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unit Unit1;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, Forms, Controls, Graphics, Dialogs, StdCtrls, ExtCtrls,
Math;
type
Molecule = record
X, Y: Integer;
Vx, Vy: Integer;
end;
{ TForm1 }
TForm1 = class(TForm)
Cold: TLabel;
Warm: TLabel;
StartStopBtn: TButton;
Screen: TPaintBox;
procedure ScreenPaint(Sender: TObject);
procedure StartStopBtnClick(Sender: TObject);
private
public
end;
var
Form1: TForm1;
IsRunning: Boolean = false;
implementation
{$R *.lfm}
procedure TForm1.ScreenPaint(Sender: TObject);
begin
end;
procedure TForm1.StartStopBtnClick(Sender: TObject);
const RMolecule: Integer = 10; { Радиус молекулы }
const RHole: Integer = 15;
const V: Integer = 7; { Скорость молекулы }
const N = 20; { Количество молекул }
var angle: Real; { Угол, задающий начальное направление полета }
i: Integer; { Счетчик цикла }
Mol: array[1..N * 2] of Molecule; { Массив молекул }
CurV: Integer; { Выбранаая случайная скорость молекулы }
halfScreen: Integer;
T1, T2: Integer; { Температуры и количество, статистика }
begin
if IsRunning then
begin
IsRunning := false;
StartStopBtn.Caption := 'Пуск';
Exit;
end;
StartStopBtn.Caption := 'Стоп';
IsRunning := true;
Randomize;
Screen.Refresh;
halfScreen := Screen.Width div 2;
T1 := V * N;
T2 := V * N;
for i := 1 to N * 2 do { Цикл по все молекулам }
begin
{ Выбор начального положения молекулы }
if i <= N then
begin
Mol[i].X := RandomRange(RMolecule, halfScreen - RMolecule);
end
else
begin
Mol[i].X := RandomRange(halfScreen + RMolecule,
Screen.Width - RMolecule);
end;
Mol[i].Y := RandomRange(RMolecule, Screen.Height - RMolecule);
{ Выбор нправления и скорости молекулы (1 - V) }
angle := Random(360) * Pi / 180;
CurV := RandomRange(1, V);
Mol[i].Vx := Round(CurV * Sin(angle)); { Получение составляющих }
Mol[i].Vy := Round(CurV * Cos(angle)); { скорости молекулы }
end;
while IsRunning do { Основной цикл }
begin
{ Черчение перегородки }
Screen.Canvas.Line(halfScreen, 0, halfScreen,
Screen.Height div 2 - RHole - RMolecule);
Screen.Canvas.Line(halfScreen, Screen.Height div 2 + RHole + RMolecule,
halfScreen, Screen.Height);
for i := 1 to N * 2 do { Цикл по всем молекулам }
begin
Screen.Canvas.Pen.Color := clBtnFace;
Screen.Canvas.Ellipse(Mol[i].X - RMolecule, Mol[i].Y - RMolecule,
Mol[i].X + RMolecule, Mol[i].Y + RMolecule);
{ Сдвигаем на новую позицию }
Mol[i].X := Mol[i].X + Mol[i].Vx;
Mol[i].Y := Mol[i].Y + Mol[i].Vy;
if (Mol[i].X > halfScreen - RMolecule) and
(Mol[i].X - Mol[i].Vx <= halfScreen - RMolecule) then
begin
if (Mol[i].Y >= Screen.Height div 2 - RHole) and
(Mol[i].Y <= Screen.Height div 2 + RHole) then
begin
T1 := T1 - V; T2 := T2 + V;
end
else
begin
Mol[i].X := halfScreen - RMolecule;
Mol[i].Vx := -Mol[i].Vx;
end;
end
else if (Mol[i].X < halfScreen + RMolecule) and
(Mol[i].X - Mol[i].Vx >= halfScreen + RMolecule) then
begin
if (Mol[i].Y >= Screen.Height div 2 - RHole) and
(Mol[i].Y <= Screen.Height div 2 + RHole) then
begin
T2 := T2 - V;
T1 := T1 + V;
end
else
begin
Mol[i].X := halfScreen + RMolecule;
Mol[i].Vx := -Mol[i].Vx;
end;
end;
{ Определяем, не вышла ли молекула за границы аквариума }
if Mol[i].X > Screen.Width - RMolecule then
begin
Mol[i].X := Screen.Width - RMolecule;
Mol[i].Vx := -Mol[i].Vx;
end;
if Mol[i].X < RMolecule then
begin
Mol[i].X := RMolecule;
Mol[i].Vx := -Mol[i].Vx;
end;
if Mol[i].Y > Screen.Height - RMolecule then
begin
Mol[i].Y := Screen.Height - RMolecule;
Mol[i].Vy := -Mol[i].Vy;
end;
if Mol[i].Y < RMolecule then
begin
Mol[i].Y := RMolecule;
Mol[i].Vy := -Mol[i].Vy;
end;
Cold.Caption := IntToStr(T1);
Warm.Caption := IntToStr(T2);
Screen.Canvas.Pen.Color := clBlue; { Рисуем молекулу на новой }
Screen.Canvas.Ellipse(Mol[i].X - RMolecule, Mol[i].Y - RMolecule, { позиции }
Mol[i].X + RMolecule, Mol[i].Y + RMolecule);
end;
Sleep(10); { Пауза на 10 миллисекунд }
Application.ProcessMessages;
end;
end;
end.
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