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| unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, StdCtrls;
type
TForm1 = class(TForm)
ColorBox1: TColorBox;
Timer1: TTimer;
procedure FormCreate(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
ball=class
R,x1,y1,dx,dy,Number:integer;
Col:Tcolor;
procedure XPYP(c:Tcanvas);
procedure XMYM(c:Tcanvas);
procedure XPYM(c:Tcanvas);
procedure XMYP(c:Tcanvas);
constructor Create;
end;
const
Nmax=100;
var
Form1: TForm1;
a:array [1..Nmax] of ball;
Xmax,Ymax:integer;
implementation
{$R *.dfm}
constructor ball.Create;
begin
x1:=random(xmax);
y1:=random(ymax);
dx:=1+random(5);
dy:=1+random(5);
r:=10+random(50);
col:=Form1.ColorBox1.Colors[3+random(20)]
end;
procedure ball.XPYP (c:Tcanvas);
begin
C.Brush.Color:=Form1.Color;
C.Pen.Color:=Form1.Color;
C.Ellipse(x1,y1,x1+r,y1+r);
x1:=x1+dx;
y1:=y1+dy;
if (x1+r>xmax)and (y1+r>ymax) then
begin
Number:=3;
exit;
end;
if (x1+r>xmax)and (y1+r<ymax) then
begin
Number:=2;
exit;
end;
if (x1+r<xmax)and (y1+r>ymax) then
begin
Number:=1;
exit;
end;
C.Brush.Color:=Col;
C.Ellipse(x1,y1,x1+r,y1+r)
end;
procedure ball.XPYM (c:Tcanvas);
begin
C.Brush.Color:=Form1.Color;
C.Pen.Color:=Form1.Color;
C.Ellipse(x1,y1,x1+r,y1+r);
x1:=x1+dx;
y1:=y1-dy;
if (x1+r>xmax)and (y1-1>0) then
begin
Number:=3;
exit;
end;
if (x1+r>xmax)and (y1-1<0) then
begin
Number:=2;
exit;
end;
if (x1+r<xmax)and (y1-1<0) then
begin
Number:=0;
exit;
end;
C.Brush.Color:=Col;
C.Ellipse(x1,y1,x1+r,y1+r)
end;
procedure ball.XMYM (c:Tcanvas);
begin
C.Brush.Color:=Form1.Color;
C.Pen.Color:=Form1.Color;
C.Ellipse(x1,y1,x1+r,y1+r);
x1:=x1-dx;
y1:=y1-dy;
if (x1-1<0)and (y1-1<0) then
begin
Number:=0;
exit;
end;
if (x1-1>0)and (y1-1<0) then
begin
Number:=2;
exit;
end;
if (x1-1<0)and (y1-1>0) then
begin
Number:=1;
exit;
end;
C.Brush.Color:=Col;
C.Ellipse(x1,y1,x1+r,y1+r)
end;
procedure ball.XMYP (c:Tcanvas);
begin
C.Brush.Color:=Form1.Color;
C.Pen.Color:=Form1.Color;
C.Ellipse(x1,y1,x1+r,y1+r);
x1:=x1-dx;
y1:=y1+dy;
if (x1-1>0)and (y1+r>ymax) then
begin
Number:=3;
exit;
end;
if (x1-1<0)and (y1+r>ymax) then
begin
Number:=1;
exit;
end;
if (x1-1<0)and (y1+r<ymax) then
begin
Number:=0;
exit;
end;
C.Brush.Color:=Col;
C.Ellipse(x1,y1,x1+r,y1+r)
end;
procedure TForm1.FormCreate(Sender: TObject);
var
i:integer;
begin
Xmax:=Form1.Width;
Ymax:=Form1.Height;
for i:=1 to Nmax do
a[i]:=ball.Create;
Timer1.Interval:=1;
end;
procedure TForm1.Timer1Timer(Sender: TObject);
VAR
i:integer;
begin
for i:=1 to Nmax do
begin
case a[i].Number of
0:a[i].XPYP(Form1.Canvas);
1:a[i].XPYM(Form1.Canvas);
2:a[i].XMYP(Form1.Canvas);
3:a[i].XMYM(Form1.Canvas);
end;
end;
end;
Procedure TShape;
begin
end;
end. |
(
