Плазменная заливка формы

unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics,
Controls, Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormPaint(Sender: TObject);
private
{ Private declarations }
plasma: array [0..768, 0..768] of byte;
procedure makeplasma;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.FormPaint(Sender: TObject);
var
x, y: integer;
begin
makeplasma;
for x := 0 to 255 do
begin
for y := 0 to 255 do
begin
Form1.Canvas.Pixels[x, y] := rgb(plasma[x, y],
plasma[x + 256, y + 256], plasma[x + 512, y + 512]);
end;
Form1.update;
end;
end;
procedure TForm1.makeplasma;
procedure halfway(x1,y1,x2,y2: integer);
procedure adjust(xa,ya,x,y,xb,yb: integer);
var
d: integer;
v: double;
begin
if plasma[x,y]<>0 then
exit;
d:=Abs(xa-xb)+Abs(ya-yb);
v:=(plasma[xa,ya]+plasma[xb,yb])/2+(random-0.5)*d*2;
if v<1 then
v:=1;
if v>=193 then
v:=192;
plasma[x,y]:=Trunc(v);
end;
var
x, y: integer;
v: double;
begin
if (x2-x1<2) and (y2-y1<2) then
exit;
x:=(x1+x2) div 2;
y:=(y1+y2) div 2;
adjust(x1,y1,x,y1,x2,y1);
adjust(x2,y1,x2,y,x2,y2);
adjust(x1,y2,x,y2,x2,y2);
adjust(x1,y1,x1,y,x1,y2);
if plasma[x,y]=0 then
begin
v:=(plasma[x1,y1]+plasma[x2,y1]+plasma[x2,y2]+plasma[x1,y2])/4;
plasma[x,y]:=Trunc(v);
end;
halfway(x1,y1,x,y);
halfway(x,y1,x2,y);
halfway(x,y,x2,y2);
halfway(x1,y,x,y2);
end;
var
x, y: integer ;
begin
randomize;
plasma[0,768]:=random(192);
plasma[768,768]:=random(192);
plasma[768,0]:=random(192);
plasma[0,0]:=random(192);
halfway(0,0,768,768);
end;
end.