bundles/org.simantics.g2d/src/org/simantics/g2d/multileveldiagram/TransitionFunction.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.g2d.multileveldiagram;\r
  13 \r
  14 import org.simantics.g2d.element.handler.impl.TransitionFunctionPainter;\r
  15 \r
  16 /**\r
  17  * Transition function \r
  18  * - Bijective function \r
  19  * \r
  20  * @See {@link TransitionFunctionPainter}\r
  21  * @author Toni Kalajainen\r
  22  */\r
  23 public interface TransitionFunction {\r
  24         \r
  25         public static final TransitionFunction LINEAR = \r
  26                 new TransitionFunction() {\r
  27                         @Override\r
  28                         public double f(double p) {\r
  29                                 return p;\r
  30                         }};\r
  31         public static final TransitionFunction SIGMOID = \r
  32                 new TransitionFunction() {\r
  33                         @Override\r
  34                         public double f(double p) {\r
  35                                 return 1 / (1+ Math.exp(6-p*12));\r
  36                         }};\r
  37         \r
  38         /**\r
  39          * Calculates transition value\r
  40          * @param p 0..1\r
  41          * @return 0..1\r
  42          */\r
  43         double f(double p);\r
  44 \r
  45 }\r