PLHLSRGB(3plplot) PLplot API PLHLSRGB(3plplot)NAME
plhlsrgb - Convert HLS color to RGB
SYNOPSIS
plhlsrgb(h, l, s, p_r, p_g, p_b)
DESCRIPTION
Convert HLS color coordinates to RGB.
Redacted form: General: plhlsrgb(h, l, s, p_r, p_g, p_b) Perl/PDL: Not available? Implemented as plhls?
This function is used in example 2.
ARGUMENTS
h (PLFLT, input)
Hue, in degrees on the colour cone (0.0-360.0)
l (PLFLT, input)
Lightness, expressed as a fraction of the axis of the colour cone (0.0-1.0)
s (PLFLT, input)
Saturation, expressed as a fraction of the radius of the colour cone (0.0-1.0)
p_r (PLFLT *, output)
Pointer to red intensity (0.0-1.0) of the colour
p_g (PLFLT *, output)
Pointer to green intensity (0.0-1.0) of the colour
p_b (PLFLT *, output)
Pointer to blue intensity (0.0-1.0) of the colour
AUTHORS
Geoffrey Furnish and Maurice LeBrun wrote and maintain PLplot. This man page was automatically generated from the DocBook source of the
PLplot documentation, maintained by Alan W. Irwin and Rafael Laboissiere.
SEE ALSO
PLplot documentation at http://plplot.sourceforge.net/resources.
August, 2012 PLHLSRGB(3plplot)
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PLSCMAP1LA(3plplot) PLplot API PLSCMAP1LA(3plplot)NAME
plscmap1la - Set color map1 colors using a piece-wise linear relationship
SYNOPSIS
plscmap1la(itype, npts, pos, coord1, coord2, coord3, coord4, rev)
DESCRIPTION
This is a version of plscmap1l(3plplot) that supports alpha transparency. It sets color map1 colors using a piece-wise linear relationship
between position in the color map (from 0 to 1) and position in HLS or RGB color space (see the PLplot documentation) with alpha value (0.0
- 1.0). It may be called at any time.
This function is used in example 30.
ARGUMENTS
itype (PLBOOL, input)
true: RGB, false: HLS.
npts (PLINT, input)
number of control points
pos (PLFLT *, input)
position for each control point (between 0.0 and 1.0, in ascending order)
coord1 (PLFLT *, input)
first coordinate (H or R) for each control point
coord2 (PLFLT *, input)
second coordinate (L or G) for each control point
coord3 (PLFLT *, input)
third coordinate (S or B) for each control point
coord4 (PLFLT *, input)
fourth coordinate, the alpha value for each control point
rev (PLBOOL: *, input)
reverse flag for each control point. (rev[i] refers to the interpolation interval between the i and i + 1 control points).
AUTHORS
Geoffrey Furnish and Maurice LeBrun wrote and maintain PLplot. This man page was automatically generated from the DocBook source of the
PLplot documentation, maintained by Alan W. Irwin and Rafael Laboissiere.
SEE ALSO
PLplot documentation at http://plplot.sourceforge.net/resources.
August, 2012 PLSCMAP1LA(3plplot)
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