Just started using Corona and have done quite a few of the tutorials, was wondering if there was a simple ragdoll style example anyplace I could play around with?
If not could someone point me in the right direction as to where an explanation of this might be? Could really be in any language I guess and I could try and fiddle around with re-creating in Lua.
Thank you! [import]uid: 10747 topic_id: 3194 reply_id: 303194[/import]
I’d love an example too! [import]uid: 9905 topic_id: 3194 reply_id: 9556[/import]
Well here is a first stab at some ragdoll code. I have a couple questions:
Please let me know of any better ways to do this. Thank you! This requires the “gameUI.lua” file also.
[lua]–> Setup Display
display.setStatusBar (display.HiddenStatusBar)
system.activate (“multitouch”)
–> Start Physics
local physics = require (“physics”)
local gameUI = require(“gameUI”)
physics.start ()
physics.setGravity (0, 10)
–physics.setDrawMode (“hybrid”)
–> Create Walls
local leftWall = display.newRect (0, 0, 1, display.contentHeight)
local rightWall = display.newRect (display.contentWidth, 0, 1, display.contentHeight)
local ceiling = display.newRect (0, 0, display.contentWidth, 1)
local floor = display.newRect (0, display.contentHeight, display.contentWidth, 1)
physics.addBody (leftWall, “static”, {bounce = 0.0, friction = 10})
physics.addBody (rightWall, “static”, {bounce = 0.0, friction = 10})
physics.addBody (ceiling, “static”, {bounce = 0.0, friction = 10})
physics.addBody (floor, “static”, {bounce = 0.0, friction = 10})
–> Create Ragdoll Group
local originX = 160
local originY = 50
local spacing = 1
local ragdoll = display.newGroup ()
local head = display.newCircle( 0, 0, 15 )
–local head = display.newImage( “head.png” )
head.x = originX
head.y = originY
head:setFillColor (255, 255, 255, 128)
ragdoll:insert (head)
local torsoA = display.newRect( 0, 0, 45, 24 )
torsoA.x = originX
torsoA.y = originY + head.height
torsoA:setFillColor (255, 255, 255, 128)
ragdoll:insert (torsoA)
local torsoB = display.newRect( 0, 0, 37.5, 24 )
torsoB.x = originX
torsoB.y = torsoA.y + (torsoA.height * 0.5) + spacing
torsoB:setFillColor (255, 255, 255, 128)
ragdoll:insert (torsoB)
local torsoC = display.newRect( 0, 0, 30, 24 )
torsoC.x = originX
torsoC.y = torsoB.y + (torsoB.height * 0.5) + spacing
torsoC:setFillColor (255, 255, 255, 128)
ragdoll:insert (torsoC)
local pelvis = display.newRect( 0, 0, 30, 24 )
pelvis.x = originX
pelvis.y = torsoC.y + (torsoC.height * 0.5) + spacing
pelvis:setFillColor (255, 255, 255, 128)
ragdoll:insert (pelvis)
local leftLegA = display.newRect( 0, 0, 12, 52.5 )
leftLegA.x = pelvis.x - ((pelvis.width - leftLegA.width) * 0.5)
leftLegA.y = pelvis.y + (leftLegA.height * 0.5) + spacing
leftLegA:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftLegA)
local rightLegA = display.newRect( 0, 0, 12, 52.5 )
rightLegA.x = pelvis.x + ((pelvis.width - rightLegA.width) * 0.5)
rightLegA.y = pelvis.y + (rightLegA.height * 0.5) + spacing
rightLegA:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightLegA)
local leftLegB = display.newRect( 0, 0, 12, 45 )
leftLegB.x = leftLegA.x
leftLegB.y = leftLegA.y + rightLegA.height - 12
leftLegB:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftLegB)
local rightLegB = display.newRect( 0, 0, 12, 45 )
rightLegB.x = rightLegA.x
rightLegB.y = rightLegA.y + rightLegA.height - 12
rightLegB:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightLegB)
local leftArmA = display.newRect( 125, 70, 10.5, 39 )
leftArmA.x = torsoA.x - (torsoA.width * 0.5) - 3
leftArmA.y = torsoA.y + (leftArmA.height * 0.5) - 6
leftArmA:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftArmA)
local rightArmA = display.newRect( 185, 70, 10.5, 39 )
rightArmA.x = torsoA.x + (torsoA.width * 0.5) + 3
rightArmA.y = torsoA.y + (rightArmA.height * 0.5) - 6
