spine-runtimes/spine-lua/AnimationStateData.lua

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local AnimationStateData = {}

function AnimationStateData.new (skeletonData)
	if not skeletonData then error("skeletonData cannot be nil", 2) end

	local self = {
		skeletonData = skeletonData,
		animationToMixTime = {},
		defaultMix = 0
	}

	function self:setMix (fromName, toName, duration)
		if not self.animationToMixTime[fromName] then
			self.animationToMixTime[fromName] = {}
		end
		self.animationToMixTime[fromName][toName] = duration
	end

	function self:getMix (fromName, toName)
		local first = self.animationToMixTime[fromName]
		if not first then return self.defaultMix end
		local duration = first[toName]
		if not duration then return self.defaultMix end
		return duration
	end

	return self
end
return AnimationStateData