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31 lines
763 B
Go
31 lines
763 B
Go
package sim
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// tile is an individual cell within the world simulation. Everything happens
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// on a tile.
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type tile struct {
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// floor is the surface for the tile. All things sit atop the floor. The
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// floor informs clients how to draw the tile in the event that the tile's
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// contents are empty. The floor also determins whether or not the tile is
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// traversable.
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floor floor
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// contents is all of the entities on this tile. A given tile may have many
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// entities.
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contents map[int]entity
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}
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func (t *tile) addEntity(e entity) {
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if t.contents == nil {
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t.contents = make(map[int]entity)
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}
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t.contents[e.id()] = e
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}
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func (t *tile) removeEntity(id int) entity {
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if e, here := t.contents[id]; here {
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delete(t.contents, id)
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return e
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}
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return nil
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}
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