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153 lines
3.7 KiB
Lua
153 lines
3.7 KiB
Lua
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--[[ $Id: x02.lua 9414 2009-01-29 22:48:54Z airwin $
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Multiple window and color map 0 demo.
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Copyright (C) 2008 Werner Smekal
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This file is part of PLplot.
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PLplot is free software you can redistribute it and/or modify
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it under the terms of the GNU General Library Public License as published
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by the Free Software Foundation either version 2 of the License, or
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(at your option) any later version.
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PLplot is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with PLplot if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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--]]
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-- initialise Lua bindings for PLplot examples.
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dofile("plplot_examples.lua")
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----------------------------------------------------------------------------
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-- draw_windows
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--
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-- Draws a set of numbered boxes with colors according to cmap0 entry.
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----------------------------------------------------------------------------
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function draw_windows(nw, cmap0_offset)
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pl.schr(0, 3.5)
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pl.font(4)
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for i = 0, nw-1 do
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pl.col0(i+cmap0_offset)
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pl.adv(0)
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vmin = 0.1
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vmax = 0.9
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for j = 0, 2 do
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pl.wid(j + 1)
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pl.vpor(vmin, vmax, vmin, vmax)
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pl.wind(0, 1, 0, 1)
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pl.box("bc", 0, 0, "bc", 0, 0)
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vmin = vmin + 0.1
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vmax = vmax - 0.1
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end
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pl.wid(1)
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pl.ptex(0.5, 0.5, 1, 0, 0.5, tostring(i))
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end
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end
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----------------------------------------------------------------------------
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-- demo1
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--
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-- Demonstrates multipl.e windows and default color map 0 palette.
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----------------------------------------------------------------------------
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function demo1()
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pl.bop()
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-- Divide screen into 16 regions
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pl.ssub(4, 4)
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draw_windows(16, 0)
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pl.eop()
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end
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----------------------------------------------------------------------------
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-- demo2
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--
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-- Demonstrates multipl.e windows, user-modified color map 0 palette, and
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-- HLS -> RGB translation.
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----------------------------------------------------------------------------
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function demo2()
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-- Set up cmap0
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-- Use 100 custom colors in addition to base 16
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r = {}
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g = {}
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b = {}
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-- Min & max lightness values
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lmin = 0.15
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lmax = 0.85
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pl.bop()
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-- Divide screen into 100 regions
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pl.ssub(10, 10)
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for i = 0, 99 do
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-- Bounds on HLS, from pl.hlsrgb() commentary --
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-- hue [0., 360.] degrees
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-- lightness [0., 1.] magnitude
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-- saturation [0., 1.] magnitude
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-- Vary hue uniformly from left to right
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h = (360/10) * math.mod(i, 10)
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-- Vary lightness uniformly from top to bottom, between min & max
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l = lmin + (lmax - lmin) * math.floor(i/10)/9
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-- Use max saturation
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s = 1
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r1, g1, b1 = pl.hlsrgb(h, l, s)
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-- Use 255.001 to avoid close truncation decisions in this example.
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r[i+1+16] = r1 * 255.001
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g[i+1+16] = g1 * 255.001
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b[i+1+16] = b1 * 255.001
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end
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-- Load default cmap0 colors into our custom set
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for i = 0, 15 do
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r[i+1], g[i+1], b[i+1] = pl.gcol0(i)
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end
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-- Now set cmap0 all at once (faster, since fewer driver calls)
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pl.scmap0(r, g, b)
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draw_windows(100, 16)
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pl.eop()
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end
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----------------------------------------------------------------------------
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-- main
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--
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-- Demonstrates multipl.e windows and color map 0 palette, both default and
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-- user-modified.
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----------------------------------------------------------------------------
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-- Parse and process command line arguments
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pl.parseopts(arg, pl.PL_PARSE_FULL)
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-- Initialize pl.pl.ot
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pl.init()
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-- Run demos
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demo1()
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demo2()
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pl.plend()
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