1al_color_lch(3)                                                al_color_lch(3)
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NAME

6       al_color_lch - Allegro 5 API
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SYNOPSIS

9              #include <allegro5/allegro_color.h>
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11              ALLEGRO_COLOR al_color_lch(float l, float c, float h)
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DESCRIPTION

14       Return  an  ALLEGRO_COLOR(3) structure from CIE LCH values.  LCH colors
15       are very similar to HSL, with the same meaning of L and H and C  corre‐
16       sponding  to  S.   However  LCH is more visually uniform.  Furthermore,
17       this function expects the angle for H in radians and not in degree.
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19       The CIE LCH color space is a cylindrical representation of  the  L*a*b*
20       color space.  The L component is the same and C and H are computed like
21       this:
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23              C = sqrt(a * a + b * b)
24              H = atan2(b, a)
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SINCE

27       5.2.3
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SEE ALSO

30       al_color_lch_to_rgb(3), al_color_rgb_to_lch(3)
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34Allegro reference manual                                       al_color_lch(3)
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