rightArmA:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightArmA)
local leftArmB = display.newRect( 125, 105, 10.5, 37.5 )
leftArmB.x = leftArmA.x
leftArmB.y = leftArmA.y + (leftArmA.height) - 6
leftArmB:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftArmB)
local rightArmB = display.newRect( 185, 105, 10.5, 37.5 )
rightArmB.x = rightArmA.x
rightArmB.y = rightArmA.y + (rightArmA.height) - 6
rightArmB:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightArmB)
physics.addBody (head, {bounce = 0.0, friction = 1.0})
physics.addBody (torsoA, {bounce = 0.0, friction = 1.0})
physics.addBody (torsoB, {bounce = 0.0, friction = 1.0})
physics.addBody (torsoC, {bounce = 0.0, friction = 1.0})
physics.addBody (pelvis, {bounce = 0.0, friction = 1.0})
physics.addBody (leftLegA, {bounce = 0.0, friction = 1.0})
physics.addBody (rightLegA, {bounce = 0.0, friction = 1.0})
physics.addBody (leftLegB, {bounce = 0.0, friction = 1.0})
physics.addBody (rightLegB, {bounce = 0.0, friction = 1.0})
physics.addBody (leftArmA, {bounce = 0.0, friction = 1.0})
physics.addBody (rightArmA, {bounce = 0.0, friction = 1.0})
physics.addBody (leftArmB, {bounce = 0.0, friction = 1.0})
physics.addBody (rightArmB, {bounce = 0.0, friction = 1.0})
local neckJoint = physics.newJoint ( “pivot”, head, torsoA, torsoA.x, torsoA.y)
neckJoint.isLimitEnabled = true
neckJoint:setRotationLimits ( -22.5, 22.5 )
local backboneA = physics.newJoint ( “pivot”, torsoA, torsoB, torsoB.x, torsoB.y )
backboneA.isLimitEnabled = true
backboneA:setRotationLimits ( -22.5, 22.5 )
local backboneB = physics.newJoint ( “pivot”, torsoB, torsoC, torsoC.x, torsoC.y )
backboneB.isLimitEnabled = true
backboneB:setRotationLimits ( -22.5, 22.5 )
local backboneC = physics.newJoint ( “pivot”, torsoC, pelvis, pelvis.x, pelvis.y )
backboneC.isLimitEnabled = true
backboneC:setRotationLimits ( -22.5, 22.5 )
local leftHip = physics.newJoint ( “pivot”, pelvis, leftLegA, leftLegA.x, pelvis.y )
leftHip.isLimitEnabled = true
leftHip:setRotationLimits ( -45, 90 )
local rightHip = physics.newJoint ( “pivot”, pelvis, rightLegA, rightLegA.x, pelvis.y )
rightHip.isLimitEnabled = true
rightHip:setRotationLimits ( -90, 45 )
local leftKnee = physics.newJoint ( “pivot”, leftLegA, leftLegB, leftLegB.x, leftLegA.y + (leftLegA.height * 0.5) - 6 )
leftKnee.isLimitEnabled = true
leftKnee:setRotationLimits ( -45, 90 )
local rightKnee = physics.newJoint ( “pivot”, rightLegA, rightLegB, rightLegB.x, rightLegA.y + (rightLegA.height * 0.5) - 6 )
rightKnee.isLimitEnabled = true
rightKnee:setRotationLimits ( -90, 45 )
local leftShoulder = physics.newJoint ( “pivot”, torsoA, leftArmA, leftArmA.x, torsoA.y )
leftShoulder.isLimitEnabled = true
leftShoulder:setRotationLimits ( 0, 180 )
local rightShoulder = physics.newJoint ( “pivot”, torsoA, rightArmA, rightArmA.x, torsoA.y )
rightShoulder.isLimitEnabled = true
rightShoulder:setRotationLimits ( -180, 0 )
local leftElbow = physics.newJoint ( “pivot”, leftArmA, leftArmB, leftArmB.x, leftArmA.y + (leftArmA.height * 0.5) - 6 )
leftElbow.isLimitEnabled = true
leftElbow:setRotationLimits ( -45, 90 )
local rightElbow = physics.newJoint ( “pivot”, rightArmA, rightArmB, rightArmB.x, rightArmA.y + (rightArmA.height * 0.5) - 6 )
rightElbow.isLimitEnabled = true
rightElbow:setRotationLimits ( -90, 45 )
local function dragBody( event )
gameUI.dragBody( event )
end
head:addEventListener ( “touch”, dragBody )
leftLegA:addEventListener ( “touch”, dragBody )
leftLegB:addEventListener ( “touch”, dragBody )
rightLegA:addEventListener ( “touch”, dragBody )
rightLegB:addEventListener ( “touch”, dragBody )
leftArmA:addEventListener ( “touch”, dragBody )
leftArmB:addEventListener ( “touch”, dragBody )
rightArmA:addEventListener ( “touch”, dragBody )
rightArmB:addEventListener ( “touch”, dragBody )[/lua] [import]uid: 10747 topic_id: 3194 reply_id: 10120[/import]
Nice work!
