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comparison orpg/mapper/isometric.py @ 0:4385a7d0efd1 grumpy-goblin

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Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
author sirebral
date Tue, 14 Jul 2009 16:41:58 -0500
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-1:000000000000 0:4385a7d0efd1
1 # Copyright (C) 2000-2001 The OpenRPG Project
2 #
3 # openrpg-dev@lists.sourceforge.net
4 #
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
9 #
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
14 #
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 # --
19 #
20 # File: mapper/isometric.py
21 # Author: Todd Faris (Snowdog)
22 # Maintainer:
23 # Version:
24 #
25 # Description:
26 # helper class definition for drawing and line collision within an isometric grid
27 # based on a interger based coordinate system where X increase to the right
28 # and Y increases in the downward direction
29
30
31 class IsoGrid:
32 def __init__(self,width):
33 self.ratio = 2.0
34 self.width = width
35 self.height = 0
36 self.CalcRatio()
37 self.center_x = 0
38 self.center_y = 0
39
40 def Ratio(self, r ):
41 "changes the height/width ratio of the isometric rectangle with respect to the horizontal (x) axis"
42 self.ratio = float(r)
43 self.CalcRatio()
44
45 def CalcRatio(self):
46 if (self.ratio <= 0): self.ratio = 1
47 self.height = int( float(self.width)/float(self.ratio) )
48
49 def BoundPlace(self, left,top):
50 "Places the isometric rectangle using its upper left bounding corner for positioning"
51 dx,dy = self.CornerOffset()
52 self.Recenter( left+dx, top+dy)
53
54 def Recenter(self,x,y):
55 "Places the isomentric rectangle using the centerpoint"
56 self.center_x = x
57 self.center_y = y
58
59 def Top(self):
60 "Returns the topmost point of the isometric rectangle as a tuple (x,y)"
61 x = int(self.center_x)
62 y = int(self.center_y) - int(self.height/2)
63 return(x,y)
64
65 def Left(self):
66 "Returns the leftmost point of the isometric rectangle as a tuple (x,y)"
67 x = int(self.center_x) - int(self.width/2)
68 y = int(self.center_y)
69 return(x,y)
70
71 def Right(self):
72 "Returns the rightmost point of the isometric rectangle as a tuple (x,y)"
73 x,y = self.Left()
74 x = x + self.width
75 return(x,y)
76
77 def Bottom(self):
78 "Returns the bottommost point of the isometric rectangle as a tuple (x,y)"
79 x,y = self.Top()
80 y = y + self.height
81 return(x,y)
82
83 def Center(self):
84 "Returns the center point of the isometric rectangle as a tuple (x,y)"
85 x = int(self.center_x)
86 y = int(self.center_y)
87 return(x,y)
88
89 def CornerOffset(self):
90 """Returns a tuple (delta_x,delta_y) representing the offset from the centerpoint
91 of the isometric rectangle to the upper left corner of its rectangular bounding box"""
92 dx = float(self.width/2)
93 dy = float(self.height/2)
94 return (dx,dy)
95
96 def Height(self):
97 "Returns the height of the isometric rectangle based on current ratio"
98 return int(self.height)
99
100 def Width(self):
101 "returns the width of the isomentric rectangle"
102 return int(self.width)