25 lines
1.2 KiB
Plaintext
25 lines
1.2 KiB
Plaintext
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// Built-in script for the `pusher_*` archetypes (see kiln-core/src/builtin_scripts.rs).
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//
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// A pusher is a self-propelled solid that advances one cell in its facing
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// direction every ~0.5s, shoving any pushable chain (including the player) ahead
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// and stopping when blocked. The direction is not baked into this source — every
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// pusher shares one compiled copy and learns its direction from the
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// `BUILTIN_pusher_<dir>` tag the map loader attached to it.
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fn tick(dt) {
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// Only queue a step when idle. `move` shoves the chain ahead via step_object
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// and is a no-op when blocked; the delay pads each step out to ~0.5s (move
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// itself costs 0.25s), matching the old global pusher heartbeat.
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//
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// The direction is read here, at the top level of the hook, because `Me` is a
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// per-object scope constant and is not visible inside other script functions.
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if Queue.length() == 0 {
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let dir = if Me.has_tag("BUILTIN_pusher_north") { North }
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else if Me.has_tag("BUILTIN_pusher_south") { South }
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else if Me.has_tag("BUILTIN_pusher_east") { East }
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else { West };
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move(dir);
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delay(0.25);
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}
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}
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