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729 | -----------------------------------------------------------------------
--
-- Copyright (C) 2003 Dúlio Matos Leite de Carvalho e Silva
--
-- This file is part of LinXtris.
--
-- LinXtris is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
--
-----------------------------------------------------------------------
with Ada.Numerics;
with Ada.Numerics.Float_Random; use Ada.Numerics.Float_Random;
with Ada.Numerics.Discrete_Random;
package body Block_Engine is
-- Public Section
function Piece_X
(The : Object;
i : Integer)
return Integer
is
begin
return The.Piece (i).X;
end Piece_X;
function Piece_Y
(The : Object;
i : Integer)
return Integer
is
begin
return The.Piece (i).Y;
end Piece_Y;
function Ghost_X
(The : Object;
i : Integer)
return Integer
is
begin
return The.Ghost (i).X;
end Ghost_X;
function Ghost_Y
(The : Object;
i : Integer)
return Integer
is
begin
return The.Ghost (i).Y;
end Ghost_Y;
package Random_Shape_Pkg is
package Shape_Random is new Ada.Numerics.Discrete_Random (Piece_Shape_Type);
Shape_Vector : array (Piece_Shape_Type'Range) of Piece_Shape_Type;
Shape_Gen : Shape_Random.Generator;
procedure Init;
function Random_Shape return Piece_Shape_Type;
end Random_Shape_Pkg;
package body Random_Shape_Pkg is
-- This will "shuffle" the results of the generator
-- resulting in a better random sequence
function Random_Shape return Piece_Shape_Type is
Result, Index : Piece_Shape_Type;
begin
Index := Shape_Random.Random (Shape_Gen);
Result := Shape_Vector (Index);
Shape_Vector (Index) := Shape_Random.Random (Shape_Gen);
return Result;
end Random_Shape;
procedure Init is
begin
Shape_Random.Reset (Shape_Gen);
for K in Piece_Shape_Type'Range loop
Shape_Vector (K) := Shape_Random.Random (Shape_Gen);
end loop;
end Init;
end Random_Shape_Pkg;
function Random_Shape return Piece_Shape_Type renames Random_Shape_Pkg.Random_Shape;
procedure Init (The : in out Object) is
Dummy_OK : Boolean;
begin
Random_Shape_Pkg.Init;
The.Next_Piece_Shape := Random_Shape;
The.Lines_Number := 0;
The.Lines_Completed := 0;
The.Level_Has_Changed := False;
The.Game_Is_Over := False;
The.Auto_Down := False;
The.Next_Move := None;
The.Pieces_Number := 0;
The.Level := The.Initial_Level;
for i in The.Block_Color'Range (1) loop
for j in The.Block_Color'Range (2) loop
The.Block_Color (i, j) := Blank;
end loop;
end loop;
Put_Initial_Lines (The);
Put_Piece (The, Dummy_OK);
Set_Ghost (The);
The.Score := 0;
The.Bonus_Down := The.Initial_Level;
The.Bonus_Completed := The.Initial_Lines;
end Init;
procedure Set_Next_Move
(The : in out Object;
To : Move)
is
begin
The.Next_Move := To;
end Set_Next_Move;
procedure Set_Auto_Down (The : in out Object) is
begin
The.Auto_Down := True;
end Set_Auto_Down;
function Get_Pieces_Number
(The : Object)
return Integer
is
begin
return The.Pieces_Number;
end Get_Pieces_Number;
function Get_Piece_Color
(The : Object)
return Color
is
begin
return The.Piece_Color;
end Get_Piece_Color;
function Get_Next_Piece_Color
(The : Object)
return Color
is
begin
return Shape_To_Color (The.Next_Piece_Shape);
