71 lines
2.4 KiB
Text
71 lines
2.4 KiB
Text
# read.ludic - reading the ground. A print is read once: reading it again says the same thing
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# and counts nothing, so pressing a key over one print is not as good as walking a trail.
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export function tracks_fresh_of(tracks_st: TracksState, age: float) -> int {
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if age > tracks_st.tk_recent_h { return TRACK_OLD }
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if age > tracks_st.tk_fresh_h { return TRACK_RECENT }
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return TRACK_FRESH
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}
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function tk_push(tracks_st: mut TracksState, f: TrackRead) -> void {
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if f.first { tracks_st.tk_read_n += 1 }
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q_push(tracks_reads(tracks_st), f)
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}
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# read the print at a slot (tracks_nearest's answer): a fact every time, a count the first time
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export function tracks_read(tracks_st: mut TracksState, slot: int) -> void {
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if slot < 0 or tracks_st.tk_ring == null or slot >= len(tracks_st.tk_ring) { return }
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let t = tracks_st.tk_ring[slot]
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let f = tk_rec(tracks_st)
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f.sp = t.sp
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f.source = TRACK_PRINT
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f.kind = slot / tracks_st.tk_cap
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f.legend = t.legend
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f.age = tracks_age(tracks_st, slot)
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f.fresh = tracks_fresh_of(tracks_st, f.age)
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f.yaw = t.yaw
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f.named = tk_named(tracks_st)
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f.bearing = tk_bearing(t.yaw)
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f.first = not t.read
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t.read = true
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tracks_note_bearing(tracks_st, t.yaw)
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tk_chain_read(tracks_st, t)
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tk_push(tracks_st, f)
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}
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# a sign that is not a print (droppings, a legend's mark): the caller knows whether it is the
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# first reading of it
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export function tracks_note(tracks_st: mut TracksState, sp: int, source: int, legend: bool, yaw: float, first: bool) -> void {
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let f = tk_rec(tracks_st)
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f.sp = sp
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f.source = source
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f.legend = legend
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f.yaw = yaw
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f.named = tk_named(tracks_st)
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f.bearing = tk_bearing(yaw)
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f.first = first
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tk_push(tracks_st, f)
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}
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# the way the last thing read went (a bed, droppings, a print)
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export function tracks_note_bearing(tracks_st: mut TracksState, yaw: float) -> void {
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tracks_st.tk_yaw = yaw
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tracks_st.tk_has_yaw = true
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}
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export function tracks_set_read_count(tracks_st: mut TracksState, n: int) -> void { tracks_st.tk_read_n = n }
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# a reading's record from the queue's ring (ludic.base's q_rec), every field back to its default
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function tk_rec(tracks_st: mut TracksState) -> TrackRead {
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var f = q_rec(tracks_reads(tracks_st))
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if f == null {
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@alloc_ok("past the ring: more readings in a frame than its records, then kept in it")
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f = new TrackRead
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q_ring_add(tracks_reads(tracks_st), f)
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}
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f.kind = 0
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f.age = 0.0
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f.fresh = 0
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f.named = true
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f.bearing = ""
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return f
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}
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