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// Copyright 2009, 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 sample program generates a gx:Tour of all visible features in the given
// KML or KMZ file. You supply two times (in seconds): a flyto_duration, used
// as the time taken to fly between features, and a wait_duration, used as the
// time spent dwelling at a feature before flying to the next.
// Example usage: ./featuretour /my/cool/file.kml 10.0 5.0 tour.kml
#include <iostream>
#include "kml/convenience/convenience.h"
#include "kml/base/file.h"
#include "kml/dom.h"
#include "kml/engine.h"
using kmlconvenience::CreateFlyToForFeature;
using kmlconvenience::CreateWait;
using kmldom::FeaturePtr;
using kmldom::GxFlyToPtr;
using kmldom::GxPlaylistPtr;
using kmldom::GxTourPtr;
using kmldom::KmlFactory;
using kmldom::KmlPtr;
using kmlengine::GetRootFeature;
using kmlengine::KmlFile;
using kmlengine::KmlFilePtr;
using kmlengine::VisitFeatureHierarchy;
using std::cerr;
using std::cout;
using std::endl;
// This subclass of FeatureVisitor takes each Feature in the KmlFile and
// attempts to generate a <gx:FlyTo> for that feature's view, appending it
// to a supplied gx:Playlist. The GxPlaylistPtr must be non-NULL.
class TourComposer : public kmlengine::FeatureVisitor {
public:
TourComposer(GxPlaylistPtr playlist, double flyto_duration,
double dwell_duration)
: playlist_(playlist), flyto_duration_(flyto_duration),
dwell_duration_(dwell_duration) {
}
virtual ~TourComposer() {}
// The callback from VisitFeatureHierarchy.
virtual void VisitFeature(const FeaturePtr& feature) {
if (!feature->get_visibility()) {
return; // Skip if not visible.
}
// CreateFlyToForFeature may return NULL.
GxFlyToPtr flyto = CreateFlyToForFeature(feature, flyto_duration_);
if (!flyto) {
return;
}
playlist_->add_gx_tourprimitive(flyto);
playlist_->add_gx_tourprimitive(CreateWait(dwell_duration_));
}
private:
GxPlaylistPtr playlist_;
double flyto_duration_;
double dwell_duration_;
};
static GxTourPtr GenerateTour(const KmlFilePtr& kml_file,
double flyto_duration, double dwell_duration) {
KmlFactory* factory = KmlFactory::GetFactory();
GxTourPtr tour = factory->CreateGxTour();
tour->set_name("Play me!");
GxPlaylistPtr playlist = factory->CreateGxPlaylist();
TourComposer tour_composer(playlist, flyto_duration, dwell_duration);
// Both VisitFeatureHierarchy and GetRootFeature are well-behaved with
// respect to NULL returns.
VisitFeatureHierarchy(GetRootFeature(kml_file->get_root()),
tour_composer);
tour->set_gx_playlist(playlist);
return tour;
}
static bool WriteTour(const GxTourPtr& tour, const char* outfile) {
KmlPtr kml = KmlFactory::GetFactory()->CreateKml();
kml->set_feature(tour);
KmlFilePtr kmlfile = KmlFile::CreateFromImport(kml);
if (!kmlfile) {
cerr << "Error: could not create KmlFile from tour" << endl;
return false;
}
std::string kml_data;
kmlfile->SerializeToString(&kml_data);
if (!kmlbase::File::WriteStringToFile(kml_data, outfile)) {
cerr << "write failed: " << outfile << endl;
return false;
}
cout << "wrote " << outfile << endl;
return true;
}
int main(int argc, char** argv) {
if (argc != 5) {
cerr << "usage: " << argv[0] <<
" input.kml flyto_duration wait_duration output.kml" << endl;
return -1;
}
std::string kml_data;
if (!kmlbase::File::ReadFileToString(argv[1], &kml_data)) {
cerr << "error: read of " << argv[1] << " failed" << endl;
return false;
}
std::string errors;
KmlFilePtr kml_file = KmlFile::CreateFromParse(kml_data, &errors);
if (!kml_file) {
cerr << "parse failed: " << errors << endl;;
return 1;
}
const double flyto_duration = strtod(argv[2], NULL);
const double dwell_duration = strtod(argv[3], NULL);
GxTourPtr tour = GenerateTour(kml_file, flyto_duration, dwell_duration);
if (!tour) {
cerr << "Could not create tour from " << argv[1] << endl;;
return 1;
}
return WriteTour(tour, argv[4]) ? 0 : 1;
}
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