end Get_Next_Piece_Color;
function Get_Score
(The : Object)
return Integer
is
begin
return The.Score;
end Get_Score;
function Get_Level
(The : Object)
return Integer
is
begin
return The.Level;
end Get_Level;
procedure Set_Has_Ghost
(The : in out Object;
To : Boolean)
is
begin
The.Has_Ghost := To;
end Set_Has_Ghost;
function Get_Has_Ghost
(The : in Object)
return Boolean
is
begin
return The.Has_Ghost;
end Get_Has_Ghost;
function Get_Initial_Level
(The : Object)
return Integer
is
begin
return The.Initial_Level;
end Get_Initial_Level;
function Get_Lines_Completed
(The : Object)
return Integer
is
begin
return The.Lines_Completed;
end Get_Lines_Completed;
function Get_Lowest_Line_Completed
(The : Object)
return Integer
is
begin
return The.Lowest_Line_Completed;
end Get_Lowest_Line_Completed;
function Get_Lines_Number
(The : Object)
return Integer
is
begin
return The.Lines_Number;
end Get_Lines_Number;
function Game_Over
(The : Object)
return Boolean
is
begin
return The.Game_Is_Over;
end Game_Over;
function Level_Changed
(The : Object)
return Boolean
is
begin
return The.Level_Has_Changed;
end Level_Changed;
procedure Set_Initial_Level
(The : in out Object;
To : Positive)
is
begin
The.Initial_Level := To;
end Set_Initial_Level;
procedure Set_Initial_Lines
(The : in out Object;
To : Natural)
is
begin
The.Initial_Lines := To;
end Set_Initial_Lines;
function Get_Initial_Lines
(The : Object)
return Integer
is
begin
return The.Initial_Lines;
end Get_Initial_Lines;
function Get_Position_Color
(The : Object;
X : Positive;
Y : Positive)
return Color
is
begin
return The.Block_Color (X, Y);
end Get_Position_Color;
procedure Set_Random_Piece_Color
(The : in out Object;
To : Boolean)
is
begin
The.Random_Piece_Color := To;
end Set_Random_Piece_Color;
function Get_Random_Piece_Color
(The : in Object)
return Boolean
is
begin
return The.Random_Piece_Color;
end Get_Random_Piece_Color;
procedure Set_Ghost (The : in out Object) is
begin
if not The.Has_Ghost then
return;
end if;
The.Ghost := The.Piece;
Outer_Loop :
loop
for I in The.Ghost'Range loop
exit Outer_Loop when (The.Ghost (I).Y = 1);
exit Outer_Loop when (The.Block_Color (The.Ghost (I).X, The.Ghost (I).Y - 1) /= Blank);
end loop;
for I in The.Ghost'Range loop
The.Ghost (I).Y := The.Ghost (I).Y - 1;
end loop;
end loop Outer_Loop;
end Set_Ghost;
function Piece_Can_Move_Down
(The : in Object)
return Boolean
is
begin
for i in The.Piece'Range loop
if The.Piece (i).Y - 1 not in The.Block_Color'Range (2) then
return False;
end if;
if The.Block_Color (The.Piece (i).X, The.Piece (i).Y - 1) /= Blank then
return False;
end if;
end loop;
return True;
end Piece_Can_Move_Down;
procedure Process_Move (The : in out Object) is
Can_Move : Boolean;
begin
if The.Game_Is_Over then
return;
end if;
The.Lines_Completed := 0;
The.Level_Has_Changed := False;
if The.Next_Move = Drop then
Drop (The);
for i in 1 .. 4 loop
The.Block_Color (The.Piece (i).X, The.Piece (i).Y) := The.Piece_Color;
end loop;
The.Score := The.Score + 3 * The.Level + The.Bonus_Down;
Put_Piece (The, Can_Move);
