1 /*
   2  * Copyright (c) 2011, 2015, Oracle and/or its affiliates.
   3  * All rights reserved. Use is subject to license terms.
   4  *
   5  * This file is available and licensed under the following license:
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  *  - Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *  - Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the distribution.
  16  *  - Neither the name of Oracle Corporation nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32 
  33 package com.javafx.experiments.utils3d.animation;
  34 
  35 import javafx.util.Duration;
  36 
  37 public class TickCalculation {
  38     public static final int TICKS_PER_SECOND = 6000;
  39     private static final double TICKS_PER_MILI = TICKS_PER_SECOND / 1000.0;
  40     private static final double TICKS_PER_NANO =  TICKS_PER_MILI * 1e-6;
  41 
  42     private TickCalculation() {}
  43 
  44     public static long add(long op1, long op2) {
  45         assert (op1 >= 0);
  46 
  47         if (op1 == Long.MAX_VALUE || op2 == Long.MAX_VALUE) {
  48             return Long.MAX_VALUE;
  49         } else if (op2 == Long.MIN_VALUE) {
  50             return 0;
  51         }
  52 
  53         if (op2 >= 0) {
  54             final long result = op1 + op2;
  55             return (result < 0)? Long.MAX_VALUE : result;
  56         } else {
  57             return Math.max(0, op1 + op2);
  58         }
  59 
  60     }
  61 
  62     public static long sub(long op1, long op2) {
  63         assert (op1 >= 0);
  64 
  65         if (op1 == Long.MAX_VALUE || op2 == Long.MIN_VALUE) {
  66             return Long.MAX_VALUE;
  67         } else if (op2 == Long.MAX_VALUE) {
  68             return 0;
  69         }
  70 
  71         if (op2 >= 0) {
  72             return Math.max(0, op1 - op2);
  73         } else {
  74             final long result = op1 - op2;
  75             return result < 0 ? Long.MAX_VALUE : result;
  76         }
  77 
  78     }
  79 
  80     public static long fromMillis(double millis) {
  81         return Math.round(TICKS_PER_MILI * millis);
  82     }
  83 
  84     public static long fromNano(long nano) {
  85         return Math.round(TICKS_PER_NANO * nano);
  86     }
  87 
  88     public static long fromDuration(Duration duration) {
  89         return fromMillis(duration.toMillis());
  90     }
  91 
  92     public static long fromDuration(Duration duration, double rate) {
  93         return Math.round(TICKS_PER_MILI * duration.toMillis() / Math.abs(rate));
  94     }
  95 
  96     public static Duration toDuration(long ticks) {
  97         return Duration.millis(toMillis(ticks));
  98     }
  99 
 100     public static double toMillis(long ticks) {
 101         return ticks / TICKS_PER_MILI;
 102     }
 103 
 104 
 105 }