hedgewars/uLandGraphics.pas
author unc0rr
Thu, 12 Oct 2006 18:52:00 +0000
changeset 196 993cf173218b
parent 188 a7c2a61524c2
child 345 fa39c61be4de
permissions -rw-r--r--
- Many small fixes - Let CMake use FreePascal 1.9.4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
184
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
     1
unit uLandGraphics;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
     2
interface
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
     3
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
     4
type PRangeArray = ^TRangeArray;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
     5
     TRangeArray = array[0..31] of record
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
     6
                                   Left, Right: integer;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
     7
                                   end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
     8
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
     9
procedure DrawExplosion(X, Y, Radius: integer);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    10
procedure DrawHLinesExplosions(ar: PRangeArray; Radius: integer; y, dY: integer; Count: Byte);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    11
procedure DrawTunnel(X, Y, dX, dY: Double; ticks, HalfWidth: integer);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    12
procedure FillRoundInLand(X, Y, Radius: integer; Value: Longword);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    13
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    14
implementation
196
993cf173218b - Many small fixes
unc0rr
parents: 188
diff changeset
    15
uses SDLh, uMisc, uLand, uConsts;
184
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    16
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    17
procedure FillCircleLines(x, y, dx, dy: integer; Value: Longword);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    18
var i: integer;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    19
begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    20
if ((y + dy) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    21
   for i:= max(x - dx, 0) to min(x + dx, 2047) do Land[y + dy, i]:= Value;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    22
if ((y - dy) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    23
   for i:= max(x - dx, 0) to min(x + dx, 2047) do Land[y - dy, i]:= Value;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    24
if ((y + dx) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    25
   for i:= max(x - dy, 0) to min(x + dy, 2047) do Land[y + dx, i]:= Value;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    26
if ((y - dx) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    27
   for i:= max(x - dy, 0) to min(x + dy, 2047) do Land[y - dx, i]:= Value;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    28
end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    29
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    30
procedure FillRoundInLand(X, Y, Radius: integer; Value: Longword);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    31
var dx, dy, d: integer;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    32
begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    33
  dx:= 0;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    34
  dy:= Radius;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    35
  d:= 3 - 2 * Radius;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    36
  while (dx < dy) do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    37
     begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    38
     FillCircleLines(x, y, dx, dy, Value);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    39
     if (d < 0)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    40
     then d:= d + 4 * dx + 6
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    41
     else begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    42
          d:= d + 4 * (dx - dy) + 10;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    43
          dec(dy)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    44
          end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    45
     inc(dx)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    46
     end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    47
  if (dx = dy) then FillCircleLines(x, y, dx, dy, Value);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    48
end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    49
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    50
procedure ClearLandPixel(y, x: integer);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    51
var p: PByteArray;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    52
begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    53
p:= @PByteArray(LandSurface.pixels)^[LandSurface.pitch*y];
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    54
case LandSurface.format.BytesPerPixel of
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    55
     1: ;// not supported
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    56
     2: PWord(@p[x * 2])^:= 0;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    57
     3: begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    58
        p[x * 3 + 0]:= 0;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    59
        p[x * 3 + 1]:= 0;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    60
        p[x * 3 + 2]:= 0;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    61
        end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    62
     4: PLongword(@p[x * 4])^:= 0;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    63
     end
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    64
end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    65
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    66
procedure SetLandPixel(y, x: integer);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    67
var p: PByteArray;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    68
begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    69
p:= @PByteArray(LandSurface.pixels)^[LandSurface.pitch*y];
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    70
case LandSurface.format.BytesPerPixel of
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    71
     1: ;// not supported
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    72
     2: PWord(@p[x * 2])^:= cExplosionBorderColor;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    73
     3: begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    74
        p[x * 3 + 0]:= cExplosionBorderColor and $FF;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    75
        p[x * 3 + 1]:= (cExplosionBorderColor shr 8) and $FF;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    76
        p[x * 3 + 2]:= cExplosionBorderColor shr 16;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    77
        end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    78
     4: PLongword(@p[x * 4])^:= cExplosionBorderColor;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    79
