/**
* Creates a complete set of positioned label nodes from a feature list.
*/
osg::Node* createNode(
const FeatureList& input,
const Style& style,
FilterContext& context )
{
if ( style.get<TextSymbol>() == 0L && style.get<IconSymbol>() == 0L )
return 0L;
// copy the style so we can (potentially) modify the text symbol.
Style styleCopy = style;
TextSymbol* text = styleCopy.get<TextSymbol>();
IconSymbol* icon = styleCopy.get<IconSymbol>();
osg::Group* group = new osg::Group();
StringExpression textContentExpr ( text ? *text->content() : StringExpression() );
NumericExpression textPriorityExpr( text ? *text->priority() : NumericExpression() );
NumericExpression textSizeExpr ( text ? *text->size() : NumericExpression() );
StringExpression iconUrlExpr ( icon ? *icon->url() : StringExpression() );
NumericExpression iconScaleExpr ( icon ? *icon->scale() : NumericExpression() );
NumericExpression iconHeadingExpr ( icon ? *icon->heading() : NumericExpression() );
for( FeatureList::const_iterator i = input.begin(); i != input.end(); ++i )
{
Feature* feature = i->get();
if ( !feature )
continue;
// run a symbol script if present.
if ( text && text->script().isSet() )
{
StringExpression temp( text->script().get() );
feature->eval( temp, &context );
}
// run a symbol script if present.
if ( icon && icon->script().isSet() )
{
StringExpression temp( icon->script().get() );
feature->eval( temp, &context );
}
const Geometry* geom = feature->getGeometry();
if ( !geom )
continue;
Style tempStyle = styleCopy;
// evaluate expressions into literals.
// TODO: Later we could replace this with a generate "expression evaluator" type
// that we could pass to PlaceNode in the DB options. -gw
if ( text )
{
if ( text->content().isSet() )
tempStyle.get<TextSymbol>()->content()->setLiteral( feature->eval( textContentExpr, &context ) );
if ( text->size().isSet() )
tempStyle.get<TextSymbol>()->size()->setLiteral( feature->eval(textSizeExpr, &context) );
}
if ( icon )
{
if ( icon->url().isSet() )
tempStyle.get<IconSymbol>()->url()->setLiteral( feature->eval(iconUrlExpr, &context) );
if ( icon->scale().isSet() )
tempStyle.get<IconSymbol>()->scale()->setLiteral( feature->eval(iconScaleExpr, &context) );
if ( icon->heading().isSet() )
tempStyle.get<IconSymbol>()->heading()->setLiteral( feature->eval(iconHeadingExpr, &context) );
}
osg::Node* node = makePlaceNode(
context,
feature,
tempStyle,
textPriorityExpr);
if ( node )
{
if ( context.featureIndex() )
{
context.featureIndex()->tagNode(node, feature);
}
group->addChild( node );
}
}
// Note to self: need to change this to support picking later. -gw
//VirtualProgram* vp = VirtualProgram::getOrCreate(group->getOrCreateStateSet());
//vp->setInheritShaders( false );
return group;
}
//
// NOTE: run this sample from the repo/tests directory.
//
int main(int argc, char** argv)
{
osg::ArgumentParser arguments(&argc,argv);
if ( arguments.read("--help") )
return usage( argv[0] );
bool useRaster = arguments.read("--rasterize");
bool useOverlay = arguments.read("--overlay");
bool useStencil = arguments.read("--stencil");
bool useMem = arguments.read("--mem");
bool useLabels = arguments.read("--labels");
if ( useStencil )
osg::DisplaySettings::instance()->setMinimumNumStencilBits( 8 );
osgViewer::Viewer viewer(arguments);
// Start by creating the map:
Map* map = new Map();
// Start with a basemap imagery layer; we'll be using the GDAL driver
// to load a local GeoTIFF file:
GDALOptions basemapOpt;
basemapOpt.url() = "../data/world.tif";
map->addImageLayer( new ImageLayer( ImageLayerOptions("basemap", basemapOpt) ) );
// Next we add a feature layer.
