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'''OpenGL extension ATI.envmap_bumpmap |
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This module customises the behaviour of the |
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OpenGL.raw.GL.ATI.envmap_bumpmap to provide a more |
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Python-friendly API |
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Overview (from the spec) |
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This extension adds environment mapped bump mapping (EMBM) to the GL. |
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The method exposed by this extension is to use a dependent texture |
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read on a bumpmap (du,dv) texture to offset the texture coordinates |
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read into a map on another texture unit. This (du,dv) offset is also |
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rotated through a user-specified rotation matrix to get the texture |
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coordinates into the appropriate space. |
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A new texture format is introduced in order for specifying the (du,dv) |
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bumpmap texture. This map represents -1 <= du,dv <= 1 offsets to |
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be applied to the texture coordinates used to read into the base |
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map. Additionally, the (du,dv) offsets are transformed by a rotation |
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matrix that this extension allows the user to specify. Further, a |
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new color operation is added to EXT_texture_env_combine to specify |
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both that bumpmapping is enabled and which texture unit to apply |
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the bump offset to. |
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The official definition of this extension is available here: |
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http://www.opengl.org/registry/specs/ATI/envmap_bumpmap.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.ATI.envmap_bumpmap import * |
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from OpenGL.raw.GL.ATI.envmap_bumpmap import _EXTENSION_NAME |
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def glInitEnvmapBumpmapATI(): |
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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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glTexBumpParameterivATI=wrapper.wrapper(glTexBumpParameterivATI).setInputArraySize( |
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'param', None |
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) |
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glTexBumpParameterfvATI=wrapper.wrapper(glTexBumpParameterfvATI).setInputArraySize( |
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'param', None |
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) |
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glGetTexBumpParameterivATI=wrapper.wrapper(glGetTexBumpParameterivATI).setOutput( |
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'param',size=_glgets._glget_size_mapping,pnameArg='pname',orPassIn=True |
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) |
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glGetTexBumpParameterfvATI=wrapper.wrapper(glGetTexBumpParameterfvATI).setOutput( |
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'param',size=_glgets._glget_size_mapping,pnameArg='pname',orPassIn=True |
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) |
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