mirror of
https://github.com/EsotericSoftware/spine-runtimes.git
synced 2025-12-21 01:36:02 +08:00
107 lines
3.6 KiB
Lua
107 lines
3.6 KiB
Lua
-------------------------------------------------------------------------------
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-- Spine Runtimes Software License
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-- Version 2
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--
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-- Copyright (c) 2013, 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 install, execute and perform the Spine Runtimes
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-- Software (the "Software") solely for internal use. Without the written
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-- permission of Esoteric Software, you may not (a) modify, translate, adapt or
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-- otherwise create derivative works, improvements of the Software or develop
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-- new applications using the Software or (b) remove, delete, alter or obscure
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-- any trademarks or any copyright, trademark, patent or other intellectual
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-- property or proprietary rights notices on or in the Software, including
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-- any copy thereof. Redistributions in binary or source form must include
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-- this license and terms. THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE
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-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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-- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTARE 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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-- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 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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-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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-------------------------------------------------------------------------------
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local Bone = {}
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function Bone.new (data, parent)
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if not data then error("data cannot be nil", 2) end
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local self = {
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data = data,
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parent = parent,
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x = 0, y = 0,
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rotation = 0,
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scaleX = 1, scaleY = 1,
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m00 = 0, m01 = 0, worldX = 0, -- a b x
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m10 = 0, m11 = 0, worldY = 0, -- c d y
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worldRotation = 0,
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worldScaleX = 1, worldScaleY = 1,
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}
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function self:updateWorldTransform (flipX, flipY)
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local parent = self.parent
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if parent then
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self.worldX = self.x * parent.m00 + self.y * parent.m01 + parent.worldX
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self.worldY = self.x * parent.m10 + self.y * parent.m11 + parent.worldY
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if (self.data.inheritScale) then
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self.worldScaleX = parent.worldScaleX * self.scaleX
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self.worldScaleY = parent.worldScaleY * self.scaleY
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else
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self.worldScaleX = self.scaleX
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self.worldScaleY = self.scaleY
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end
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if (self.data.inheritRotation) then
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self.worldRotation = parent.worldRotation + self.rotation
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else
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self.worldRotation = self.rotation
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end
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else
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if flipX then
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self.worldX = -self.x
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else
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self.worldX = self.x
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end
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if flipY then
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self.worldY = -self.y
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else
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self.worldY = self.y
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end
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self.worldScaleX = self.scaleX
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self.worldScaleY = self.scaleY
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self.worldRotation = self.rotation
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end
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local radians = math.rad(self.worldRotation)
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local cos = math.cos(radians)
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local sin = math.sin(radians)
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self.m00 = cos * self.worldScaleX
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self.m10 = sin * self.worldScaleX
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self.m01 = -sin * self.worldScaleY
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self.m11 = cos * self.worldScaleY
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if flipX then
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self.m00 = -self.m00
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self.m01 = -self.m01
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end
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if flipY then
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self.m10 = -self.m10
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self.m11 = -self.m11
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end
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end
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function self:setToSetupPose ()
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local data = self.data
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self.x = data.x
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self.y = data.y
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self.rotation = data.rotation
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self.scaleX = data.scaleX
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self.scaleY = data.scaleY
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end
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return self
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end
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return Bone
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