space polygon culling since the transformation to screen space (which may include a division by w) can be avoided for culled vertexes. Also, vertex culling can be computed before vertexes are assembled into primitives. This is a useful property when drawing meshes with shared vertexes, since a vertex can be culled once, and the resulting state can be used for all primitives which share the vertex. The official definition of this extension is available here: http://www.opengl.org/registry/specs/EXT/cull_vertex.txt )platformconstantarrays) extensionswrapperN)_types_glgets)*)_EXTENSION_NAMEcCsddlm}|tS)z=Return boolean indicating whether this extension is availablerr)OpenGLrZhasGLExtensionr r r W/home/ghrups/robot-bench/.venv/lib/python3.9/site-packages/OpenGL/GL/EXT/cull_vertex.pyglInitCullVertexEXTs rparams)T)sizeZorPassIn)__doc__r rrrrrctypesZ OpenGL.raw.GLrrZOpenGL.raw.GL.EXT.cull_vertexr rZglCullParameterdvEXTZ setOutputZglCullParameterfvEXTr r r rs