From: Keith Packard <keithp@keithp.com>
Date: Thu, 13 Feb 2020 03:59:19 +0000 (-0800)
Subject: altoslib: Add 'gauss' units for magnetic field strength
X-Git-Tag: android-26~14
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=4435843fc8eb06751dbb1ba00fb2856563963e5e

altoslib: Add 'gauss' units for magnetic field strength

Compute in gauss, but display in nT (G * 100000)

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/altoslib/AltosConvert.java b/altoslib/AltosConvert.java
index ce1b8f7f..89f36a6c 100644
--- a/altoslib/AltosConvert.java
+++ b/altoslib/AltosConvert.java
@@ -473,7 +473,7 @@ public class AltosConvert {
 
 	public static AltosPyroName pyro_name = new AltosPyroName();
 
-	public static AltosUnits magnetic_field = null;
+	public static AltosUnits magnetic_field = new AltosGauss();
 
 	public static String show_gs(String format, double a) {
 		a = meters_to_g(a);
diff --git a/altoslib/AltosGauss.java b/altoslib/AltosGauss.java
new file mode 100644
index 00000000..0eed3fac
--- /dev/null
+++ b/altoslib/AltosGauss.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright © 2020 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package org.altusmetrum.altoslib_13;
+
+import java.io.*;
+
+public class AltosGauss extends AltosUnits {
+
+	public double value(double v, boolean imperial_units) {
+		return v;
+	}
+
+	public double inverse(double v, boolean imperial_units) {
+		return v;
+	}
+
+	public String show_units(boolean imperial_units) {
+		return "G";
+	}
+
+	public String say_units(boolean imperial_units) {
+		return "gauss";
+	}
+
+	public int show_fraction(int width, boolean imperial_units) {
+		return width - 1;
+	}
+
+	public AltosGauss() {
+		range_metric = new AltosUnitsRange[1];
+
+		range_metric[0] = new AltosUnitsRange(0, "γ", "nano tesla") {
+				double value(double v) {
+					return v * 100000;
+				}
+				int show_fraction(int width) {
+					return width / 9;
+				}
+				int say_fraction() {
+					return 0;
+				}
+			};
+
+		range_imperial = range_metric;
+	}
+}
diff --git a/altoslib/Makefile.am b/altoslib/Makefile.am
index 59a3b2ca..b7d30051 100644
--- a/altoslib/Makefile.am
+++ b/altoslib/Makefile.am
@@ -70,6 +70,7 @@ altoslib_JAVA = \
 	AltosGPS.java \
 	AltosGPSTimeValue.java \
 	AltosGPSSat.java \
+	AltosGauss.java \
 	AltosGreatCircle.java \
 	AltosHexfile.java \
 	AltosHexsym.java \