OGRFeatureOptions featureOptions;
if ( !useMem )
{
// Configures the feature driver to load the vectors from a shapefile:
featureOptions.url() = "../data/world.shp";
}
else
{
// the --mem options tells us to just make an in-memory geometry:
Ring* line = new Ring();
line->push_back( osg::Vec3d(-60, 20, 0) );
line->push_back( osg::Vec3d(-120, 20, 0) );
line->push_back( osg::Vec3d(-120, 60, 0) );
line->push_back( osg::Vec3d(-60, 60, 0) );
featureOptions.geometry() = line;
}
// Define a style for the feature data. Since we are going to render the
// vectors as lines, configure the line symbolizer:
Style style;
LineSymbol* ls = style.getOrCreateSymbol<LineSymbol>();
ls->stroke()->color() = Color::Yellow;
ls->stroke()->width() = 2.0f;
// That's it, the map is ready; now create a MapNode to render the Map:
MapNodeOptions mapNodeOptions;
mapNodeOptions.enableLighting() = false;
MapNode* mapNode = new MapNode( map, mapNodeOptions );
osg::Group* root = new osg::Group();
root->addChild( mapNode );
viewer.setSceneData( root );
viewer.setCameraManipulator( new EarthManipulator() );
// Process cmdline args
MapNodeHelper().parse(mapNode, arguments, &viewer, root, new LabelControl("Features Demo"));
if (useStencil)
{
FeatureStencilModelOptions stencilOptions;
stencilOptions.featureOptions() = featureOptions;
stencilOptions.styles() = new StyleSheet();
stencilOptions.styles()->addStyle( style );
stencilOptions.enableLighting() = false;
stencilOptions.depthTestEnabled() = false;
ls->stroke()->width() = 0.1f;
map->addModelLayer( new ModelLayer("my features", stencilOptions) );
}
else if (useRaster)
{
AGGLiteOptions rasterOptions;
rasterOptions.featureOptions() = featureOptions;
rasterOptions.styles() = new StyleSheet();
rasterOptions.styles()->addStyle( style );
map->addImageLayer( new ImageLayer("my features", rasterOptions) );
}
else //if (useGeom || useOverlay)
{
FeatureGeomModelOptions geomOptions;
geomOptions.featureOptions() = featureOptions;
geomOptions.styles() = new StyleSheet();
geomOptions.styles()->addStyle( style );
geomOptions.enableLighting() = false;
ModelLayerOptions layerOptions( "my features", geomOptions );
map->addModelLayer( new ModelLayer(layerOptions) );
}
if ( useLabels )
{
// set up symbology for drawing labels. We're pulling the label
// text from the name attribute, and its draw priority from the
// population attribute.
Style labelStyle;
TextSymbol* text = labelStyle.getOrCreateSymbol<TextSymbol>();
text->content() = StringExpression( "[cntry_name]" );
text->priority() = NumericExpression( "[pop_cntry]" );
text->removeDuplicateLabels() = true;
text->size() = 16.0f;
text->alignment() = TextSymbol::ALIGN_CENTER_CENTER;
text->fill()->color() = Color::White;
text->halo()->color() = Color::DarkGray;
// and configure a model layer:
FeatureGeomModelOptions geomOptions;
geomOptions.featureOptions() = featureOptions;
geomOptions.styles() = new StyleSheet();
geomOptions.styles()->addStyle( labelStyle );
map->addModelLayer( new ModelLayer("labels", geomOptions) );
}
if ( !useStencil )
viewer.getCamera()->addCullCallback( new osgEarth::Util::AutoClipPlaneCullCallback(mapNode) );
// add some stock OSG handlers:
viewer.addEventHandler(new osgViewer::StatsHandler());
viewer.addEventHandler(new osgViewer::WindowSizeHandler());
viewer.addEventHandler(new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()));
return viewer.run();
}
bool
