| | '''OpenGL extension WIN.phong_shading |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.WIN.phong_shading to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | WIN_phong_shading enables rendering Phong shaded primitives using OpenGL. |
| | Phong shading is a well known shading technique documented |
| | in most graphics texts. |
| | |
| | As opposed to Gouraud (or smooth) shading, which simply calculates the |
| | normals at the vertices and then interpolates the colors of the pixels, |
| | Phong shading involves interpolating an individual normal for every pixel, |
| | and then applying the shading model to each pixel based on its normal |
| | component. |
| | |
| | While Phong shading requires substantially more computation than does |
| | Gouraud shading, the resulting images are more realistic, especially if the |
| | primitives are large. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/WIN/phong_shading.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.WIN.phong_shading import * |
| | from OpenGL.raw.GL.WIN.phong_shading import _EXTENSION_NAME |
| |
|
| | def glInitPhongShadingWIN(): |
| | '''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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| | |
