b174f65122
add GeomBuilder, needs Jts drawing_api: squashed drawing_api: use JtsDrawable baseclass - add makeCircle for testing drawing_api: cleanups drawing_api: refactor drawing_api: use SpatialIndex drawing_api: optimization + cleanup drawing_api: VectorLayer - use VectorLayer for PathLayer drawing_api: make style builder more consistent with theme api drawing_api: wip
105 lines
2.5 KiB
Java
105 lines
2.5 KiB
Java
package org.oscim.layers;
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import org.jeo.geom.CoordinatePath;
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import org.oscim.core.Box;
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import org.oscim.core.GeometryBuffer;
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import org.oscim.core.MapPosition;
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import org.oscim.core.MercatorProjection;
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import org.oscim.core.Tile;
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import org.oscim.layers.vector.AbstractVectorLayer;
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import org.oscim.map.Map;
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import org.oscim.renderer.bucket.LineBucket;
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import org.oscim.renderer.bucket.MeshBucket;
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import org.oscim.utils.geom.SimplifyDP;
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import org.oscim.utils.geom.SimplifyVW;
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import com.vividsolutions.jts.geom.Coordinate;
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import com.vividsolutions.jts.geom.Envelope;
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import com.vividsolutions.jts.geom.Geometry;
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public abstract class JtsLayer extends AbstractVectorLayer<Geometry> {
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private double mMinX;
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private double mMinY;
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public JtsLayer(Map map) {
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super(map);
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}
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@Override
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protected void processFeatures(Task t, Box bbox) {
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processFeatures(t, new Envelope(bbox.xmin, bbox.ymin, bbox.xmax, bbox.ymax));
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}
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protected abstract void processFeatures(Task t, Envelope e);
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protected int transformPath(MapPosition pos, GeometryBuffer g, CoordinatePath path) {
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double scale = pos.scale * Tile.SIZE / UNSCALE_COORD;
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int cnt = 0;
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O: while (path.hasNext()) {
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Coordinate c = path.next();
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float x = (float) ((MercatorProjection.longitudeToX(c.x) - pos.x) * scale);
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float y = (float) ((MercatorProjection.latitudeToY(c.y) - pos.y) * scale);
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switch (path.getStep()) {
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case MOVE_TO:
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if (g.isPoly())
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g.startPolygon();
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else if (g.isLine())
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g.startLine();
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cnt++;
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g.addPoint(x, y);
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break;
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case LINE_TO:
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cnt++;
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g.addPoint(x, y);
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break;
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case CLOSE:
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//g.addPoint(x, y);
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//if (g.type == GeometryType.POLY)
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break;
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case STOP:
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break O;
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}
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}
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return cnt;
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}
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SimplifyDP mSimpDP = new SimplifyDP();
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SimplifyVW mSimpVW = new SimplifyVW();
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protected void addPolygon(Task t, Geometry g, MeshBucket ml, LineBucket ll) {
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mGeom.clear();
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mGeom.startPolygon();
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CoordinatePath p = CoordinatePath.create(g);
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if (mMinX > 0 || mMinY > 0)
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p.generalize(mMinX, mMinY);
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if (transformPath(t.position, mGeom, p) < 3)
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return;
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if (!mClipper.clip(mGeom))
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return;
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mSimpVW.simplify(mGeom, 0.1f);
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mSimpDP.simplify(mGeom, 0.5f);
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ll.addLine(mGeom);
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ml.addMesh(mGeom);
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}
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protected void addLine(Task t, Geometry g, LineBucket ll) {
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mGeom.clear();
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mGeom.startLine();
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CoordinatePath p = CoordinatePath.create(g);
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transformPath(t.position, mGeom, p);
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ll.addLine(mGeom);
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}
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}
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