feat: seeds

packages/farm/src/traits/seeds.js

@@ -0,0 +1,24 @@
+import {Rectangle, Vector} from '@avocado/math';
+import {Trait} from '@avocado/traits';
+
+export default () => class Seeds extends Trait {
+
+  // eslint-disable-next-line class-methods-use-this
+  methods() {
+    return {
+
+      isPlantAt: (position, list) => {
+        const entities = list.visibleEntities(Rectangle.centerOn(position, [1, 1]));
+        for (let i = 0; i < entities.length; ++i) {
+          const entity = entities[i];
+          if (Vector.equals(entity.position, position) && entity.is('Plant')) {
+            return true;
+          }
+        }
+        return false;
+      },
+
+    };
+  }
+
+};