annotate orpg/mapper/region.py @ 65:4840657c23c5 ornery-dev

Traipse Dev 'OpenRPG' {090817-02} Traipse is a distribution of OpenRPG that is designed to be easy to setup and go. Traipse also makes it easy for developers to work on code without fear of sacrifice. 'Ornery-Orc' continues the trend of 'Grumpy' and adds fixes to the code. 'Ornery-Orc''s main goal is to offer more advanced features and enhance the productivity of the user. Update Summary: Update to Settings Menu. When user changes font or font size the chat window will now update without needing a restart. Change to dirpath/dir_struct file. No longer creates OPENRPG_BASE environment key.
author sirebral
date Mon, 17 Aug 2009 06:56:31 -0500
parents 072ffc1d466f
children 449a8900f9ac
rev   line source
0
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1 # Copyright (C) 2000-2001 The OpenRPG Project
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2 #
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3 # openrpg-dev@lists.sourceforge.net
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4 #
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5 # This program is free software; you can redistribute it and/or modify
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6 # it under the terms of the GNU General Public License as published by
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7 # the Free Software Foundation; either version 2 of the License, or
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8 # (at your option) any later version.
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9 #
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10 # This program is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU General Public License for more details.
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14 #
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15 # You should have received a copy of the GNU General Public License
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16 # along with this program; if not, write to the Free Software
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17 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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18 # --
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19 #
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20 # File: mapper/region.py
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21 # Author: Mark Tarrabain
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22 # Maintainer:
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23 # Version:
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24 # $Id: region.py,v 1.10 2006/11/04 21:24:21 digitalxero Exp $
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25 #
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26 __version__ = "$Id: region.py,v 1.10 2006/11/04 21:24:21 digitalxero Exp $"
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27
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28 import sys
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29
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30 # This class manages the edge of a polygon
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31 # it is employed by scan_convert to trace each edge of the polygon as the
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32 # scan converter advances past each Y coordinate
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33 # A bresenham-type of algorithm is used to avoid expensive computation during
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34 # use - no floating point arithmetic is needed.
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35 class Edge:
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36 def __init__(self,start,end):
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37 self.startx=start.X
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38 self.starty=start.Y
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39 self.endx=end.X
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40 self.endy=end.Y
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41 self.dy=self.endy-self.starty
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42 self.cx=self.startx
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43 self.bottom=0
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44 self.dir = 0
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45 if self.endx>self.startx: self.dx = int((self.endx-self.startx)/self.dy)
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46 else: self.dx = -int((self.startx-self.endx)/self.dy)
0
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47 self.error = 0
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48 if self.endx >= self.startx: self.inc = (self.endx-self.startx)%self.dy
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49 else: self.inc = (self.startx-self.endx)%self.dy
0
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50
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51 def advance(self):
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52 self.cx += self.dx
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53 self.error += self.inc
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54 if (self.error>=self.dy):
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55 if (self.endx<self.startx): self.cx -= 1
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56 else: self.cx += 1
0
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57 self.error -= self.dy
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58
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59 # Utilitarian class for describing a coordinate in 2D space
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60 class IPoint:
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61 def __init__(self):
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62 X=0
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63 Y=0
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64
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65 def __str__(self):
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66 return "(X:" + str(self.X) + ", Y:" + str(self.Y) + ")"
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67
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68 def pluseq(self,b):
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69 self.X += b.X
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70 self.Y += b.Y
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71
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72 def minuseq(self,b):
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73 self.X -= b.X
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74 self.Y -= b.Y
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75
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76 def make(self,x,y):
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77 self.X=x
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78 self.Y=y
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79 return self
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80
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81 def equals(self,b):
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82 if self.X==b.X and self.Y==b.Y: return 1
0
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83 return 0
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84
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85 def less(self,b):
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86 if self.Y<b.Y or (self.Y==b.Y and self.X<b.X): return 1
0
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87 return 0
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88
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89 def greater(self,b):
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90 if self.Y>b.Y or (self.Y==b.Y and self.X>b.X): return 1
0
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91 return 0
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92
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93 # generic rectangle class
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94 class IRect:
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95 def __init__(self): #initializes to an invalid rectangle
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96 self.left=999999
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97 self.top=999999
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98 self.right=-999999
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99 self.bottom=-999999
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100
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101 def __str__(self):
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102 return "[ left:"+str(self.left)+", top:"+str(self.top)+", right:"+str(self.right)+", bottom:"+str(self.bottom)+" ]"
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103
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104 def ToPoly(self):
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105 thelist = []
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106 thelist.append(IPoint().make(self.left,self.top))
