Hello everyone.
I am render geometry (lineString, polygon, point (of the library jts )) as
follows:
GeometryFactory geomFac = new GeometryFactory();
Coordinate[] polygonCoordinates = new Coordinate[3];
polygonCoordinates[0] = new Coordinate(10, 20);
polygonCoordinates[1] = new Coordinate(30,40);
polygonCoordinates[2] = new Coordinate(10,20);
LinearRing ring = geomFac.createLinearRing(polygonCoordinates);
Polygon polygon = geomFac.createPolygon(ring, null);
StyleFactory sFac = CommonFactoryFinder.getStyleFactory(
GeoTools.getDefaultHints() );
StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory(null);
org.geotools.styling.Style style = styleFactory.createStyle();
org.opengis.filter.FilterFactory factory =
CommonFactoryFinder.getFilterFactory(GeoTools.getDefaultHints());
PolygonSymbolizer polysym = sFac.createPolygonSymbolizer();
FilterFactory filterFactory = FilterFactoryFinder.createFilterFactory();
Stroke myStroke = sFac.getDefaultStroke();
myStroke.setColor(filterFactory.createLiteralExpression("#000000"));
myStroke.setWidth(filterFactory.createLiteralExpression(new Integer(1)));
polysym.setStroke(myStroke);
Rule ruleLine = sFac.createRule();
ruleLine.setSymbolizers(new Symbolizer[] { polysym });
FeatureTypeStyle fts = sFac.createFeatureTypeStyle();
fts.setRules(new Rule[] { ruleLine });
fts.setFeatureTypeName("circlefeature");
style.addFeatureTypeStyle(fts);
AttributeType[] typesNew = new AttributeType[1];
typesNew[0] = AttributeTypeFactory.newAttributeType("coolection",
curve2.getClass()
, false, 0, null, DefaultGeographicCRS.WGS84);
FeatureType polyType = FeatureTypes.newFeatureType(typesNew,
"circlefeature");
Feature polyFeature = polyType.create(new Object[] { curve2});
FeatureCollection featureCollectionLine =
FeatureCollections.newCollection();
featureCollectionLine.add(polyFeature);
CoordinateReferenceSystem crs = DefaultGeographicCRS.WGS84;
MapContext context = new DefaultMapContext(crs);
MapLayer layer = new DefaultMapLayer(featureCollectionLine,style);
context.addLayer(context.getLayerCount(),layer);
context.setAreaOfInterest(layer.getBounds());
GTRenderer renderer;
if( true ){
renderer = new StreamingRenderer();
HashMap hints = new HashMap();
hints.put("memoryPreloadingEnabled", Boolean.TRUE);
renderer.setRendererHints( hints );
}
else {
renderer = new StreamingRenderer();
HashMap hints = new HashMap();
hints.put("memoryPreloadingEnabled", Boolean.FALSE);
renderer.setRendererHints( hints );
}
renderer.setContext(context);
mp.setRenderer(renderer);
mp.setContext(context);
mp.setMapArea(layer.getBounds());
frame.repaint();
frame.doLayout();
Cuestion:
this is my example to render linestring, polygon, circle...
but i have to render arc (calcula arc 3 coordinate: center, point1 ,
point2).
help,
Could anyone please give me some pointers?
Thank you,
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