Entities are now definable

lib/entities/harvester.rb

@@ -0,0 +1,34 @@
+IMICRTS::Entity.define_entity(:harvester, :unit, 1400, "Harvests ore") do |entity, director|
+  entity.radius = 10
+  entity.movement = :ground
+  entity.max_health = 100.0
+
+  entity.body_image = "vehicles/harvester/images/harvester.png"
+  entity.shell_image = "vehicles/harvester/images/harvester.png"
+
+  @capacity = 10.0
+  @bed = 0.0
+
+  entity.on_tick do
+    if @bed >= @capacity
+      entity.seek_refinery
+    else
+      entity.seek_ore
+    end
+  end
+
+  entity.define_singleton_method(:seek_ore) do
+    ore = director.map.ores.compact.sort_by { |ore| next unless ore; ore.position.distance(entity.position) }.first
+
+    n = (ore.position - entity.position).normalized
+    n.z = 0
+    entity.position += n * 3
+  end
+
+  entity.define_singleton_method(:seek_refinery) do
+  end
+
+  entity.define_singleton_method(:rotate_towards) do |target|
+    entity.angle = Gosu.angle(target.x, target.y, entity.position.x, entity.position.y)
+  end
+end