if not Can_Move then
The.Game_Is_Over := True;
end if;
Check_Completed_Lines (The);
elsif The.Next_Move = Right then
Move_Right (The);
elsif The.Next_Move = Left then
Move_Left (The);
elsif The.Next_Move = Rotate then
Rotate (The);
elsif (The.Next_Move = Down) or (The.Auto_Down) then
Move_Down (The, Can_Move);
if not Can_Move then
The.Score := The.Score + 3 * The.Level + The.Bonus_Down;
for i in 1 .. 4 loop
The.Block_Color (The.Piece (i).X, The.Piece (i).Y) := The.Piece_Color;
end loop;
Put_Piece (The, Can_Move);
if not Can_Move then
The.Game_Is_Over := True;
end if;
end if;
Check_Completed_Lines (The);
The.Auto_Down := False;
if The.Lines_Number > 10 * (The.Level + 1 - The.Initial_Level) then
The.Level := The.Level + 1;
The.Level_Has_Changed := True;
end if;
end if;
Set_Ghost (The);
The.Next_Move := None;
end Process_Move;
-- Private Section
procedure Put_Initial_Lines (The : in out Object) is
G : Generator;
x : Natural := 1;
y : Natural := 1;
Line_Not_Completed : Boolean;
begin
Reset (G);
while y <= The.Initial_Lines loop
x := 1;
Line_Not_Completed := False;
while x in The.Block_Color'Range (1) loop
if Random (G) > 0.2 then
The.Block_Color (x, y) := Shape_To_Color (Random_Shape);
else
The.Block_Color (x, y) := Blank;
Line_Not_Completed := True;
end if;
x := x + 1;
end loop;
if Line_Not_Completed then
y := y + 1;
end if;
end loop;
end Put_Initial_Lines;
procedure Move_Right (The : in out Object) is
begin
for i in The.Piece'Range loop
if The.Piece (i).X + 1 not in The.Block_Color'Range (1) then
return;
end if;
if The.Block_Color (The.Piece (i).X + 1, The.Piece (i).Y) /= Blank then
return;
end if;
end loop;
for i in The.Piece'Range loop
The.Piece (i).X := The.Piece (i).X + 1;
end loop;
end Move_Right;
procedure Move_Left (The : in out Object) is
begin
for i in The.Piece'Range loop
if The.Piece (i).X - 1 not in The.Block_Color'Range (1) then
return;
end if;
if The.Block_Color (The.Piece (i).X - 1, The.Piece (i).Y) /= Blank then
return;
end if;
end loop;
for i in The.Piece'Range loop
The.Piece (i).X := The.Piece (i).X - 1;
end loop;
return;
end Move_Left;
procedure Move_Down
(The : in out Object;
Success : out Boolean)
is
begin
for i in The.Piece'Range loop
if The.Piece (i).Y - 1 not in The.Block_Color'Range (2) then
Success := False;
return;
end if;
if The.Block_Color (The.Piece (i).X, The.Piece (i).Y - 1) /= Blank then
Success := False;
return;
end if;
end loop;
for i in The.Piece'Range loop
The.Piece (i).Y := The.Piece (i).Y - 1;
end loop;
Success := True;
end Move_Down;
procedure Drop (The : in out Object) is
begin
loop
for i in The.Piece'Range loop
if The.Piece (i).Y - 1 not in The.Block_Color'Range (2) then
return;
end if;
if The.Block_Color (The.Piece (i).X, The.Piece (i).Y - 1) /= Blank then
for j in The.Piece'Range loop
return;
end loop;
end if;
end loop;
for i in The.Piece'Range loop
The.Piece (i).Y := The.Piece (i).Y - 1;
end loop;
end loop;
end Drop;
procedure Rotate (the : in out Object) is
type Pos is record
X : Integer;
Y : Integer;
end record;
Tmp : array (1 .. 4) of Pos;
X, Y : Integer;
begin