Here’s a simple way to bundle it into a module. Firstly, the calling code in main.lua:
require "ragdoll"
--\> Setup Display
display.setStatusBar (display.HiddenStatusBar)
system.activate ("multitouch")
local walls = ragdoll.createWalls()
local doll1 = ragdoll.newRagDoll(40, 320)
local doll2 = ragdoll.newRagDoll(280, 320)
And here’s ragdoll.lua (all your code of course):
[code]
module(…, package.seeall)
local gameUI = require(“gameUI”)
–> Start Physics
local physics = require (“physics”)
physics.start ()
physics.setGravity (0, 10)
–physics.setDrawMode (“hybrid”)
function createWalls()
–> Create Walls
local walls = display.newGroup()
local leftWall = display.newRect (0, 0, 1, display.contentHeight)
local rightWall = display.newRect (display.contentWidth, 0, 1, display.contentHeight)
local ceiling = display.newRect (0, 0, display.contentWidth, 1)
local floor = display.newRect (0, display.contentHeight, display.contentWidth, 1)
physics.addBody (leftWall, “static”, {bounce = 0.0, friction = 10})
physics.addBody (rightWall, “static”, {bounce = 0.0, friction = 10})
physics.addBody (ceiling, “static”, {bounce = 0.0, friction = 10})
physics.addBody (floor, “static”, {bounce = 0.0, friction = 10})
walls:insert(leftWall)
walls:insert(rightWall)
walls:insert(ceiling)
walls:insert(floor)
return walls
end
function newRagDoll(originX, originY)
–> Create Ragdoll Group
local spacing = 1
local ragdoll = display.newGroup ()
local head = display.newCircle( 0, 0, 15 )
–local head = display.newImage( “head.png” )
head.x = originX
head.y = originY
head:setFillColor (255, 255, 255, 128)
ragdoll:insert (head)
local torsoA = display.newRect( 0, 0, 45, 24 )
torsoA.x = originX
torsoA.y = originY + head.height
torsoA:setFillColor (255, 255, 255, 128)
ragdoll:insert (torsoA)
local torsoB = display.newRect( 0, 0, 37.5, 24 )
torsoB.x = originX
torsoB.y = torsoA.y + (torsoA.height * 0.5) + spacing
torsoB:setFillColor (255, 255, 255, 128)
ragdoll:insert (torsoB)
local torsoC = display.newRect( 0, 0, 30, 24 )
torsoC.x = originX
torsoC.y = torsoB.y + (torsoB.height * 0.5) + spacing
torsoC:setFillColor (255, 255, 255, 128)
ragdoll:insert (torsoC)
local pelvis = display.newRect( 0, 0, 30, 24 )
pelvis.x = originX
pelvis.y = torsoC.y + (torsoC.height * 0.5) + spacing
pelvis:setFillColor (255, 255, 255, 128)
ragdoll:insert (pelvis)
local leftLegA = display.newRect( 0, 0, 12, 52.5 )
leftLegA.x = pelvis.x - ((pelvis.width - leftLegA.width) * 0.5)
leftLegA.y = pelvis.y + (leftLegA.height * 0.5) + spacing
leftLegA:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftLegA)
local rightLegA = display.newRect( 0, 0, 12, 52.5 )
rightLegA.x = pelvis.x + ((pelvis.width - rightLegA.width) * 0.5)
rightLegA.y = pelvis.y + (rightLegA.height * 0.5) + spacing
rightLegA:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightLegA)
local leftLegB = display.newRect( 0, 0, 12, 45 )
leftLegB.x = leftLegA.x
leftLegB.y = leftLegA.y + rightLegA.height - 12
leftLegB:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftLegB)
local rightLegB = display.newRect( 0, 0, 12, 45 )
rightLegB.x = rightLegA.x
rightLegB.y = rightLegA.y + rightLegA.height - 12
