; DecalSize Example
; -----------------
; Requires Extended mode.

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

camera=CreateCamera()
PositionEntity camera,0,0,-6

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

; A wall with a thin pillar sticking out in front of it
wall=CreateCube()
ScaleEntity wall,4,2.5,0.2
PositionEntity wall,0,0,3
EntityColor wall,110,120,135

pillar=CreateCube()
ScaleEntity pillar,0.3,2.5,0.3
PositionEntity pillar,0,0,2.4
EntityColor pillar,150,110,70

; Paint an orange splat texture in memory
splat=CreateTexture(64,64,3)
SetBuffer TextureBuffer(splat)
ClsColor 0,0,0
Cls
Color 255,80,20
Oval 6,6,52,52,True
SetBuffer BackBuffer()
Color 255,255,255

; One decal that slides back and forth across the wall
decal=CreateDecal(splat)

size#=1
depth#=0.25

While Not KeyDown(1)

    ; [ and ] change the size, D cycles the projection depth
    If KeyHit(26) And size>0.25 Then size=size-0.25
    If KeyHit(27) And size<3 Then size=size+0.25
    If KeyHit(32) Then
        depth=depth*2
        If depth>2 Then depth=0.25
    EndIf

    ; DecalSize sets width, height and how far the decal projects
    DecalSize decal,size,size,depth

    ; Slide the projector across the wall - a big depth also reaches the pillar
    angle#=angle+1.5
    PositionEntity decal,3*Sin(angle),0,2.2

    ; 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   [ / ] : size   D: depth   Esc: exit"
    Text 0,20,"DecalSize decal,"+size+","+size+","+depth
    Text 0,40,"Depth "+depth+" decides whether the splat reaches the wall behind the pillar"

    Flip

Wend

End