SLDReader::readStyleFromCSSParams( const Config& conf, Style& sc )
{
sc.setName( conf.key() );
LineSymbol* line = 0L;
PolygonSymbol* polygon = 0L;
PointSymbol* point = 0L;
TextSymbol* text = 0L;
ExtrusionSymbol* extrusion = 0L;
MarkerSymbol* marker = 0L;
AltitudeSymbol* altitude = 0L;
for(Properties::const_iterator p = conf.attrs().begin(); p != conf.attrs().end(); p++ )
{
if ( p->first == CSS_STROKE )
{
if (!line) line = sc.getOrCreateSymbol<LineSymbol>();
line->stroke()->color() = htmlColorToVec4f( p->second );
}
else if ( p->first == CSS_STROKE_OPACITY )
{
if (!line) line = sc.getOrCreateSymbol<LineSymbol>();
line->stroke()->color().a() = as<float>( p->second, 1.0f );
}
else if ( p->first == CSS_STROKE_WIDTH )
{
if (!line) line = sc.getOrCreateSymbol<LineSymbol>();
line->stroke()->width() = as<float>( p->second, 1.0f );
}
else if ( p->first == CSS_STROKE_LINECAP )
{
if (!line) line = sc.getOrCreateSymbol<LineSymbol>();
parseLineCap( p->second, line->stroke()->lineCap() );
}
else if ( p->first == CSS_FILL )
{
if (!polygon) polygon = sc.getOrCreateSymbol<PolygonSymbol>();
polygon->fill()->color() = htmlColorToVec4f( p->second );
if ( !point ) point = sc.getOrCreateSymbol<PointSymbol>();
point->fill()->color() = htmlColorToVec4f( p->second );
if ( !text ) text = new TextSymbol();
text->fill()->color() = htmlColorToVec4f( p->second );
}
else if ( p->first == CSS_FILL_OPACITY )
{
if (!polygon) polygon = sc.getOrCreateSymbol<PolygonSymbol>();
polygon->fill()->color().a() = as<float>( p->second, 1.0f );
if (!polygon) polygon = sc.getOrCreateSymbol<PolygonSymbol>();
point->fill()->color().a() = as<float>( p->second, 1.0f );
if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
text->fill()->color().a() = as<float>( p->second, 1.0f );
}
else if (p->first == CSS_POINT_SIZE)
{
if ( !point ) point = sc.getOrCreateSymbol<PointSymbol>();
point->size() = as<float>(p->second, 1.0f);
}
else if (p->first == CSS_TEXT_SIZE)
{
if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
text->size() = as<float>(p->second, 32.0f);
}
else if (p->first == CSS_TEXT_FONT)
{
if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
text->font() = p->second;
}
else if (p->first == CSS_TEXT_HALO)
{
if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
text->halo()->color() = htmlColorToVec4f( p->second );
}
//else if (p->first == CSS_TEXT_ATTRIBUTE)
//{
// if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
// text->attribute() = p->second;
//}
else if (p->first == CSS_TEXT_ROTATE_TO_SCREEN)
{
if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
if (p->second == "true") text->rotateToScreen() = true;
else if (p->second == "false") text->rotateToScreen() = false;
}
else if (p->first == CSS_TEXT_SIZE_MODE)
{
if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
if (p->second == "screen") text->sizeMode() = TextSymbol::SIZEMODE_SCREEN;
else if (p->second == "object") text->sizeMode() = TextSymbol::SIZEMODE_OBJECT;
}
else if (p->first == CSS_TEXT_REMOVE_DUPLICATE_LABELS)
{
if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
if (p->second == "true") text->removeDuplicateLabels() = true;
else if (p->second == "false") text->removeDuplicateLabels() = false;
}
else if (p->first == CSS_TEXT_LINE_ORIENTATION)
{
if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
if (p->second == "parallel") text->lineOrientation() = TextSymbol::LINEORIENTATION_PARALLEL;
