This package contains various entities of the game, things such as players, items, monsters etc. An entity represents something that has a set of components (i.e. columns) and is expressed as a view over a row that is lazily evaluated by various systems.

For example, a mobile entity takes a pointer over a specific row and allows us to read/write columns by simply accessing the properties instead of dealing with the internals of the data storage layer. In the example below, we have Location() tile.Point and SetLocation(tile.Point) methods on our mobile entity, which contain the necessary code to read/write but the entity itself does not have any state besides a Cursor. This allows us to lazily evaluate and only read the necessary data when accessing it.

// Mobile represents a view on a current mobile row
type Mobile struct {
	row *column.Cursor
}

// Location reads the current location
func (m *Mobile) Location() tile.Point {
    // read the "location" column
}

// SetLocation writes the current location
func (m *Mobile) SetLocation(v tile.Point) {
	// write the "location" column
}