Esoteric Software

[WickeyWare]

When using Gunman Asset Pack aiming is done by rotating an IK called AimPivot. In Spine 3.6 this worked. In 3.7, it no longer works at all.

I will show pictures and explain as clearly as possible.

This is how it works in 3.6. The entire body is rotated with the AimPivot

spine3.6.png

In 3.7 nothing rotates except the weapon itself. The arms stay fixed.

spine3.7.png

The issue lies in Animation.lua or the AnimationState.lua files as if I revert those two alone the issue is resolved.


Each tick of the game this occurs

local currentTime = system.getTimer() / 1000
local delta = currentTime - lastTime
lastTime = currentTime
animationState:update(delta)
animationState:apply(skeleton)
skeleton:updateWorldTransform()

aiming the weapon simply does this

obj.aim = function(val)
if (aimPivotBone == nil) then
aimPivotBone = skeleton:findBone("AimPivot")
end
aimPivotBone.rotation = val
end

and equipping a weapon

animationState:setAnimationByName(1, "weapon.setupAnim", false)
animationState:setAnimationByName(2, "weapon.idleAnim", true, 0)

[badlogic]

That is a bug! I've filed an issue here and will follow up once I figured out what's going wrong. [lua] IK constraint not working as intended · #1353

[badlogic]

I've looked into this, using the following test code and the original Gunman asset:

require("mobdebug").start()

local spine = require "spine-corona.spine"

function loadSkeleton(atlasFile, jsonFile, x, y, scale, animation, skin)
local imageLoader = function (path)
local paint = { type = "image", filename = "data/" .. path }
return paint
end
local atlas = spine.TextureAtlas.new(spine.utils.readFile("data/" .. atlasFile), imageLoader)
local json = spine.SkeletonJson.new(spine.AtlasAttachmentLoader.new(atlas))
json.scale = scale
local skeletonData = json:readSkeletonDataFile("data/" .. jsonFile)

local skeleton = spine.Skeleton.new(skeletonData)
skeleton.scaleY = -1
skeleton.group.x = x
skeleton.group.y = y
if skin then skeleton:setSkin(skin) end
local animationStateData = spine.AnimationStateData.new(skeletonData)
animationStateData.defaultMix = 0.5
local animationState = spine.AnimationState.new(animationStateData)
return { skeleton = skeleton, state = animationState }
end

local lastTime = 0
local result = loadSkeleton("Gunman.atlas", "Gunman.json", 240, 300, 0.4, "Run")
local skeleton = result.skeleton
local state = result.state
state:setAnimationByName(0, "Run", true)
state:setAnimationByName(1, "Aim_Sniper", true)
local aimBone = skeleton:findBone("AimPivot")

display.setDefault("background", 0.2, 0.2, 0.2, 1)

Runtime:addEventListener("enterFrame", function (event)
local currentTime = event.time / 1000
local delta = currentTime - lastTime
lastTime = currentTime

aimBone.rotation = 45;

state:update(delta)
state:apply(skeleton)
skeleton:updateWorldTransform()
end)

Which gives the following expected result using the 3.7 runtimes:



Please modify the above code to reproduce the issue.

[WickeyWare]

Thanks for the quick response!

Unfortunately there's still something there. Just add a single line of code to your example to equip the weapon and it no longer rotates.

state:setAnimationByName(0, "Idle", true)
state:setAnimationByName(1, "Setup_Sniper", false)
state:setAnimationByName(2, "Aim_Sniper", true)

See here

Screen Shot 2019-05-14 at 12.25.43 PM.png

vs not equipping the weapon

Screen Shot 2019-05-14 at 12.27.22 PM.png

[badlogic]

Cheers, I've re-opened the issue and am having another look.

[badlogic]

This is now fixed in the 3.7 and 3.8-beta branches. Thanks for reporting!

[WickeyWare]

Confirmed fixed. Thank you!