1   /* Copyright 2002-2025 CS GROUP
2    * Licensed to CS GROUP (CS) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * CS 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    *   http://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  package org.orekit.propagation.events;
18  
19  import org.orekit.propagation.SpacecraftState;
20  
21  /** This interface represents an event enabling predicate function.
22   * @author Luc Maisonobe
23   * @since 7.1
24   */
25  public interface EnablingPredicate {
26  
27      /** Compute an event enabling function of state.
28       * @param state current state
29       * @param detector underlying detector
30       * @param g value of the underlying detector for the current state
31       * @return true if the event is enabled (i.e. it can be
32       * triggered), false if it should be ignored
33       */
34      boolean eventIsEnabled(SpacecraftState state, EventDetector detector, double g);
35  
36  }