INTERP(6D)							    INTERP(6D)

NAME    [Toc]    [Back]

     interp - gamma-corrected color ramp generator

SYNOPSIS    [Toc]    [Back]

     /usr/demos/bin/interp

DESCRIPTION    [Toc]    [Back]

     Interp makes smooth color ranges.	Two color chips	and a Gouraud-shaded
     polygon showing the shade range between them are displayed.  To make a
     color range, start	windows	for showmap, cedit, and	interp.	 Select	the
     color at the lower	(usually darker) end of	the shade range	and use	cedit
     to	set it to the desired value.  Select the color at the top of the shade
     range and edit it as well.

     Now attach	to (select) interp.  Point to the lower	color (usually on
     showmap).	Press and release the left mouse button.  Point	to the high
     color and repeat.	Both the extreme colors	of your	desired	color ramp
     should be in the two large	color chips in the interp window.  If you
     should make an error when selecting the extreme colors for	your ramp,
     just keep trying to use the left mouse button to pick the colors, until
     the two color chips show the proper extreme color indices.

     When the extreme color indices are	correctly chosen (which	is reflected
     in	the color chips), the other colors of the ramp can be interpolated.
     While interp is still selected for	input, press and release the middle
     mouse button.  This interpolates all the colors between the extreme
     colors.

     The resultant color array will be gamma-corrected using the floatingpoint
 constant in ~/.gamma.  If no	such file exists, the gamma constant
     is	1.0.

BUGS    [Toc]    [Back]

     This program must have input focus	in order to work properly.  See	the
     window manager documentation for a	discussion of input focus.


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