Godot Version
4.3 Stable
Question
In Godot 3.4 I had a method to edit my skeleton - not it’s animated poses, but it’s rest or base pose. When I made my character taller I could edit the skeleton and the animations would still work.
E.g. same mesh, different height, works fine
In Godot 4 my code appears to do nothing.
Does anyone know how to achieve this? I make the character taller with blend shapes, but currently I’m creating a monster if I use any non-rest pose.
Extra info:
This is my code that doesn’t work in Godot 4 - the only changes in updating it from 3 were:
-BoneAttachment → BoneAttachment3D
-Spatial →Node3D
-Added ‘boneAttachment.on_skeleton_update()’, as I noticed BoneAttachment3D didn’t get it’s position when first attached.
func updateSkeleton():
anim.play("apose")#same as rest, no posing at all
anim.advance(1)
var numBones = skeleton.get_bone_count()
for boneToUpdate in numBones:
var boneName = skeleton.get_bone_name(boneToUpdate)
if boneName == "Base":
pass
else:
var jointName = getJointNameFromBoneName(boneName)
var desiredLocation = get_node("bonesGLB").getBlendShapedPositionOfBone(jointName)
moveBoneToGlobal(desiredLocation,boneToUpdate)
fixSkins()
anim.play("apose")#set it back to previous animation if desired
anim.advance(1)
func moveBoneToGlobal(pos,boneNum):
var parentNum = skeleton.get_bone_parent(boneNum)
if parentNum==-1:#no parent, root bone, never moves in this
pass
else:
var parentBoneAttachment = BoneAttachment3D.new()
parentBoneAttachment.bone_name = skeleton.get_bone_name(parentNum)
skeleton.add_child(parentBoneAttachment)
parentBoneAttachment.on_skeleton_update()#this makes it updates its position to the skeleton
var boneTrans = skeleton.get_bone_rest(boneNum)
var s = Node3D.new()
s.transform = boneTrans
parentBoneAttachment.add_child(s)
s.global_transform.origin = pos
skeleton.set_bone_rest(boneNum,s.transform)
parentBoneAttachment.remove_child(s)
s.queue_free()
skeleton.remove_child(parentBoneAttachment)
parentBoneAttachment.queue_free()
func fixSkins():
var skin = base.skin#base = MeshInstance3D
var numBinds = skin.get_bind_count()
for n in range(numBinds):
var bindName = skin.get_bind_name(n)
var boneIndexInSkel = skeleton.find_bone(bindName)
var gp = skeleton.get_bone_global_pose(boneIndexInSkel)
var gpi = gp.inverse()
skin.set_bind_pose(n,gpi)
This was a struggle for me to make in Godot 3, I ended up using BoneAttachments to calculate the transform for me. In Godot 3 I was editing the mesh directly, not using blend shapes. I’m hoping that won’t matter.
I have tested extensively to check the ‘desiredPosition’ is correct, and have confirmed it using MeshInstances:
(Tall character with spheres placed at the desired bone locations)
I am using a similar technique to view the results of the bones, this time red cubes, but they don’t move:
