/
SpatialReference.cpp
1140 lines (983 loc) · 31.6 KB
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SpatialReference.cpp
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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2008-2010 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#include "SpatialReference"
#include <OpenThreads/ScopedLock>
#include <osg/Notify>
#include <ogr_api.h>
#include <ogr_spatialref.h>
#include <algorithm>
#include <sstream>
#define LC "[SpatialReference] "
//using namespace osgEarth;
#define USE_CUSTOM_MERCATOR_TRANSFORM 1
//#undef USE_CUSTOM_MERCATOR_TRANSFORM
#define OE_WARN osg::notify(osg::WARN)
#define OE_INFO osg::notify(osg::INFO)
//------------------------------------------------------------------------
#define GDAL_SCOPED_LOCK
/*namespace
{*/
std::string
getOGRAttrValue( void* _handle, const std::string& name, int child_num, bool lowercase =false)
{
GDAL_SCOPED_LOCK;
const char* val = OSRGetAttrValue( _handle, name.c_str(), child_num );
if ( val )
{
std::string t = val;
if ( lowercase )
{
std::transform( t.begin(), t.end(), t.begin(), ::tolower );
}
return t;
}
return "";
}
std::string&
replaceIn( std::string& s, const std::string& sub, const std::string& other)
{
if ( sub.empty() ) return s;
size_t b=0;
for( ; ; )
{
b = s.find( sub, b );
if ( b == s.npos ) break;
s.replace( b, sub.size(), other );
b += other.size();
}
return s;
}
//}
//------------------------------------------------------------------------
SpatialReference::SpatialReferenceCache& SpatialReference::getSpatialReferenceCache()
{
//Make sure the registry is created before the cache
//osgEarth::Registry::instance();
static SpatialReferenceCache s_cache;
return s_cache;
}
SpatialReference*
SpatialReference::createFromPROJ4( const std::string& init, const std::string& init_alias, const std::string& name )
{
SpatialReference* result = NULL;
GDAL_SCOPED_LOCK;
void* handle = OSRNewSpatialReference( NULL );
if ( OSRImportFromProj4( handle, init.c_str() ) == OGRERR_NONE )
{
result = new SpatialReference( handle, "PROJ4", init_alias, name );
}
else
{
OE_WARN << LC << "Unable to create spatial reference from PROJ4: " << init << std::endl;
OSRDestroySpatialReference( handle );
}
return result;
}
/*SpatialReference*
SpatialReference::createCube()
{
// root the cube srs with a WGS84 intermediate ellipsoid.
std::string init = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs";
SpatialReference* result = NULL;
GDAL_SCOPED_LOCK;
void* handle = OSRNewSpatialReference( NULL );
if ( OSRImportFromProj4( handle, init.c_str() ) == OGRERR_NONE )
{
result = new CubeSpatialReference( handle );
}
else
{
OE_WARN << LC << "Unable to create SRS: " << init << std::endl;
OSRDestroySpatialReference( handle );
}
return result;
}
*/
#if 0
SpatialReference*
SpatialReference::createLTP( const osg::Vec3d& refPointLLA, const SpatialReference* geoSRS )
{
GDAL_SCOPED_LOCK;
void* handle = OSRNewSpatialReference( NULL );
bool ok = false;
SpatialReference* result = 0L;
if ( geoSRS )
{
std::string init = geoSRS->getGeographicSRS()->getWKT();
char buf[4096];
char* buf_ptr = &buf[0];
strcpy( buf, init.c_str() );
ok = ( OSRImportFromWkt( handle, &buf_ptr ) == OGRERR_NONE );
}
else
{
std::string init = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs";
ok = ( OSRImportFromProj4( handle, init.c_str() ) == OGRERR_NONE );
}
if ( ok )
{
result = new LTPSpatialReference( handle, refPointLLA );
}
else
{
OE_WARN << LC << "Unable to create LTP SRS" << std::endl;
if ( handle )
OSRDestroySpatialReference( handle );
}
return result;
}
#endif
SpatialReference*
SpatialReference::createFromWKT( const std::string& init, const std::string& init_alias, const std::string& name )
{
osg::ref_ptr<SpatialReference> result;
GDAL_SCOPED_LOCK;
void* handle = OSRNewSpatialReference( NULL );
char buf[4096];
char* buf_ptr = &buf[0];
strcpy( buf, init.c_str() );
if ( OSRImportFromWkt( handle, &buf_ptr ) == OGRERR_NONE )
