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