rightLegB:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightLegB)
local leftArmA = display.newRect( 125, 70, 10.5, 39 )
leftArmA.x = torsoA.x - (torsoA.width * 0.5) - 3
leftArmA.y = torsoA.y + (leftArmA.height * 0.5) - 6
leftArmA:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftArmA)
local rightArmA = display.newRect( 185, 70, 10.5, 39 )
rightArmA.x = torsoA.x + (torsoA.width * 0.5) + 3
rightArmA.y = torsoA.y + (rightArmA.height * 0.5) - 6
rightArmA:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightArmA)
local leftArmB = display.newRect( 125, 105, 10.5, 37.5 )
leftArmB.x = leftArmA.x
leftArmB.y = leftArmA.y + (leftArmA.height) - 6
leftArmB:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftArmB)
local rightArmB = display.newRect( 185, 105, 10.5, 37.5 )
rightArmB.x = rightArmA.x
rightArmB.y = rightArmA.y + (rightArmA.height) - 6
rightArmB:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightArmB)
physics.addBody (head, {bounce = 0.0, friction = 1.0})
physics.addBody (torsoA, {bounce = 0.0, friction = 1.0})
physics.addBody (torsoB, {bounce = 0.0, friction = 1.0})
physics.addBody (torsoC, {bounce = 0.0, friction = 1.0})
physics.addBody (pelvis, {bounce = 0.0, friction = 1.0})
physics.addBody (leftLegA, {bounce = 0.0, friction = 1.0})
physics.addBody (rightLegA, {bounce = 0.0, friction = 1.0})
physics.addBody (leftLegB, {bounce = 0.0, friction = 1.0})
physics.addBody (rightLegB, {bounce = 0.0, friction = 1.0})
physics.addBody (leftArmA, {bounce = 0.0, friction = 1.0})
physics.addBody (rightArmA, {bounce = 0.0, friction = 1.0})
physics.addBody (leftArmB, {bounce = 0.0, friction = 1.0})
physics.addBody (rightArmB, {bounce = 0.0, friction = 1.0})
local neckJoint = physics.newJoint ( “pivot”, head, torsoA, torsoA.x, torsoA.y)
neckJoint.isLimitEnabled = true
neckJoint:setRotationLimits ( -22.5, 22.5 )
local backboneA = physics.newJoint ( “pivot”, torsoA, torsoB, torsoB.x, torsoB.y )
backboneA.isLimitEnabled = true
backboneA:setRotationLimits ( -22.5, 22.5 )
local backboneB = physics.newJoint ( “pivot”, torsoB, torsoC, torsoC.x, torsoC.y )
backboneB.isLimitEnabled = true
backboneB:setRotationLimits ( -22.5, 22.5 )
local backboneC = physics.newJoint ( “pivot”, torsoC, pelvis, pelvis.x, pelvis.y )
backboneC.isLimitEnabled = true
backboneC:setRotationLimits ( -22.5, 22.5 )
local leftHip = physics.newJoint ( “pivot”, pelvis, leftLegA, leftLegA.x, pelvis.y )
leftHip.isLimitEnabled = true
leftHip:setRotationLimits ( -45, 90 )
local rightHip = physics.newJoint ( “pivot”, pelvis, rightLegA, rightLegA.x, pelvis.y )
rightHip.isLimitEnabled = true
rightHip:setRotationLimits ( -90, 45 )
local leftKnee = physics.newJoint ( “pivot”, leftLegA, leftLegB, leftLegB.x, leftLegA.y + (leftLegA.height * 0.5) - 6 )
leftKnee.isLimitEnabled = true
leftKnee:setRotationLimits ( -45, 90 )
local rightKnee = physics.newJoint ( “pivot”, rightLegA, rightLegB, rightLegB.x, rightLegA.y + (rightLegA.height * 0.5) - 6 )
rightKnee.isLimitEnabled = true
rightKnee:setRotationLimits ( -90, 45 )
local leftShoulder = physics.newJoint ( “pivot”, torsoA, leftArmA, leftArmA.x, torsoA.y )
leftShoulder.isLimitEnabled = true
leftShoulder:setRotationLimits ( 0, 180 )
