keeping your backround while clearing something infront ofit

[DanceMacabre]

Now then. I've drawn a grid as a backround, and I want the player to control the square while I still have a grid drawn in the backround. The problem is (To my knowledge anyway) I cannot Draw.Cls my box unless I want to get rid of the backround aswell. I want to keep the backround when I Draw.Cls my square. The problem I face is I don't know how to do that! Any help is appreciated. Heres my code:

code:

var gridx : int := 0 var gridy : int := maxy var space : int := Pic.FileNew ("space.jpg") var paranoids : int := Pic.FileNew ("paranoids.jpg") var x : int := 52 var y : int := 42 var sx : int := 350 var sy : int := 350 var charpress : array char of boolean var enter : char var fontid := Font.New ("ZapfHumnst BT:40x25") var cursorx : int := 60 var cursory : int := 102 var key : string (1) := "" View.Set ("graphics") drawfillbox (0, 0, maxx, maxy, black) loop     delay (50)     drawfillbox (gridx, 0, gridx - 1, maxy, brightblue)     gridx := gridx + 25     exit when gridx > maxx end loop gridx := 0 loop     delay (50)     drawfillbox (0, gridy, maxx, gridy - 1, brightblue)     gridy := gridy - 25     exit when gridy < 0 end loop Music.Play ("d") drawfillbox (0, 0, 10, maxy, black) delay (500) Music.Play ("d") drawfillbox (maxx - 10, 0, maxx, maxy, black) delay (500) Music.Play ("d") drawfillbox (0, maxy, maxx, maxy - 5, black) delay (500) Music.Play ("d") drawfillbox (0, 5, maxx, 0, black) delay (1000) Music.Play ("a") Pic.Draw (space, 11, maxy - 47, picMerge) delay (200) Music.Play ("a") Pic.Draw (paranoids, 11, maxy - 88, picMerge) delay (1000) Draw.FillBox (195, 195, 504, 303, black) for z : 199 .. 500     delay (1)     Draw.Box (z, 199, 500, 299, blue) end for Font.Draw ("PLAY", 225, 235, fontid, brightblue) % Draw.FillBox(,,,,black) Draw.FillBox (15, 46, 319, 154, black) for decreasing z : 315 .. 19     delay (1)     Draw.Box (19, 50, z, 150, blue) end for Font.Draw ("QUIT", 100, 87, fontid, brightblue) %*************************************************% %++++++++++++++draw the characters++++++++++++++++% %*************************************************% var keys : array char of boolean View.Set ("graphics,offscreenonly") var x1, y1 : int := 0 const size : int := 5 y1 := maxy - size cls loop     Draw.FillBox (0, 0, maxx, maxy, black)     drawfillbox (gridx, 0, gridx - 1, maxy, brightblue)     gridx := gridx + 25     delay (50)     drawfillbox (0, gridy, maxx, gridy - 1, brightblue)     gridy := gridy - 25     loop         Input.KeyDown (keys)         if keys (KEY_DOWN_ARROW) then             loop                 y1 -= 1                 Draw.Cls                 Draw.FillBox (x1, y1, x1 + size, y1 + size, brightred)                 View.Update                 exit when hasch             end loop         end if         if keys (KEY_RIGHT_ARROW) then             loop                 x1 += 1                 Draw.Cls                 Draw.FillBox (x1, y1, x1 + size, y1 + size, brightred)                 View.Update                 exit when hasch             end loop         end if         if keys (KEY_LEFT_ARROW) then %%%             loop                 x1 -= 1                 Draw.Cls                 Draw.FillBox (x1, y1, x1 + size, y1 + size, brightred)                 View.Update                 exit when hasch             end loop         end if         if keys (KEY_UP_ARROW) then %%%             loop                 y1 += 1                 Draw.Cls                 Draw.FillBox (x1, y1, x1 + size, y1 + size, brightred)                 View.Update                 exit when hasch             end loop         end if     end loop end loop

[HellblazerX]

I guess the only way to do this is to replace the Draw.Cls command with a procedure of your own that will draw the background instead of clearing the screen. There's no way you can set the cls command to draw your background.

[codemage]

If you're on version 4.1, there's a View.UpdateArea command that should be able to just update your player without having to reflash the whole screen.

[[Gandalf]]

codemage wrote:

If you're on version 4.1, there's a View.UpdateArea command

I'm pretty sure View.UpdateArea was also available for Turing 4.0.5.

Problems like this are generally solved by redrawing the entire screen at each iteration of your main loop, background and all.

[Bored]

Also if your on a version of Turing supporting Sprites (I beleive 4.1 and 4.0.3 or below) you can create a sprite for the picture you are drawing over the background and simply hide it, show it, and move it when needed all without affecting you background.