Tmp (1).X := the.Piece (1).X;
Tmp (1).Y := the.Piece (1).Y;
case the.Piece_Shape is
when Piece_Q =>
return;
when Piece_L | Piece_T | Piece_J =>
for i in (the.Piece'First + 1) .. (the.Piece'Last) loop
X := the.Piece (1).Y - the.Piece (i).Y + the.Piece (1).X;
Y := the.Piece (i).X - the.Piece (1).X + the.Piece (1).Y;
if (X > 0) and (Y > 0) then
Tmp (i).X := X;
Tmp (i).Y := Y;
else
return;
end if;
end loop;
when Piece_I | Piece_S | Piece_Z =>
if the.Piece (2).X = the.Piece (1).X then
for i in (the.Piece'First + 1) .. (the.Piece'Last) loop
Tmp (i).X := the.Piece (1).Y - the.Piece (i).Y + the.Piece (1).X;
Tmp (i).Y := the.Piece (i).X - the.Piece (1).X + the.Piece (1).Y;
end loop;
else
for i in (the.Piece'First + 1) .. (the.Piece'Last) loop
Tmp (i).X := -the.Piece (1).Y + the.Piece (i).Y + the.Piece (1).X;
Tmp (i).Y := -the.Piece (i).X + the.Piece (1).X + the.Piece (1).Y;
end loop;
end if;
end case;
for i in the.Piece'Range loop
if (Tmp (i).X not in the.Block_Color'Range (1)) or (Tmp (i).Y not in the.Block_Color'Range (2)) then
return;
end if;
if the.Block_Color (Tmp (i).X, Tmp (i).Y) /= Blank then
return;
end if;
end loop;
for i in the.Piece'Range loop
the.Piece (i).X := Tmp (i).X;
the.Piece (i).Y := Tmp (i).Y;
end loop;
end Rotate;
procedure Check_Completed_Lines (The : in out Object) is
i, j, y : Positive;
begin
for I in The.Completed_Lines_List'Range loop
The.Completed_Lines_List (I) := 0;
end loop;
The.Lines_Completed := 0;
j := 1;
while j <= The.Block_Color'Last (2) loop
i := 1;
while (The.Block_Color (i, j) /= Blank) and (i <= The.Block_Color'Last (1)) loop
i := i + 1;
if i = The.Block_Color'Last (1) + 1 then
exit;
end if;
end loop;
if i = The.Block_Color'Last (1) + 1 then
The.Lines_Completed := The.Lines_Completed + 1;
if The.Lines_Completed = 1 then
The.Lowest_Line_Completed := j;
end if;
The.Completed_Lines_List (The.Lines_Completed) := j;
y := j;
while (y < The.Block_Color'Last (2)) loop
for x in The.Block_Color'Range (1) loop
The.Block_Color (x, y) := The.Block_Color (x, y + 1);
end loop;
y := y + 1;
end loop;
else
j := j + 1;
end if;
end loop;
case The.Lines_Completed is
when 1 =>
The.Score := The.Score + The.Level * 30 + The.Bonus_Completed;
when 2 =>
The.Score := The.Score + The.Level * 35 * 2 + The.Bonus_Completed;
when 3 =>
The.Score := The.Score + The.Level * 40 * 3 + The.Bonus_Completed;
when 4 =>
The.Score := The.Score + The.Level * 45 * 4 + The.Bonus_Completed;
when others =>
null;
end case;
The.Lines_Number := The.Lines_Number + The.Lines_Completed;
end Check_Completed_Lines;
function Get_Completed_Lines_Number
(The : Object)
return Lines_Indication
is
begin
return The.Completed_Lines_List;
end Get_Completed_Lines_Number;
procedure Put_Piece
(The : in out Object;
Success : out Boolean)
is
begin
if The.Next_Piece_Shape = Piece_I then
The.Piece (1).X := The.Game_Width / 2;
The.Piece (1).Y := The.Game_Height - 1;
The.Piece (2).X := The.Game_Width / 2;
The.Piece (2).Y := The.Game_Height;
The.Piece (3).X := The.Game_Width / 2;
The.Piece (3).Y := The.Game_Height - 2;
The.Piece (4).X := The.Game_Width / 2;
