Mercurial > fife-parpg

annotate engine/python/fife/extensions/serializers/xml_loader_tools.py @ 668:e8a799239384

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* This fixes the case were the engine would clear the screen twice The editor and demos now suffer from a problem where if a map is not loaded the screen doesnt get cleared and you see traces of the UI from previous frames. For now the editor, RPG demo and Shooter force the engine to clear the screen every frame. This is not ideal as once a map is loaded they will be clearing the screen twice per frame.
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Mon, 08 Nov 2010 20:37:31 +0000
parents e3140f01749d
children
rev   line source
661
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1 # -*- coding: utf-8 -*-
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2 # ####################################################################
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3 # Copyright (C) 2005-2010 by the FIFE team
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4 # http://www.fifengine.de
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5 # This file is part of FIFE.
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6 #
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7 # FIFE is free software; you can redistribute it and/or
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8 # modify it under the terms of the GNU Lesser General Public
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9 # License as published by the Free Software Foundation; either
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10 # version 2.1 of the License, or (at your option) any later version.
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11 #
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12 # This library is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 # Lesser General Public License for more details.
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16 #
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17 # You should have received a copy of the GNU Lesser General Public
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18 # License along with this library; if not, write to the
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19 # Free Software Foundation, Inc.,
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20 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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21 # ####################################################################
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22
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23 """ utilities for xml maploading process """
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24
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25 import sys, os
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26
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27 from fife import fife
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28 import math
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29
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30 def loadImportFile(loader, path, engine, debug=False):
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31 """ uses XMLObjectLoader to load import files from path
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32
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33 @type path: string
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34 @param path: path to import file
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35 @type debug: bool
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36 @param debug: flag to activate / deactivate print statements
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37 """
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38 loader.loadResource(fife.ResourceLocation(path))
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39 if debug: print 'imported object file ' + path
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40
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41 def loadImportDir(loader, path, engine, debug=False):
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42 """ helper function to call loadImportFile on a directory
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43
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44 @type path: string
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45 @param path: path to import directory
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46 @type debug: bool
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47 @param debug: flag to activate / deactivate print statements
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48 """
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49 for _file in filter(lambda f: f.split('.')[-1] == 'xml', engine.getVFS().listFiles(path)):
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50 loadImportFile(loader, '/'.join([path, _file]), engine, debug)
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51
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52 def loadImportDirRec(loader, path, engine, debug=False):
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53 """ helper function to call loadImportFile recursive on a directory
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54
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55 @type path: string
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56 @param path: path to import directory
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57 @type debug: bool
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58 @param debug: flag to activate / deactivate print statements
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59 """
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60 loadImportDir(loader, path, engine, debug)
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61
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62 for _dir in filter(lambda d: not d.startswith('.'), engine.getVFS().listDirectories(path)):
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63 loadImportDirRec(loader, '/'.join([path, _dir]), engine, debug)
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64
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65 def root_subfile(masterfile, subfile):
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66 """
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67 Returns new path for given subfile (path), which is rooted against masterfile
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68 E.g. if masterfile is ./../foo/bar.xml and subfile is ./../foo2/subfoo.xml,
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69 returned path is ../foo2/subfoo.xml
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70 NOTE: masterfile is expected to be *file*, not directory. subfile can be either
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71 """
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72 s = '/'
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73
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74 masterfile = norm_path(os.path.abspath(masterfile))
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75 subfile = norm_path(os.path.abspath(subfile))
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76
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77 master_fragments = masterfile.split(s)
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78 sub_fragments = subfile.split(s)
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79
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80 master_leftovers = []
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81 sub_leftovers = []
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82
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83 for i in xrange(len(master_fragments)):
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84 try:
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85 if master_fragments[i] == sub_fragments[i]:
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86 master_leftovers = master_fragments[i+1:]
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87 sub_leftovers = sub_fragments[i+1:]
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88 except IndexError:
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89 break
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90
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91 pathstr = ''
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92 for f in master_leftovers[:-1]:
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93 pathstr += '..' + s
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94 pathstr += s.join(sub_leftovers)
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95 return pathstr
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96
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97 def reverse_root_subfile(masterfile, subfile):
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98 """
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99 does inverse operation to root_subfile. E.g.
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100 E.g. if masterfile is ./../foo/bar.xml and subfile is ../foo2/subfoo.xml,
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101 returned path ./../foo2/subfoo.xml
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102 Usually this function is used to convert saved paths into engine relative paths
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103 NOTE: masterfile is expected to be *file*, not directory. subfile can be either
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104 """
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105 s = '/'
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106
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107 masterfile = norm_path(os.path.abspath(masterfile)).split(s)[:-1]
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108 subfile = norm_path(os.path.abspath( s.join(masterfile) + s + subfile ))
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109 masterfile = norm_path(os.getcwd()) + s + 'foo.bar' # cheat a little to satisfy root_subfile
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110 return root_subfile(masterfile, subfile)
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111
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112 def norm_path(path):
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113 """
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114 Makes the path use '/' delimited separators. FIFE always uses these delimiters, but some os-related
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115 routines will default to os.path.sep.
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116 """
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117 if os.path.sep == '/':
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118 return path
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119
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120 return '/'.join(path.split(os.path.sep))
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121
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122
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123 def frange(limit1, limit2 = None, increment = 1.):
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124 """ source:
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125 http://code.activestate.com/recipes/66472-frange-a-range-function-with-float-increments/
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126
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127 Range function that accepts floats (and integers).
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128
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129 Usage:
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130 frange(-2, 2, 0.1)
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131 frange(10)
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132 frange(10, increment = 0.5)
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133
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134 The returned value is an iterator. Use list(frange) for a list.
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135 """
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136
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137 if limit2 is None:
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138 limit2, limit1 = limit1, 0.
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139 else:
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140 limit1 = float(limit1)
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141
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142 count = int(math.ceil(limit2 - limit1)/increment)
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143 return (limit1 + n*increment for n in range(count))
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144