16 lines
1.2 KiB
Text
16 lines
1.2 KiB
Text
# port.ludic - what the things ask the game. Every member has a default: unbound, the ground is at
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# 0, nothing is drawn, and the save keeps what its kind says to keep.
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export port ThingsWorld {
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ground: fn(float, float) -> float = fn th_flat # the height a moved Thing stands at
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placed: fn(Thing) -> void = fn th_nothing # a Thing exists now: draw it
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removed: fn(Thing) -> void = fn th_nothing # it is gone for good: stop drawing it
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shown: fn(Thing) -> void = fn th_nothing # its `active` changed: show or hide it
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moved: fn(Thing) -> void = fn th_nothing # it stands somewhere else now
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keeps: fn(Thing) -> bool = fn th_kind_saves # the save's section carries it
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put_down: fn(Thing) -> bool = fn th_kind_put_down # set down by someone: a restock leaves it be
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restored: fn(Thing) -> void = fn th_nothing # a load put it back (after `placed`)
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}
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function th_flat(x: float, z: float) -> float { return 0.0 }
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function th_nothing(t: Thing) -> void { }
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function th_kind_saves(t: Thing) -> bool { return thing_kind_ok(t.kind) and ThingKinds[t.kind].saved }
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function th_kind_put_down(t: Thing) -> bool { return thing_kind_ok(t.kind) and ThingKinds[t.kind].put_down }
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