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# -*- coding: utf-8; -*-
# Copyright (C) 2001-2016 Alan W. Irwin
# 3-d line and point plot demo.
#
# 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
#
from numpy import *
opt = [1, 0, 1, 0]
alt = [20.0, 35.0, 50.0, 65.0]
az = [30.0, 40.0, 50.0, 60.0]
# main
#
# Does a series of 3-d plots for a given data set, with different
# viewing options in each plot.
NPTS = 1000
def main(w):
for k in range(4):
test_poly(w, k)
# From the mind of a sick and twisted physicist...
z = -1. + (2./NPTS) * arange(NPTS)
x = z*cos((2.*pi*6./NPTS)*arange(NPTS))
y = z*sin((2.*pi*6./NPTS)*arange(NPTS))
for k in range(4):
w.pladv(0)
w.plvpor(0.0, 1.0, 0.0, 0.9)
w.plwind(-1.0, 1.0, -0.9, 1.1)
w.plcol0(1)
w.plw3d(1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0,
alt[k], az[k])
w.plbox3("bnstu", "x axis", 0.0, 0,
"bnstu", "y axis", 0.0, 0,
"bcdmnstuv", "z axis", 0.0, 0)
w.plcol0(2)
if opt[k]:
w.plline3(x, y, z)
else:
# U+22C5 DOT OPERATOR.
w.plstring3(x, y, z, "⋅")
w.plcol0(3)
title = "#frPLplot Example 18 - Alt=%.0f, Az=%.0f" % (alt[k], az[k])
w.plmtex("t", 1.0, 0.5, 0.5, title)
# Restore defaults
# Must be done independently because otherwise this changes output files
# and destroys agreement with C examples.
#w.plcol0(1)
def THETA(a):
return 2. * pi * (a) / 20.
def PHI(a):
return pi * (a) / 20.1
def test_poly(w, k):
draw = [ [ 1, 1, 1, 1 ],
[ 1, 0, 1, 0 ],
[ 0, 1, 0, 1 ],
[ 1, 1, 0, 0 ] ]
w.pladv(0)
w.plvpor(0.0, 1.0, 0.0, 0.9)
w.plwind(-1.0, 1.0, -0.9, 1.1)
w.plcol0(1)
w.plw3d(1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, alt[k], az[k])
w.plbox3("bnstu", "x axis", 0.0, 0,
"bnstu", "y axis", 0.0, 0,
"bcdmnstuv", "z axis", 0.0, 0)
w.plcol0(2)
# x = r sin(phi) cos(theta)
# y = r sin(phi) sin(theta)
# z = r cos(phi)
# r = 1 :=)
cosi0 = cos(THETA(arange(20)))
cosi1 = cos(THETA(arange(1,21)))
sini0 = sin(THETA(arange(20)))
sini1 = sin(THETA(arange(1,21)))
cosi0.shape = (-1,1)
cosi1.shape = (-1,1)
sini0.shape = (-1,1)
sini1.shape = (-1,1)
cosj0 = cos(PHI(arange(20)))
cosj1 = cos(PHI(arange(1,21)))
sinj0 = sin(PHI(arange(20)))
sinj1 = sin(PHI(arange(1,21)))
x0 = cosi0*sinj0
y0 = sini0*sinj0
z0 = cosj0
x1 = cosi0*sinj1
y1 = sini0*sinj1
z1 = cosj1
x2 = cosi1*sinj1
y2 = sini1*sinj1
z2 = cosj1
x3 = cosi1*sinj0
y3 = sini1*sinj0
z3 = cosj0
x4 = x0
y4 = y0
z4 = z0
for i in range(20):
for j in range(20):
x = [x0[i,j],x1[i,j],x2[i,j],x3[i,j],x4[i,j]]
y = [y0[i,j],y1[i,j],y2[i,j],y3[i,j],y4[i,j]]
z = [z0[j],z1[j],z2[j],z3[j],z4[j]]
# Since negative dimensions don't make sense here
# to specify that points are to be drawn in
# counter-clockwise direction (as in x18c.c and
# x18.tcl) this must be specified with an optional
# extra argument in python API.
w.plpoly3(x, y, z, draw[k], 1)
w.plcol0(3)
w.plmtex("t", 1.0, 0.5, 0.5, "unit radius sphere" )
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