How to Do Ragdolls

[Ace1024]

Hi, I'm new to the community but i have been using leadwerks for a while.

 

Anyway, how would you create ragdolls using Newton physics?

 

The problem that I've been having is that when I attach bodies together with joints, the bodies still seem to move together unless a force (that isn't gravity) is applied to one of the bodies. Then, the body that the force is applied to rotates independently from the other body while still being connected.

[Canardia]

It's impossible to tell what you have done, without an example.

Post a small example how you have setup the ragdoll.

[Ace1024]

Sorry,

 

I am attaching the .bmx code that I was using.

I apologize for the redundancy for a lot of the code, i just like to see it all when i try something new.

 

Framework leadwerks.engine

RegisterAbstractPath AppDir

Graphics(800,600)

If Not CreateWorld()
Notify "Failed to create world.",1
End
EndIf

pivot:tentity=createpivot()
positionentity pivot,vec3(0)

Local cam:TCamera=CreateCamera(pivot)
MoveEntity cam,vec3(0,0,-7)

Local gbuffer:TBuffer
gbuffer=CreateBuffer(800,600,BUFFER_COLOR|BUFFER_DEPTH|BUFFER_NORMAL) 

Collisions 1,1,True

Global player:Tmesh=Loadmesh("Models\Player\Player 13.gmf")
positionentity player,Vec3(0,-3,0)
scaleentity player,Vec3(1)
'animate(player,1)
createragdoll(player)
entityparent player,pbody

Local ground:TBody=CreateBodyBox(20,0.1,20)
PositionEntity ground,vec3(0,-6,0)
EntityType ground,1

Local ground2:TBody=CreateBodyBox(40,0.1,40)
PositionEntity ground2,vec3(0,-8,0)
EntityType ground2,1

Local groundtwo=CreateBodybox(10)
ScaleEntity groundtwo,vec3(1,0.1,1)
rotateentity groundtwo,vec3(5,0,0)
PositionEntity groundtwo,vec3(0,-6,0)
EntityType groundtwo,1

Local groundthree=CreateBodybox(10)
ScaleEntity groundthree,vec3(0.1,40,40)
PositionEntity groundthree,vec3(-20,0,0)
EntityType groundthree,1

Local groundmesh:TMesh=CreateCube()
ScaleEntity groundmesh,vec3(20,0.1,20)
positionentity groundmesh,vec3(0,-5,0)
EntityParent groundmesh,ground,0
material=CreateMaterial()
SetMaterialColor material,vec4(0,1,1,1)
PaintEntity groundmesh,material

Local mark:tmesh=createsphere()
scaleentity mark,vec3(.25,.25,.25)
positionentity mark,vec3(0,1.25,-1)

Local light:TLight=CreateDirectionalLight()
RotateEntity light,vec3(35,55)

While Not KeyHit(KEY_ESCAPE) Or AppTerminate()

If KeyDown(KEY_RIGHT)
turnentity pivot,vec3(0,5,0)
EndIf

If KeyDown(KEY_LEFT)
turnentity pivot,vec3(0,-5,0)
EndIf

If KeyDown(KEY_UP)
moveentity cam,vec3(0,0,1)
EndIf

If KeyDown(KEY_DOWN)
moveentity cam,vec3(0,0,-1)
EndIf

If KeyDown(KEY_W)
moveentity cam,vec3(0,1,0)
EndIf

If KeyDown(KEY_S)
moveentity cam,vec3(0,-1,0)
EndIf

If KeyHit(KEY_SPACE)
AddBodyForce(torsop,Vec3(0,1000,1000),0)' apply force
End If

If KeyHit(KEY_1)
debugphysics(0)
EndIf

If KeyHit(KEY_2)
debugphysics(1)
EndIf

UpdateWorld()
SetBuffer gbuffer	
RenderWorld()
SetBuffer BackBuffer()
RenderLights(gbuffer)
Flip()	
Wend

End

Function CreateRagDoll(ragdollmesh:tentity)

Global ppos:TVec3
ppos=EntityPosition(ragdollmesh)

head:Tentity=FindChild(ragdollmesh,"Head")
headpos:tvec3=entityposition(head)

