1 /* 2 * Copyright 2012 AndroidPlot.com 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 18 package com.androidplot; 19 20 /** 21 * A one dimensional region represented by a starting and ending value. 22 */ 23 public class LineRegion { 24 private Number minVal; 25 private Number maxVal; 26 27 public LineRegion(Number val1, Number v2) { 28 if (val1.doubleValue() < v2.doubleValue()) { 29 this.setMinVal(val1); 30 this.setMaxVal(v2); 31 } else { 32 this.setMinVal(v2); 33 this.setMaxVal(val1); 34 } 35 } 36 37 public static Number measure(Number val1, Number val2) { 38 return new LineRegion(val1, val2).length(); 39 } 40 41 public Number length() { 42 return maxVal.doubleValue() - minVal.doubleValue(); 43 } 44 45 /** 46 * Tests whether a value is within the given range 47 * @param value 48 * @return 49 */ 50 public boolean contains(Number value) { 51 return value.doubleValue() >= minVal.doubleValue() && value.doubleValue() <= maxVal.doubleValue(); 52 } 53 54 public boolean intersects(LineRegion lineRegion) { 55 return intersects(lineRegion.getMinVal(), lineRegion.getMaxVal()); 56 } 57 58 /** 59 * Tests whether this segment intersects another 60 * @param line2Min 61 * @param line2Max 62 * @return 63 */ 64 public boolean intersects(Number line2Min, Number line2Max) { 65 66 //double l1min = getMinVal() == null ? Double.NEGATIVE_INFINITY : getMinVal().doubleValue(); 67 //double l1max = getMaxVal() == null ? Double.POSITIVE_INFINITY : getMaxVal().doubleValue(); 68 69 //double l2min = line2Min == null ? Double.NEGATIVE_INFINITY : line2Min.doubleValue(); 70 //double l2max = line2Max == null ? Double.POSITIVE_INFINITY : line2Max.doubleValue(); 71 72 73 // is this line completely within line2? 74 if(line2Min.doubleValue() <= this.minVal.doubleValue() && line2Max.doubleValue() >= this.maxVal.doubleValue()) { 75 return true; 76 // is line1 partially within line2 77 } else return contains(line2Min) || contains(line2Max); 78 } 79 80 public Number getMinVal() { 81 return minVal; 82 } 83 84 public void setMinVal(Number minVal) { 85 if(minVal == null) { 86 throw new NullPointerException("Region values can never be null."); 87 } 88 this.minVal = minVal; 89 } 90 91 public Number getMaxVal() { 92 return maxVal; 93 } 94 95 public void setMaxVal(Number maxVal) { 96 if(maxVal == null) { 97 throw new NullPointerException("Region values can never be null."); 98 } 99 this.maxVal = maxVal; 100 } 101 } 102
