Examples with Material org.twak.utils.geom.ObjDump.Material used on opensource projects

Example 1 with Material

use of org.twak.utils.geom.ObjDump.Material in project chordatlas by twak.

the class MiniTransform method convertToMini.

public static void convertToMini(Iterable<File> bigObj, File outfile, Matrix4d transform) {
    outfile.mkdirs();
    // .iterator().next() );
    ObjDump src = new ObjDump(bigObj);
    src.centerVerts();
    src.transform(transform);
    long count = src.material2Face.entrySet().stream().mapToInt(x -> x.getValue().size()).sum();
    double[] bounds = src.orderVert.stream().collect(new InaxPoint3dCollector());
    long targetCount = 5000;
    double volume = (bounds[1] - bounds[0]) * (bounds[3] - bounds[2]) * (bounds[5] - bounds[4]);
    double edgeLength = Math.pow(volume / (count / targetCount), 0.3333);
    int xc = (int) Math.ceil((bounds[1] - bounds[0]) / edgeLength), yc = (int) Math.ceil((bounds[3] - bounds[2]) / edgeLength), zc = (int) Math.ceil((bounds[5] - bounds[4]) / edgeLength);
    Set<Face>[][][] faces = new Set[xc][yc][zc];
    for (Entry<Material, List<Face>> e : src.material2Face.entrySet()) for (Face f : e.getValue()) {
        Tuple3d vt = src.orderVert.get(f.vtIndexes.get(0));
        int ix = (int) ((vt.x - bounds[0]) / edgeLength);
        int iy = (int) ((vt.y - bounds[2]) / edgeLength);
        int iz = (int) ((vt.z - bounds[4]) / edgeLength);
        if (faces[ix][iy][iz] == null)
            faces[ix][iy][iz] = new HashSet();
        faces[ix][iy][iz].add(f);
    }
    int dir = 0;
    MiniTransform mt = new MiniTransform();
    for (int x = 0; x < xc; x++) for (int y = 0; y < yc; y++) for (int z = 0; z < zc; z++) {
        Set<Face> miniF = faces[x][y][z];
        if (miniF == null)
            continue;
        Matrix4d trans = new Matrix4d();
        trans.setIdentity();
        trans.setScale(edgeLength / 255);
        trans.setTranslation(new Vector3d(x * edgeLength + bounds[0], y * edgeLength + bounds[2], z * edgeLength + bounds[4]));
        Matrix4d pack = new Matrix4d(trans);
        pack.invert();
        ObjDump mini = new ObjDump();
        miniF.stream().forEach(f -> mini.addFaceFrom(f, src));
        mini.transform(pack);
        mini.dump(new File(new File(outfile, "" + dir), OBJ));
        mt.index.put(dir, trans);
        dir++;
    }
    try {
        new XStream().toXML(mt, new FileWriter(new File(outfile, INDEX)));
    } catch (IOException e1) {
        e1.printStackTrace();
    }
    System.out.println("wrote " + count + " faces to " + dir + " meshes");
}