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--[[
3-d line and point plot demo. Adapted from x08c.c.
Copyright (C) 2008 Werner Smekal
This file is part of PLplot.
PLplot is free software you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published
by the Free Software Foundation either version 2 of the License, or
(at your option) any later version.
PLplot 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with PLplot if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
--]]
-- initialise Lua bindings for PLplot examples.
dofile("plplot_examples.lua")
function test_poly(k)
draw= { { 1, 1, 1, 1 },
{ 1, 0, 1, 0 },
{ 0, 1, 0, 1 },
{ 1, 1, 0, 0 } }
x = {}
y = {}
z = {}
pl.adv(0)
pl.vpor(0, 1, 0, 0.9)
pl.wind(-1, 1, -0.9, 1.1)
pl.col0(1)
pl.w3d(1, 1, 1, -1, 1, -1, 1, -1, 1, alt[k], az[k])
pl.box3("bnstu", "x axis", 0, 0,
"bnstu", "y axis", 0, 0,
"bcdmnstuv", "z axis", 0, 0)
pl.col0(2)
-- x = r sin(phi) cos(theta)
-- y = r sin(phi) sin(theta)
-- z = r cos(phi)
-- r = 1 :=)
for i=0, 19 do
for j=0, 19 do
x[1] = math.sin( math.pi*j/20.1 ) * math.cos( 2*math.pi*i/20 )
y[1] = math.sin( math.pi*j/20.1 ) * math.sin( 2*math.pi*i/20 )
z[1] = math.cos( math.pi*j/20.1 )
x[2] = math.sin( math.pi*(j+1)/20.1 ) * math.cos( 2*math.pi*i/20 )
y[2] = math.sin( math.pi*(j+1)/20.1 ) * math.sin( 2*math.pi*i/20 )
z[2] = math.cos( math.pi*(j+1)/20.1 )
x[3] = math.sin( math.pi*(j+1)/20.1 ) * math.cos( 2*math.pi*(i+1)/20 )
y[3] = math.sin( math.pi*(j+1)/20.1 ) * math.sin( 2*math.pi*(i+1)/20 )
z[3] = math.cos( math.pi*(j+1)/20.1 )
x[4] = math.sin( math.pi*j/20.1 ) * math.cos( 2*math.pi*(i+1)/20 )
y[4] = math.sin( math.pi*j/20.1 ) * math.sin( 2*math.pi*(i+1)/20 )
z[4] = math.cos( math.pi*j/20.1 )
x[5] = math.sin( math.pi*j/20.1 ) * math.cos( 2*math.pi*i/20 )
y[5] = math.sin( math.pi*j/20.1 ) * math.sin( 2*math.pi*i/20 )
z[5] = math.cos( math.pi*j/20.1 )
pl.poly3( x, y, z, draw[k], 1 )
end
end
pl.col0(3)
pl.mtex("t", 1, 0.5, 0.5, "unit radius sphere" )
end
----------------------------------------------------------------------------
-- main
--
-- Does a series of 3-d plots for a given data set, with different
-- viewing options in each plot.
----------------------------------------------------------------------------
NPTS = 1000
opt = { 1, 0, 1, 0 }
alt = { 20, 35, 50, 65 }
az = { 30, 40, 50, 60 }
-- Parse and process command line arguments
pl.parseopts(arg, pl.PL_PARSE_FULL)
-- Initialize plplot
pl.init()
for k=1, 4 do
test_poly(k)
end
x = {}
y = {}
z = {}
-- From the mind of a sick and twisted physicist...
for i=1, NPTS do
z[i] = -1 + 2*(i-1)/NPTS
-- Pick one ...
-- r = 1 - (i-1) / NPTS
r = z[i]
x[i] = r * math.cos( 12*math.pi*(i-1)/NPTS )
y[i] = r * math.sin( 12*math.pi*(i-1)/NPTS )
end
for k=1, 4 do
pl.adv(0)
pl.vpor(0, 1, 0, 0.9)
pl.wind(-1, 1, -0.9, 1.1)
pl.col0(1)
pl.w3d(1, 1, 1, -1, 1, -1, 1, -1, 1, alt[k], az[k])
pl.box3("bnstu", "x axis", 0, 0,
"bnstu", "y axis", 0, 0,
"bcdmnstuv", "z axis", 0, 0)
pl.col0(2)
if opt[k]~=0 then
pl.line3( x, y, z )
else
-- U+22C5 DOT OPERATOR.
pl.string3( x, y, z, "⋅" )
end
pl.col0(3)
pl.mtex("t", 1.0, 0.5, 0.5, "#frPLplot Example 18 - Alt=" .. alt[k] .. ", Az=" .. az[k])
end
pl.plend()
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