Mercurial > dive4elements > river
comparison flys-client/src/main/java/de/intevation/flys/client/shared/Transform2D.java @ 535:017371801479
Added a chart info service to fetch the info document for a specific chart from artifact server.
flys-client/trunk@2033 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Wed, 01 Jun 2011 08:15:58 +0000 |
| parents | |
| children | ea2191b1299d |
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| 534:e08777967bad | 535:017371801479 |
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| 1 package de.intevation.flys.client.shared; | |
| 2 | |
| 3 import java.io.Serializable; | |
| 4 | |
| 5 | |
| 6 /** | |
| 7 * This object supports a linear transformation to transform xy coordinates into | |
| 8 * an other coordinate system based on scale and translation values. | |
| 9 * | |
| 10 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 11 */ | |
| 12 public class Transform2D implements Serializable { | |
| 13 | |
| 14 protected double sx; | |
| 15 protected double sy; | |
| 16 | |
| 17 protected double tx; | |
| 18 protected double ty; | |
| 19 | |
| 20 | |
| 21 public Transform2D() { | |
| 22 } | |
| 23 | |
| 24 | |
| 25 /** | |
| 26 * Creates a new transformation with scale and translation factors. | |
| 27 * | |
| 28 * @param sx The scale factor for the x axis. | |
| 29 * @param sy The scale factor for the y axis. | |
| 30 * @param tx The translation factor for the x axis. | |
| 31 * @param ty The translation factor for the y axis. | |
| 32 */ | |
| 33 public Transform2D(double sx, double sy, double tx, double ty) { | |
| 34 this.sx = sx; | |
| 35 this.sy = sy; | |
| 36 this.tx = tx; | |
| 37 this.ty = ty; | |
| 38 } | |
| 39 | |
| 40 | |
| 41 /** | |
| 42 * Transforms the pixel x and y into a new coordinate system based on the | |
| 43 * scale and translation values specified in the constructor. | |
| 44 */ | |
| 45 public double[] transform(double x, double y) { | |
| 46 double resX = sx * x + tx; | |
| 47 double resY = sy * y + ty; | |
| 48 | |
| 49 return new double[] { resX, resY }; | |
| 50 } | |
| 51 } | |
| 52 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |