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[lua] Ported IKConstraint fix.

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badlogic 2017-05-24 17:35:00 +02:00
parent 75041ab65e
commit 5f1431c397
1 changed files with 19 additions and 16 deletions
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33
spine-lua/IkConstraint.lua
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@ -216,21 +216,24 @@ function IkConstraint:apply2 (parent, child, targetX, targetY, bendDir, alpha)
local maxX = l1 + a local maxX = l1 + a
local maxDist = maxX * maxX local maxDist = maxX * maxX
local maxY = 0 local maxY = 0
local angle = math_acos(-a * l1 / (aa - bb)) c = -a * l1 / (aa - bb)
x = a * math_cos(angle) + l1 if (c >= -1 and c <= 1) then
y = b * math_sin(angle) c = math_acos(c)
d = x * x + y * y x = a * math_cos(c) + l1
if d < minDist then y = b * math_sin(c)
minAngle = angle d = x * x + y * y
minDist = d if d < minDist then
minX = x minAngle = c
minY = y minDist = d
end minX = x
if d > maxDist then minY = y
maxAngle = angle end
maxDist = d if d > maxDist then
maxX = x maxAngle = c
maxY = y maxDist = d
maxX = x
maxY = y
end
end end
if dd <= (minDist + maxDist) / 2 then if dd <= (minDist + maxDist) / 2 then
a1 = ta - math_atan2(minY * bendDir, minX) a1 = ta - math_atan2(minY * bendDir, minX)