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107 thelist.append(IPoint().make(self.right,self.top))
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108 thelist.append(IPoint().make(self.right,self.bottom))
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109 thelist.append(IPoint().make(self.left,self.bottom))
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110 return thelist
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111
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112 def Width(self):
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113 return self.right-self.left+1
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114
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115 def Height(self):
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116 return self.bottom-self.top+1
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117
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118 def GetX(self):
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119 return self.left
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120
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121 def GetY(self):
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122 return self.top
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123
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124 def GetW(self):
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125 return self.right-self.left+1
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126
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127 def GetH(self):
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128 return self.bottom-self.top+1
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129
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130 def Size(self):
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131 return IPoint().make(self.right-self.left+1,self.bottom-self.top+1)
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132
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133 def TopLeft(self):
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134 return IPoint().make(self.left,self.top)
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135
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136 def BottomRight(self):
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137 return IPoint().make(self.right,self.bottom)
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138
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parents:
diff changeset
139 def Bounds(self):
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diff changeset
140 return IRect().make(0,0,self.right-self.left,self.bottom-self.top)
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141
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142 def Resize(self,nL,nT,nR,nB):
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parents:
diff changeset
143 self.left+=nL
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parents:
diff changeset
144 self.top+=nT
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parents:
diff changeset
145 self.right+=nR
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parents:
diff changeset
146 sel.bottom+=nB
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parents:
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147
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148 def IsValid(self):
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parents: 0
diff changeset
149 if (self.left<=self.right and self.top<=self.bottom): return 1
0
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diff changeset
150 return 0
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151
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152 def add(self,pt):
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153 return IRect().make(self.left+pt.X,self.top+pt.Y,self.right+pt.X,self.bottom+pt.Y)
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154
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155 def subtract(self,pt):
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156 return IRect().make(self.left+pt.X,self.top+pt.Y,self.right+pt.X,self.bottom+pt.Y)
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157
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parents:
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158 def intersect(self,rect):
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parents:
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159 return IRect().make(max(self.left,rect.left),max(self.top,rect.top),min(self.right,rect.right),min(self.bottom,rect.bottom))
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160
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parents:
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161 def union(self,rect):
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162 return IRect().make(min(self.left,rect.left),min(self.top,rect.top),max(self.right,rect.right),max(self.bottom,rect.bottom))
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163
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164 def equals(self,rect):
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072ffc1d466f 2nd attempt. Still untested.
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parents: 0
diff changeset
165 if (self.top==rect.top and self.bottom==rect.bottom and self.left==rect.left and self.right==rect.right): return 1
0
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166 return 0
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167
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168 def make(self,l,t,r,b):
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169 self.left=l
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parents:
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170 self.right=r
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171 self.top=t
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parents:
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172 self.bottom=b
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parents:
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173 return self
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174
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parents:
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175 # A span is a single, contiguous horizontal line. The routine scan_convert
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176 # returns a list of these that describe the polygon
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177 class ISpan:
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178 def __init__(self,x1,x2,ypos):
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179 self.left=x1
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180 self.right=x2
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parents:
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181 self.y=ypos
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182
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183 def __str__(self):
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parents:
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184 return "(" + str(self.left) + " to " + str(self.right) + " at " + str(self.y) + ")"
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185
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186 # clipping rectangle class -- this class is a single node in a linked list
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parents:
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187 # of rectangles that describe a region
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188
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189 class ClipRect:
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parents:
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190 def __init__(self):
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parents:
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191 self.next=None
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192 self.prev=None
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193 self.bounds=IRect().make(0,0,0,0)
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parents:
diff changeset
194
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195
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196 # cliprectlist -- the container class that manages a list of cliprects
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197 class ClipRectList:
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parents:
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198 def __init__(self):
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199 self.first=None
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parents:
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200 self.last=None
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parents:
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201 self.count=0
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202
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203 def __str__(self):
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204 x="["
20
072ffc1d466f 2nd attempt. Still untested.
