attaching an entity to a bone?

Blitz3D Forums/Blitz3D Beginners Area/attaching an entity to a bone?

coffeeaddict

(Posted 2011) [#1]

Is it possible to attach entities to bones in a model's hierarchy? I've searched in the forums and the documentation and can't find an example.

What I want to do is make a swinging light- by attaching a light entity to the end bone of an animated rope/cable. The end effect I am looking for is that when a FPS player shoots a hanging light fixture the fixture and the light start swaying around together. Is such a thing possible with this engine?

Warner

(Posted 2011) [#2]

Yes, you should first find out what the name of the bone is:

Graphics3D 800, 600, 0, 2
SetBuffer BackBuffer()

mesh = LoadAnimMesh("model with bones.b3d")
printoutchildren(mesh)
WaitKey
End

Function printoutchildren(mesh, t%=0)
 d$ ="" For c = 0 To t*4 d$ = d$ + " " Next
 Print d$ + EntityName(mesh)
 For i = 1 To CountChildren(mesh)
    printoutchildren(GetChild(mesh, i), t+1)
 Next
End Function

After that, use this name to get the bone using FindChild.
Then attach something to it using EntityParent.

bone = FindChild(model, "box01")
sphere = createsphere()
entityparent sphere, bone
positionentity sphere, 0, 0, 0

If you attach something to a bone, the child will be deformed by the parents matrix: it will follow it's scale, rotation and position.

Last edited 2011

jfk EO-11110

(Posted 2011) [#3]

you may be able to prevent scaling etc. of the sword when you unparent it while you are scaling the character.