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
|
// Copyright 2008, Google Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// 3. Neither the name of Google Inc. nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This program generates GroundOverlays with Regions. The two overlays have
// exclusive Lods on their Regions, hence they swap as the viewpoint changes.
#include <iostream>
#include <string>
#include "kml/dom.h"
using kmldom::FolderPtr;
using kmldom::GroundOverlayPtr;
using kmldom::KmlPtr;
using kmldom::KmlFactory;
using kmldom::LatLonAltBoxPtr;
using kmldom::LatLonBoxPtr;
using kmldom::LodPtr;
using kmldom::RegionPtr;
// Declare functions defined in this file.
static GroundOverlayPtr CreateGroundOverlay(double north, double south,
double east, double west,
const std::string& name,
const std::string& color);
static RegionPtr CreateRegion(double north, double south,
double east, double west,
double minlodpixels, double maxlodpixels);
void SwapOverlays();
// This creates a Region at the given bounding box with the given Lod range.
static RegionPtr CreateRegion(double north, double south,
double east, double west,
double minlodpixels, double maxlodpixels) {
KmlFactory* factory = KmlFactory::GetFactory();
RegionPtr region = factory->CreateRegion();
LatLonAltBoxPtr latlonaltbox = factory->CreateLatLonAltBox();
latlonaltbox->set_north(north);
latlonaltbox->set_south(south);
latlonaltbox->set_east(east);
latlonaltbox->set_west(west);
LodPtr lod = factory->CreateLod();
lod->set_minlodpixels(minlodpixels);
lod->set_maxlodpixels(maxlodpixels);
region->set_latlonaltbox(latlonaltbox);
region->set_lod(lod);
return region;
}
// This creates a GroundOverlay at the given bounding box.
// Since there is no Icon (image) a polygon of the given color is drawn.
static GroundOverlayPtr CreateGroundOverlay(double north, double south,
double east, double west,
const std::string& name,
const std::string& color) {
KmlFactory* factory = KmlFactory::GetFactory();
GroundOverlayPtr groundoverlay = factory->CreateGroundOverlay();
groundoverlay->set_name(name);
LatLonBoxPtr latlonbox = factory->CreateLatLonBox();
latlonbox->set_north(north);
latlonbox->set_south(south);
latlonbox->set_east(east);
latlonbox->set_west(west);
groundoverlay->set_latlonbox(latlonbox);
groundoverlay->set_color(color);
return groundoverlay;
}
// This uses Regions to make a clean swap between overlays.
// Set minLodPixels of one Region to the same as maxLodPixels of the other.
void SwapOverlays() {
KmlFactory* factory = KmlFactory::GetFactory();
double north = 10;
double south = -10;
double east = 10;
double west = -10;
double lod_a = 128; // 128 x 128 pixels
double lod_b = 512;
double lod_c = 1024;
std::string solid_red("ff0000ff"); // aabbggrr
std::string solid_blue("ffff0000");
// Create a solid red GroundOverlay.
GroundOverlayPtr red =
CreateGroundOverlay(north, south, east, west, "Red", solid_red);
// Give it a Region with lod range a - b
red->set_region(CreateRegion(north, south, east, west, lod_a, lod_b));
// Create a solid blue GroundOverlay.
GroundOverlayPtr blue =
CreateGroundOverlay(north, south, east, west, "Blue", solid_blue);
// Give it a Region with lod range b - c
blue->set_region(CreateRegion(north, south, east, west, lod_b, lod_c));
FolderPtr folder = factory->CreateFolder();
folder->set_name("Swap Overlays");
folder->add_feature(red);
folder->add_feature(blue);
KmlPtr kml = factory->CreateKml();
kml->set_feature(folder);
std::cout << kmldom::SerializePretty(kml);
}
int main(int argc, char** argv) {
SwapOverlays();
}
|