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parents: 0
diff changeset
205 for y in self.GetList(): x+=" "+str(y.bounds)+" "
0
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parents:
diff changeset
206 x+="]"
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parents:
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207 return x
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parents:
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208
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209 #remove all rectangles from list
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parents:
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210 def Clear(self):
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parents:
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211 while(self.first):
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parents:
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212 rect=self.first
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parents:
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213 self.first=self.first.next
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parents:
diff changeset
214 del rect
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parents:
diff changeset
215 self.last=None
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parents:
diff changeset
216 self.count=0
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parents:
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217
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parents:
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218 #add a new clipping rectangle to list
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parents:
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219 def AddRect(self,rect):
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parents:
diff changeset
220 rect.prev=None
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parents:
diff changeset
221 rect.next=self.first
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
222 if not (self.first is None): self.first.prev=rect
0
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parents:
diff changeset
223 self.first=rect
20
072ffc1d466f 2nd attempt. Still untested.
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parents: 0
diff changeset
224 if self.last is None: self.last=rect
0
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parents:
diff changeset
225 self.count += 1
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parents:
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226
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parents:
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227 #removes the passed clipping rectangle from the list
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228 def RemoveRect(self,rect):
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
229 if not (rect.prev is None): rect.prev.next=rect.next
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
230 else: self.first=rect.next
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
231 if not (rect.next is None): rect.next.prev=rect.prev
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
232 else: self.last=rect.prev
0
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parents:
diff changeset
233 self.count -= 1
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parents:
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234
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parents:
diff changeset
235 # find the clipping rectangle at the the beginning of the list, remove it,
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parents:
diff changeset
236 # and return it
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parents:
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237 def RemoveHead(self):
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
238 if self.count==0: return None
0
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parents:
diff changeset
239 rect=self.first
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parents:
diff changeset
240 self.first=rect.next
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
241 if (self.first is None): self.last=None
0
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parents:
diff changeset
242 self.count -= 1
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parents:
diff changeset
243 return rect
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parents:
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244
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parents:
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245 # stealrects -- appends the list of clipping rectangles in pclist to the current
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parents:
diff changeset
246 # list. removes the entries from pclist
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parents:
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247 def StealRects(self,pclist):
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072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
248 if pclist.first is None: return
0
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sirebral
parents:
diff changeset
249 if self.first is None:
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sirebral
parents:
diff changeset
250 self.first=pclist.first
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parents:
diff changeset
251 self.last=pclist.last
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parents:
diff changeset
252 else:
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parents:
diff changeset
253 self.last.next=pclist.first
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parents:
diff changeset
254 pclist.first.prev=self.last
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sirebral
parents:
diff changeset
255 self.last=pclist.last
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sirebral
parents:
diff changeset
256 self.count += pclist.count
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parents:
diff changeset
257 pclist.first = None
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parents:
diff changeset
258 pclist.last = None
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parents:
diff changeset
259 pclist.count = 0
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parents:
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260
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parents:
diff changeset
261 # utilitarian procedure to return all clipping rectangles as a Python list
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parents:
diff changeset
262 def GetList(self):
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parents:
diff changeset
263 result=[]
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parents:
diff changeset
264 f = self.first
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parents:
diff changeset
265 while f:
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parents:
diff changeset
266 result.append(f)
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parents:
diff changeset
267 f = f.next
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parents:
diff changeset
268 return result
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parents:
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269
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parents:
diff changeset
270 # some utility procedures, defined outside the scope of any class to ensure
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parents:
diff changeset
271 # efficiency
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parents:
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272
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parents:
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273 def _hSortCmp(rect1,rect2):
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
274 if (rect1.bounds.left<rect2.bounds.left): return -1
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
275 if (rect1.bounds.left>rect2.bounds.left): return 1
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
276 if (rect1.bounds.top<rect2.bounds.top): return -1
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
277 if (rect1.bounds.top>rect2.bounds.top): return 1
0
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sirebral
parents:
diff changeset
278 return 0
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parents:
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279
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
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parents:
diff changeset
280 def _vSortCmp(rect1,rect2):
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
281 if (rect1.bounds.top<rect2.bounds.top): return -1
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
282 if (rect1.bounds.top>rect2.bounds.top): return 1
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
283 if (rect1.bounds.left<rect2.bounds.left): return -1
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
284 if (rect1.bounds.left>rect2.bounds.left): return 1
0
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sirebral
parents:
diff changeset
285 return 0
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sirebral
parents:
diff changeset
286
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parents:
diff changeset
287 # this is the class for which this whole source file is designed!