     end
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    80
end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    81
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    82
procedure FillLandCircleLines0(x, y, dx, dy: integer);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    83
var i: integer;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    84
begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    85
if ((y + dy) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    86
   for i:= max(x - dx, 0) to min(x + dx, 2047) do ClearLandPixel(y + dy, i);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    87
if ((y - dy) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    88
   for i:= max(x - dx, 0) to min(x + dx, 2047) do ClearLandPixel(y - dy, i);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    89
if ((y + dx) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    90
   for i:= max(x - dy, 0) to min(x + dy, 2047) do ClearLandPixel(y + dx, i);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    91
if ((y - dx) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    92
   for i:= max(x - dy, 0) to min(x + dy, 2047) do ClearLandPixel(y - dx, i);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    93
end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    94
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    95
procedure FillLandCircleLinesEBC(x, y, dx, dy: integer);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    96
var i: integer;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    97
begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    98
if ((y + dy) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
    99
   for i:= max(x - dx, 0) to min(x + dx, 2047) do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   100
       if Land[y + dy, i] = COLOR_LAND then SetLandPixel(y + dy, i);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   101
if ((y - dy) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   102
   for i:= max(x - dx, 0) to min(x + dx, 2047) do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   103
       if Land[y - dy, i] = COLOR_LAND then SetLandPixel(y - dy, i);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   104
if ((y + dx) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   105
   for i:= max(x - dy, 0) to min(x + dy, 2047) do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   106
       if Land[y + dx, i] = COLOR_LAND then SetLandPixel(y + dx, i);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   107
if ((y - dx) and $FFFFFC00) = 0 then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   108
   for i:= max(x - dy, 0) to min(x + dy, 2047) do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   109
       if Land[y - dx, i] = COLOR_LAND then SetLandPixel(y - dx, i);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   110
end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   111
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   112
procedure DrawExplosion(X, Y, Radius: integer);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   113
var dx, dy, d: integer;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   114
begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   115
FillRoundInLand(X, Y, Radius, 0);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   116
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   117
if SDL_MustLock(LandSurface) then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   118
   SDLTry(SDL_LockSurface(LandSurface) >= 0, true);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   119
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   120
  dx:= 0;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   121
  dy:= Radius;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   122
  d:= 3 - 2 * Radius;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   123
  while (dx < dy) do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   124
     begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   125
     FillLandCircleLines0(x, y, dx, dy);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   126
     if (d < 0)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   127
     then d:= d + 4 * dx + 6
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   128
     else begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   129
          d:= d + 4 * (dx - dy) + 10;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   130
          dec(dy)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   131
          end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   132
     inc(dx)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   133
     end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   134
  if (dx = dy) then FillLandCircleLines0(x, y, dx, dy);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   135
  inc(Radius, 4);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   136
  dx:= 0;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   137
  dy:= Radius;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   138
  d:= 3 - 2 * Radius;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   139
  while (dx < dy) do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   140
     begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   141
     FillLandCircleLinesEBC(x, y, dx, dy);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   142
     if (d < 0)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   143
     then d:= d + 4 * dx + 6
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   144
     else begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   145
          d:= d + 4 * (dx - dy) + 10;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   146
          dec(dy)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   147
          end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   148
     inc(dx)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   149
     end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   150
  if (dx = dy) then FillLandCircleLinesEBC(x, y, dx, dy);  
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   151
  
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   152
if SDL_MustLock(LandSurface) then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   153
   SDL_UnlockSurface(LandSurface);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   154
end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   155
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   156
procedure DrawHLinesExplosions(ar: PRangeArray; Radius: integer; y, dY: integer; Count: Byte);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   157
var tx, ty, i: LongInt;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   158
begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   159
if SDL_MustLock(LandSurface) then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   160
   SDL_LockSurface(LandSurface);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   161
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   162
for i:= 0 to Pred(Count) do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   163
    begin
188
