feat(game.world): speed units

src/main/java/org/auioc/mcmod/arnicalib/game/world/position/SpeedUnit.java

@@ -0,0 +1,33 @@
+package org.auioc.mcmod.arnicalib.game.world.position;
+
+import org.auioc.mcmod.arnicalib.base.function.DoubleToDoubleFunction;
+
+public enum SpeedUnit {
+
+    METRES_PER_TICK("metres per tick", "m/t", (v) -> v), //
+    METRES_PER_SECOND("metres per second", "m/s", (v) -> v * 20.0D), //
+    KILOMETRES_PER_HOUR("kilometres per hour", "km/h", (v) -> v * 72.0D);
+
+    private final String name;
+    private final String symbol;
+    private final DoubleToDoubleFunction converter;
+
+    private SpeedUnit(String name, String symbol, DoubleToDoubleFunction converter) {
+        this.name = name;
+        this.symbol = symbol;
+        this.converter = converter;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getSymbol() {
+        return symbol;
+    }
+
+    public double convertFrom(double metresPreTick) {
+        return converter.applyAsDouble(metresPreTick);
+    }
+
+}