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parents:
diff changeset
288 # a Region is maintained as an optimal set of non-intersecting rectangles
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sirebral
parents:
diff changeset
289 # whose union is the 2D area of interest. At the end of each of the public
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parents:
diff changeset
290 # procedures that may alter the region's structure, the set of rectangles is
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parents:
diff changeset
291 # passed through an optimization phase, that joins any rectangles that are found
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sirebral
parents:
diff changeset
292 # to be adjacent and can be combined into a single, larger rectangle
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parents:
diff changeset
293
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sirebral
parents:
diff changeset
294 class IRegion:
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parents:
diff changeset
295 def __init__(self):
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parents:
diff changeset
296 self.crects=ClipRectList()
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parents:
diff changeset
297 self.firstclip=None
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sirebral
parents:
diff changeset
298
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sirebral
parents:
diff changeset
299 def __AllocClipRect(self):
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parents:
diff changeset
300 return ClipRect()
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parents:
diff changeset
301
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sirebral
parents:
diff changeset
302 def __FreeClipRect(self,p):
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sirebral
parents:
diff changeset
303 del p
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sirebral
parents:
diff changeset
304
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parents:
diff changeset
305 def Clear(self):
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parents:
diff changeset
306 self.crects.Clear()
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sirebral
parents:
diff changeset
307
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sirebral
parents:
diff changeset
308 def isEmpty(self):
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
309 if self.crects.first: return 0
0
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parents:
diff changeset
310 return 1
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parents:
diff changeset
311
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sirebral
parents:
diff changeset
312 def Copy(self,dest):
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sirebral
parents:
diff changeset
313 dest.Clear()
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sirebral
parents:
diff changeset
314 p=self.crects.first
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parents:
diff changeset
315 while p:
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sirebral
parents:
diff changeset
316 dest.__AddRect(p.bounds)
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sirebral
parents:
diff changeset
317 p=p.next
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sirebral
parents:
diff changeset
318
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sirebral
parents:
diff changeset
319 def __AddRect(self,rect):
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sirebral
parents:
diff changeset
320 cr=self.__AllocClipRect()
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sirebral
parents:
diff changeset
321 cr.bounds=IRect().make(rect.left,rect.top,rect.right,rect.bottom)
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sirebral
parents:
diff changeset
322 self.crects.AddRect(cr)
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sirebral
parents:
diff changeset
323 return cr
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sirebral
parents:
diff changeset
324
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sirebral
parents:
diff changeset
325 # This is the magic procedure that always makes it possible to merge adjacent
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sirebral
parents:
diff changeset
326 # rectangles later. It is called once for each rectangle to be combined
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sirebral
parents:
diff changeset
327 # with the current region. Basically, it dices the current region into
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sirebral
parents:
diff changeset
328 # horizontal bands where any rectangle is found to be beside the one being
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sirebral
parents:
diff changeset
329 # examined. This tends to leave more rectangles than necessary in the region,
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sirebral
parents:
diff changeset
330 # but they can be culled during the optimization phase when they are combined
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sirebral
parents:
diff changeset
331 # with adjacent rectangles.
