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.. default-domain:: C
color
================================================================================
Header: cglm/color.h
Table of contents (click to go):
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Functions:
1. :c:func:`glm_luminance`
Functions documentation
~~~~~~~~~~~~~~~~~~~~~~~
.. c:function:: float glm_luminance(vec3 rgb)
| averages the color channels into one value
This function uses formula in COLLADA 1.5 spec which is
.. code-block:: text
luminance = (color.r * 0.212671) +
(color.g * 0.715160) +
(color.b * 0.072169)
It is based on the ISO/CIE color standards (see ITU-R Recommendation BT.709-4),
that averages the color channels into one value
Parameters:
| *[in]* **rgb** RGB color
|
