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.