mirror of
https://github.com/EsotericSoftware/spine-runtimes.git
synced 2025-12-20 17:26:01 +08:00
80 lines
2.9 KiB
Lua
80 lines
2.9 KiB
Lua
-------------------------------------------------------------------------------
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-- Copyright (c) 2013, Esoteric Software
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-- All rights reserved.
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--
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-- Redistribution and use in source and binary forms, with or without
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-- modification, are permitted provided that the following conditions are met:
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--
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-- 1. Redistributions of source code must retain the above copyright notice, this
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-- list of conditions and the following disclaimer.
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-- 2. Redistributions in binary form must reproduce the above copyright notice,
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-- this list of conditions and the following disclaimer in the documentation
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-- and/or other materials provided with the distribution.
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--
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-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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-- ANY 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 THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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-- ANY 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 THIS
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-- 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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}
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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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self.worldScaleX = parent.worldScaleX * self.scaleX
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self.worldScaleY = parent.worldScaleY * self.scaleY
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self.worldRotation = parent.worldRotation + self.rotation
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else
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self.worldX = flipX ? -self.x : self.x
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self.worldY = flipY ? -self.y : self.y
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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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