{
result = new SpatialReference( handle, "WKT", init_alias, name );
result = result->validate();
}
else
{
OE_WARN << LC << "Unable to create spatial reference from WKT: " << init << std::endl;
OSRDestroySpatialReference( handle );
}
return result.release();
}
SpatialReference*
SpatialReference::create( const std::string& init )
{
static OpenThreads::Mutex s_mutex;
OpenThreads::ScopedLock<OpenThreads::Mutex> exclusiveLock(s_mutex);
std::string low = init;
std::transform( low.begin(), low.end(), low.begin(), ::tolower );
SpatialReferenceCache::iterator itr = getSpatialReferenceCache().find(init);
if (itr != getSpatialReferenceCache().end())
{
//OE_NOTICE << "Returning cached SRS" << std::endl;
return itr->second.get();
}
osg::ref_ptr<SpatialReference> srs;
// shortcut for spherical-mercator:
if (low == "spherical-mercator" || low == "epsg:900913" || low == "epsg:3785" ||
low == "epsg:41001" || low == "epsg:102113" || low == "epsg:102100")
{
// note the use of nadgrids=@null (see http://proj.maptools.org/faq.html)
// adjusted +a by ONE to work around osg manipulator error until we can figure out why.. GW
srs = createFromPROJ4(
"+proj=merc +a=6378137 +b=6378137 +lon_0=0 +k=1 +x_0=0 +y_0=0 +nadgrids=@null +units=m +no_defs",
init,
"Spherical Mercator" );
}
// ellipsoidal ("world") mercator:
else if (low == "epsg:54004" || low == "epsg:9804" || low == "epsg:3832")
{
srs = createFromPROJ4(
"+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs",
init,
"World Mercator" );
}
// common WGS84:
else if (low == "epsg:4326" || low == "wgs84")
{
srs = createFromPROJ4(
"+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs",
init,
"WGS84" );
}
// custom srs for the unified cube
/* else if ( low == "unified-cube" )
{
srs = createCube();
}
*/
else if ( low.find( "+" ) == 0 )
{
srs = createFromPROJ4( low, init );
}
else if ( low.find( "epsg:" ) == 0 || low.find( "osgeo:" ) == 0 )
{
srs = createFromPROJ4( std::string("+init=") + low, init );
}
else if ( low.find( "projcs" ) == 0 || low.find( "geogcs" ) == 0 )
{
srs = createFromWKT( init, init );
}
else
{
return NULL;
}
getSpatialReferenceCache()[init] = srs;
return srs.get();
}
SpatialReference*
SpatialReference::create( osg::CoordinateSystemNode* csn )
{
SpatialReference* result = NULL;
if ( csn && !csn->getCoordinateSystem().empty() )
{
result = create( csn->getCoordinateSystem() );
}
return result;
}
SpatialReference*
SpatialReference::createFromHandle( void* ogrHandle, bool xferOwnership )
{
SpatialReference* srs = new SpatialReference( ogrHandle, xferOwnership );
return srs;
}
SpatialReference*
SpatialReference::validate()
{
std::string proj = getOGRAttrValue( _handle, "PROJECTION", 0 );
// fix invalid ESRI LCC projections:
if ( proj == "Lambert_Conformal_Conic" )
{
bool has_2_sps =
!getOGRAttrValue( _handle, "Standard_Parallel_2", 0 ).empty() ||
!getOGRAttrValue( _handle, "standard_parallel_2", 0 ).empty();
std::string new_wkt = getWKT();
if ( has_2_sps )
replaceIn( new_wkt, "Lambert_Conformal_Conic", "Lambert_Conformal_Conic_2SP" );
else
replaceIn( new_wkt, "Lambert_Conformal_Conic", "Lambert_Conformal_Conic_1SP" );
OE_INFO << LC << "Morphing Lambert_Conformal_Conic to 1SP/2SP" << std::endl;
return createFromWKT( new_wkt, _init_str, _name );
}
// fixes for ESRI Plate_Carree and Equidistant_Cylindrical projections:
else if ( proj == "Plate_Carree" )
{
std::string new_wkt = getWKT();
replaceIn( new_wkt, "Plate_Carree", "Equirectangular" );
OE_INFO << LC << "Morphing Plate_Carree to Equirectangular" << std::endl;
return createFromWKT( new_wkt, _init_str, _name ); //, input->getReferenceFrame() );
}
else if ( proj == "Equidistant_Cylindrical" )
{
std::string new_wkt = getWKT();
OE_INFO << LC << "Morphing Equidistant_Cylindrical to Equirectangular" << std::endl;
replaceIn( new_wkt, "Equidistant_Cylindrical", "Equirectangular" );
return createFromWKT( new_wkt, _init_str, _name );
}
// no changes.
