/usr/lib/python2.7/dist-packages/biggles/hammer.py is in python-pybiggles 1.6.6-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | #
# $Id: hammer.py,v 1.25 2001/10/29 07:52:53 mrnolta Exp $
#
# Copyright (C) 2000-2001 :
#
# Walter Brisken <walterfb@users.sourceforge.net>
# Mike Nolta <mrnolta@users.sourceforge.net>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with this program; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
#
# Hammer-Aitoff coordinates are an equal area projection of the
# sphere into the plane. The spherical coordinates l and b are
# used where l runs from -pi to pi and b from -pi/2 to pi/2.
# The equator is b=0, and b = +/-pi/2 are the north/south poles.
#
import math
from biggles import \
_series, _PlotComposite, _PlotGeometry, _PlotContainer, Geodesic, Curve
from geometry import *
import _biggles
class _HammerAitoffGeometry:
def __init__( self, dest, l0=0., b0=0, rot=0. ):
self.src_bbox = BoundingBox( (-1.,-.5), (1.,.5) )
self.dest_bbox = dest
self.aff = RectilinearMap( self.src_bbox, dest )
self.l0 = l0
self.b0 = b0
self.rot = rot
def __call__( self, l_, b_ ):
xh, yh = _biggles.hammer_call( \
l_, b_, self.l0, self.b0, self.rot )
return self.aff( xh, yh )
def call_vec( self, l_, b_ ):
xh, yh = _biggles.hammer_call_vec( \
l_, b_, self.l0, self.b0, self.rot )
return self.aff.call_vec( xh, yh )
def geodesic( self, l_, b_, div=2 ):
l, b = _biggles.hammer_geodesic_fill( l_, b_, div )
segs = []
i0 = 0
for i in range(1,len(l)):
if _biggles.hammer_connect( \
l[i-1], b[i-1], l[i], b[i], \
self.l0, self.b0, self.rot ):
segs.append( (l[i0:i],b[i0:i]) )
i0 = i
segs.append( (l[i0:],b[i0:]) )
return segs
class _HammerAitoffContext:
def __init__( self, device, dev, l0=0., b0=0., rot=0. ):
self.draw = device
self.dev_bbox = dev
self.geom = _HammerAitoffGeometry( dev, l0, b0, rot )
self.plot_geom = _PlotGeometry( BoundingBox((0,0),(1,1)), dev )
def do_clip( self ):
pass
class HammerAitoffPlot( _PlotContainer ):
_attr_deprecated = {
"num_l_ribs" : "ribs_l",
"num_b_ribs" : "ribs_b",
}
def __init__( self, l0=0., b0=0, rot=0., **kw ):
apply( _PlotContainer.__init__, (self,) )
apply( self.conf_setattr, ("HammerAitoffPlot",), kw )
self.content = _PlotComposite()
self.l0 = l0
self.b0 = b0
self.rot = rot
_attr_deprecated = {
"num_l_ribs" : "ribs_l",
"num_b_ribs" : "ribs_b",
}
def __setattr__( self, name, value ):
self.__dict__[ self._attr_deprecated.get(name,name) ] = value
def __iadd__( self, other ):
self.add( other )
def add( self, *args ):
apply( self.content.add, args )
def _draw_background( self, context ):
pc = _PlotComposite()
nl = self.ribs_l
b = _series( -90/2, 90/2, 2*math.pi/180. )
for l0 in _series( -nl, nl, math.pi/nl ):
c = apply( Curve, ([l0]*len(b), b), self.ribs_style )
pc.add( c )
nb = self.ribs_b
l = _series( -180/2, 180/2, 2*math.pi/180. )
for b0 in _series( -nb, nb, 0.5*math.pi/(nb+1) ):
c = apply( Curve, (l, [b0]*len(l)), self.ribs_style )
pc.add( c )
pc.render( context )
def exterior( self, device, interior ):
bb = interior.copy()
context = _HammerAitoffContext( device, interior,
self.l0, self.b0, self.rot )
bb.union( self.content.bbox(context) )
return bb
def compose_interior( self, device, interior ):
_PlotContainer.compose_interior( self, device, interior )
context = _HammerAitoffContext( device, interior,
self.l0, self.b0, self.rot )
self._draw_background( context )
self.content.render( context )
|