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sirebral
parents:
diff changeset
332
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sirebral
parents:
diff changeset
333 def __Examine(self,rect):
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sirebral
parents:
diff changeset
334 newlist = ClipRectList()
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sirebral
parents:
diff changeset
335 while not (self.crects.first is None):
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sirebral
parents:
diff changeset
336 p = self.crects.RemoveHead()
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sirebral
parents:
diff changeset
337 if (p.bounds.right+1==rect.left or p.bounds.left==rect.right+1):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
338 if (p.bounds.top<rect.top and p.bounds.bottom>rect.bottom):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
339 cnew=[IRect().make(p.bounds.left,p.bounds.top,p.bounds.right,rect.top-1),
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
340 IRect().make(p.bounds.left,rect.top,p.bounds.right,rect.bottom),
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
341 IRect().make(p.bounds.left,rect.bottom+1,p.bounds.right,p.bounds.bottom)]
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sirebral
parents:
diff changeset
342 elif (p.bounds.top<rect.top and p.bounds.bottom>rect.top):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
343 cnew=[IRect().make(p.bounds.left,p.bounds.top,p.bounds.right,rect.top-1),
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
344 IRect().make(p.bounds.left,rect.top,p.bounds.right,p.bounds.bottom)]
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sirebral
parents:
diff changeset
345 elif (p.bounds.top<rect.bottom and p.bounds.bottom>rect.bottom):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
346 cnew=[IRect().make(p.bounds.left,p.bounds.top,p.bounds.right,rect.bottom),
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
347 IRect().make(p.bounds.left,rect.bottom+1,p.bounds.right,p.bounds.bottom)]
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sirebral
parents:
diff changeset
348 else:
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sirebral
parents:
diff changeset
349 cnew=[IRect().make(p.bounds.left,p.bounds.top,p.bounds.right,p.bounds.bottom)]
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sirebral
parents:
diff changeset
350 self.__FreeClipRect(p)
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sirebral
parents:
diff changeset
351 for i in cnew:
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sirebral
parents:
diff changeset
352 if (i.IsValid()):
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sirebral
parents:
diff changeset
353 newclip=self.__AllocClipRect()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
354 newclip.bounds=i
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
355 newlist.AddRect(newclip)
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
356 else: newlist.AddRect(p)
0
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
357 self.crects.StealRects(newlist)
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sirebral
parents:
diff changeset
358
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
359 def __IncludeRect(self,rect):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
360 tmprg=IRegion()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
361 tmprg.__AddRect(rect)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
362 p = self.crects.first
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
363 while p:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
364 tmprg.__ExcludeRect(p.bounds)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
365 p = p.next
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
366 self.crects.StealRects(tmprg.crects)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
367
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
368 def IncludeRect(self,rect):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
369 tmprg = IRegion()
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sirebral
parents:
diff changeset
370 tmprg.Clear()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
371 tmprg.__AddRect(rect)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
372 self.__Examine(rect)
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sirebral
parents:
diff changeset
373 p= self.crects.first
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sirebral
parents:
diff changeset
374 while p:
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sirebral
parents:
diff changeset
375 tmprg.__Examine(p.bounds)
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sirebral
parents:
diff changeset
376 p=p.next
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sirebral
parents:
diff changeset
377 p=tmprg.crects.first
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sirebral
parents:
diff changeset
378 while p:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
379 self.__IncludeRect(p.bounds)
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sirebral
parents:
diff changeset
380 p=p.next
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sirebral
parents:
diff changeset
381 self.Optimize()
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sirebral
parents:
diff changeset
382
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
383 def IncludeRegion(self,regn):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
384 tmprg = IRegion()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
385 regn.Copy(tmprg)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
386 p = self.crects.first
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
387 while p:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
388 tmprg.__Examine(p.bounds)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
389 p=p.next
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
390 p = tmprg.crects.first
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
391 while p:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
392 self.__Examine(p.bounds)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
393 self.__IncludeRect(p.bounds)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
394 p = p.next
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
395 self.Optimize()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
396
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
397 def __ExcludeRect(self,rect):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
398 newlist=ClipRectList()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
399 while not (self.crects.first is None):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
400 pcclip=self.crects.RemoveHead()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
401 hide=rect.intersect(pcclip.bounds)
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
402 if not hide.IsValid(): newlist.AddRect(pcclip)
0
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
403 else:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
404 #make 4 new rectangles to replace the one taken out
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
405 #
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
406 # AAAAAAAAAAAA
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
407 # AAAAAAAAAAAA
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
408 # BBBB CCCC
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
409 # BBBB CCCC
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
410 # DDDDDDDDDDDD
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
411 # DDDDDDDDDDDD
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sirebral
parents:
diff changeset
412 # the center rectangle is the one to remove, rectangles A,B,C and D
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
413 # get created. If the rectangle is not in the middle, then the
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
414 # corresponding rectangle that should have been on "that side" of
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
415 # the current rectangle will have IsValid==False, so it will be
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
416 # rejected.