a7c2a61524c2 Cardinal -> Longword
unc0rr
parents: 184
diff changeset
   164
    for ty:= max(y - Radius, 0) to min(y + Radius, 1023) do
184
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   165
        for tx:= max(0, ar[i].Left - Radius) to min(2047, ar[i].Right + Radius) do
188
a7c2a61524c2 Cardinal -> Longword
unc0rr
parents: 184
diff changeset
   166
            ClearLandPixel(ty, tx);
184
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   167
    inc(y, dY)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   168
    end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   169
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   170
inc(Radius, 4);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   171
dec(y, Count*dY);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   172
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   173
for i:= 0 to Pred(Count) do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   174
    begin
188
a7c2a61524c2 Cardinal -> Longword
unc0rr
parents: 184
diff changeset
   175
    for ty:= max(y - Radius, 0) to min(y + Radius, 1023) do
184
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   176
        for tx:= max(0, ar[i].Left - Radius) to min(2047, ar[i].Right + Radius) do
188
a7c2a61524c2 Cardinal -> Longword
unc0rr
parents: 184
diff changeset
   177
            if Land[ty, tx] = $FFFFFF then
a7c2a61524c2 Cardinal -> Longword
unc0rr
parents: 184
diff changeset
   178
                  SetLandPixel(ty, tx);
184
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   179
    inc(y, dY)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   180
    end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   181
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   182
if SDL_MustLock(LandSurface) then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   183
   SDL_UnlockSurface(LandSurface);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   184
end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   185
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   186
//
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   187
//  - (dX, dY) - direction, vector of length = 0.5
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   188
//
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   189
procedure DrawTunnel(X, Y, dX, dY: Double; ticks, HalfWidth: integer);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   190
var nx, ny: Double;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   191
    i, t, tx, ty: Longint;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   192
begin  // (-dY, dX) is (dX, dY) rotated by PI/2
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   193
if SDL_MustLock(LandSurface) then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   194
   SDL_LockSurface(LandSurface);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   195
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   196
nx:= X + dY * (HalfWidth + 8);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   197
ny:= Y - dX * (HalfWidth + 8);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   198
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   199
for i:= 0 to 7 do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   200
    begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   201
    X:= nx - 8 * dX;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   202
    Y:= ny - 8 * dY;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   203
    for t:= -8 to ticks + 8 do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   204
        {$include tunsetborder.inc}
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   205
    nx:= nx - dY;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   206
    ny:= ny + dX;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   207
    end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   208
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   209
for i:= -HalfWidth to HalfWidth do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   210
    begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   211
    X:= nx - dX * 8;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   212
    Y:= ny - dY * 8;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   213
    for t:= 0 to 7 do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   214
        {$include tunsetborder.inc}
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   215
    X:= nx;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   216
    Y:= ny;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   217
    for t:= 0 to ticks do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   218
        begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   219
        X:= X + dX;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   220
        Y:= Y + dY;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   221
        tx:= round(X);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   222
        ty:= round(Y);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   223
        if ((ty and $FFFFFC00) = 0) and ((tx and $FFFFF800) = 0) then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   224
           begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   225
           Land[ty, tx]:= 0;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   226
           ClearLandPixel(ty, tx);
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   227
           end
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   228
        end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   229
    for t:= 0 to 7 do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   230
        {$include tunsetborder.inc}
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   231
    nx:= nx - dY;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   232
    ny:= ny + dX;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   233
    end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   234
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   235
for i:= 0 to 7 do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   236
    begin
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   237
    X:= nx - 8 * dX;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   238
    Y:= ny - 8 * dY;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   239
    for t:= -8 to ticks + 8 do
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   240
        {$include tunsetborder.inc}
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   241
    nx:= nx - dY;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   242
    ny:= ny + dX;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   243
    end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   244
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   245
if SDL_MustLock(LandSurface) then
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   246
   SDL_UnlockSurface(LandSurface)
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   247
end;
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   248
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   249
f97a7a3dc8f6 - Update more headers
unc0rr
parents: 109
diff changeset
   250
end.