mirror of
https://github.com/EsotericSoftware/spine-runtimes.git
synced 2025-12-21 01:36:02 +08:00
69 lines
2.9 KiB
Lua
69 lines
2.9 KiB
Lua
-------------------------------------------------------------------------------
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-- Spine Runtimes Software License v2.5
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--
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-- Copyright (c) 2013-2016, Esoteric Software
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-- All rights reserved.
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--
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-- You are granted a perpetual, non-exclusive, non-sublicensable, and
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-- non-transferable license to use, install, execute, and perform the Spine
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-- Runtimes software and derivative works solely for personal or internal
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-- use. Without the written permission of Esoteric Software (see Section 2 of
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-- the Spine Software License Agreement), you may not (a) modify, translate,
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-- adapt, or develop new applications using the Spine Runtimes or otherwise
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-- create derivative works or improvements of the Spine Runtimes or (b) remove,
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-- delete, alter, or obscure any trademarks or any copyright, trademark, patent,
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-- or other intellectual property or proprietary rights notices on or in the
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-- Software, including any copy thereof. Redistributions in binary or source
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-- form must include this license and terms.
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--
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-- THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR
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-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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-- MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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-- EVENT SHALL ESOTERIC SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS INTERRUPTION, OR LOSS OF
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-- USE, DATA, OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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-- IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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-- 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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return PointAttachment
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