; WorldAssetReady Example
; -----------------------
; Requires Extended mode.

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

camera=CreateCamera()
PositionEntity camera,0,1,-5
light=CreateLight()
RotateEntity light,45,45,0

; A plain crate that will receive its texture once the asset is ready
crate=CreateCube()
PositionEntity crate,0,1,0

; Load the asset manifest world in the background
manifest=LoadWorldAsync("../../../samples/worlds/asset-preload.world")
While Not WorldReady(manifest)
    If WorldLoadState(manifest)=WORLD_LOAD_FAILED Then RuntimeError WorldLoadError(manifest)
    Cls
    Text 0,0,"Loading the asset manifest..."
    Flip
Wend

; 'manual-texture' uses manual loading policy: resolving the handle
; starts its background preparation
asset=FindWorldAsset(manifest,"manual-texture")
tex=0

While Not KeyDown(1)

    If WorldAssetError(asset)<>"" Then RuntimeError WorldAssetError(asset)

    ; The moment WorldAssetReady reports true, use the asset
    If tex=0 And WorldAssetReady(asset)
        tex=WorldAssetTexture(asset)
        EntityTexture crate,tex
    EndIf

    TurnEntity crate,0,1,0

    ; 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,"Arrow keys: move camera   Esc: exit"
    Text 0,20,"WorldAssetReady(asset) = "+WorldAssetReady(asset)
    If tex Then Text 0,40,"The crate wears the texture that just became ready"

    Flip

Wend

If tex Then FreeTexture tex
FreeWorld manifest
End