1 package org.opentrafficsim.core.egtf;
2
3 /**
4 * Kernel with maximum range and shape.
5 * <p>
6 * Copyright (c) 2013-2019 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
7 * BSD-style license. See <a href="http://opentrafficsim.org/node/13">OpenTrafficSim License</a>.
8 * <p>
9 * @version $Revision$, $LastChangedDate$, by $Author$, initial version 24 okt. 2018 <br>
10 * @author <a href="http://www.transport.citg.tudelft.nl">Wouter Schakel</a>
11 */
12 public class Kernel
13 {
14
15 /** Maximum spatial range. */
16 private final double xMax;
17
18 /** Maximum temporal range. */
19 private final double tMax;
20
21 /** Shape of the kernel. */
22 private final KernelShape shape;
23
24 /**
25 * Constructor.
26 * @param xMax double; maximum spatial range
27 * @param tMax double; maximum temporal range
28 * @param shape KernelShape; shape of the kernel
29 */
30 Kernel(final double xMax, final double tMax, final KernelShape shape)
31 {
32 this.xMax = xMax;
33 this.tMax = tMax;
34 this.shape = shape;
35 }
36
37 /**
38 * Returns a weight assuming given propagation speed.
39 * @param c double; assumed propagation speed
40 * @param dx double; distance between measurement and estimated point
41 * @param dt double; time between measurement and estimated point
42 * @return double; weight assuming given propagation speed
43 */
44 final double weight(final double c, final double dx, final double dt)
45 {
46 return this.shape.weight(c, dx, dt);
47 }
48
49 /**
50 * Returns the from location of the valid data range.
51 * @param x double; location of estimated point
52 * @return double; from location of the valid data range
53 */
54 final double fromLocation(final double x)
55 {
56 return x - this.xMax;
57 }
58
59 /**
60 * Returns the to location of the valid data range.
61 * @param x double; location of estimated point
62 * @return double; to location of the valid data range
63 */
64 final double toLocation(final double x)
65 {
66 return x + this.xMax;
67 }
68
69 /**
70 * Returns the from time of the valid data range.
71 * @param t double; time of estimated point
72 * @return double; from time of the valid data range
73 */
74 final double fromTime(final double t)
75 {
76 return t - this.tMax;
77 }
78
79 /**
80 * Returns the to time of the valid data range.
81 * @param t double; time of estimated point
82 * @return double; to time of the valid data range
83 */
84 final double toTime(final double t)
85 {
86 return t + this.tMax;
87 }
88
89 /** {@inheritDoc} */
90 @Override
91 public String toString()
92 {
93 return "Kernel [tMax=" + this.tMax + ", xMax=" + this.xMax + ", shape=" + this.shape + "]";
94 }
95
96 }