Orkuncakilkaya
0497029dae
Since #83 the loop commits the device layer once per frame (input_drive), but a game that ALSO called Input.poll by hand committed a second time in the same frame; input_device_commit copies in_held into in_prev at the top of every commit, so the second commit left in_prev == in_held and the edges (held && !prev) could never see a transition. Fix: an in_have_frame_driver flag. The loop's input_drive sets it; a manual Input.poll under the loop then becomes a no-op returning the frame's key instead of re-committing. An entry-driven harness has no loop, so the flag stays false and each Input.poll commits a frame as before (the #7/#50 record/replay + device tests are unchanged). Frame loop now calls input_drive. Example input_edge (press edge on the down frame, release edge on the up frame). Full suite 110/0, goldens byte-identical, fixpoint holds. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
27 lines
1.1 KiB
Text
27 lines
1.1 KiB
Text
# input_edge.ludic — Input.key_pressed / key_released edge detection (#87). A
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# handler game reads the press and release edges of a key in its Update phase; the
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# frame loop commits the device layer itself (#83), so the game does NOT call
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# Input.poll by hand, and the edges fire on exactly the transition frame. (The bug:
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# a manual Input.poll under the loop used to double-commit and copy in_held into
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# in_prev twice, so key_pressed/key_released never fired.)
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#
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# Driven headless by the keys on stdin, one char per frame. With "xkkxq":
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# x frame0 — nothing
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# k frame1 — pressed edge (down + just went down)
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# k frame2 — held (down, no edge)
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# x frame3 — released edge (was k, now not)
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# q frame4 — nothing, then quit
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#
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# Run: printf 'xkkxq' | bin/ludic examples/library/input_edge.ludic -> 0 11 1 100 0
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program InputEdge {
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property Tag { n: int = 0 }
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model P { Tag }
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handler In phase Update {
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var v = 0
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if Input.key_down('k') { v = v + 1 } # held
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if Input.key_pressed('k') { v = v + 10 } # went down this frame
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if Input.key_released('k') { v = v + 100 } # went up this frame
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print(v)
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}
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}
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