; BrushEnvironmentMap Example
; ---------------------------
; Requires Extended mode.

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

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

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

; Draw a tiny 2:1 equirectangular environment: sky, horizon and sun
environment=CreateTexture(64,32,1+8+32)
SetBuffer TextureBuffer(environment)
ClsColor 30,80,180
Cls
Color 255,160,60
Rect 0,16,64,16,True
Color 255,240,180
Oval 44,4,8,8,True
SetBuffer BackBuffer()

; A smooth metal sphere reflects the environment strongly
brush=CreateStandardBrush(220,220,220)
BrushPBR brush,1,0.15
sphere=CreateSphere(32)

strength#=1.0

While Not KeyDown(1)

    ; Press [ / ] to change the environment lighting strength
    If KeyDown(26) And strength>0 Then strength=strength-0.02
    If KeyDown(27) And strength<3 Then strength=strength+0.02

    ; Light the sphere from the image and repaint it
    BrushEnvironmentMap brush,environment,0,strength
    PaintEntity sphere,brush

    ; 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

    Color 255,255,255
    Text 0,0,"[ / ] : strength   Arrow keys: move camera   Esc: exit"
    Text 0,20,"BrushEnvironmentMap brush,environment,0,"+strength

    Flip

Wend

FreeBrush brush
End