1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
601 double x4, double y4)
602 {
603 return ((relativeCCW(x1, y1, x2, y2, x3, y3) *
604 relativeCCW(x1, y1, x2, y2, x4, y4) <= 0)
605 && (relativeCCW(x3, y3, x4, y4, x1, y1) *
606 relativeCCW(x3, y3, x4, y4, x2, y2) <= 0));
607 }
608
609 /**
610 * Tests if the line segment from {@code (x1,y1)} to
611 * {@code (x2,y2)} intersects this line segment.
612 *
613 * @param x1 the X coordinate of the start point of the
614 * specified line segment
615 * @param y1 the Y coordinate of the start point of the
616 * specified line segment
617 * @param x2 the X coordinate of the end point of the
618 * specified line segment
619 * @param y2 the Y coordinate of the end point of the
620 * specified line segment
621 * @return {@code <true>} if this line segment and the specified line segment
622 * intersect each other; {@code false} otherwise.
623 * @since 1.2
624 */
625 public boolean intersectsLine(double x1, double y1, double x2, double y2) {
626 return linesIntersect(x1, y1, x2, y2,
627 getX1(), getY1(), getX2(), getY2());
628 }
629
630 /**
631 * Tests if the specified line segment intersects this line segment.
632 * @param l the specified {@code Line2D}
633 * @return {@code true} if this line segment and the specified line
634 * segment intersect each other;
635 * {@code false} otherwise.
636 * @since 1.2
637 */
638 public boolean intersectsLine(Line2D l) {
639 return linesIntersect(l.getX1(), l.getY1(), l.getX2(), l.getY2(),
640 getX1(), getY1(), getX2(), getY2());
641 }
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1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
601 double x4, double y4)
602 {
603 return ((relativeCCW(x1, y1, x2, y2, x3, y3) *
604 relativeCCW(x1, y1, x2, y2, x4, y4) <= 0)
605 && (relativeCCW(x3, y3, x4, y4, x1, y1) *
606 relativeCCW(x3, y3, x4, y4, x2, y2) <= 0));
607 }
608
609 /**
610 * Tests if the line segment from {@code (x1,y1)} to
611 * {@code (x2,y2)} intersects this line segment.
612 *
613 * @param x1 the X coordinate of the start point of the
614 * specified line segment
615 * @param y1 the Y coordinate of the start point of the
616 * specified line segment
617 * @param x2 the X coordinate of the end point of the
618 * specified line segment
619 * @param y2 the Y coordinate of the end point of the
620 * specified line segment
621 * @return {@code true} if this line segment and the specified line segment
622 * intersect each other; {@code false} otherwise.
623 * @since 1.2
624 */
625 public boolean intersectsLine(double x1, double y1, double x2, double y2) {
626 return linesIntersect(x1, y1, x2, y2,
627 getX1(), getY1(), getX2(), getY2());
628 }
629
630 /**
631 * Tests if the specified line segment intersects this line segment.
632 * @param l the specified {@code Line2D}
633 * @return {@code true} if this line segment and the specified line
634 * segment intersect each other;
635 * {@code false} otherwise.
636 * @since 1.2
637 */
638 public boolean intersectsLine(Line2D l) {
639 return linesIntersect(l.getX1(), l.getY1(), l.getX2(), l.getY2(),
640 getX1(), getY1(), getX2(), getY2());
641 }
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