mirror of
https://github.com/EsotericSoftware/spine-runtimes.git
synced 2025-12-21 17:56:04 +08:00
345 lines
9.8 KiB
Lua
345 lines
9.8 KiB
Lua
-------------------------------------------------------------------------------
|
|
-- 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 setmetatable = setmetatable
|
|
local math_rad = math.rad
|
|
local math_deg = math.deg
|
|
local math_sin = math.sin
|
|
local math_cos = math.cos
|
|
local math_atan2 = math.atan2
|
|
local math_sqrt = math.sqrt
|
|
|
|
function math.sign(x)
|
|
if x<0 then
|
|
return -1
|
|
elseif x>0 then
|
|
return 1
|
|
else
|
|
return 0
|
|
end
|
|
end
|
|
|
|
local math_sign = math.sign
|
|
|
|
local Bone = {}
|
|
Bone.__index = Bone
|
|
|
|
function Bone.new (data, skeleton, parent)
|
|
if not data then error("data cannot be nil", 2) end
|
|
if not skeleton then error("skeleton cannot be nil", 2) end
|
|
|
|
local self = {
|
|
data = data,
|
|
skeleton = skeleton,
|
|
parent = parent,
|
|
children = { },
|
|
x = 0, y = 0, rotation = 0, scaleX = 1, scaleY = 1, shearX = 0, shearY = 0,
|
|
appliedRotation = 0,
|
|
|
|
a = 0, b = 0, worldX = 0, -- a b x
|
|
c = 0, d = 0, worldY = 0, -- c d y
|
|
worldSignX = 0, worldSignY = 0,
|
|
sorted = false
|
|
}
|
|
setmetatable(self, Bone)
|
|
|
|
self:setToSetupPose()
|
|
return self
|
|
end
|
|
|
|
function Bone:update ()
|
|
self:updateWorldTransformWith(self.x, self.y, self.rotation, self.scaleX, self.scaleY, self.shearX, self.shearY)
|
|
end
|
|
|
|
function Bone:updateWorldTransform ()
|
|
self:updateWorldTransformWith(self.x, self.y, self.rotation, self.scaleX, self.scaleY, self.shearX, self.shearY)
|
|
end
|
|
|
|
function Bone:updateWorldTransformWith (x, y, rotation, scaleX, scaleY, shearX, shearY)
|
|
self.appliedRotation = rotation
|
|
|
|
local rotationY = rotation + 90 + shearY
|
|
local rotationRad = math_rad(rotation + shearX)
|
|
local rotationYRad = math_rad(rotationY)
|
|
local la = math_cos(rotationRad) * scaleX
|
|
local lb = math_cos(rotationYRad) * scaleY
|
|
local lc = math_sin(rotationRad) * scaleX
|
|
local ld = math_sin(rotationYRad) * scaleY
|
|
|
|
local parent = self.parent
|
|
if parent == nil then
|
|
local skeleton = self.skeleton
|
|
if skeleton.flipX then
|
|
x = -x
|
|
la = -la
|
|
lb = -lb
|
|
end
|
|
if skeleton.flipY then
|
|
y = -y
|
|
lc = -lc
|
|
ld = -ld
|
|
end
|
|
self.a = la
|
|
self.b = lb
|
|
self.c = lc
|
|
self.d = ld
|
|
self.worldX = x
|
|
self.worldY = y
|
|
self.worldSignX = math_sign(scaleX)
|
|
self.worldSignY = math_sign(scaleY)
|
|
return
|
|
end
|
|
|
|
local pa = parent.a
|
|
local pb = parent.b
|
|
local pc = parent.c
|
|
local pd = parent.d
|
|
self.worldX = pa * x + pb * y + parent.worldX
|
|
self.worldY = pc * x + pd * y + parent.worldY
|
|
self.worldSignX = parent.worldSignX * math_sign(scaleX)
|
|
self.worldSignY = parent.worldSignY * math_sign(scaleY)
|
|
|
|
if self.data.inheritRotation and self.data.inheritScale then
|
|
self.a = pa * la + pb * lc
