Ejemplo n.º 1
0
  public static List<FaceMesh> createFaceMeshes(final TopoDS_Shape topoDS_Shape) {

    int meshIter = 3;
    TopExp_Explorer explorer = new TopExp_Explorer();
    TopLoc_Location loc = new TopLoc_Location();

    List<FaceMesh> faceMeshes = new ArrayList<FaceMesh>();

    for (explorer.init(topoDS_Shape, TopAbs_ShapeEnum.FACE); explorer.more(); explorer.next()) {
      TopoDS_Shape s = explorer.current();
      if (!(s instanceof TopoDS_Face)) continue; // should not happen!
      TopoDS_Face face = (TopoDS_Face) s;
      Poly_Triangulation pt = BRep_Tool.triangulation(face, loc);

      float error = 0.001f * getMaxBound(s) * 4;
      // float error=0.0001f;
      int iter = 0;
      while ((pt == null) & (iter < meshIter)) {
        new BRepMesh_IncrementalMesh(face, error, false);
        // new BRepMesh_IncrementalMesh(face,error, true);
        pt = BRep_Tool.triangulation(face, loc);
        error /= 10;
        iter++;
      }

      if (pt == null) {
        System.err.println(
            "Triangulation failed for face " + face + ". Trying other mesh parameters.");
        faceMeshes.add(new FaceMesh(new float[0], new int[0]));
        continue;
      }

      double[] dnodes = pt.nodes();
      final int[] itriangles = pt.triangles();
      if (face.orientation() == TopAbs_Orientation.REVERSED) {
        reverseMesh(itriangles);
      }

      final float[] fnodes = new float[dnodes.length];

      if (loc.isIdentity()) {
        for (int i = 0; i < dnodes.length; i++) {
          fnodes[i] = (float) dnodes[i];
        }
      } else transformMesh(loc, dnodes, fnodes);

      faceMeshes.add(new FaceMesh(fnodes, itriangles));
    }

    return faceMeshes;
  }
Ejemplo n.º 2
0
  public static void transformMesh(final TopLoc_Location loc, double[] src, float[] dst) {
    double[] matrix = new double[16];
    loc.transformation().getValues(matrix);

    Matrix4d m4d = new Matrix4d(matrix);
    Point3d p3d = new Point3d();

    for (int i = 0; i < src.length; i += 3) {
      p3d.x = src[i + 0];
      p3d.y = src[i + 1];
      p3d.z = src[i + 2];
      m4d.transform(p3d);
      dst[i + 0] = (float) p3d.x;
      dst[i + 1] = (float) p3d.y;
      dst[i + 2] = (float) p3d.z;
    }
  }