create RandomLocator

common/addons/config-locators/src/main/java/com/dfsek/terra/addons/feature/locator/locators/RandomLocator.java

@@ -0,0 +1,38 @@
+package com.dfsek.terra.addons.feature.locator.locators;
+
+import com.dfsek.terra.api.structure.feature.Locator;
+import com.dfsek.terra.api.util.Range;
+import com.dfsek.terra.api.world.Column;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+public class RandomLocator implements Locator {
+    private final Range height;
+
+    private final Range points;
+
+    public RandomLocator(Range height, Range points) {
+        this.height = height;
+        this.points = points;
+    }
+
+    @Override
+    public List<Integer> getSuitableCoordinates(Column column) {
+        long seed = column.getWorld().getSeed();
+        seed = 31 * seed + column.getX();
+        seed = 31 * seed + column.getZ();
+
+        Random r = new Random(seed);
+
+        int size = points.get(r);
+
+        List<Integer> results = new ArrayList<>(size);
+        for(int i = 0; i < size; i++) {
+            results.set(i, height.get(r));
+        }
+
+        return results;
+    }
+}