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
417 cnew=[IRect().make(pcclip.bounds.left,hide.top,hide.left-1,hide.bottom),
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
418 IRect().make(hide.right+1,hide.top,pcclip.bounds.right,hide.bottom),
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
419 IRect().make(pcclip.bounds.left,hide.bottom+1,pcclip.bounds.right,pcclip.bounds.bottom),
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
420 IRect().make(pcclip.bounds.left,pcclip.bounds.top,pcclip.bounds.right,hide.top-1) ]
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sirebral
parents:
diff changeset
421 self.__FreeClipRect(pcclip)
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sirebral
parents:
diff changeset
422 for i in cnew:
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sirebral
parents:
diff changeset
423 if (i.IsValid()):
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sirebral
parents:
diff changeset
424 newclip=self.__AllocClipRect()
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sirebral
parents:
diff changeset
425 newclip.bounds=i
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sirebral
parents:
diff changeset
426 newlist.AddRect(newclip)
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sirebral
parents:
diff changeset
427 self.crects.last=None
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sirebral
parents:
diff changeset
428 self.crects.StealRects(newlist)
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sirebral
parents:
diff changeset
429 self.Optimize()
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sirebral
parents:
diff changeset
430
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sirebral
parents:
diff changeset
431 def ExcludeRect(self,rect):
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sirebral
parents:
diff changeset
432 self.__ExcludeRect(rect)
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sirebral
parents:
diff changeset
433 self.Optimize()
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sirebral
parents:
diff changeset
434
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sirebral
parents:
diff changeset
435 def ExcludeRegion(self,reg):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
436 pclist = reg.crects.first
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sirebral
parents:
diff changeset
437 while pclist:
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sirebral
parents:
diff changeset
438 self.__ExcludeRect(pclist.bounds)
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sirebral
parents:
diff changeset
439 pclist = pclist.next
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sirebral
parents:
diff changeset
440 self.Optimize()
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sirebral
parents:
diff changeset
441
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sirebral
parents:
diff changeset
442 def __IntersectRect(self,rect):
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sirebral
parents:
diff changeset
443 newlist=ClipRectList()
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sirebral
parents:
diff changeset
444 while not self.crects.first is None:
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sirebral
parents:
diff changeset
445 pcclip=self.crects.RemoveHead()
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sirebral
parents:
diff changeset
446 hide=rect.intersect(pcclip.bounds)
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
447 if not hide.IsValid(): newlist.AddRect(pcclip)
0
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sirebral
parents:
diff changeset
448 else:
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sirebral
parents:
diff changeset
449 cnew=[IRect().make(pcclip.bounds.left,hide.top,hide.left-1,hide.bottom),
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sirebral
parents:
diff changeset
450 IRect().make(hide.right+1,hide.top,pcclip.bounds.right,hide.bottom),
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sirebral
parents:
diff changeset
451 IRect().make(pcclip.bounds.left,hide.bottom+1,pcclip.bounds.right,pcclip.bounds.bottom),
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sirebral
parents:
diff changeset
452 IRect().make(pcclip.bounds.left,pcclip.bounds.top,pcclip.bounds.right,hide.top-1) ]
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sirebral
parents:
diff changeset
453 self.__FreeClipRect(pcclip)
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sirebral
parents:
diff changeset
454 for i in cnew:
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sirebral
parents:
diff changeset
455 if (i.IsValid()):
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sirebral
parents:
diff changeset
456 newclip=self.__AllocClipRect()
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sirebral
parents:
diff changeset
457 newclip.bounds=i
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sirebral
parents:
diff changeset
458 newlist.AddRect(newclip)
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sirebral
parents:
diff changeset
459 self.crects.last = None
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sirebral
parents:
diff changeset
460 self.crects.StealRects(newlist)
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sirebral
parents:
diff changeset
461
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sirebral
parents:
diff changeset
462 def IntersectRect(self,rect):
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sirebral
parents:
diff changeset
463 self.__IntersectRect(rect)
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sirebral
parents:
diff changeset
464 self.Optimize()
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sirebral
parents:
diff changeset
465
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sirebral
parents:
diff changeset
466 def IntersectRegion(self,reg):
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sirebral
parents:
diff changeset
467 clist=ClipRectList()
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sirebral
parents:
diff changeset
468 pcvclip = reg.crects.first
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sirebral
parents:
diff changeset
469 while pcvclip:
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sirebral
parents:
diff changeset
470 pchclip = self.crects.first
