implement BinaryColumn

common/api/src/main/java/com/dfsek/terra/api/structure/feature/BinaryColumn.java

@@ -0,0 +1,54 @@
+package com.dfsek.terra.api.structure.feature;
+
+import java.util.function.IntConsumer;
+
+public class BinaryColumn {
+    private final boolean[] data;
+    private final int minY;
+
+    public BinaryColumn(int minY, int maxY) {
+        this.minY = minY;
+        if(maxY <= minY) throw new IllegalArgumentException("Max y must be greater than min y");
+        this.data = new boolean[maxY-minY];
+    }
+
+    public void set(int y) {
+        data[y - minY] = true;
+    }
+
+    public boolean get(int y) {
+        return data[y - minY];
+    }
+
+    public void forEach(IntConsumer consumer) {
+        for(int y = 0; y < data.length; y++) {
+            if(data[y]) {
+                consumer.accept(y - minY);
+            }
+        }
+    }
+
+    public BinaryColumn and(BinaryColumn that) {
+        if(that.minY != this.minY) throw new IllegalArgumentException("Must share same min Y");
+        if(that.data.length != this.data.length) throw new IllegalArgumentException("Must share same max Y");
+        BinaryColumn next = new BinaryColumn(minY, data.length - minY);
+
+        for(int i = 0; i < this.data.length; i++) {
+            next.data[i] = this.data[i] && that.data[i];
+        }
+
+        return next;
+    }
+
+    public BinaryColumn or(BinaryColumn that) {
+        if(that.minY != this.minY) throw new IllegalArgumentException("Must share same min Y");
+        if(that.data.length != this.data.length) throw new IllegalArgumentException("Must share same max Y");
+        BinaryColumn next = new BinaryColumn(minY, data.length - minY);
+
+        for(int i = 0; i < this.data.length; i++) {
+            next.data[i] = this.data[i] || that.data[i];
+        }
+
+        return next;
+    }
+}