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|
uses
WinCrt, WinGraph, WinMouse;
const
cBallDiameter = 33;
cPaddleWidth = 65;
cPaddleHeight = 16;
cPaddleAreaHeight = 32;
cBallAreaHeight = 481;
cPaddleY = cBallAreaHeight;
cScreenWidth = 321;
cScreenHeight = cBallAreaHeight + cPaddleAreaHeight;
cMinPaddleCenterX = cPaddleWidth div 2;
cMaxPaddleCenterX = Pred(cScreenWidth) - cPaddleWidth div 2;
var
vBitmap: pointer;
vBallX, vBallY: integer;
vMoveX, vMoveY: integer;
vPaddleCenterX: integer;
vGameOver: boolean;
procedure LoadImage;
var
vSize: longint;
vFile: file;
begin
vSize := ImageSize(1, 1, cBallDiameter, cBallDiameter);
GetMem(vBitmap, vSize);
{$I-}
Assign(vFile, 'balle.bmp');
Reset(vFile, 1);
{$I+}
if (IOResult = 0) and (FileSize(vFile) = vSize) then
begin
BlockRead(vFile, vBitmap^, vSize);
Close(vFile);
end;
end;
procedure FreeImage;
begin
FreeMem(vBitmap);
end;
function PaddleStartX: integer;
begin
result := vPaddleCenterX - cPaddleWidth div 2;
end;
function PaddleEndX: integer;
begin
result := vPaddleCenterX + cPaddleWidth div 2;
end;
procedure SetBallPosition;
var
vBallCenterX: integer;
begin
vBallCenterX := vBallX + cBallDiameter div 2;
if (vBallX + vMoveX < 0) or (vBallX + vMoveX > cScreenWidth - cBallDiameter) then
vMoveX := -vMoveX;
if (vBallY + vMoveY < 0) then
vMoveY := -vMoveY
else
if (vBallY + vMoveY > cBallAreaHeight - cBallDiameter) then
if (vBallCenterX >= PaddleStartX) and (vBallCenterX <= PaddleEndX) then
vMoveY := -vMoveY
else
vGameOver := true;
Inc(vBallX, vMoveX);
Inc(vBallY, vMoveY);
end;
procedure DrawBall;
begin
PutImage(vBallX, vBallY, vBitmap^, OrPut);
end;
procedure EraseBall;
begin
SetFillStyle(SolidFill, Black);
Bar(vBallX, vBallY, Pred(vBallX + cBallDiameter), Pred(vBallY + cBallDiameter));
end;
procedure SetPaddlePosition;
var
x: integer;
begin
x := GetMouseX;
if x < cMinPaddleCenterX then
vPaddleCenterX := cMinPaddleCenterX
else
if x > cMaxPaddleCenterX then
vPaddleCenterX := cMaxPaddleCenterX
else
vPaddleCenterX := x;
end;
procedure DrawPaddle;
begin
SetFillStyle(SolidFill, White);
Bar(PaddleStartX, cPaddleY, PaddleEndX, Pred(cPaddleY + cPaddleHeight));
end;
procedure ErasePaddle;
begin
SetFillStyle(SolidFill, Black);
Bar(0, cPaddleY, Pred(cScreenWidth), Pred(cPaddleY + cPaddleHeight));
end;
procedure CreateWindow;
var
vDriver, vMode: smallint;
begin
vDriver := NoPalette;
vMode := mCustom;
SetWindowSize(cScreenWidth, cScreenHeight);
InitGraph(vDriver, vMode, 'WinGraph Pong');
end;
begin
vBallX := 32;
vBallY := 32;
vMoveX := 4;
vMoveY := 4;
vPaddleCenterX := cScreenWidth div 2;
vGameOver := false;
CreateWindow;
LoadImage;
DrawBall;
DrawPaddle;
UpdateGraph(UpdateOff);
SetMouseXY(vPaddleCenterX, cPaddleY);
Delay(1000);
repeat
Delay(1);
ErasePaddle;
SetPaddlePosition;
DrawPaddle;
EraseBall;
SetBallPosition;
DrawBall;
UpdateGraph(UpdateNow);
until KeyPressed or vGameOver;
if vGameOver then
Delay(2000);
FreeImage;
CloseGraph;
end. |
