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[lua] Fix PathConstraint length spacing for zero length bones. See #1023.

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This commit is contained in:
badlogic 2017-10-20 11:16:44 +02:00
parent cbb37a6096
commit 52a300eeae
1 changed files with 17 additions and 7 deletions
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24
spine-lua/PathConstraint.lua
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@ -55,6 +55,7 @@ PathConstraint.__index = PathConstraint
PathConstraint.NONE = -1
PathConstraint.BEFORE = -2
PathConstraint.AFTER = -3
PathConstraint.epsilon = 0.00001
function PathConstraint.new (data, skeleton)
if not data then error("data cannot be nil", 2) end
@ -118,13 +119,22 @@ function PathConstraint:update ()
while i < n do
local bone = bones[i + 1];
local setupLength = bone.data.length
if setupLength == 0 then setupLength = 0.0000001 end
local x = setupLength * bone.a
local y = setupLength * bone.c
local length = math_sqrt(x * x + y * y)
if scale then lengths[i + 1] = length end
i = i + 1
if lengthSpacing then spaces[i + 1] = (setupLength + spacing) * length / setupLength else spaces[i + 1] = spacing * length / setupLength end
if setupLength < PathConstraint.epsilon then
if scale then lengths[i + 1] = 0 end
i = i + 1
spaces[i + 1] = 0
else
local x = setupLength * bone.a
local y = setupLength * bone.c
local length = math_sqrt(x * x + y * y)
if scale then lengths[i + 1] = length end
i = i + 1
if lengthSpacing then
spaces[i + 1] = (setupLength + spacing) * length / setupLength
else
spaces[i + 1] = spacing * length / setupLength
end
end
end
else
local i = 1