|
|
self.b = pa * lb + pb * ld
|
|
self.c = pc * la + pd * lc
|
|
self.d = pc * lb + pd * ld
|
|
else
|
|
if self.data.inheritRotation then
|
|
pa = 1
|
|
pb = 0
|
|
pc = 0
|
|
pd = 1
|
|
repeat
|
|
local appliedRotationRad = math_rad(parent.appliedRotation)
|
|
local cos = math_cos(appliedRotationRad)
|
|
local sin = math_sin(appliedRotationRad)
|
|
local temp = pa * cos + pb * sin
|
|
pb = pb * cos - pa * sin
|
|
pa = temp
|
|
temp = pc * cos + pd * sin
|
|
pd = pd * cos - pc * sin
|
|
pc = temp
|
|
|
|
if not parent.data.inheritRotation then break end
|
|
parent = parent.parent
|
|
until parent == nil
|
|
self.a = pa * la + pb * lc
|
|
self.b = pa * lb + pb * ld
|
|
self.c = pc * la + pd * lc
|
|
self.d = pc * lb + pd * ld
|
|
elseif self.data.inheritScale then
|
|
pa = 1
|
|
pb = 0
|
|
pc = 0
|
|
pd = 1
|
|
repeat
|
|
local appliedRotationRad = math_rad(parent.appliedRotation)
|
|
local cos = math_cos(appliedRotationRad)
|
|
local sin = math_sin(appliedRotationRad)
|
|
local psx = parent.scaleX
|
|
local psy = parent.scaleY
|
|
local za = cos * psx
|
|
local zb = sin * psy
|
|
local zc = sin * psx
|
|
local zd = cos * psy
|
|
local temp = pa * za + pb * zc
|
|
pb = pb * zd - pa * zb
|
|
pa = temp
|
|
temp = pc * za + pd * zc
|
|
pd = pd * zd - pc * zb
|
|
pc = temp
|
|
|
|
if psx >= 0 then sin = -sin end
|
|
temp = pa * cos + pb * sin
|
|
pb = pb * cos - pa * sin
|
|
pa = temp
|
|
temp = pc * cos + pd * sin
|
|
pd = pd * cos - pc * sin
|
|
pc = temp
|
|
|
|
if not parent.data.inheritScale then break end
|
|
parent = parent.parent
|
|
until parent == nil
|
|
self.a = pa * la + pb * lc
|
|
self.b = pa * lb + pb * ld
|
|
self.c = pc * la + pd * lc
|
|
self.d = pc * lb + pd * ld
|
|
else
|
|
self.a = la
|
|
self.b = lb
|
|
self.c = lc
|
|
self.d = ld
|
|
end
|
|
if self.skeleton.flipX then
|
|
self.a = -self.a
|
|
self.b = -self.b
|
|
end
|
|
if self.skeleton.flipY then
|
|
self.c = -self.c
|
|
self.d = -self.d
|
|
end
|
|
end
|
|
end
|
|
|
|
function Bone:setToSetupPose ()
|
|
local data = self.data
|
|
self.x = data.x
|
|
self.y = data.y
|
|
self.rotation = data.rotation
|
|
self.scaleX = data.scaleX
|
|
self.scaleY = data.scaleY
|
|
self.shearX = data.shearX
|
|
self.shearY = data.shearY
|
|
end
|
|
|
|
function Bone:getWorldRotationX ()
|
|
return math_deg(math_atan2(self.c, self.a))
|
|
end
|
|
|
|
function Bone:getWorldRotationY ()
|
|
return math_deg(math_atan2(self.d, self.b))
|
|
end
|
|
|
|
function Bone:getWorldScaleX ()
|
|
return math_sqrt(self.a * self.a + self.b * self.b) * self.worldSignX
|
|
end
|
|
|
|
function Bone:getWorldScaleY ()
|
|
return math_sqrt(self.c * self.c + self.d * self.d) * self.worldSignY
|
|
end
|
|
|
|
function Bone:worldToLocalRotationX ()
|
|
local parent = self.parent
|
|
if parent == nil then return self.rotation end
|
|
local pa = parent.a
|
|
local pb = parent.b
|
|
local pc = parent.c
|
|
local pd = parent.d
|
|
local a = self.a
|
|
local c = self.c
|
|
