source: subversion/applications/utils/srtm2shp/Map.h @ 30195

Last change on this file since 30195 was 6182, checked in by nick, 12 years ago

new and internationally-capable srtm2shp added

File size: 3.1 KB
Line 
1/*
2    Copyright (C) 2005 Nick Whitelegg, Hogweed Software, nick@hogweed.org
3
4    This program is free software; you can redistribute it and/or modify
5    it under the terms of the GNU Lesser General Public License as published by
6    the Free Software Foundation; either version 2 of the License, or
7    (at your option) any yer version.
8
9    This program is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12    GNU Lesser General Public License for more details.
13
14    You should have received a copy of the GNU Lesser General Public License
15    axg with this program; if not, write to the Free Software
16    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111 USA
17
18 */
19#ifndef MAP_H
20#define MAP_H
21
22#include "EarthPoint.h"
23#include <iostream>
24using namespace std;
25
26struct ScreenPos
27{
28    int x,y;
29
30    ScreenPos() { x=y=0; }
31    ScreenPos(int x1,int y1) { x=x1; y=y1; }
32};
33
34
35class Map
36{
37private:
38    EarthPoint bottomLeft, topRight;
39    double scale;
40
41public:
42    Map(double scale) { this->scale=scale; }
43
44    void setBBOX(double w,double s,double e,double n)
45    {
46        bottomLeft=EarthPoint(w,s);
47        topRight=EarthPoint(e,n);
48    }
49
50    void print() { 
51     EarthPoint p = getTopRight();
52     cout << "bottomLeft: "<< bottomLeft.x << ","<<bottomLeft.y<<
53     " topright:" << p.x<<","<<p.y << endl;
54    }
55
56    ScreenPos getScreenPos(const EarthPoint& pos)
57        { 
58            return ScreenPos (
59                            (pos.x-bottomLeft.x)*scale, 
60                            (topRight.y-pos.y)*scale
61                          ); 
62        }
63
64    ScreenPos getScreenPos(double x,double y)
65        { return getScreenPos(EarthPoint(x,y)); }
66
67    EarthPoint getEarthPoint(const ScreenPos& pos)
68        { return getEarthPoint(pos.x,pos.y); }
69
70    EarthPoint getEarthPoint(int x, int y)
71        { return EarthPoint( bottomLeft.x+(((double)x)/scale),
72                       topRight.y-(((double)y)/scale)); }
73
74    EarthPoint getTopLeft() { return EarthPoint(bottomLeft.x,topRight.y); }
75    EarthPoint getBottomRight() 
76        { return EarthPoint(topRight.x,bottomLeft.y); }
77    EarthPoint getTopRight() { return topRight; }
78   
79    void extend(double factor)
80    {
81                double dx = topRight.x-bottomLeft.x,
82                           dy = topRight.y-bottomLeft.y;
83        bottomLeft.x -= dx * factor;
84        bottomLeft.y -= dy * factor;
85        topRight.x += dx * factor;
86        topRight.y += dy * factor;
87    }
88         
89
90    EarthPoint getBottomLeft()
91        { return bottomLeft; }
92
93    double getScale()
94        { return scale; }
95
96    bool pt_within_map(const EarthPoint& ep)
97    {
98        return ep.x>=bottomLeft.x && ep.y>=bottomLeft.y&&
99               ep.x<=topRight.x && ep.y<=topRight.y; 
100    }
101
102    int getWidth(){return (topRight.x-bottomLeft.x)*scale;}
103    int getHeight(){return (topRight.y-bottomLeft.y)*scale;}
104
105    double earthDist(double pixelDist)
106        { return pixelDist/scale; }
107
108    EarthPoint getCentre(int w,int h)
109    {
110        return getEarthPoint(ScreenPos(w/2,h/2));
111    }
112};
113
114
115#endif
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