; CreateLineList Example
; ----------------------
; Requires Extended mode.

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

camera=CreateCamera()
PositionEntity camera,0,4,-10

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

; CreateLineList makes a retained line entity - here an editor-style floor grid
lines=CreateLineList()
EntityColor lines,30,180,255
LineWidth lines,2
For c=-4 To 4
    AddLine lines,c,0,-4,c,0,4
    AddLine lines,-4,0,c,4,0,c
Next

; A ball bouncing on the grid so the scene lives
ball=CreateSphere()
ScaleEntity ball,0.5,0.5,0.5
EntityColor ball,255,210,40

While Not KeyDown(1)

    ; Bounce the ball across the grid
    angle#=angle+2
    PositionEntity ball,2*Sin(angle*0.7),0.5+Abs(2*Sin(angle)),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,"The grid is one line-list entity holding "+CountLines(lines)+" segments"
    Text 0,40,"Line width stays constant however close the camera gets"

    Flip

Wend

End