return this;
}
/****************************************************************************/
SpatialReference::SpatialReference(void* handle,
const std::string& init_type,
const std::string& init_str,
const std::string& name ) :
osg::Referenced( true ),
_initialized( false ),
_handle( handle ),
_owns_handle( true ),
_name( name ),
_init_type( init_type ),
_init_str( init_str )
{
_init_str_lc = init_str;
std::transform( _init_str_lc.begin(), _init_str_lc.end(), _init_str_lc.begin(), ::tolower );
}
SpatialReference::SpatialReference(void* handle, bool ownsHandle) :
osg::Referenced( true ),
_initialized( false ),
_handle( handle ),
_owns_handle( ownsHandle )
{
//nop
}
SpatialReference::~SpatialReference()
{
if ( _handle )
{
GDAL_SCOPED_LOCK;
for (TransformHandleCache::iterator itr = _transformHandleCache.begin(); itr != _transformHandleCache.end(); ++itr)
{
OCTDestroyCoordinateTransformation(itr->second);
}
if ( _owns_handle )
{
OSRDestroySpatialReference( _handle );
}
_handle = NULL;
}
}
bool
SpatialReference::isGeographic() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _is_geographic;
}
bool
SpatialReference::isProjected() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return !_is_geographic;
}
const std::string&
SpatialReference::getName() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _name;
}
const osg::EllipsoidModel*
SpatialReference::getEllipsoid() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _ellipsoid.get();
}
const std::string&
SpatialReference::getDatumName() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _datum;
}
const std::string&
SpatialReference::getWKT() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _wkt;
}
const std::string&
SpatialReference::getInitString() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _init_str;
}
const std::string&
SpatialReference::getInitType() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _init_type;
}
bool
SpatialReference::isEquivalentTo( const SpatialReference* rhs ) const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _isEquivalentTo( rhs );
}
bool
SpatialReference::_isEquivalentTo( const SpatialReference* rhs ) const
{
if ( !rhs )
return false;
if ( this == rhs )
return true;
if (isGeographic() != rhs->isGeographic() ||
isMercator() != rhs->isMercator() ||
isNorthPolar() != rhs->isNorthPolar() ||
isSouthPolar() != rhs->isSouthPolar() ||
isContiguous() != rhs->isContiguous() ||
isUserDefined() != rhs->isUserDefined() ||
isCube() != rhs->isCube() ||
isLTP() != rhs->isLTP() )
{
return false;
}
if ( _init_str_lc == rhs->_init_str_lc )
return true;
if ( this->getWKT() == rhs->getWKT() )
return true;
if (this->isGeographic() && rhs->isGeographic() &&
this->getEllipsoid()->getRadiusEquator() == rhs->getEllipsoid()->getRadiusEquator() &&
this->getEllipsoid()->getRadiusPolar() == rhs->getEllipsoid()->getRadiusPolar())
{
return true;
}
// last resort, since it requires the lock
GDAL_SCOPED_LOCK;
return TRUE == ::OSRIsSame( _handle, rhs->_handle );
}
const SpatialReference*
SpatialReference::getGeographicSRS() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
if ( _is_geographic )
return this;
if ( !_geo_srs.valid() )
{
GDAL_SCOPED_LOCK;
if ( !_geo_srs.valid() ) // double-check pattern
{
void* new_handle = OSRNewSpatialReference( NULL );
int err = OSRCopyGeogCSFrom( new_handle, _handle );
if ( err == OGRERR_NONE )
{
const_cast<SpatialReference*>(this)->_geo_srs = new SpatialReference( new_handle );
}
else
{