local rightShoulder = physics.newJoint ( “pivot”, torsoA, rightArmA, rightArmA.x, torsoA.y )
rightShoulder.isLimitEnabled = true
rightShoulder:setRotationLimits ( -180, 0 )
local leftElbow = physics.newJoint ( “pivot”, leftArmA, leftArmB, leftArmB.x, leftArmA.y + (leftArmA.height * 0.5) - 6 )
leftElbow.isLimitEnabled = true
leftElbow:setRotationLimits ( -45, 90 )
local rightElbow = physics.newJoint ( “pivot”, rightArmA, rightArmB, rightArmB.x, rightArmA.y + (rightArmA.height * 0.5) - 6 )
rightElbow.isLimitEnabled = true
rightElbow:setRotationLimits ( -90, 45 )
function ragdoll:touch( event )
gameUI.dragBody( event )
end
head:addEventListener ( “touch”, ragdoll )
leftLegA:addEventListener ( “touch”, ragdoll )
leftLegB:addEventListener ( “touch”, ragdoll )
rightLegA:addEventListener ( “touch”, ragdoll )
rightLegB:addEventListener ( “touch”, ragdoll )
leftArmA:addEventListener ( “touch”, ragdoll )
leftArmB:addEventListener ( “touch”, ragdoll )
rightArmA:addEventListener ( “touch”, ragdoll )
rightArmB:addEventListener ( “touch”, ragdoll )
return ragdoll
end
[/code] [import]uid: 3953 topic_id: 3194 reply_id: 10198[/import]
Really very cool. Thanks for sharing! [import]uid: 8196 topic_id: 3194 reply_id: 10227[/import]
Wow this is great! Thank you MarkHenryC, going to play a bit more with this today. [import]uid: 10747 topic_id: 3194 reply_id: 10275[/import]
I’m wondering how we might add dampening to the joints so there’s not so much jiggle/twitchiness (so when you drop one, you don’t see it continuing to animate).
Also, if I wanted to use this to animate a stuffed animal, where the hinges feel less mechanical (and lubricated), how would I change this? For example, right now if you pick one up by the head, it tends to swing back and forth for a long time. Can friction be added to the joint?
I ended up adding touch listeners to every body part… made it easy to just pick it up at any point. I also added ‘return true’ at the end of the touch function… seemed to make it more stable. [import]uid: 9905 topic_id: 3194 reply_id: 10294[/import]
I was just looking around a bit in the docs and it doesn’t seem as though you can control the angularDamping of a joint. You can control this on a body but unfortunately this has no effect once a joint has been applied.
Not sure if there is a work-around for this. [import]uid: 10747 topic_id: 3194 reply_id: 10302[/import]
I see something called a friction joint, but it seems to break the program if I use it.
http://developer.anscamobile.com/content/friction-joint
I tried replacing
local neckJoint = physics.newJoint ( "pivot", head, torsoA, torsoA.x, torsoA.y) with
local neckJoint = physics.newJoint ( "friction", head, torsoA, torsoA.x, torsoA.y) and I get an error:
Runtime error: ...ev/Corona/Corona Game SampleCode/RagDoll/ragdoll.lua:139: attempt to call method 'setRotationLimits' (a string value)
stack traceback:
[C]: in function 'setRotationLimits'
...ev/Corona/Corona Game SampleCode/RagDoll/ragdoll.lua:139: in function 'newRagDoll'
...e Dev/Corona/Corona Game SampleCode/RagDoll/main.lua:9: in main chunk and commenting out the setRotationLimits line just makes the heads fall off.
