mirror of
https://github.com/EsotericSoftware/spine-runtimes.git
synced 2025-12-21 17:56:04 +08:00
77 lines
3.0 KiB
Lua
77 lines
3.0 KiB
Lua
-------------------------------------------------------------------------------
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-- Spine Runtimes License Agreement
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-- Last updated January 1, 2020. Replaces all prior versions.
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--
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-- Copyright (c) 2013-2020, Esoteric Software LLC
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--
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-- Integration of the Spine Runtimes into software or otherwise creating
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-- derivative works of the Spine Runtimes is permitted under the terms and
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-- conditions of Section 2 of the Spine Editor License Agreement:
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-- http://esotericsoftware.com/spine-editor-license
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--
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-- Otherwise, it is permitted to integrate the Spine Runtimes into software
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-- or otherwise create derivative works of the Spine Runtimes (collectively,
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-- "Products"), provided that each user of the Products must obtain their own
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-- Spine Editor license and redistribution of the Products in any form must
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-- include this license and copyright notice.
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--
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-- THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
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-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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-- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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-- DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
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-- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
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-- BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
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-- ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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-- THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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-------------------------------------------------------------------------------
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local AttachmentType = require "spine-lua.attachments.AttachmentType"
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local VertexAttachment = require "spine-lua.attachments.VertexAttachment"
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local Color = require "spine-lua.Color"
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local math_cos = math.cos
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local math_sin = math.sin
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local PointAttachment = {}
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PointAttachment.__index = PointAttachment
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setmetatable(PointAttachment, { __index = VertexAttachment })
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function PointAttachment.new (name)
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if not name then error("name cannot be nil", 2) end
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local self = VertexAttachment.new(name, AttachmentType.point)
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self.x = 0
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self.y = 0
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self.rotation = 0
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self.color = Color.newWith(0.38, 0.94, 0, 1)
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setmetatable(self, BoundingBoxAttachment)
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return self
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end
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function PointAttachment:computeWorldPosition(bone, point)
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point.x = self.x * bone.a + self.y * bone.b + bone.worldX
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point.y = self.x * bone.c + self.y * bone.d + bone.worldY
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return point
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end
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function PointAttachment:computeWorldRotation(bone)
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local cos = math_cos(math_rad(self.rotation))
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local sin = math_sin(math_rad(self.rotation))
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local x = cos * bone.a + sin * bone.b
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local y = cos * bone.c + sin * bone.d
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return math_deg(math_atan2(y, x))
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end
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function PointAttachment:copy ()
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local copy = PointAttachment.new(self.name)
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copy.x = self.x
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copy.y = self.y
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copy.rotation = self.rotation
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copy.color:setFrom(self.color)
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return copy
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end
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return PointAttachment
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