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#!/usr/bin/env python
#
# x18c.c
#
# 3-d line and point plot demo. Adapted from x08c.c.
import math
import pl
import sys
import os
module_dir = "@MODULE_DIR@"
if module_dir[0] == '@':
module_dir = os.getcwd ()
sys.path.insert (0, module_dir)
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():
# Parse and process command line arguments
# pl.ParseOpts(sys.argv, pl.PARSE_FULL)
# Initialize plplot
pl.init()
for k in range(4):
test_poly(k)
x = []
y = []
z = []
# From the mind of a sick and twisted physicist...
for i in range(NPTS):
z.append(-1. + 2. * i / NPTS)
# Pick one ...
## r = 1. - ( (float) i / (float) NPTS )
r = z[i]
x.append(r * math.cos( 2. * math.pi * 6. * i / NPTS ))
y.append(r * math.sin( 2. * math.pi * 6. * i / NPTS ))
for k in range(4):
pl.adv(0)
pl.vpor(0.0, 1.0, 0.0, 0.9)
pl.wind(-1.0, 1.0, -0.9, 1.1)
pl.col(1)
pl.w3d(1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0,
alt[k], az[k])
pl.box3("bnstu", "x axis", 0.0, 0,
"bnstu", "y axis", 0.0, 0,
"bcdmnstuv", "z axis", 0.0, 0)
pl.col(2)
if opt[k]:
pl.line3(x, y, z)
else:
pl.poin3(x, y, z, 1)
pl.col(3)
title = "#frPLplot Example 18 - Alt=%.0f, Az=%.0f" % (alt[k],
az[k])
pl.mtex("t", 1.0, 0.5, 0.5, title)
pl.end()
def test_poly(k):
draw = [ [ 1, 1, 1, 1 ],
[ 1, 0, 1, 0 ],
[ 0, 1, 0, 1 ],
[ 1, 1, 0, 0 ] ]
pl.adv(0)
pl.vpor(0.0, 1.0, 0.0, 0.9)
pl.wind(-1.0, 1.0, -0.9, 1.1)
pl.col(1)
pl.w3d(1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, alt[k], az[k])
pl.box3("bnstu", "x axis", 0.0, 0,
"bnstu", "y axis", 0.0, 0,
"bcdmnstuv", "z axis", 0.0, 0)
pl.col(2)
def THETA(a):
return 2. * math.pi * (a) / 20.
def PHI(a):
return math.pi * (a) / 20.1
## x = r sin(phi) cos(theta)
## y = r sin(phi) sin(theta)
## z = r cos(phi)
## r = 1 :=)
for i in range(20):
for j in range(20):
x = []
y = []
z = []
x.append(math.sin( PHI(j) ) * math.cos( THETA(i) ))
y.append(math.sin( PHI(j) ) * math.sin( THETA(i) ))
z.append(math.cos( PHI(j) ))
x.append(math.sin( PHI(j) ) * math.cos( THETA(i+1) ))
y.append(math.sin( PHI(j) ) * math.sin( THETA(i+1) ))
z.append(math.cos( PHI(j) ))
x.append(math.sin( PHI(j+1) ) * math.cos( THETA(i+1) ))
y.append(math.sin( PHI(j+1) ) * math.sin( THETA(i+1) ))
z.append(math.cos( PHI(j+1) ))
x.append(math.sin( PHI(j+1) ) * math.cos( THETA(i) ))
y.append(math.sin( PHI(j+1) ) * math.sin( THETA(i) ))
z.append(math.cos( PHI(j+1) ))
x.append(math.sin( PHI(j) ) * math.cos( THETA(i) ))
y.append(math.sin( PHI(j) ) * math.sin( THETA(i) ))
z.append(math.cos( PHI(j) ))
# N.B.: The Python poly3 no longer takes a
# (possibly negative) length argument, so if
# you want to pass a counterclockwise polygon
# you now have to reverse the list. The code
# above was rearranged to create a clockwise
# polygon instead of a counterclockwise
# polygon.
pl.poly3(x, y, z, draw[k])
pl.col(3)
pl.mtex("t", 1.0, 0.5, 0.5, "unit radius sphere" )
main()
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