dive4elements/gnv-client: gnv-artifacts/src/main/java/de/intevation/gnv/utils/IndexBuffer.java annotate

annotate gnv-artifacts/src/main/java/de/intevation/gnv/utils/IndexBuffer.java @ 729:d23ad22bcfe7

Integrated lookup of the Geometry which was put to the Artifact during the Instantiation gnv-artifacts/trunk@767 c6561f87-3c4e-4783-a992-168aeb5c3f6f

author	Tim Englich <tim.englich@intevation.de>
date	Mon, 15 Mar 2010 09:23:56 +0000
parents	555483213f78
children	b1f5f2a8840f

rev	line source
349 555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	1 package de.intevation.gnv.utils;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	2
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	3 import java.awt.geom.Point2D;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	4
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	5 import java.awt.Point;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	6
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	7 import java.util.List;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	8
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	9 /**
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	10 * Create buffers around integer pairs (i_1..n), j_1..n).
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	11 *
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	12 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	13 */
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	14 public class IndexBuffer
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	15 {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	16 public static final double EPSILON = 1e-6d;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	17 public static final double OFFSET = 1.0d;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	18
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	19 public static final String I_COLUMN = "IPOSITION";
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	20 public static final String J_COLUMN = "JPOSITION";
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	21
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	22 public static final class Segment {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	23
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	24 private Segment next;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	25
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	26 private Point2D.Double n;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	27 private double d1;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	28 private double d2;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	29
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	30 private int iMin;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	31 private int iMax;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	32
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	33 private int jMin;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	34 private int jMax;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	35
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	36 public Segment(Point a, Point b, Segment next) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	37
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	38 this.next = next;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	39
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	40 iMin = Math.min(a.x, b.x)-1;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	41 iMax = Math.max(a.x, b.x)+1;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	42
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	43 jMin = Math.min(a.y, b.y)-1;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	44 jMax = Math.max(a.y, b.y)+1;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	45
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	46 if (a.x > b.x) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	47 Point p = a; a = b; b = p;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	48 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	49
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	50 Point2D.Double p1, p2, p3;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	51
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	52 if (a.y < b.y) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	53 p1 = new Point2D.Double(a.x - OFFSET, a.y + 1 + OFFSET);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	54 p2 = new Point2D.Double(b.x - OFFSET, b.y + 1 + OFFSET);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	55 p3 = new Point2D.Double(a.x + 1 + OFFSET, a.y - OFFSET);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	56 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	57 else {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	58 p1 = new Point2D.Double(a.x + 1 + OFFSET, a.y + 1 + OFFSET);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	59 p2 = new Point2D.Double(b.x + 1 + OFFSET, b.y + 1 + OFFSET);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	60 p3 = new Point2D.Double(b.x - OFFSET, b.y - OFFSET);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	61 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	62
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	63 n = normalize(orthogonal(sub(p1, p2)));
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	64
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	65 d1 = dot(n, p1);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	66 d2 = dot(n, p3);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	67
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	68 if (d1 > d2) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	69 double d = d1;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	70 d1 = d2;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	71 d2 = d;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	72 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	73 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	74
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	75 public boolean check(int i, int j) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	76 if (i < iMin \|\| i > iMax \|\| j < jMin \|\| j > jMax) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	77 return false;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	78 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	79 double v = dot(n, i, j);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	80 return v >= d1 && v <= d2;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	81 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	82
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	83 public void toWhereClause(StringBuilder sb, String iColumn, String jColumn) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	84 sb.append('(')
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	85 .append(iColumn).append(" >= ").append(iMin).append(" AND ")
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	86 .append(iColumn).append(" <= ").append(iMax).append(" AND ")
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	87 .append(jColumn).append(" >= ").append(jMin).append(" AND ")
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	88 .append(jColumn).append(" <= ").append(jMax).append(" AND (")
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	89 .append(n.x).append('*').append(iColumn).append(" + ")
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	90 .append(n.y).append('*').append(jColumn)
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	91 .append(") BETWEEN ").append(d1).append(" AND ").append(d2).append(')');
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	92 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	93 } // class Segment
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	94
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	95 protected Segment head;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	96
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	97 protected String iColumn;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	98 protected String jColumn;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	99
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	100 public IndexBuffer(List<? extends Point> points) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	101 this(points, I_COLUMN, J_COLUMN);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	102 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	103
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	104 public IndexBuffer(List<? extends Point> points, String iColumn, String jColumn) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	105 this.iColumn = iColumn;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	106 this.jColumn = jColumn;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	107
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	108 for (int i = 1, N = points.size(); i < N; ++i) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	109 Point p1 = (Point)points.get(i-1);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	110 Point p2 = (Point)points.get(i);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	111 head = new Segment(p1, p2, head);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	112 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	113 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	114
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	115 public boolean check(int i, int j) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	116
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	117 Segment current = head;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	118 while (current != null) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	119 if (current.check(i, j)) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	120 return true;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	121 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	122 current = current.next;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	123 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	124 return false;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	125 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	126
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	127 public String toWhereClause() {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	128
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	129 StringBuilder sb = new StringBuilder();
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	130
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	131 Segment current = head;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	132
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	133 while (current != null) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	134 if (current != head) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	135 sb.append(" OR ");
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	136 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	137 current.toWhereClause(sb, iColumn, jColumn);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	138 current = current.next;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	139 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	140
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	141 return sb.toString();
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	142 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	143
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	144 public static Point2D.Double sub(Point2D.Double p1, Point2D.Double p2) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	145 return new Point2D.Double(p1.x - p2.x, p1.y - p2.y);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	146 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	147
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	148 public static final double dot(Point2D.Double p1, Point2D.Double p2) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	149 return p1.xp2.x + p1.yp2.y;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	150 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	151
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	152 public static final double dot(Point2D.Double p1, double x, double y) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	153 return p1.xx + p1.yy;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	154 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	155
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	156 public static final Point2D.Double scale(Point2D.Double p, double s) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	157 return new Point2D.Double(sp.x, sp.y);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	158 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	159
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	160 public static final Point2D.Double normalize(Point2D.Double p) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	161 double len2 = Math.sqrt(dot(p, p));
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	162 return len2 > EPSILON ? scale(p, 1d/len2) : p;
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	163 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	164
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	165 public static final Point2D.Double orthogonal(Point2D.Double p) {
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	166 return new Point2D.Double(p.y, -p.x);
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	167 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	168 }
555483213f78 Added buffer creator in index (i, j) space. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	169 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:

Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/utils/IndexBuffer.java @ 729:d23ad22bcfe7