return math_deg(math_atan2(pa * c - pc * a, pd * a - pb * c))
|
|
end
|
|
|
|
function Bone:worldToLocalRotationY ()
|
|
local parent = self.parent
|
|
if parent == nil then return self.rotation end
|
|
local pa = parent.a
|
|
local pb = parent.b
|
|
local pc = parent.c
|
|
local pd = parent.d
|
|
local b = self.b
|
|
local d = self.d
|
|
return math_deg(math_atan2(pa * d - pc * b, pd * b - pb * d))
|
|
end
|
|
|
|
function Bone:rotateWorld (degrees)
|
|
local a = self.a
|
|
local b = self.b
|
|
local c = self.c
|
|
local d = self.d
|
|
local degreesRad = math_rad(degrees)
|
|
local cos = math_cos(degreesRad)
|
|
local sin = math_sin(degreesRad)
|
|
self.a = cos * a - sin * c
|
|
self.b = cos * b - sin * d
|
|
self.c = sin * a + cos * c
|
|
self.d = sin * b + cos * d
|
|
end
|
|
|
|
function updateLocalTransform ()
|
|
local parent = self.parent
|
|
if parent == nil then
|
|
self.x = self.worldX
|
|
self.y = self.worldY
|
|
self.rotation = math_deg(math_atan2(self.c, self.a))
|
|
self.scaleX = math_sqrt(self.a * self.a + self.c * self.c)
|
|
self.scaleY = math_sqrt(self.b * self.b + self.d * self.d)
|
|
local det = self.a * self.d - self.b * self.c
|
|
self.shearX = 0
|
|
self.shearY = math_deg(math_atan2(self.a * self.b + self.c * self.d, det))
|
|
return
|
|
end
|
|
local pa = parent.a
|
|
local pb = parent.b
|
|
local pc = parent.c
|
|
local pd = parent.d
|
|
local pid = 1 / (pa * pd - pb * pc)
|
|
local dx = self.worldX - parent.worldX
|
|
local dy = self.worldY - parent.worldY
|
|
self.x = (dx * pd * pid - dy * pb * pid)
|
|
self.y = (dy * pa * pid - dx * pc * pid)
|
|
local ia = pid * pd
|
|
local id = pid * pa
|
|
local ib = pid * pb
|
|
local ic = pid * pc
|
|
local ra = ia * self.a - ib * self.c
|
|
local rb = ia * self.b - ib * self.d
|
|
local rc = id * self.c - ic * self.a
|
|
local rd = id * self.d - ic * self.b
|
|
self.shearX = 0
|
|
self.scaleX = math_sqrt(ra * ra + rc * rc)
|
|
if self.scaleX > 0.0001 then
|
|
local det = ra * rd - rb * rc
|
|
self.scaleY = det / self.scaleX
|
|
self.shearY = math_deg(math_atan2(ra * rb + rc * rd, det))
|
|
self.rotation = math_deg(math_atan2(rc, ra))
|
|
else
|
|
self.scaleX = 0
|
|
self.scaleY = math_sqrt(rb * rb + rd * rd)
|
|
self.shearY = 0
|
|
self.rotation = 90 - math_deg(math_atan2(rd, rb))
|
|
end
|
|
self.appliedRotation = self.rotation
|
|
end
|
|
|
|
function Bone:worldToLocal (world)
|
|
local a = self.a
|
|
local b = self.b
|
|
local c = self.c
|
|
local d = self.d
|
|
local invDet = 1 / (a * d - b * c)
|
|
local x = world[1] - self.worldX
|
|
local y = world[2] - self.worldY
|
|
world[1] = (x * d * invDet - y * b * invDet)
|
|
world[2] = (y * a * invDet - x * c * invDet)
|
|
return world
|
|
end
|
|
|
|
function Bone:localToWorld (localCoords)
|
|
local x = localCoords[1]
|
|
local y = localCoords[2]
|
|
localCoords[1] = x * self.a + y * self.b + self.worldX
|
|
localCoords[2] = x * self.c + y * self.d + self.worldY
|
|
return localCoords
|
|
end
|
|
|
|
return Bone
|