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+.ig
+
+color_transitions.roff
+
+This file is part of groff, the GNU roff type-setting system.
+
+Copyright (C) 2005-2020 Free Software Foundation, Inc.
+written by Joachim Walsdorff <Joachim.Walsdorff@urz.uni-heidelberg.de>.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+..
+.
+.if !d sopath \
+. ds sopath
+.
+.so \*[sopath]examples/common.roff
+.
+.de ctab
+.nr #cc 0
+.PN 21 ".nr #cc +.05f" ".defcolor \En[t*#] rgb \\$1 \\$2 \\$3" ".TBL border= csp=0 cpd=.5n bgc=\\\\n[t*#] bc=" .TR .TD
+.PN 21 .ETB
+..
+.PN 30 Before table.
+.TBL cols=3 width=33% border= csp=0 cpd=0 bgc=
+.CPTN val=b Color Transitions
+.TR
+.TD ".ctab 0+\En[#cc]u \En[#cc]u \En[#cc]u" \" black -> white
+.TD ".ctab 1f-\En[#cc]u 1f-\En[#cc]u 1f-\En[#cc]u"\" white -> black
+.TD ".ctab 1f \En[#cc]u \En[#cc]u" \" red -> white
+.TR
+.TD ".ctab 0 1f-\En[#cc]u \En[#cc]u" \" green -> blue
+.TD ".ctab 1f 1f-\En[#cc]u 1f" \" white -> magenta
+.TD ".ctab 1f \En[#cc]u 1f" \" magenta -> white
+.TR
+.TD ".ctab 0+\En[#cc]u \En[#cc]u 1f-\En[#cc]u" \" blue -> yellow
+.TD ".ctab 1f-\En[#cc]u 1f-\En[#cc]u \En[#cc]u" \" yellow -> blue
+.TD ".ctab 1f 0+\En[#cc]u 0" \" red -> yellow
+.xTD ".ctab 0+\En[#cc]u 1f-\En[#cc]u 1f-\En[#cc]u"\" cyan -> red
+.ETB
+.PN 30 After table.
+.
+.\" Local Variables:
+.\" mode: nroff
+.\" fill-column: 72
+.\" End:
+.\" vim: set filetype=groff textwidth=72: