GLDEPTHRANGEARRAY - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
Source : [FIXME: source]
Note : [FIXME: manual]
NAMEglDepthRangeArray − specify mapping of depth values from normalized device coordinates to window coordinates for a specified set of viewports
C SPECIFICATIONvoid glDepthRangeArrayv(GLuint first, GLsizei count, const GLdouble *v);
PARAMETERSfirst Specifies the index of the first viewport whose depth range to update​. count Specifies the number of viewports whose depth range to update​. v Specifies the address of an array containing the near and far values for the depth range of each modified viewport​.
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)​. glDepthRangeArray specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates for each viewport in the range [first, first + count)​. Thus, the values accepted by glDepthRangeArray are both clamped to this range before they are accepted​. The first parameter specifies the index of the first viewport whose depth range to modify and must be less than the value of GL_MAX_VIEWPORTS​. count specifies the number of viewports whose depth range to modify​. first + count must be less than or equal to the value of GL_MAX_VIEWPORTS​. v specifies the address of an array of pairs of double precision floating point values representing the near and far values of the depth range for each viewport, in that order​. 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 near = 1, and far = 0 are acceptable​. The type of the v parameter 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 first is greater than or equal to the value of GL_MAX_VIEWPORTS​. GL_INVALID_VALUE is generated if first + count 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 glDepthRangeArrayv − − − − − − − ✔ ✔ ✔ ✔ ✔
SEE ALSOglDepthFunc(), glDepthRange(), glDepthRangeIndexed(), 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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