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146 lines
3.7 KiB
Lua
146 lines
3.7 KiB
Lua
--[[ $Id: x18.lua 9526 2009-02-13 22:06:13Z smekal $
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3-d line and point plot demo. Adapted from x08c.c.
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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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function test_poly(k)
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draw= { { 1, 1, 1, 1 },
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{ 1, 0, 1, 0 },
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{ 0, 1, 0, 1 },
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{ 1, 1, 0, 0 } }
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x = {}
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y = {}
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z = {}
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pl.adv(0)
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pl.vpor(0, 1, 0, 0.9)
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pl.wind(-1, 1, -0.9, 1.1)
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pl.col0(1)
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pl.w3d(1, 1, 1, -1, 1, -1, 1, -1, 1, alt[k], az[k])
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pl.box3("bnstu", "x axis", 0, 0,
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"bnstu", "y axis", 0, 0,
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"bcdmnstuv", "z axis", 0, 0)
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pl.col0(2)
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-- x = r sin(phi) cos(theta)
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-- y = r sin(phi) sin(theta)
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-- z = r cos(phi)
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-- r = 1 :=)
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for i=0, 19 do
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for j=0, 19 do
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x[1] = math.sin( math.pi*j/20.1 ) * math.cos( 2*math.pi*i/20 )
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y[1] = math.sin( math.pi*j/20.1 ) * math.sin( 2*math.pi*i/20 )
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z[1] = math.cos( math.pi*j/20.1 )
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x[2] = math.sin( math.pi*(j+1)/20.1 ) * math.cos( 2*math.pi*i/20 )
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y[2] = math.sin( math.pi*(j+1)/20.1 ) * math.sin( 2*math.pi*i/20 )
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z[2] = math.cos( math.pi*(j+1)/20.1 )
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x[3] = math.sin( math.pi*(j+1)/20.1 ) * math.cos( 2*math.pi*(i+1)/20 )
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y[3] = math.sin( math.pi*(j+1)/20.1 ) * math.sin( 2*math.pi*(i+1)/20 )
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z[3] = math.cos( math.pi*(j+1)/20.1 )
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x[4] = math.sin( math.pi*j/20.1 ) * math.cos( 2*math.pi*(i+1)/20 )
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y[4] = math.sin( math.pi*j/20.1 ) * math.sin( 2*math.pi*(i+1)/20 )
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z[4] = math.cos( math.pi*j/20.1 )
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x[5] = math.sin( math.pi*j/20.1 ) * math.cos( 2*math.pi*i/20 )
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y[5] = math.sin( math.pi*j/20.1 ) * math.sin( 2*math.pi*i/20 )
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z[5] = math.cos( math.pi*j/20.1 )
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pl.poly3( x, y, z, draw[k], 1 )
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end
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end
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pl.col0(3)
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pl.mtex("t", 1, 0.5, 0.5, "unit radius sphere" )
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end
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----------------------------------------------------------------------------
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-- main
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--
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-- Does a series of 3-d plots for a given data set, with different
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-- viewing options in each plot.
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----------------------------------------------------------------------------
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NPTS = 1000
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opt = { 1, 0, 1, 0 }
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alt = { 20, 35, 50, 65 }
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az = { 30, 40, 50, 60 }
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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 plplot
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pl.init()
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for k=1, 4 do
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test_poly(k)
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end
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x = {}
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y = {}
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z = {}
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-- From the mind of a sick and twisted physicist...
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for i=1, NPTS do
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z[i] = -1 + 2*(i-1)/NPTS
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-- Pick one ...
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-- r = 1 - (i-1) / NPTS
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r = z[i]
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x[i] = r * math.cos( 12*math.pi*(i-1)/NPTS )
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y[i] = r * math.sin( 12*math.pi*(i-1)/NPTS )
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end
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for k=1, 4 do
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pl.adv(0)
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pl.vpor(0, 1, 0, 0.9)
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pl.wind(-1, 1, -0.9, 1.1)
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pl.col0(1)
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pl.w3d(1, 1, 1, -1, 1, -1, 1, -1, 1, alt[k], az[k])
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pl.box3("bnstu", "x axis", 0, 0,
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"bnstu", "y axis", 0, 0,
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"bcdmnstuv", "z axis", 0, 0)
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pl.col0(2)
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if opt[k]~=0 then
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pl.line3( x, y, z )
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else
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pl.poin3( x, y, z, 1 )
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end
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pl.col0(3)
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pl.mtex("t", 1.0, 0.5, 0.5, "#frPLplot Example 18 - Alt=" .. alt[k] .. ", Az=" .. az[k])
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end
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pl.plend()
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