GSET_LINE_COLR_IND(3NCARG)

💖 GSET_LINE_COLR_IND 💖

okay bestie, so this is a page from the NCAR GRAPHICS manual, and it lives in section 3NCARG — that's the part of the library where all the C-binding GKS graphics calls hang out. sit down, grab a boba, and let's talk about making your polylines a whole new color. 🎀

✨ NAME ✨

gset_line_colr_ind (Polyline color index) — sets the polyline color index. that's it, that's the whole job. it picks which color your lines are gonna be. 💅

🦋 SYNOPSIS 🦋

#include <ncarg/gks.h>

void gset_line_colr_ind(Gint line_colr_ind);

🌸 DESCRIPTION 🌸

• line_colr_ind — (Input) a color index. just a lil number that says "this color pls". ✨

💜 USAGE 💜

okay so here's the tea. every line you draw with the gpolyline output primitive gets drawn in the color associated with the index line_colr_ind — and it stays that color until you call gset_line_colr_ind again and hand it a new index. so yeah, it's a "set it and forget it until you change your mind" kinda situation. 🫶

now for the lore. for all GKS output primitives, color gets assigned using a color index. these indices run from 0 to 255, where:

• 0 is the background color index 🌙
• 1 is the foreground color index ☀️

the actual color values get hooked up to those indices by calling the GKS routine gset_colr_rep. and here's the plot twist — if you use a color index that has no user-assigned color value set in a gset_colr_rep call, then a device-dependent color value gets assigned to that index instead. so like, you didn't pick it, your device picked it. no cap. 🙈

🔥 ACCESS 🔥

to use the GKS C-binding routines, you gotta load the ncarg_gks and ncarg_c libraries. both of them. don't skip one, bestie. 😭

👑 SEE ALSO 👑

Online:

• gpolyline(3NCARG)
• gset_linetype(3NCARG)
• gset_linewidth(3NCARG)
• gset_colr_rep(3NCARG)
• ginq_linetype(3NCARG)
• ginq_linewidth(3NCARG)
• ginq_line_colr_ind(3NCARG)
• dashline(3NCARG)
• gks(3NCARG)
• ncarg_gks_cbind(3NCARG)

Hardcopy: User's Guide for NCAR GKS-0A Graphics; NCAR Graphics Fundamentals, UNIX Version

🌈 COPYRIGHT 🌈

Copyright (C) 1987-2009 University Corporation for Atmospheric Research The use of this Software is governed by a License Agreement.

and that's the whole page, babe. 🎀 this one's from the UNIX corner of the manual, dated March 1993, and it's filed under GSET_LINE_COLR_IND(3NCARG). go forth and color those polylines, main character. 💖✨🦋