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https://github.com/bryanthaboi/gen1recomp
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bryanthaboi
24 lines
606 B
Lua
24 lines
606 B
Lua
-- Fixed-step update loop at the Game Boy's ~60Hz. Game logic advances in
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-- whole steps regardless of the display refresh rate, which keeps movement,
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-- text speed and battle timing deterministic.
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local FixedStep = {}
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FixedStep.STEP = 1 / 60
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local MAX_ACCUM = 0.25 -- avoid spiral of death after a stall
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function FixedStep:init(callback)
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self.accum = 0
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self.callback = callback
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end
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function FixedStep:update(dt)
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self.accum = math.min(self.accum + dt, MAX_ACCUM)
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while self.accum >= self.STEP do
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self.accum = self.accum - self.STEP
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self.callback(self.STEP)
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end
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end
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return FixedStep
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