oracular (3) glDepthRangeArray.3G.gz

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NAME
       glDepthRangeArray - specify mapping of depth values from normalized device coordinates to window
       coordinates for a specified set of viewports


C SPECIFICATION
       void glDepthRangeArrayv(GLuint first, GLsizei count, const GLdouble *v);


PARAMETERS
       first
           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.


DESCRIPTION
       After 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.


NOTES
       It 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.


ERRORS
       GL_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 GETS
       glGet() with argument GL_DEPTH_RANGE


VERSION SUPPORT
       ┌───────────────────┬───────────────────────────────────────────────────────────────────────┐
       │                   │                OpenGL Version                                         │
       ├───────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │Function           │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
       │/                  │     │     │     │     │     │     │     │     │     │     │     │     │
       │Feature            │     │     │     │     │     │     │     │     │     │     │     │     │
       │Name               │     │     │     │     │     │     │     │     │     │     │     │     │
       ├───────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │glDepthRangeArrayv │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └───────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘


SEE ALSO
       glDepthFunc(), glDepthRange(), glDepthRangeIndexed(), glPolygonOffset(), glViewportArray(), glViewport(),
       removedTypes()


       Copyright © 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/.


       Copyright © 2010-2014 Khronos Group

[FIXME: source]                                    04/26/2024                              GLDEPTHRANGEARRAY(3G)