Global torso:Tentity=FindChild(ragdollmesh,"Armature.001")
Global torsopos:tvec3=entityposition(torso)

rightshoulder:tentity=FindChild(ragdollmesh,"Shoulder.R")
rightshoulderpos:tvec3=entityposition(rightshoulder)

leftshoulder:tentity=FindChild(ragdollmesh,"Shoulder.L")
leftshoulderpos:tvec3=entityposition(leftshoulder)

rightbicep:tentity=FindChild(ragdollmesh,"Bicep.R")
rightbiceppos:tvec3=entityposition(rightbicep)

leftbicep:tentity=FindChild(ragdollmesh,"Bicep.L")
leftbiceppos:tvec3=entityposition(leftbicep)

rightforearm:tentity=FindChild(ragdollmesh,"Forearm.R")
rightforearmpos:tvec3=entityposition(rightforearm)

leftforearm:tentity=FindChild(ragdollmesh,"Forearm.L")
leftforearmpos:tvec3=entityposition(leftforearm)

righthip:tentity=FindChild(ragdollmesh,"Hip.R")
righthippos:tvec3=entityposition(righthip)

lefthip:tentity=FindChild(ragdollmesh,"Hip.L")
lefthippos:tvec3=entityposition(lefthip)

rightleg:tentity=FindChild(ragdollmesh,"Thigh.R")
rightlegpos:tvec3=entityposition(rightleg)

leftleg:tentity=FindChild(ragdollmesh,"Thigh.L")
leftlegpos:tvec3=entityposition(leftleg)

rightcalf:tentity=FindChild(ragdollmesh,"Calf.R")
rightcalfpos:tvec3=entityposition(rightcalf)

leftcalf:tentity=FindChild(ragdollmesh,"Calf.L")
leftcalfpos:tvec3=entityposition(leftcalf)


headp:tbody=createbodysphere(.35)
positionentity headp,vec3(ppos.x+0,ppos.y+3+2,ppos.z+0)
setbodymass headp,1.0
entitytype headp,1
entityparent head,headp
setbodymass headp,1
SetBodyElasticity headp,0

Global torsop:tbody=createbodybox(1,1.5,.5)
positionentity torsop,vec3(0,ppos.y+3+.75,0)
setbodymass torsop,1.0
entitytype torsop,1
entityparent torso,torsop
setbodymass torsop,1
SetBodyElasticity torsop,0

rightshoulderp:tbody=createbodysphere(.125)
positionentity rightshoulderp,vec3(ppos.x+.675,ppos.y+3+1.25,ppos.z+0)
setbodymass rightshoulderp,1.0
entitytype rightshoulderp,1
entityparent rightshoulder,rightshoulderp
setbodymass rightshoulderp,1
SetBodyElasticity rightshoulderp,0

leftshoulderp:tbody=createbodysphere(.125)
positionentity leftshoulderp,vec3(ppos.x+-.675,ppos.y+3+1.25,ppos.z+0)
setbodymass leftshoulderp,1.0
entitytype leftshoulderp,1
entityparent leftshoulder,leftshoulderp
setbodymass leftshoulderp,1
SetBodyElasticity leftshoulderp,0

rightbicepp:tbody=createbodybox(.25,.5,.25)
rotateentity rightbicepp,vec3(0,0,10)
positionentity rightbicepp,vec3(ppos.x+.675,ppos.y+3+.75,ppos.z+0)
setbodymass rightbicepp,1.0
entitytype rightbicepp,1
entityparent rightbicep,rightbicepp
SetBodyElasticity rightbicepp,.1
setbodymass rightbicepp,1
SetBodyElasticity rightbicepp,0

leftbicepp:tbody=createbodybox(.25,.5,.25)
rotateentity leftbicepp,vec3(0,0,-10)
positionentity leftbicepp,vec3(ppos.x+-.675,ppos.y+3+.75,ppos.z+0)
setbodymass leftbicepp,1.0
entitytype leftbicepp,1
entityparent leftbicep,leftbicepp
SetBodyElasticity leftbicepp,.1
setbodymass leftbicepp,1
SetBodyElasticity leftbicepp,0

rightforearmp:tbody=createbodybox(.25,.5,.25)
rotateentity rightforearmp,vec3(0,0,10)
positionentity rightforearmp,vec3(ppos.x+.75,ppos.y+3+-.25,ppos.z+0)
setbodymass rightforearmp,1.0
entitytype rightforearmp,1
entityparent rightforearm,rightforearmp
SetBodyElasticity rightforearmp,.1
setbodymass rightforearmp,1
SetBodyElasticity rightforearmp,0

leftforearmp:tbody=createbodybox(.25,.5,.25)
rotateentity leftforearmp,vec3(0,0,-10)
positionentity leftforearmp,vec3(ppos.x+-.75,ppos.y+3+-.25,ppos.z+0)
setbodymass leftforearmp,1.0
entitytype leftforearmp,1
entityparent leftforearm,leftforearmp
SetBodyElasticity leftforearmp,.1
setbodymass leftforearmp,1
SetBodyElasticity leftforearmp,0