OSRDestroySpatialReference( new_handle );
}
}
}
return _geo_srs.get();
}
/*
SpatialReference*
SpatialReference::createTangentPlaneSRS( const osg::Vec3d& pos ) const
{
SpatialReference* result = 0L;
osg::Vec3d lla;
if ( this->transform(pos, this->getGeographicSRS(), lla) )
{
result = new LTPSpatialReference( this->getGeographicSRS()->_handle, lla );
}
else
{
OE_WARN << LC << "Unable to create LTP SRS" << std::endl;
}
return result;
}
*/
bool
SpatialReference::isMercator() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _is_mercator;
}
bool
SpatialReference::isNorthPolar() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _is_north_polar;
}
bool
SpatialReference::isSouthPolar() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _is_south_polar;
}
bool
SpatialReference::isContiguous() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _is_contiguous;
}
bool
SpatialReference::isUserDefined() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _is_user_defined;
}
bool
SpatialReference::isCube() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
return _is_cube;
}
osg::CoordinateSystemNode*
SpatialReference::createCoordinateSystemNode() const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
osg::CoordinateSystemNode* csn = new osg::CoordinateSystemNode();
populateCoordinateSystemNode( csn );
return csn;
}
bool
SpatialReference::populateCoordinateSystemNode( osg::CoordinateSystemNode* csn ) const
{
if ( !csn )
return false;
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
if ( !_wkt.empty() )
{
csn->setFormat( "WKT" );
csn->setCoordinateSystem( _wkt );
}
else if ( !_proj4.empty() )
{
csn->setFormat( "PROJ4" );
csn->setCoordinateSystem( _proj4 );
}
else
{
csn->setFormat( _init_type );
csn->setCoordinateSystem( _init_str );
}
csn->setEllipsoidModel( _ellipsoid.get() );
return true;
}
// Make a MatrixTransform suitable for use with a Locator object based on the given extents.
// Calling Locator::setTransformAsExtents doesn't work with OSG 2.6 due to the fact that the
// _inverse member isn't updated properly. Calling Locator::setTransform works correctly.
static osg::Matrixd
getTransformFromExtents(double minX, double minY, double maxX, double maxY)
{
osg::Matrixd transform;
transform.set(
maxX-minX, 0.0, 0.0, 0.0,
0.0, maxY-minY, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
minX, minY, 0.0, 1.0);
return transform;
}
/*GeoLocator*
SpatialReference::createLocator(double xmin, double ymin, double xmax, double ymax,
bool plate_carre ) const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
GeoLocator* locator = new GeoLocator( GeoExtent(this, xmin, ymin, xmax, ymax) );
locator->setEllipsoidModel( (osg::EllipsoidModel*)getEllipsoid() );
locator->setCoordinateSystemType( isGeographic()? osgTerrain::Locator::GEOGRAPHIC : osgTerrain::Locator::PROJECTED );
// note: not setting the format/cs on purpose.
if ( isGeographic() && !plate_carre )
{
locator->setTransform( getTransformFromExtents(
osg::DegreesToRadians( xmin ),
osg::DegreesToRadians( ymin ),
osg::DegreesToRadians( xmax ),
osg::DegreesToRadians( ymax ) ) );
}
else
{
locator->setTransform( getTransformFromExtents( xmin, ymin, xmax, ymax ) );
}
return locator;
}
*/
bool
SpatialReference::transform(double x, double y, double z,
const SpatialReference* out_srs,
double& out_x, double& out_y, double& out_z,
void* context ) const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
//Check for equivalence and return if the coordinate systems are the same.