else if (p->second == "horizontal") text->lineOrientation() = TextSymbol::LINEORIENTATION_HORIZONTAL;
else if (p->second == "perpendicular") text->lineOrientation() = TextSymbol::LINEORIENTATION_PERPENDICULAR;
}
else if (p->first == CSS_TEXT_LINE_PLACEMENT)
{
if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
if (p->second == "centroid") text->linePlacement() = TextSymbol::LINEPLACEMENT_CENTROID;
else if (p->second == "along-line") text->linePlacement() = TextSymbol::LINEPLACEMENT_ALONG_LINE;
}
else if (p->first == "text-content")
{
if (!text) text = sc.getOrCreate<TextSymbol>();
text->content() = StringExpression( p->second );
}
else if (p->first == "text-priority")
{
if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
text->priority() = NumericExpression( p->second );
}
else if (p->first == "text-provider")
{
if (!text) text = sc.getOrCreate<TextSymbol>();
text->provider() = p->second;
}
//else if (p->first == CSS_TEXT_CONTENT)
//{
// if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
// text->content() = p->second;
//}
//else if (p->first == CSS_TEXT_CONTENT_ATTRIBUTE_DELIMITER)
//{
// if (!text) text = sc.getOrCreateSymbol<TextSymbol>();
// text->contentAttributeDelimiter() = p->second;
//}
else if (p->first == "marker")
{
if (!marker) marker = sc.getOrCreateSymbol<MarkerSymbol>();
marker->url() = p->second;
}
else if (p->first == "marker-placement")
{
if (!marker) marker = sc.getOrCreateSymbol<MarkerSymbol>();
if (p->second == "centroid") marker->placement() = MarkerSymbol::PLACEMENT_CENTROID;
else if (p->second == "interval") marker->placement() = MarkerSymbol::PLACEMENT_INTERVAL;
else if (p->second == "random" ) marker->placement() = MarkerSymbol::PLACEMENT_RANDOM;
}
else if (p->first == "marker-density")
{
if (!marker) marker = sc.getOrCreateSymbol<MarkerSymbol>();
marker->density() = as<float>(p->second, 1.0f);
}
else if (p->first == "marker-random-seed")
{
if (!marker) marker = sc.getOrCreateSymbol<MarkerSymbol>();
marker->randomSeed() = as<unsigned>(p->second, 0);
}
else if (p->first == "marker-scale")
{
if (!marker) marker = sc.getOrCreateSymbol<MarkerSymbol>();
marker->scale() = stringToVec3f(p->second, osg::Vec3f(1,1,1));
}
else if (p->first == "extrusion-height")
{
if (!extrusion) extrusion = sc.getOrCreateSymbol<ExtrusionSymbol>();
extrusion->heightExpression() = NumericExpression(p->second);
}
else if (p->first == "extrusion-flatten")
{
if (!extrusion) extrusion = sc.getOrCreateSymbol<ExtrusionSymbol>();
extrusion->flatten() = as<bool>(p->second, true);
}
else if (p->first == "altitude-clamping")
{
if (!altitude) altitude = sc.getOrCreateSymbol<AltitudeSymbol>();
if (p->second == "none" ) altitude->clamping() = AltitudeSymbol::CLAMP_NONE;
else if (p->second == "terrain" ) altitude->clamping() = AltitudeSymbol::CLAMP_TO_TERRAIN;
else if (p->second == "relative") altitude->clamping() = AltitudeSymbol::CLAMP_RELATIVE_TO_TERRAIN;
}
else if (p->first == "altitude-offset")
{
if (!altitude) altitude = sc.getOrCreateSymbol<AltitudeSymbol>();
altitude->verticalOffset() = as<float>( p->second, 0.0f );
}
}
#if 0
if (line)
sc.addSymbol(line);
if (polygon)
sc.addSymbol(polygon);
if (point)
sc.addSymbol(point);
if (text)
sc.addSymbol(text);
if (extrusion)
sc.addSymbol(extrusion);
if (marker)
sc.addSymbol(marker);
if (altitude)
sc.addSymbol(altitude);
#endif
return true;
}
//
// NOTE: run this sample from the repo/tests directory.
