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Diffstat (limited to 'engine/src/desktop/jme3tools/navigation/Coordinate.java')
| -rw-r--r-- | engine/src/desktop/jme3tools/navigation/Coordinate.java | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/engine/src/desktop/jme3tools/navigation/Coordinate.java b/engine/src/desktop/jme3tools/navigation/Coordinate.java new file mode 100644 index 0000000..6e2c2d2 --- /dev/null +++ b/engine/src/desktop/jme3tools/navigation/Coordinate.java @@ -0,0 +1,247 @@ +/* + * To change this template, choose Tools | Templates + * and open the template in the editor. + */ +package jme3tools.navigation; + +import java.text.DecimalFormat; + +/** + * Coordinate class. Used to store a coordinate in [DD]D MM.M format. + * + * @author Benjamin Jakobus (based on JMarine by Benjamin Jakobus and Cormac Gebruers) + * @version 1.0 + * @since 1.0 + */ +public class Coordinate { + + /* the degree part of the position (+ N/E, -W/S) */ + private int deg; + + /* the decimals of a minute */ + private double minsDecMins; + + /* the coordinate as a decimal*/ + private double decCoordinate; + + /* whether this coordinate is a latitude or a longitude: : LAT==0, LONG==1 */ + private int coOrdinate; + + /* The minutes trailing decimal precision to use for positions */ + public static final int MINPRECISION = 4; + /* The degrees trailing decimal precision to use for positions */ + public static final int DEGPRECISION = 7; + + /* typeDefs for coOrdinates */ + public static final int LAT = 0; + public static final int LNG = 1; + + /* typeDefs for quadrant */ + public static final int E = 0; + public static final int S = 1; + public static final int W = 2; + public static final int N = 3; + + /** + * Constructor + * + * @param deg + * @param minsDecMins + * @param coOrdinate + * @param quad + * @throws InvalidPositionException + * @since 1.0 + */ + public Coordinate(int deg, float minsDecMins, int coOrdinate, + int quad) throws InvalidPositionException { + buildCoOrdinate(deg, minsDecMins, coOrdinate, quad); + if (verify()) { + } else { + throw new InvalidPositionException(); + } + } + + /** + * Constructor + * @param decCoordinate + * @param coOrdinate + * @throws InvalidPositionException + * @since 1.0 + */ + public Coordinate(double decCoordinate, int coOrdinate) throws InvalidPositionException { + DecimalFormat form = new DecimalFormat("#.#######"); + + this.decCoordinate = decCoordinate; + this.coOrdinate = coOrdinate; + if (verify()) { + deg = new Float(decCoordinate).intValue(); + if (deg < 0) { + minsDecMins = Double.parseDouble(form.format((Math.abs(decCoordinate) - Math.abs(deg)) * 60)); + } else { + minsDecMins = Double.parseDouble(form.format((decCoordinate - deg) * 60)); + } + } else { + throw new InvalidPositionException(); + } + } + + /** + * This constructor takes a coordinate in the ALRS formats i.e + * 38∞31.64'N for lat, and 28∞19.12'W for long + * Note: ALRS positions are occasionally written with the decimal minutes + * apostrophe in the 'wrong' place and with an non CP1252 compliant decimal character. + * This issue has to be corrected in the source database + * @param coOrdinate + * @throws InvalidPositionException + * @since 1.0 + */ + public Coordinate(String coOrdinate) throws InvalidPositionException { + //firstly split it into its component parts and dispose of the unneeded characters + String[] items = coOrdinate.split("°"); + int deg = Integer.valueOf(items[0]); + + items = items[1].split("'"); + float minsDecMins = Float.valueOf(items[0]); + char quad = items[1].charAt(0); + + switch (quad) { + case 'N': + buildCoOrdinate(deg, minsDecMins, Coordinate.LAT, Coordinate.N); + break; + case 'S': + buildCoOrdinate(deg, minsDecMins, Coordinate.LAT, Coordinate.S); + break; + case 'E': + buildCoOrdinate(deg, minsDecMins, Coordinate.LNG, Coordinate.E); + break; + case 'W': + buildCoOrdinate(deg, minsDecMins, Coordinate.LNG, Coordinate.W); + } + if (verify()) { + } else { + throw new InvalidPositionException(); + } + } + + /** + * Prints out a coordinate as a string + * @return the coordinate in decimal format + * @since 1.0 + */ + public String toStringDegMin() { + String str = ""; + String quad = ""; + StringUtil su = new StringUtil(); + switch (coOrdinate) { + case LAT: + if (decCoordinate >= 0) { + quad = "N"; + } else { + quad = "S"; + } + str = su.padNumZero(Math.abs(deg), 2); + str += "\u00b0" + su.padNumZero(Math.abs(minsDecMins), 2, MINPRECISION) + "'" + quad; + break; + case LNG: + if (decCoordinate >= 0) { + quad = "E"; + } else { + quad = "W"; + } + str = su.padNumZero(Math.abs(deg), 3); + str += "\u00b0" + su.padNumZero(Math.abs(minsDecMins), 2, MINPRECISION) + "'" + quad; + break; + } + return str; + } + + /** + * Prints out a coordinate as a string + * @return the coordinate in decimal format + * @since 1.0 + */ + public String toStringDec() { + StringUtil u = new StringUtil(); + switch (coOrdinate) { + case LAT: + return u.padNumZero(decCoordinate, 2, DEGPRECISION); + case LNG: + return u.padNumZero(decCoordinate, 3, DEGPRECISION); + } + return "error"; + } + + /** + * Returns the coordinate's decimal value + * @return float the decimal value of the coordinate + * @since 1.0 + */ + public double decVal() { + return decCoordinate; + } + + /** + * Determines whether a decimal position is valid + * @return result of validity test + * @since 1.0 + */ + private boolean verify() { + switch (coOrdinate) { + case LAT: + if (Math.abs(decCoordinate) > 90.0) { + return false; + } + break; + + case LNG: + if (Math.abs(decCoordinate) > 180) { + return false; + } + } + return true; + } + + /** + * Populate this object by parsing the arguments to the function + * Placed here to allow multiple constructors to use it + * @since 1.0 + */ + private void buildCoOrdinate(int deg, float minsDecMins, int coOrdinate, + int quad) { + NumUtil nu = new NumUtil(); + + switch (coOrdinate) { + case LAT: + switch (quad) { + case N: + this.deg = deg; + this.minsDecMins = minsDecMins; + this.coOrdinate = coOrdinate; + decCoordinate = nu.Round(this.deg + (float) this.minsDecMins / 60, Coordinate.MINPRECISION); + break; + + case S: + this.deg = -deg; + this.minsDecMins = minsDecMins; + this.coOrdinate = coOrdinate; + decCoordinate = nu.Round(this.deg - ((float) this.minsDecMins / 60), Coordinate.MINPRECISION); + } + + case LNG: + switch (quad) { + case E: + this.deg = deg; + this.minsDecMins = minsDecMins; + this.coOrdinate = coOrdinate; + decCoordinate = nu.Round(this.deg + ((float) this.minsDecMins / 60), Coordinate.MINPRECISION); + break; + + case W: + this.deg = -deg; + this.minsDecMins = minsDecMins; + this.coOrdinate = coOrdinate; + decCoordinate = nu.Round(this.deg - ((float) this.minsDecMins / 60), Coordinate.MINPRECISION); + } + } + } +} |