# BackBuffer()

# Parameters

None.

# Description

This is a value usually used with SETBUFFER to denote the secondary non-visible drawing buffer called the Back Buffer. In MOST gaming situations, you will want to be using the BackBuffer() for drawing operations then using Flip to bring that buffer to the FrontBuffer() where it can be seen. There are other uses for the command, but this is the biggie. See SETBUFFER for more info, and check out the example. Once again - if you set drawing operations to the BackBuffer() you will NOT see any of them until you call FLIP.

# Example

; Flip/Backbuffer()/Rect Example
; Set Graphics Mode
Graphics 640,480
; Go double buffering
SetBuffer BackBuffer()
; Setup initial locations for the box
box_x = -20 ; negative so it will start OFF screen
box_y = 100
While Not KeyHit(1)
Cls ; Always clear screen first
Rect box_x,box_y,20,20,1 ; Draw the box in the current x,y location
Flip ; Flip it into view
box_x = box_x + 1 ; Move the box over one pixel
If box_x = 640 Then box_x=-20 ; If it leaves the Right edge, reset its x location
Wend

Index
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