if (isEquivalentTo(out_srs))
{
out_x = x;
out_y = y;
out_z = z;
return true;
}
out_x = x;
out_y = y;
bool result = transformPoints(out_srs, &out_x, &out_y, &out_z, 1, context);
return result;
}
// http://en.wikipedia.org/wiki/Mercator_projection#Mathematics_of_the_projection
static bool
mercatorToGeographic( double* x, double* y, double* z, int numPoints )
{
for( int i=0; i<numPoints; i++ )
{
double xr = -osg::PI + ((x[i]-MERC_MINX)/MERC_WIDTH)*2.0*osg::PI;
double yr = -osg::PI + ((y[i]-MERC_MINY)/MERC_HEIGHT)*2.0*osg::PI;
x[i] = osg::RadiansToDegrees( xr );
y[i] = osg::RadiansToDegrees( 2.0 * atan( exp(yr) ) - osg::PI_2 );
// z doesn't change
}
return true;
}
// http://en.wikipedia.org/wiki/Mercator_projection#Mathematics_of_the_projection
static bool
geographicToMercator( double* x, double* y, double* z, int numPoints )
{
for( int i=0; i<numPoints; i++ )
{
double xr = (osg::DegreesToRadians(x[i]) - (-osg::PI)) / (2.0*osg::PI);
double sinLat = sin(osg::DegreesToRadians(y[i]));
double oneMinusSinLat = 1-sinLat;
if ( oneMinusSinLat != 0.0 )
{
double yr = ((0.5 * log( (1+sinLat)/oneMinusSinLat )) - (-osg::PI)) / (2.0*osg::PI);
x[i] = MERC_MINX + (xr * MERC_WIDTH);
y[i] = MERC_MINY + (yr * MERC_HEIGHT);
// z doesn't change
}
}
return true;
}
bool
SpatialReference::transformPoints(const SpatialReference* out_srs,
double* x, double* y, double* z,
unsigned int numPoints,
void* context,
bool ignore_errors ) const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
//Check for equivalence and return if the coordinate systems are the same.
if (isEquivalentTo(out_srs))
return true;
if ( z )
{
for (unsigned int i = 0; i < numPoints; ++i)
preTransform(x[i], y[i], z[i], context);
}
else
{
double dummyZ = 0.0;
for (unsigned int i = 0; i < numPoints; ++i)
preTransform(x[i], y[i], dummyZ, context);
}
bool success = false;
#ifdef USE_CUSTOM_MERCATOR_TRANSFORM
if ( isGeographic() && out_srs->isMercator() )
{
success = geographicToMercator( x, y, z, numPoints );
}
else if ( isMercator() && out_srs->isGeographic() )
{
success = mercatorToGeographic( x, y, z, numPoints );
}
else
#endif
{
GDAL_SCOPED_LOCK;
void* xform_handle = NULL;
TransformHandleCache::const_iterator itr = _transformHandleCache.find(out_srs->getWKT());
if (itr != _transformHandleCache.end())
{
//OE_DEBUG << "SpatialRefernece: using cached transform handle" << std::endl;
xform_handle = itr->second;
}
else
{
xform_handle = OCTNewCoordinateTransformation( _handle, out_srs->_handle);
const_cast<SpatialReference*>(this)->_transformHandleCache[out_srs->getWKT()] = xform_handle;
}
if ( !xform_handle )
{
OE_WARN << LC
<< "SRS xform not possible" << std::endl
<< " From => " << getName() << std::endl
<< " To => " << out_srs->getName() << std::endl;
return false;
}
//double* temp_z = new double[numPoints];
//success = OCTTransform( xform_handle, numPoints, x, y, temp_z ) > 0;
//delete[] temp_z;
success = OCTTransform( xform_handle, numPoints, x, y, z ) > 0;
// END GDAL_SCOPE_LOCK
}
if ( success || ignore_errors )
{
if ( z )
{
for (unsigned int i = 0; i < numPoints; ++i)
out_srs->postTransform(x[i], y[i], z[i], context);
}
else
{
double dummyZ = 0.0;
for (unsigned int i = 0; i < numPoints; ++i)
out_srs->postTransform(x[i], y[i], dummyZ, context);
}
}
else
{
OE_WARN << LC << "Failed to xform a point from "
<< getName() << " to " << out_srs->getName()
<< std::endl;
}
return success;
}
bool
SpatialReference::transformPoints(const SpatialReference* out_srs,
std::vector<osg::Vec3d>& points,
void* context,
bool ignore_errors ) const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
//Check for equivalence and return if the coordinate systems are the same.
if (isEquivalentTo(out_srs))
return true;
int numPoints = points.size();
double* x = new double[numPoints];
double* y = new double[numPoints];
double* z = new double[numPoints];
for( int i=0; i<numPoints; i++ )
{
x[i] = points[i].x();
y[i] = points[i].y();
z[i] = points[i].z();
}
bool success = transformPoints( out_srs, x, y, z, numPoints, context, ignore_errors );
if ( success )
{
for( int i=0; i<numPoints; i++ )
{
points[i].x() = x[i];
points[i].y() = y[i];
points[i].z() = z[i];
}
}
delete[] x;
delete[] y;
delete[] z;
return success;
}
bool
SpatialReference::transformToECEF(const osg::Vec3d& input,
osg::Vec3d& output ) const
{
double lat = input.y(), lon = input.x(), alt = input.z();
// first convert to lat/long if necessary:
if ( !isGeographic() )
transform( input.x(), input.y(), input.z(), getGeographicSRS(), lon, lat, alt );
// then convert to ECEF.