righthipp:tbody=createbodysphere(.25)
positionentity righthipp,vec3(ppos.x+.25,ppos.y+3+-.25,ppos.z+0)
setbodymass righthipp,1.0
entitytype righthipp,1
entityparent righthip,righthipp
setbodymass righthipp,1
SetBodyElasticity righthipp,0

lefthipp:tbody=createbodysphere(.25)
positionentity lefthipp,vec3(ppos.x+-.25,ppos.y+3+-.25,ppos.z+0)
setbodymass lefthipp,1.0
entitytype lefthipp,1
entityparent lefthip,lefthipp
setbodymass lefthipp,1
SetBodyElasticity lefthipp,0

rightlegp:tbody=createbodybox(.5,1,.5)
positionentity rightlegp,vec3(ppos.x+.25,ppos.y+3+-1,ppos.z+0)
setbodymass rightlegp,1.0
entitytype rightlegp,1
entityparent rightleg,rightlegp
setbodymass rightlegp,1
SetBodyElasticity rightlegp,0

leftlegp:tbody=createbodybox(.5,1,.5)
positionentity leftlegp,vec3(ppos.x+-.25,ppos.y+3+-1,ppos.z+0)
setbodymass leftlegp,1.0
entitytype leftlegp,1
entityparent leftleg,leftlegp
setbodymass leftlegp,1
SetBodyElasticity leftlegp,0

rightcalfp:tbody=createbodybox(.5,1,.5)
positionentity rightcalfp,vec3(ppos.x+.25,ppos.y+3+-2.5,ppos.z+0)
setbodymass rightcalfp,1.0
entitytype rightcalfp,1
entityparent rightcalf,rightcalfp
setbodymass rightcalfp,1
SetBodyElasticity rightcalfp,0

leftcalfp:tbody=createbodybox(.5,1,.5)
positionentity leftcalfp,vec3(ppos.x+-.25,ppos.y+3+-2.5,ppos.z+0)
setbodymass leftcalfp,1.0
entitytype leftcalfp,1
entityparent leftcalf,leftcalfp
setbodymass leftcalfp,1
SetBodyElasticity leftcalfp,0

headtorsojoint:tjoint=createjointball(headp,torsop,vec3(ppos.x+0,ppos.y+3+1.25,ppos.z+-.01))

rightshouldertorsojoint:tjoint=createjointball(rightshoulderp,torsop,vec3(ppos.x+.675,ppos.y+3+1.25,ppos.z+0))
leftshouldertorsojoint:tjoint=createjointball(leftshoulderp,torsop,vec3(ppos.x+-.675,ppos.y+3+1.25,ppos.z+0))

rightbicepshoulderjoint:tjoint=createjointfixed(rightshoulderp,rightbicepp,vec3(ppos.x+.675,ppos.y+3+1.25,ppos.z+0))
leftbicepshoulderjoint:tjoint=createjointfixed(leftshoulderp,leftbicepp,vec3(ppos.x+-.675,ppos.y+3+1.25,ppos.z+0))

rightforearmbicepjoint:tjoint=createjointball(rightbicepp,rightforearmp,vec3(ppos.x+.675,ppos.y+3+.25,ppos.z+0))
leftforearmbicepjoint:tjoint=createjointball(leftbicepp,leftforearmp,vec3(ppos.x+-.675,ppos.y+3+.25,ppos.z+0))

righthiptorsojoint:tjoint=createjointfixed(righthipp,torsop,vec3(ppos.x+0,ppos.y+3+1.25,ppos.z+0))
lefthiptorsojoint:tjoint=createjointfixed(lefthipp,torsop,vec3(ppos.x+0,ppos.y+3+1.25,ppos.z+0))

rightleghipjoint:tjoint=createjointball(righthipp,rightlegp,vec3(ppos.x+.25,ppos.y+3+-.30,ppos.z+0))
leftleghipjoint:tjoint=createjointball(lefthipp,leftlegp,vec3(ppos.x+.25,ppos.y+3+-.30,ppos.z+0))

rightcalflegjoint:tjoint=createjointball(rightlegp,rightcalfp,vec3(ppos.x+.25,ppos.y+3+-1.75,ppos.z+0))
leftcalflegjoint:tjoint=createjointball(leftlegp,leftcalfp,vec3(ppos.x+.25,ppos.y+3+-1.75,ppos.z+0))

EndFunction

 

Basically, all that I'm doing is placing a joint in between two bodies. However, as all of the bodies of the ragdoll get connected, the ragdoll basically functions as one big body and the joints just seem to "glue" the bodies together.