GLDEPTHRANGEINDEXED - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
Source : [FIXME: source]
Note : [FIXME: manual]
NAMEglDepthRangeIndexed − specify mapping of depth values from normalized device coordinates to window coordinates for a specified viewport
C SPECIFICATIONvoid glDepthRangeIndexed(GLuint index, GLdouble nearVal, GLdouble farVal);
PARAMETERSindex Specifies the index of the viewport whose depth range to update​. nearVal Specifies the mapping of the near clipping plane to window coordinates​. The initial value is 0​. farVal Specifies the mapping of the far clipping plane to window coordinates​. The initial value is 1​.
DESCRIPTIONAfter clipping and division by w, depth coordinates range from −1 to 1, corresponding to the near and far clipping planes​. Each viewport has an independent depth range specified as a linear mapping of the normalized depth coordinates in this range to window depth coordinates​. Regardless of the actual depth buffer implementation, window coordinate depth values are treated as though they range from 0 through 1 (like color components)​. glDepthRangeIndexed specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates for a specified viewport​. Thus, the values accepted by glDepthRangeIndexed are both clamped to this range before they are accepted​. The index parameter specifies the index of first viewport whose depth range to modify and must be less than the value of GL_MAX_VIEWPORTS​. nearVal and farVal specify near and far values of the depth range for the specified viewport, respectively​. The setting of (0,1) maps the near plane to 0 and the far plane to 1​. With this mapping, the depth buffer range is fully utilized​.
NOTESIt is not necessary that the near plane distance be less than the far plane distance​. Reverse mappings such as nearVal = 1, and farVal = 0 are acceptable​. The type of the nearVal and farVal parameters was changed from GLclampd to GLdouble​. This change is transparent to user code and is described in detail on the removedTypes() page​.
ERRORSGL_INVALID_VALUE is generated if index is greater than or equal to the value of GL_MAX_VIEWPORTS​.
ASSOCIATED GETSglGet() with argument GL_DEPTH_RANGE
VERSION SUPPORT OpenGL Version Function / Feature Name 2​.0 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 2​.1 3​.0 3​.1 3​.2 3​.3 4​.0 4​.1 4​.2 4​.3 4​.4 4​.5 glDepthRangeIndexed − − − − − − − ✔ ✔ ✔ ✔ ✔
SEE ALSOglDepthFunc(), glDepthRange(), glDepthRangeArray(), glPolygonOffset(), glViewportArray(), glViewport(), removedTypes()
COPYRIGHTCopyright © 2010−2014 Khronos Group​. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1​.0, 8 June 1999​. http://opencontent​.org/openpub/​.
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Copyright © 2010-2014 Khronos Group
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