//double z = input.z();
getGeographicSRS()->getEllipsoid()->convertLatLongHeightToXYZ(
osg::DegreesToRadians( lat ), osg::DegreesToRadians( lon ), alt,
output.x(), output.y(), output.z() );
return true;
}
bool
SpatialReference::transformToECEF(std::vector<osg::Vec3d>& points,
bool ignoreErrors ) const
{
if ( points.size() == 0 )
return false;
const SpatialReference* geoSRS = getGeographicSRS();
const osg::EllipsoidModel* ellipsoid = geoSRS->getEllipsoid();
for( unsigned i=0; i<points.size(); ++i )
{
osg::Vec3d& p = points[i];
if ( !isGeographic() )
transform( p.x(), p.y(), p.z(), geoSRS, p.x(), p.y(), p.z() );
ellipsoid->convertLatLongHeightToXYZ(
osg::DegreesToRadians( p.y() ), osg::DegreesToRadians( p.x() ), p.z(),
p.x(), p.y(), p.z() );
}
return true;
}
bool
SpatialReference::transformFromECEF(const osg::Vec3d& input,
osg::Vec3d& output ) const
{
// transform to lat/long:
osg::Vec3d geo;
getGeographicSRS()->getEllipsoid()->convertXYZToLatLongHeight(
input.x(), input.y(), input.z(),
geo.y(), geo.x(), geo.z() );
// then convert to the local SRS.
if ( isGeographic() )
{
output.set( osg::RadiansToDegrees(geo.x()), osg::RadiansToDegrees(geo.y()), geo.z() );
}
else
{
getGeographicSRS()->transform(
osg::RadiansToDegrees(geo.x()), osg::RadiansToDegrees(geo.y()), geo.z(),
this,
output.x(), output.y(), output.z() );
//output.z() = geo.z();
}
return true;
}
bool
SpatialReference::transformFromECEF(std::vector<osg::Vec3d>& points,
bool ignoreErrors ) const
{
bool ok = true;
// first convert all the points to lat/long (in place):
for( unsigned i=0; i<points.size(); ++i )
{
osg::Vec3d& p = points[i];
osg::Vec3d geo;
getGeographicSRS()->getEllipsoid()->convertXYZToLatLongHeight(
p.x(), p.y(), p.z(),
geo.y(), geo.x(), geo.z() );
geo.x() = osg::RadiansToDegrees( geo.x() );
geo.y() = osg::RadiansToDegrees( geo.y() );
p = geo;
}
// then convert them all to the local SRS if necessary.
if ( !isGeographic() )
{
ok = getGeographicSRS()->transformPoints( this, points, 0L, ignoreErrors );
}
return ok;
}
bool
SpatialReference::transformExtent(const SpatialReference* to_srs,
double& in_out_xmin,
double& in_out_ymin,
double& in_out_xmax,
double& in_out_ymax,
void* context ) const
{
if ( !_initialized )
const_cast<SpatialReference*>(this)->init();
int oks = 0;
//Transform all points and take the maximum bounding rectangle the resulting points
double llx, lly;
double ulx, uly;
double urx, ury;
double lrx, lry;
double dummyZ = 0;
//Lower Left
oks += transform( in_out_xmin, in_out_ymin, 0, to_srs, llx, lly, dummyZ, context ) == true;
//Upper Left
oks += transform( in_out_xmin, in_out_ymax, 0, to_srs, ulx, uly, dummyZ, context ) == true;
//Upper Right
oks += transform( in_out_xmax, in_out_ymax, 0, to_srs, urx, ury, dummyZ, context ) == true;
//Lower Right
oks += transform( in_out_xmax, in_out_ymin, 0, to_srs, lrx, lry, dummyZ, context ) == true;
if (oks == 4)