The.Piece (4).Y := The.Game_Height - 3;
elsif The.Next_Piece_Shape = Piece_L then
The.Piece (1).X := The.Game_Width / 2;
The.Piece (1).Y := The.Game_Height - 2;
The.Piece (2).X := The.Game_Width / 2;
The.Piece (2).Y := The.Game_Height - 1;
The.Piece (3).X := The.Game_Width / 2;
The.Piece (3).Y := The.Game_Height - 3;
The.Piece (4).X := The.Game_Width / 2 + 1;
The.Piece (4).Y := The.Game_Height - 3;
elsif The.Next_Piece_Shape = Piece_J then
The.Piece (1).X := The.Game_Width / 2;
The.Piece (1).Y := The.Game_Height - 2;
The.Piece (2).X := The.Game_Width / 2;
The.Piece (2).Y := The.Game_Height - 1;
The.Piece (3).X := The.Game_Width / 2;
The.Piece (3).Y := The.Game_Height - 3;
The.Piece (4).X := The.Game_Width / 2 - 1;
The.Piece (4).Y := The.Game_Height - 3;
elsif The.Next_Piece_Shape = Piece_T then
The.Piece (1).X := The.Game_Width / 2;
The.Piece (1).Y := The.Game_Height - 3;
The.Piece (2).X := The.Game_Width / 2;
The.Piece (2).Y := The.Game_Height - 2;
The.Piece (3).X := The.Game_Width / 2 - 1;
The.Piece (3).Y := The.Game_Height - 3;
The.Piece (4).X := The.Game_Width / 2 + 1;
The.Piece (4).Y := The.Game_Height - 3;
elsif The.Next_Piece_Shape = Piece_S then
The.Piece (1).X := The.Game_Width / 2;
The.Piece (1).Y := The.Game_Height - 2;
The.Piece (2).X := The.Game_Width / 2;
The.Piece (2).Y := The.Game_Height - 3;
The.Piece (3).X := The.Game_Width / 2 - 1;
The.Piece (3).Y := The.Game_Height - 3;
The.Piece (4).X := The.Game_Width / 2 + 1;
The.Piece (4).Y := The.Game_Height - 2;
elsif The.Next_Piece_Shape = Piece_Z then
The.Piece (1).X := The.Game_Width / 2;
The.Piece (1).Y := The.Game_Height - 3;
The.Piece (2).X := The.Game_Width / 2;
The.Piece (2).Y := The.Game_Height - 2;
The.Piece (3).X := The.Game_Width / 2 - 1;
The.Piece (3).Y := The.Game_Height - 2;
The.Piece (4).X := The.Game_Width / 2 + 1;
The.Piece (4).Y := The.Game_Height - 3;
elsif The.Next_Piece_Shape = Piece_Q then
The.Piece (1).X := The.Game_Width / 2;
The.Piece (1).Y := The.Game_Height - 2;
The.Piece (2).X := The.Game_Width / 2 + 1;
The.Piece (2).Y := The.Game_Height - 2;
The.Piece (3).X := The.Game_Width / 2;
The.Piece (3).Y := The.Game_Height - 3;
The.Piece (4).X := The.Game_Width / 2 + 1;
The.Piece (4).Y := The.Game_Height - 3;
end if;
if not The.Random_Piece_Color then
The.Piece_Color := Shape_To_Color (The.Next_Piece_Shape);
else
The.Piece_Color := Shape_To_Color (Random_Shape);
end if;
The.Piece_Shape := The.Next_Piece_Shape;
The.Next_Piece_Shape := Random_Shape;
for i in The.Piece'Range loop
if The.Block_Color (The.Piece (i).X, The.Piece (i).Y) /= Blank then
Success := False;
return;
end if;
end loop;
The.Pieces_Number := The.Pieces_Number + 1;
Success := True;
end Put_Piece;
function Shape_To_Color
(Shape : Piece_Shape_Type)
return Color
is
begin
case Shape is
when Piece_I =>
return Red;
when Piece_J =>
return Magenta;
when Piece_L =>
return Yellow;
when Piece_T =>
return Grey;
when Piece_Q =>
return Cyan;
when Piece_Z =>
return Green;
when Piece_S =>
return Blue;
end case;
end Shape_To_Color;
end Block_Engine;
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