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+#ifndef LOCATABLE_H_39E526CA
+#define LOCATABLE_H_39E526CA
+
+#include "component.h"
+#include "vector.h"
+
+class TransformableComponent : public Component {
+public:
+
+  /**
+   * The coordinates of the entity.
+   *
+   * Note that ponderable entities sometimes have special behavior related to
+   * their coordinates, specifically that ferried bodies will behave oddly if
+   * their coordinates are changed outside of the PonderingSystem. Before doing
+   * so, use PonderingSystem::unferry on the body to ensure that it is not
+   * ferried.
+   */
+  vec2d pos;
+
+  /**
+   * The size of the entity.
+   */
+  vec2i size;
+
+  /**
+   * For prototypes, the original coordinates and size of the entity.
+   *
+   * @managed_by RealizingSystem
+   */
+  vec2d origPos;
+  vec2i origSize;
+};
+
+#endif /* end of include guard: LOCATABLE_H_39E526CA */