1 /*
2 * Licensed to the Hipparchus project under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The Hipparchus project licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.hipparchus.samples.complex;
19
20 import org.hipparchus.complex.Complex;
21 import org.hipparchus.util.FastMath;
22
23 /** Classical method for domain coloring.
24 * <p>
25 * Value represents module.
26 * </p>
27 */
28 public class ContinuousModuleValue extends DomainColoring {
29
30 /** Simple constructor.
31 * @param saturation constant saturation
32 */
33 protected ContinuousModuleValue(final double saturation) {
34 super(saturation);
35 }
36
37 /** {@inheritDoc} */
38 @Override
39 public double value(final Complex z) {
40 final double module = z.norm();
41 return FastMath.pow(1.0 - 1.0 / (1.0 + module * module), 0.2);
42 }
43
44 }