Exemplo n.º 1
0
          public Value eval(RCvalue args) throws EvalException {
            if ((args.size() < 0) || (3 < args.size()))
              throw new EvalException("usage: reduce(polygon, [errtol,[edgeReducible] ] ])");
            if (!(args.value(0) instanceof PolygonValue))
              throw new EvalException("reduce: first operand must be a polygon");

            double errtol = defaultErrtol;
            if (args.size() >= 2) { // get error tolerance
              if (!(args.value(1) instanceof DoubleValue))
                throw new EvalException("reduce: second operand must be an integer");
              errtol = ((DoubleValue) (args.value(1))).value();
            }
            boolean edgeReducible = true;
            if (args.size() >= 3) {
              double temp = ((DoubleValue) (args.value(2))).value();
              edgeReducible = (temp > 0); // temp = 1, edge reducible, otherwise, not
            }

            Polygon.EndCondition ec = new Polygon.CostEndCondition(errtol);
            if (errtol >= 3) {
              int maxV = (int) Math.round(errtol);
              ec = new Polygon.DegreeEndCondition(maxV);
            }
            PolygonValue p = (PolygonValue) (args.value(0));
            Polygon poly = p.polygon();
            if (poly instanceof ConvexPolygon) { // NOTE: connection for reduce
              if (edgeReducible) return new PolygonValue(((ConvexPolygon) poly).reduce(ec));
              else return p; // can't reduce because convex polygon can only reduce edge
            } else {
              return new PolygonValue(poly.reduce(ec, true, edgeReducible));
            }
          }
Exemplo n.º 2
0
 public Value eval(RCvalue args) throws EvalException {
   if (args.size() != 1) throw new EvalException("usage: hull(polygon)");
   if (!(args.value(0) instanceof PolygonValue))
     throw new EvalException("hull: argument must be a polygon");
   PolygonValue pv = (PolygonValue) (args.value(0));
   Polygon poly = pv.polygon();
   return new PolygonValue(poly.convexHull()); // NOTE: connection for convex hull
 }
Exemplo n.º 3
0
 public Value eval(RCvalue args) throws EvalException {
   Polygon[] polys = new Polygon[args.size() - 1];
   for (int i = 0; i < args.size() - 1; i++) {
     PolygonValue pv = (PolygonValue) args.value(i);
     polys[i] = pv.polygon();
   }
   PolygonValue pv = (PolygonValue) args.value(args.size() - 1); // the last polygon
   return new PolygonValue(pv.polygon().union(polys));
 }
Exemplo n.º 4
0
 protected static Value grind(RCvalue args, Operation op) throws EvalException {
   for (int i = 0; i < args.size(); i++)
     if (!(args.value(i) instanceof PolygonValue))
       throw new EvalException(
           op.name() + "(): all operands must polgons." + "Operand " + (i + 1) + "is not.");
   return (grind(args, op, 0, args.size()));
 }
Exemplo n.º 5
0
 // value(lo) to value(hi-1)
 protected static Value grind(RCvalue args, Operation op, int lo, int hi) throws EvalException {
   switch (hi - lo) {
     case 0:
       return new PolygonValue(
           (RCvalue) (RCvalue.factory().create(new Value[] {}, true))); // empty
     case 1:
       return args.value(lo); // one
     case 2:
       Value result = op.op((PolygonValue) (args.value(lo)), (PolygonValue) (args.value(hi - 1)));
       return result; // two
     default:
       int mid = (lo + hi + 1) / 2; // split
       Value v0 = grind(args, op, lo, mid);
       Value v1 = grind(args, op, mid, hi);
       result = op.op((PolygonValue) (v0), (PolygonValue) (v1));
       return result;
   }
 }
Exemplo n.º 6
0
 public Value eval(RCvalue args) throws EvalException {
   if (args.size() != 2) throw new EvalException("usage: reduce(polygon, errtol])");
   PolygonValue pv1 = (PolygonValue) args.value(0);
   PolygonValue pv2 = (PolygonValue) args.value(1);
   boolean isContain = pv1.polygon().contains(pv2.polygon());
   double contain = 0;
   if (isContain) {
     contain = 1; // we don't have a boolean factory now.
   }
   return ValueFactory.create(contain);
 }
Exemplo n.º 7
0
 /**
  * Create a polygon from a RCvalue(matrix) NOTE: the connection from matlab to java TODO: what if
  * there are less than 3 points
  */
 protected PolygonValue(RCvalue u) throws EvalException { // NOTE: matlab to java
   Point[] points;
   if (u.isRow()) {
     // each column should have two double values
     points = new Point[u.size()];
     for (int i = 0; i < u.size(); i++) {
       Value v = u.value(i);
       if (!(v instanceof RCvalue)) rc_bad();
       RCvalue c = (RCvalue) v;
       if (c.size() != 2) rc_bad();
       Value x = c.value(0), y = c.value(1);
       if (!(x instanceof DoubleValue) || !(y instanceof DoubleValue)) rc_bad();
       points[i] = Point.create(((DoubleValue) x).value(), ((DoubleValue) y).value());
     }
   } else {
     if (!(u.value(0) instanceof RCvalue) || !(u.value(1) instanceof RCvalue)) rc_bad();
     RCvalue xMatrix = (RCvalue) (u.value(0)), yMatrix = (RCvalue) u.value(1);
     if (xMatrix.size() != yMatrix.size()) rc_bad();
     points = new Point[xMatrix.size()];
     for (int i = 0; i < xMatrix.size(); i++) {
       Value x = xMatrix.value(i), y = yMatrix.value(i);
       if (!(x instanceof DoubleValue) || !(y instanceof DoubleValue)) rc_bad();
       points[i] = Point.create(((DoubleValue) x).value(), ((DoubleValue) y).value());
     }
   }
   poly = new SimplePolygon(points);
   if (ConvexPolygon.isConvex(
       (SimplePolygon) poly)) // create convexPolygon if it is, simplify the computation later
     // BUGS, SimplePolygon removes duplicated points. Therefore, it is incorrect to construct a
     // convex polygon
     // using points and do not check. We should use the points from poly.
     // poly = new ConvexPolygon(points,false);
     poly = new ConvexPolygon(poly.points(), false);
   if (poly.degree() == u.size()) // SimplePolygon may remove redundant points
   rc = u;
   else rc = null;
 }
Exemplo n.º 8
0
 public Value eval(RCvalue args) throws EvalException {
   if (args.size() != 2) throw new EvalException("usage: intersect(poly1,poly2)");
   Polygon p1 = ((PolygonValue) args.value(0)).polygon();
   Polygon p2 = ((PolygonValue) args.value(1)).polygon();
   return new PolygonValue(p1.intersect(p2));
 }
Exemplo n.º 9
0
 public Value eval(RCvalue args) throws EvalException {
   if (args.size() != 1) throw new EvalException("usage: polygon(row/col)");
   if (!(args.value(0) instanceof RCvalue))
     throw new EvalException("polygon: argument must be a row/col");
   return new PolygonValue((RCvalue) (args.value(0)));
 }