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sirebral
parents:
diff changeset
471 while pchclip:
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sirebral
parents:
diff changeset
472 crect=pcvclip.bounds.intersect(pchclip.bounds)
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sirebral
parents:
diff changeset
473 if crect.IsValid():
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sirebral
parents:
diff changeset
474 newclip=self.__AllocClipRect()
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sirebral
parents:
diff changeset
475 newclip.bounds=crect
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sirebral
parents:
diff changeset
476 clist.AddRect(newclip)
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sirebral
parents:
diff changeset
477 pchclip = pchclip.next
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sirebral
parents:
diff changeset
478 pcvclip = pcvclip.next
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sirebral
parents:
diff changeset
479 self.Clear()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
480 self.crects.StealRects(clist)
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sirebral
parents:
diff changeset
481 self.Optimize()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
482
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
483 def GetBounds(self):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
484 bounds=IRect()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
485 pcclip = self.crects.first
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sirebral
parents:
diff changeset
486 while pcclip:
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sirebral
parents:
diff changeset
487 bounds=bounds.union(pcclip.bounds)
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sirebral
parents:
diff changeset
488 pcclip = pcclip.next
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sirebral
parents:
diff changeset
489 return bounds
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sirebral
parents:
diff changeset
490
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
491 def Optimize(self):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
492 clist=self.crects.GetList()
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sirebral
parents:
diff changeset
493 removed=[]
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
494 keepgoing = 1
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
495 while len(clist)>1 and keepgoing:
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sirebral
parents:
diff changeset
496 keepgoing=0
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
497 clist.sort(lambda a,b:_vSortCmp(a,b))
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
498 keys=range(len(clist)-1)
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sirebral
parents:
diff changeset
499 keys.reverse()
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sirebral
parents:
diff changeset
500 for i in keys:
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sirebral
parents:
diff changeset
501 if (clist[i].bounds.right==clist[i+1].bounds.left-1 and
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
502 clist[i].bounds.top==clist[i+1].bounds.top and
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
503 clist[i].bounds.bottom==clist[i+1].bounds.bottom):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
504 clist[i].bounds.right=clist[i+1].bounds.right
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sirebral
parents:
diff changeset
505 x=clist[i+1]
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sirebral
parents:
diff changeset
506 del clist[i+1]
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sirebral
parents:
diff changeset
507 self.crects.RemoveRect(x)
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sirebral
parents:
diff changeset
508 self.__FreeClipRect(x)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
509 keepgoing=1
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
510 if len(clist)<=1: break
0
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
511 clist.sort(lambda a,b:_hSortCmp(a,b))
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
512 keys=range(len(clist)-1)
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sirebral
parents:
diff changeset
513 keys.reverse()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
514 for i in keys:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
515 if (clist[i].bounds.bottom==clist[i+1].bounds.top-1 and
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
516 clist[i].bounds.left==clist[i+1].bounds.left and
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
517 clist[i].bounds.right==clist[i+1].bounds.right):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
518 clist[i].bounds.bottom=clist[i+1].bounds.bottom
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sirebral
parents:
diff changeset
519 x=clist[i+1]
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sirebral
parents:
diff changeset
520 del clist[i+1]
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sirebral
parents:
diff changeset
521 self.crects.RemoveRect(x)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
522 self.__FreeClipRect(x)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
523 keepgoing=1
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
524
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
525 def FromPolygon(self,polypt,mode):
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sirebral
parents:
diff changeset
526 thelist=self.scan_Convert(polypt)
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sirebral
parents:
diff changeset
527 for i in thelist:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
528 r=IRect().make(i.left,i.y,i.right,i.y)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
529 if mode:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
530 self.__Examine(r)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
531 self.__IncludeRect(r)
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
532 else: self.__ExcludeRect(r)
0
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
533 self.Optimize()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
534
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
535 def GetRectList(self):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
