Я решил написать змейку и заметил, что компилятор иногда игнорирует очевидные ошибки. Тогда мой код компилируется, но дальше белого окна не работает. Версия 3.8.2, сборка 3063. Мой код:
uses GraphAbc, Timers;
const SCREEN_WIDTH = 640;
const SCREEN_HEIGHT = 480;
const MAX_FPS = 60;
const WORLD_WIDTH = 48;
const WORLD_HEIGHT = 36;
const START_CELLS_AMOUNT = 4;
const FOOD_AMOUNT = 6;
const SKIP_STEPS = true;
const BACKGROUND = clDarkGray;
const SNAKE_COLOR = clGray;
const FOOD_COLOR = RGB(20, 70, 180);
var snakeX: array of integer;
var snakeY: array of integer;
var dir: integer;
var foodX: array of integer;
var foodY: array of integer;
var timer: Timers.Timer;
function generateFood(): (integer, integer);
begin
var x: integer;
var y: integer;
while true do
begin
x := Random(WORLD_WIDTH);
y := Random(WORLD_HEIGHT);
var cont := false;
for var i := 0 to snakeX.Length - 1 do
begin
if (snakeX[i] = x) and (snakeY[i] = y) then
begin
cont := true;
break;
end;
end;
if cont then continue;
for var i := 0 to FOOD_AMOUNT - 1 do
begin
if (foodX[i] = x) and (foodY[i] = y) then
begin
cont := true;
continue;
end;
end;
if not cont then break;
end;
generateFood := (x, y);
end;
procedure KeyDown(Key: integer);
begin
case Key of
VK_Up: dir := 0;
VK_Right: dir := 1;
VK_Down: dir := 2;
VK_Left: dir := 3;
end;
end;
procedure PaintCell(coords: (integer, integer); col: color);
begin
SetBrushColor(col);
FillRectangle(
Ceil(coords[0] * SCREEN_WIDTH / WORLD_WIDTH),
Ceil(coords[1] * SCREEN_HEIGHT / WORLD_HEIGHT),
Ceil((coords[0] + 1) * SCREEN_WIDTH / WORLD_WIDTH),
Ceil((coords[1] + 1) * SCREEN_HEIGHT / WORLD_HEIGHT));
end;
procedure Draw();
begin
ClearWindow(BACKGROUND);
for var i := 0 to snakeX.Length - 1 do PaintCell((snakeX[i], snakeY[i]), SNAKE_COLOR);
for var i := 0 to foodX.Length - 1 do PaintCell((foodX[i], foodY[i]), FOOD_COLOR);
Redraw;
end;
procedure Update;
begin
var tempDirs := dir;
var xSpeed := 0;
var ySpeed := 0;
case tempDirs of
0: ySpeed := -1;
1: xSpeed := 1;
2: ySpeed := 1;
3: xSpeed := -1;
end;
snakeX := snakeX[1:snakeX.Length - 1] + new integer[1](snakeX[snakeX.Length - 1] + xSpeed);
snakeY := snakeY[1:snakeX.Length - 1] + new integer[1](snakeY[snakeY.Length - 1] + ySpeed);
Draw();
end;
procedure Init;
begin
setLength(snakeX, START_CELLS_AMOUNT);
setLength(snakeY, START_CELLS_AMOUNT);
setLength(foodX, FOOD_AMOUNT);
setLength(foodY, FOOD_AMOUNT);
dir := 1;
SetConsoleIO;
LockDrawing;
SetWindowSize(SCREEN_WIDTH, SCREEN_HEIGHT);
SetSmoothingOn;
for var i := 0 to START_CELLS_AMOUNT - 1 do
begin
snakeX[i] := Round(WORLD_WIDTH / 2) - i;
snakeY[i] := Round(WORLD_HEIGHT / 2);
end;
for var i := 0 to FOOD_AMOUNT - 1 do
begin
foodX[i] := -1;
foodY[i] := -1;
end;
for var i := 0 to FOOD_AMOUNT - 1 do (foodX[i], foodY[i]) := generateFood;
OnKeyDown := KeyDown;
end;
procedure MainLoop;
begin
timer := new Timers.Timer(1000, Update);
timer.Start();
end;
begin
Init();
MainLoop();
end.
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