Maybe this isn’t actually implemented? Or I’m misunderstanding its use. From the documentation, it seems that rotation limits isn’t supported by this, but even without limits, it still seems to not work.
I also see something called myJoint.dampingRatio for ‘distance’ joints. But this also doesn’t support rotation limits, which I think you’d want for a rag doll.
[import]uid: 9905 topic_id: 3194 reply_id: 10309[/import]
@ridiculous (nice sensible name that): now we have a bunch of Gumbies!
[code]
module(…, package.seeall)
local gameUI = require(“gameUI”)
–> Start Physics
local physics = require (“physics”)
physics.start ()
physics.setGravity (0, 10)
–physics.setDrawMode (“hybrid”)
function createWalls()
–> Create Walls
local walls = display.newGroup()
local leftWall = display.newRect (0, 0, 1, display.contentHeight)
local rightWall = display.newRect (display.contentWidth, 0, 1, display.contentHeight)
local ceiling = display.newRect (0, 0, display.contentWidth, 1)
local floor = display.newRect (0, display.contentHeight, display.contentWidth, 1)
physics.addBody (leftWall, “static”, {bounce = 0.0, friction = 10})
physics.addBody (rightWall, “static”, {bounce = 0.0, friction = 10})
physics.addBody (ceiling, “static”, {bounce = 0.0, friction = 10})
physics.addBody (floor, “static”, {bounce = 0.0, friction = 10})
walls:insert(leftWall)
walls:insert(rightWall)
walls:insert(ceiling)
walls:insert(floor)
return walls
end
function newRagDoll(originX, originY)
–> Create Ragdoll Group
local spacing = 1
local ragdoll = display.newGroup ()
local head = display.newCircle( 0, 0, 15 )
–local head = display.newImage( “head.png” )
head.x = originX
head.y = originY
head:setFillColor (255, 255, 255, 128)
ragdoll:insert (head)
local torsoA = display.newRect( 0, 0, 45, 24 )
torsoA.x = originX
torsoA.y = originY + head.height
torsoA:setFillColor (255, 255, 255, 128)
ragdoll:insert (torsoA)
local torsoB = display.newRect( 0, 0, 37.5, 24 )
torsoB.x = originX
torsoB.y = torsoA.y + (torsoA.height * 0.5) + spacing
torsoB:setFillColor (255, 255, 255, 128)
ragdoll:insert (torsoB)
local torsoC = display.newRect( 0, 0, 30, 24 )
torsoC.x = originX
torsoC.y = torsoB.y + (torsoB.height * 0.5) + spacing
torsoC:setFillColor (255, 255, 255, 128)
ragdoll:insert (torsoC)
local pelvis = display.newRect( 0, 0, 30, 24 )
pelvis.x = originX
pelvis.y = torsoC.y + (torsoC.height * 0.5) + spacing
pelvis:setFillColor (255, 255, 255, 128)
ragdoll:insert (pelvis)
local leftLegA = display.newRect( 0, 0, 12, 52.5 )
leftLegA.x = pelvis.x - ((pelvis.width - leftLegA.width) * 0.5)
leftLegA.y = pelvis.y + (leftLegA.height * 0.5) + spacing
leftLegA:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftLegA)
local rightLegA = display.newRect( 0, 0, 12, 52.5 )
rightLegA.x = pelvis.x + ((pelvis.width - rightLegA.width) * 0.5)
rightLegA.y = pelvis.y + (rightLegA.height * 0.5) + spacing
rightLegA:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightLegA)
local leftLegB = display.newRect( 0, 0, 12, 45 )
leftLegB.x = leftLegA.x
leftLegB.y = leftLegA.y + rightLegA.height - 12
leftLegB:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftLegB)
local rightLegB = display.newRect( 0, 0, 12, 45 )
rightLegB.x = rightLegA.x
rightLegB.y = rightLegA.y + rightLegA.height - 12
rightLegB:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightLegB)
local leftArmA = display.newRect( 125, 70, 10.5, 39 )
leftArmA.x = torsoA.x - (torsoA.width * 0.5) - 3
leftArmA.y = torsoA.y + (leftArmA.height * 0.5) - 6
leftArmA:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftArmA)
local rightArmA = display.newRect( 185, 70, 10.5, 39 )
