IliaDenisov
37 lines
640 B
Go
37 lines
640 B
Go
package world
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func (w *World) candSeenResetIfOverflow() {
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w.candEpoch++
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if w.candEpoch != 0 {
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return
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}
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// overflow: reset stamp array
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for i := range w.candStamp {
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w.candStamp[i] = 0
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}
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w.candEpoch = 1
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}
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func (w *World) candSeenMark(id PrimitiveID) bool {
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// ensure stamp capacity
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uid := uint32(id)
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if int(uid) >= len(w.candStamp) {
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// grow to next power-ish
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n := len(w.candStamp)
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if n == 0 {
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n = 1024
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}
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for n <= int(uid) {
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n *= 2
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}
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ns := make([]uint32, n)
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copy(ns, w.candStamp)
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w.candStamp = ns
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}
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if w.candStamp[uid] == w.candEpoch {
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return true
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}
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w.candStamp[uid] = w.candEpoch
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return false
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}
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