1 package org.opentrafficsim.road.gtu.lane.tactical.following;
2
3 import org.djunits.value.vdouble.scalar.Acceleration;
4 import org.djunits.value.vdouble.scalar.Time;
5
6 /**
7 * Container for two instances of an AccelerationStep. One for the GTU that is deciding its move (the leader); one for the GTU
8 * that will/would be the (new) follower of that GTU.
9 * <p>
10 * Copyright (c) 2013-2015 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
11 * BSD-style license. See <a href="http://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
12 * <p>
13 * @version $Revision: 1368 $, $LastChangedDate: 2015-09-02 00:20:20 +0200 (Wed, 02 Sep 2015) $, by $Author: averbraeck $,
14 * initial version 11 mrt. 2015 <br>
15 * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
16 */
17 public class DualAccelerationStep
18 {
19 /** AccelerationStep for the leader. */
20 private final AccelerationStep leaderAccelerationStep;
21
22 /** AccelerationStep for the (new) follower. */
23 private final AccelerationStep followerAccelerationStep;
24
25 /**
26 * Create a new DualAccelerationStep.
27 * @param leaderAccelerationStep AccelerationStep; the acceleration and time step size for the leader
28 * @param followerAccelerationStep AccelerationStep; the acceleration and time step size for the (new) follower
29 */
30 public DualAccelerationStep(final AccelerationStep leaderAccelerationStep,
31 final AccelerationStep followerAccelerationStep)
32 {
33 this.leaderAccelerationStep = leaderAccelerationStep;
34 this.followerAccelerationStep = followerAccelerationStep;
35 }
36
37 /**
38 * Retrieve the AccelerationStep for the leader GTU.
39 * @return AccelerationStep; the acceleration and time step size for the leader
40 */
41 public final AccelerationStep getLeaderAccelerationStep()
42 {
43 return this.leaderAccelerationStep;
44 }
45
46 /**
47 * Retrieve the AccelerationStep for the (new) follower GTU.
48 * @return AccelerationStep; the acceleration and time step size for the (new) follower
49 */
50 public final AccelerationStep getFollowerAccelerationStep()
51 {
52 return this.followerAccelerationStep;
53 }
54
55 /**
56 * Return the acceleration of the leader.
57 * @return DoubleScalar<AccelerationUnit>; the acceleration of the leader
58 */
59 public final Acceleration getLeaderAcceleration()
60 {
61 return getLeaderAccelerationStep().getAcceleration();
62 }
63
64 /**
65 * Return the acceleration of the follower.
66 * @return DoubleScalar<AccelerationUnit>; the acceleration of the follower
67 */
68 public final Acceleration getFollowerAcceleration()
69 {
70 return getFollowerAccelerationStep().getAcceleration();
71 }
72
73 /**
74 * Return the time up to which the result of the leader is valid.
75 * @return DoubleScalar<TimeUnit>; the time up to which the result of the leader is valid
76 */
77 public final Time.Abs getLeaderValidUntil()
78 {
79 return getLeaderAccelerationStep().getValidUntil();
80 }
81
82 /**
83 * Return the time up to which the result of the follower is valid.
84 * @return DoubleScalar<TimeUnit>; the time up to which the result of the follower is valid
85 */
86 public final Time.Abs getFollowerValidUntil()
87 {
88 return getFollowerAccelerationStep().getValidUntil();
89 }
90
91 /** {@inheritDoc} */
92 public final String toString()
93 {
94 return "Follower: " + getFollowerAccelerationStep() + ", Leader: " + getLeaderAccelerationStep();
95 }
96
97 }