-------------------------------------------------------------------------------
-- Spine Runtimes Software License v2.5
--
-- Copyright (c) 2013-2016, Esoteric Software
-- All rights reserved.
--
-- You are granted a perpetual, non-exclusive, non-sublicensable, and
-- non-transferable license to use, install, execute, and perform the Spine
-- Runtimes software and derivative works solely for personal or internal
-- use. Without the written permission of Esoteric Software (see Section 2 of
-- the Spine Software License Agreement), you may not (a) modify, translate,
-- adapt, or develop new applications using the Spine Runtimes or otherwise
-- create derivative works or improvements of the Spine Runtimes or (b) remove,
-- delete, alter, or obscure any trademarks or any copyright, trademark, patent,
-- or other intellectual property or proprietary rights notices on or in the
-- Software, including any copy thereof. Redistributions in binary or source
-- form must include this license and terms.
--
-- THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR
-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-- MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
-- EVENT SHALL ESOTERIC SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS INTERRUPTION, OR LOSS OF
-- USE, DATA, OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
-- IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-- POSSIBILITY OF SUCH DAMAGE.
-------------------------------------------------------------------------------

local AttachmentType = require "spine-lua.attachments.AttachmentType"
local VertexAttachment = require "spine-lua.attachments.VertexAttachment"
local Color = require "spine-lua.Color"

local math_cos = math.cos
local math_sin = math.sin

local PointAttachment = {}
PointAttachment.__index = PointAttachment
setmetatable(PointAttachment, { __index = VertexAttachment })

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

	local self = VertexAttachment.new(name, AttachmentType.point)
	self.x = 0
	self.y = 0
	self.rotation = 0
	self.color = Color.newWith(0.38, 0.94, 0, 1)
	setmetatable(self, BoundingBoxAttachment)
	return self
end

function PointAttachment:computeWorldPosition(bone, point)
	point.x = self.x * bone.a + self.y * bone.b + bone.worldX
	point.y = self.x * bone.c + self.y * bone.d + bone.worldY
	return point
end

function PointAttachment:computeWorldRotation(bone)
	local cos = math_cos(math_rad(self.rotation))
	local sin = math_sin(math_rad(self.rotation))
	local x = cos * bone.a + sin * bone.b
	local y = cos * bone.c + sin * bone.d
	return math_deg(math_atan2(y, x))
end

return PointAttachment