//
int main(int argc, char** argv)
{
osg::ArgumentParser arguments(&argc,argv);
bool useRaster = arguments.read("--rasterize");
bool useOverlay = arguments.read("--overlay");
bool useStencil = arguments.read("--stencil");
bool useMem = arguments.read("--mem");
bool useLabels = arguments.read("--labels");
osgViewer::Viewer viewer(arguments);
// Start by creating the map:
Map* map = new Map();
// Start with a basemap imagery layer; we'll be using the GDAL driver
// to load a local GeoTIFF file:
GDALOptions basemapOpt;
basemapOpt.url() = "../data/world.tif";
map->addImageLayer( new ImageLayer( ImageLayerOptions("basemap", basemapOpt) ) );
// Next we add a feature layer. First configure a feature driver to
// load the vectors from a shapefile:
OGRFeatureOptions featureOpt;
if ( !useMem )
{
featureOpt.url() = "../data/usa.shp";
}
else
{
Ring* line = new Ring();
line->push_back( osg::Vec3d(-60, 20, 0) );
line->push_back( osg::Vec3d(-120, 20, 0) );
line->push_back( osg::Vec3d(-120, 60, 0) );
line->push_back( osg::Vec3d(-60, 60, 0) );
featureOpt.geometry() = line;
}
// Define a style for the feature data. Since we are going to render the
// vectors as lines, configure the line symbolizer:
Style style;
LineSymbol* ls = style.getOrCreateSymbol<LineSymbol>();
ls->stroke()->color() = osg::Vec4f( 1,1,0,1 ); // yellow
ls->stroke()->width() = 2.0f;
// Add some text labels.
if ( useLabels )
{
TextSymbol* text = style.getOrCreateSymbol<TextSymbol>();
text->provider() = "overlay";
text->content() = StringExpression( "[name]" );
text->priority() = NumericExpression( "[area]" );
text->removeDuplicateLabels() = true;
text->size() = 16.0f;
text->fill()->color() = Color::White;
text->halo()->color() = Color::DarkGray;
}
// That's it, the map is ready; now create a MapNode to render the Map:
MapNodeOptions mapNodeOptions;
mapNodeOptions.enableLighting() = false;
MapNode* mapNode = new MapNode( map, mapNodeOptions );
// Now we'll choose the AGG-Lite driver to render the features. By the way, the
// feature data is actually polygons, so we override that to treat it as lines.
// We apply the feature driver and set the style as well.
if (useStencil)
{
FeatureStencilModelOptions worldOpt;
worldOpt.featureOptions() = featureOpt;
worldOpt.geometryTypeOverride() = Geometry::TYPE_LINESTRING;
worldOpt.styles() = new StyleSheet();
worldOpt.styles()->addStyle( style );
worldOpt.enableLighting() = false;
worldOpt.depthTestEnabled() = false;
map->addModelLayer( new ModelLayer( "my features", worldOpt ) );
}
else if (useRaster)
{
AGGLiteOptions worldOpt;
worldOpt.featureOptions() = featureOpt;
worldOpt.geometryTypeOverride() = Geometry::TYPE_LINESTRING;
worldOpt.styles() = new StyleSheet();
worldOpt.styles()->addStyle( style );
map->addImageLayer( new ImageLayer( ImageLayerOptions("world", worldOpt) ) );
}
else //if (useGeom || useOverlay)
{
FeatureGeomModelOptions worldOpt;
worldOpt.featureOptions() = featureOpt;
worldOpt.geometryTypeOverride() = Geometry::TYPE_LINESTRING;
worldOpt.styles() = new StyleSheet();
worldOpt.styles()->addStyle( style );
worldOpt.enableLighting() = false;
worldOpt.depthTestEnabled() = false;
ModelLayerOptions options( "my features", worldOpt );
options.overlay() = useOverlay;
map->addModelLayer( new ModelLayer(options) );
}
viewer.setSceneData( mapNode );
viewer.setCameraManipulator( new EarthManipulator() );
if ( !useStencil && !useOverlay )
viewer.addEventHandler( new osgEarth::Util::AutoClipPlaneHandler );
// add some stock OSG handlers:
viewer.addEventHandler(new osgViewer::StatsHandler());
viewer.addEventHandler(new osgViewer::WindowSizeHandler());
viewer.addEventHandler(new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()));
return viewer.run();
}