536 result=[]
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
537 i = self.crects.first
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
538 while i:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
539 result.append(i.bounds)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
540 i = i.next
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
541 return result
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
542
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
543 #Portable implementation to scan-convert a polygon
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
544 #from algoritm described in Section 3.6.3 of Foley, et al
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sirebral
parents:
diff changeset
545 #returns a (possibly redundant) list of spans that comprise the polygon
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
546 #this routine does not manipulate the current region in any way, but
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
547 #is enclosed in this class to isolate its name from the global namespace
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
548 #invoke via IRegion().scan_Convert(polypt)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
549
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
550 def scan_Convert(self,polypt):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
551 result=[]
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
552 ET = {} # edge table
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
553 i = 0
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
554 size = len(polypt)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
555 polylines=[] # list of lines in polygon
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
556 y = -1
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
557 for i in xrange(size):
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
558 n = (i+1) % size
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
559 if polypt[i].Y < polypt[n].Y:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
560 e = Edge(polypt[i],polypt[n])
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
561 e.dir = 1 #moving top to bottom
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
562 polylines.append(e)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
563 elif polypt[i].Y > polypt[n].Y:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
564 e = Edge(polypt[n],polypt[i])
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
565 e.dir = -1 #moving bottom to top
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
566 polylines.append(e)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
567 elif polypt[i].X != polypt[n].X: # any horizontal lines just get added directly
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
568 sx = min(polypt[i].X,polypt[n].X)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
569 ex = max(polypt[i].X,polypt[n].X)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
570 result.append(ISpan(sx,ex,polypt[i].Y))
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
571 size = len(polylines)
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
572 for i in xrange(size):
20
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
573 if i == 0 and polylines[i].dir == -1: n = size-1
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
574 elif (polylines[i].dir == -1): n = i-1
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
575 else: n = (i+1) % size
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
576 if (polylines[i].dir != polylines[n].dir): polylines[i].bottom = 1
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
577 if i == 0 or polylines[i].starty < y: y = polylines[i].starty
072ffc1d466f 2nd attempt. Still untested.
sirebral
parents: 0
diff changeset
578 if not ET.has_key(polylines[i].starty): ET[polylines[i].starty] = []
0
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
579 ET[polylines[i].starty].append(polylines[i]) #add to edge table, indexed by smaller y coordinate
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
580 AET = [] #active edge table
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
581 while len(AET) > 0 or len(ET) > 0:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
582 if ET.has_key(y): #if current y value has entries in edge tabe
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
583 AET.extend(ET[y]) # add them to active edge table
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
584 del ET[y] #and delete the entries in the edge table
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
585 i = len(AET)-1
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
586 vals = []
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
587 while i >= 0:
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
588 if (AET[i].endy == y): #if at the end of this edge's run
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
589 if (AET[i].bottom): #check and see if we need one more point
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
590 vals.append(AET[i].cx) #we do, add it
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
591 del AET[i] # y=end of edge, so remove it
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
592 i -= 1
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
593 i = 0
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
594 while i < len(AET): # for every edge in AET
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
595 vals.append(AET[i].cx) # add x intercept
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
596 AET[i].advance() #and advance the edge one down
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
597 i += 1
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
598 vals.sort()
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
599 i = 0
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
600 while i < len(vals)-1: #split vals[] array into pairs and output them
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
601 result.append(ISpan(vals[i],vals[i+1],y))
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
602 i += 2
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
603 y += 1
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
sirebral
parents:
diff changeset
604 return result