; CreateSkyBox Example
; --------------------
; Requires Extended mode.

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

camera=CreateCamera()
PositionEntity camera,0,1,-5

light=CreateLight()
RotateEntity light,35,-30,0

; Draw a tiny 2:1 equirectangular sky: gradient, horizon and sun
sky_texture=CreateTexture(128,64,1+8+32)
SetBuffer TextureBuffer(sky_texture)
For y=0 To 63
    Color 30+y*2,80+y,180+y
    Line 0,y,127,y
Next
Color 255,235,150
Oval 90,8,14,14,True
SetBuffer BackBuffer()

; Wrap the image around the whole scene
sky=CreateSkyBox(sky_texture)

; A ground slab shows that the sky sits behind everything
ground=CreateCube()
ScaleEntity ground,4,0.1,4
PositionEntity ground,0,-1,2
EntityColor ground,60,110,50

While Not KeyDown(1)

    ; Drift the sky slowly - a skybox rotates like any entity
    TurnEntity sky,0,0.03,0

    ; Arrow keys move the camera - look around to see the sky follow
    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

    Color 255,255,255
    Text 0,0,"Arrow keys: move camera   Esc: exit"
    Text 0,20,"sky=CreateSkyBox(sky_texture)   The sky follows the camera"

    Flip

Wend

End