; EntityParent Example
; --------------------

Graphics3D 640,480,0,2
SetBuffer BackBuffer()

camera=CreateCamera()
PositionEntity camera,0,6,-10
RotateEntity camera,25,0,0

light=CreateLight()
RotateEntity light,45,45,0

; A truck that drives in a circle
truck=CreateCube()
ScaleMesh truck,1,0.5,1.5
EntityColor truck,0,150,255
PositionEntity truck,4,0,0

; A crate sitting in the middle of the yard
crate=CreateCube()
ScaleMesh crate,0.5,0.5,0.5
EntityColor crate,0,255,0

attached=0

While Not KeyDown(1)

    ; Space toggles the crate's parent between the truck and none
    If KeyHit(57)
        If attached
            ; Parent 0 releases the crate; it keeps its global position
            EntityParent crate,0
            attached=0
        Else
            ; Attach the crate: from now on it moves with the truck
            EntityParent crate,truck
            attached=1
        EndIf
    EndIf

    ; Drive the truck in a circle
    TurnEntity truck,0,1,0
    MoveEntity truck,0,0,0.08

    ; Arrow keys move the camera
    If KeyDown(200) Then MoveEntity camera,0,0,0.1
    If KeyDown(208) Then MoveEntity camera,0,0,-0.1
    If KeyDown(203) Then TurnEntity camera,0,1,0
    If KeyDown(205) Then TurnEntity camera,0,-1,0

    RenderWorld

    Text 0,0,"Space: attach/release the green crate   Arrow keys: move camera   Esc: exit"
    If attached
        Text 0,20,"EntityParent crate,truck - the crate moves with the truck"
    Else
        Text 0,20,"EntityParent crate,0 - the crate is released where it is"
    EndIf

    Flip

Wend

End