spine-runtimes/spine-lua/Slot.lua

-------------------------------------------------------------------------------
-- Spine Runtimes License Agreement
-- Last updated May 1, 2019. Replaces all prior versions.
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-- Copyright (c) 2013-2019, Esoteric Software LLC
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-------------------------------------------------------------------------------

local setmetatable = setmetatable

local Color = require "spine-lua.Color"

local Slot = {}
Slot.__index = Slot

function Slot.new (data, bone)
	if not data then error("slotData cannot be nil", 2) end
	if not bone then error("bone cannot be nil", 2) end

	local self = {
		data = data,
		bone = bone,
		color = Color.newWith(1, 1, 1, 1),
		darkColor = nil,
		attachment = nil,
		attachmentTime = 0,
		attachmentVertices = {}
	}	

	setmetatable(self, Slot)
	
	if data.darkColor then self.darkColor = Color.newWith(1, 1, 1, 1) end

	self:setToSetupPose()

	return self
end

function Slot:setAttachment (attachment)
	if self.attachment == attachment then return end
	self.attachment = attachment
	self.attachmentTime = self.bone.skeleton.time
	self.attachmentVertices = {}
end

function Slot:setAttachmentTime (time)
	self.attachmentTime = self.bone.skeleton.time - time
end

function Slot:getAttachmentTime ()
	return self.bone.skeleton.time - self.attachmentTime
end

function Slot:setToSetupPose ()
	local data = self.data

	self.color:setFrom(data.color)
	if self.darkColor then self.darkColor:setFrom(data.darkColor) end

	local attachment = nil
	if data.attachmentName then
		attachment = self.bone.skeleton:getAttachmentByIndex(data.index, data.attachmentName)
	end
	self:setAttachment(attachment)
end

return Slot