1 package org.opentrafficsim.draw.egtf;
2
3 /**
4 * Kernel with maximum range and shape.
5 * <p>
6 * Copyright (c) 2013-2024 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
7 * BSD-style license. See <a href="https://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
8 * </p>
9 * @author <a href="https://github.com/wjschakel">Wouter Schakel</a>
10 */
11 public class Kernel
12 {
13
14 /** Maximum spatial range. */
15 private final double xMax;
16
17 /** Maximum temporal range. */
18 private final double tMax;
19
20 /** Shape of the kernel. */
21 private final KernelShape shape;
22
23 /**
24 * Constructor.
25 * @param xMax double; maximum spatial range
26 * @param tMax double; maximum temporal range
27 * @param shape KernelShape; shape of the kernel
28 */
29 Kernel(final double xMax, final double tMax, final KernelShape shape)
30 {
31 this.xMax = xMax;
32 this.tMax = tMax;
33 this.shape = shape;
34 }
35
36 /**
37 * Returns a weight assuming given propagation speed.
38 * @param c double; assumed propagation speed
39 * @param dx double; distance between measurement and estimated point
40 * @param dt double; time between measurement and estimated point
41 * @return double; weight assuming given propagation speed
42 */
43 final double weight(final double c, final double dx, final double dt)
44 {
45 return this.shape.weight(c, dx, dt);
46 }
47
48 /**
49 * Returns the from location of the valid data range.
50 * @param x double; location of estimated point
51 * @return double; from location of the valid data range
52 */
53 final double fromLocation(final double x)
54 {
55 return x - this.xMax;
56 }
57
58 /**
59 * Returns the to location of the valid data range.
60 * @param x double; location of estimated point
61 * @return double; to location of the valid data range
62 */
63 final double toLocation(final double x)
64 {
65 return x + this.xMax;
66 }
67
68 /**
69 * Returns the from time of the valid data range.
70 * @param t double; time of estimated point
71 * @return double; from time of the valid data range
72 */
73 final double fromTime(final double t)
74 {
75 return t - this.tMax;
76 }
77
78 /**
79 * Returns the to time of the valid data range.
80 * @param t double; time of estimated point
81 * @return double; to time of the valid data range
82 */
83 final double toTime(final double t)
84 {
85 return t + this.tMax;
86 }
87
88 /** {@inheritDoc} */
89 @Override
90 public String toString()
91 {
92 return "Kernel [tMax=" + this.tMax + ", xMax=" + this.xMax + ", shape=" + this.shape + "]";
93 }
94
95 }