rightArmA.x = torsoA.x + (torsoA.width * 0.5) + 3
rightArmA.y = torsoA.y + (rightArmA.height * 0.5) - 6
rightArmA:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightArmA)
local leftArmB = display.newRect( 125, 105, 10.5, 37.5 )
leftArmB.x = leftArmA.x
leftArmB.y = leftArmA.y + (leftArmA.height) - 6
leftArmB:setFillColor (255, 255, 255, 128)
ragdoll:insert (leftArmB)
local rightArmB = display.newRect( 185, 105, 10.5, 37.5 )
rightArmB.x = rightArmA.x
rightArmB.y = rightArmA.y + (rightArmA.height) - 6
rightArmB:setFillColor (255, 255, 255, 128)
ragdoll:insert (rightArmB)
physics.addBody (head, {bounce = 0.0, friction = 1.0})
physics.addBody (torsoA, {bounce = 0.0, friction = 1.0})
physics.addBody (torsoB, {bounce = 0.0, friction = 1.0})
physics.addBody (torsoC, {bounce = 0.0, friction = 1.0})
physics.addBody (pelvis, {bounce = 0.0, friction = 1.0})
physics.addBody (leftLegA, {bounce = 0.0, friction = 1.0})
physics.addBody (rightLegA, {bounce = 0.0, friction = 1.0})
physics.addBody (leftLegB, {bounce = 0.0, friction = 1.0})
physics.addBody (rightLegB, {bounce = 0.0, friction = 1.0})
physics.addBody (leftArmA, {bounce = 0.0, friction = 1.0})
physics.addBody (rightArmA, {bounce = 0.0, friction = 1.0})
physics.addBody (leftArmB, {bounce = 0.0, friction = 1.0})
physics.addBody (rightArmB, {bounce = 0.0, friction = 1.0})
function ragdoll:addFrictionJoint(a, b, posX, posY, rFrom, rTo, mT)
local j = physics.newJoint ( “pivot”, a, b, posX, posY, rFrom, rTo)
j.isLimitEnabled = true
j:setRotationLimits (rFrom, rTo)
j.isMotorEnabled = true
j.motorSpeed = 0
j.maxMotorTorque = mT or 1
return j
end
– neck
ragdoll:addFrictionJoint(head, torsoA, torsoA.x, torsoA.y, -22.5, 22.5)
– backboneA
ragdoll:addFrictionJoint(torsoA, torsoB, torsoB.x, torsoB.y, -22.5, 22.5)
– backboneB
ragdoll:addFrictionJoint(torsoB, torsoC, torsoC.x, torsoC.y, -22.5, 22.5)
– backboneC
ragdoll:addFrictionJoint(torsoC, pelvis, pelvis.x, pelvis.y, -22.5, 22.5)
– leftHip
ragdoll:addFrictionJoint(pelvis, leftLegA, leftLegA.x, pelvis.y, -45, 90)
– rightHip
ragdoll:addFrictionJoint(pelvis, rightLegA, rightLegA.x, pelvis.y, -90, 45)
– leftKnee
ragdoll:addFrictionJoint(leftLegA, leftLegB, leftLegB.x,
leftLegA.y + leftLegA.height * 0.5 - 6, -45, 90)
– rightKnee
ragdoll:addFrictionJoint(rightLegA, rightLegB, rightLegB.x,
rightLegA.y + rightLegA.height * 0.5 - 6, -90, 45)
– leftShoulder
ragdoll:addFrictionJoint(torsoA, leftArmA, leftArmA.x, torsoA.y, 0, 180)
– rightShoulder
ragdoll:addFrictionJoint(torsoA, rightArmA, rightArmA.x, torsoA.y, -180, 0)
– leftElbow
ragdoll:addFrictionJoint(leftArmA, leftArmB, leftArmB.x, leftArmA.y +
leftArmA.height * 0.5 - 6, -45, 90)
– rightElbow
ragdoll:addFrictionJoint(rightArmA, rightArmB, rightArmB.x, rightArmA.y +
rightArmA.height * 0.5 - 6, -90, 45)
function ragdoll:touch( event )
gameUI.dragBody( event )
end
head:addEventListener ( “touch”, ragdoll )
leftLegA:addEventListener ( “touch”, ragdoll )
leftLegB:addEventListener ( “touch”, ragdoll )
rightLegA:addEventListener ( “touch”, ragdoll )
rightLegB:addEventListener ( “touch”, ragdoll )
leftArmA:addEventListener ( “touch”, ragdoll )
leftArmB:addEventListener ( “touch”, ragdoll )
rightArmA:addEventListener ( “touch”, ragdoll )
rightArmB:addEventListener ( “touch”, ragdoll )
return ragdoll
end
[/code] [import]uid: 3953 topic_id: 3194 reply_id: 10326[/import]
I see what you mean. According to the docs, friction joints are a type of pivot joint but clearly they’re not as they don’t support setRotationLimits(). And they don’t seem to behave properly either. You can pull them off the join point.
