Examples with ConvexHull2D org.apache.commons.math3.geometry.euclidean.twod.hull.ConvexHull2D used on opensource projects

Example 1 with ConvexHull2D

use of org.apache.commons.math3.geometry.euclidean.twod.hull.ConvexHull2D in project chordatlas by twak.

the class GISGen method importMesh.

private void importMesh(int index) {
    LoopL<Point3d> polies = blocks.get(index);
    List<Vector2D> verts = polies.stream().flatMap(ll -> ll.streamAble()).map(x -> {
        Line3d l = new Line3d(x.get(), x.getNext().get());
        l.move(perp(l.dir(), EXPAND_MESH));
        return new Vector2D(l.start.x, l.start.z);
    }).collect(Collectors.toList());
    double tol = 0.0001;
    ConvexHull2D chull = null;
    while (tol < 10) {
        try {
            chull = new MonotoneChain(false, tol).generate(verts);
            tol = 1000;
        } catch (ConvergenceException e) {
            tol *= 10;
        }
    }
    if (chull == null) {
        System.out.println("unable to find hull");
        return;
    }
    Loop<Point3d> hull = new Loop<Point3d>((Arrays.stream(chull.getLineSegments()).map(x -> new Point3d(x.getStart().getX(), 0, x.getStart().getY())).collect(Collectors.toList())));
    File root = new File(Tweed.SCRATCH + "meshes" + File.separator);
    int i = 0;
    File l;
    while ((l = new File(root, "" + i)).exists()) i++;
    l.mkdirs();
    File croppedFile = new File(l, CROPPED_OBJ);
    boolean found = false;
    for (Gen gen : tweed.frame.gens(MiniGen.class)) {
        // minigen == optimised obj
        ((MiniGen) gen).clip(hull, croppedFile);
        found = true;
    }
    if (!found)
        for (Gen gen : tweed.frame.gens(MeshGen.class)) {
            // obj == just import whole obj
            ObjGen objg = (ObjGen) gen;
            try {
                Files.asByteSource(objg.getFile()).copyTo(Files.asByteSink(croppedFile));
                objg.setVisible(false);
                found = true;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    if (found) {
        Graph2D g2 = new Graph2D();
        polies.stream().flatMap(ll -> ll.streamAble()).forEach(x -> g2.add(new Point2d(x.get().x, x.get().z), new Point2d(x.getNext().get().x, x.getNext().get().z)));
        g2.removeInnerEdges();
        // new Plot (true, g2 );
        UnionWalker uw = new UnionWalker();
        for (Point2d p : g2.map.keySet()) for (Line line : g2.map.get(p)) uw.addEdge(line.end, line.start);
        // new Plot (true, new ArrayList( uw.map.keySet()) );
        Loopz.writeXZObj(uw.findAll(), new File(l, "gis.obj"), true);
        Loopz.writeXZObj(Loopz.to2dLoop(polies, 1, null), new File(l, "gis_footprints.obj"), false);
        BlockGen bg = new BlockGen(l, tweed, polies);
        lastMesh.put(index, bg);
        tweed.frame.addGen(bg, true);
        tweed.frame.setSelected(bg);
    } else
        JOptionPane.showMessageDialog(tweed.frame(), "Failed to find mesh from minimesh or gml layers");
}