Unless Ansca can provide working example, it might be worth posting to the bug database.
Meanwhile, this is the Box2D way of doing friction, which seems to work OK. Add these properties to create resistance:
leftElbow.isMotorEnabled = true
leftElbow.motorSpeed = 0
leftElbow.maxMotorTorque = 100
[import]uid: 3953 topic_id: 3194 reply_id: 10323[/import]
What fun!!! That’s awesome!
Now we have battling action figures. Very cool, may I ask where you found the information about using motors to create resistance?
I can see I’ve now opened up a can of worms here, I’m supposed to be working in Flash but I’m afraid Corona will be taking up much of my time from now on 
[import]uid: 10747 topic_id: 3194 reply_id: 10327[/import]
Nice, Mark!
I found that using a very small value for maxMotorTorque seems to do what I wanted. With values like .05 or .005, it gets rid of a lot of the twitchiness.
Also, I posted the friction joint question into the bug database.
[import]uid: 9905 topic_id: 3194 reply_id: 10331[/import]
@ridiculous: I checked the Box2D docs. Good luck tearing yourself away from physics sims.
@David: thanks, that’s useful info. [import]uid: 3953 topic_id: 3194 reply_id: 10335[/import]
it’s not working…
i copied and pasted the code in my main.lua and ragdoll.lua, and all i get is a black screen.
What am i doing wrong? [import]uid: 10542 topic_id: 3194 reply_id: 10436[/import]
Make sure you find the gameUI.lua file somewhere and put it in with the other two.
That’s one thing I’d like to see – all those Lua files that are needed for different things all in one spot. As it is I find myself scanning through the sample code folders trying to find them as I realize I need them.
The other thing to do is run it from the terminal-based simulator, that way you can see whatever error message is being produced.
Jay
[import]uid: 9440 topic_id: 3194 reply_id: 10460[/import]
thanks Jay, It worked [import]uid: 10542 topic_id: 3194 reply_id: 10469[/import]
Jay, I’d like to see that too… or maybe some sort of path environment setup so that the compiler first looks in the local directory for the file, and if it’s not there, looks in your designated lua library directory(s). [import]uid: 9905 topic_id: 3194 reply_id: 10495[/import]
Perhaps the files could be bundled in with the install? And imported directly from the app install dir? [import]uid: 10747 topic_id: 3194 reply_id: 10498[/import]
This is fantastic! I’m playing with it now. I’ve got a question if anyone else can help figure this out.
How the heck can you get the current X & Y coordinates of the component pieces or the group as a whole?
I’m running the code from above and it’s making it’s way on the screen and it’s touchable and moveable… but the code I’m using to try and access the parts of the whole are unavailable.
[lua]r = newRagdoll
print ( r.x ) – Outputs 0
print ( r.head.x ) – Outputs "[string “return (r.head.x)”]:1: attempt to index field ‘head’ (a nil value)
"[/lua]
Anyone see what I’m missing here?
EDIT - this seems to work.
[lua] function ragdoll:touch( event )
gameUI.dragBody( event )
print (event.target.x)
end[/lua]
Edit 2 - grr… still need to access it from everywhere, not just the event.
I wish I understood how to access variables. Tips and links to tutorials are welcome! [import]uid: 14327 topic_id: 3194 reply_id: 18113[/import]