+
−(*
+
− * Hedgewars, a free turn based strategy game
+
− * Copyright (c) 2005-2008 Andrey Korotaev <unC0Rr@gmail.com>
+
− *
+
− * This program 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; version 2 of the License
+
− *
+
− * 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
+
− *)
+
−
+
−unit uLandGraphics;
+
−interface
+
−uses uFloat, uConsts;
+
−{$INCLUDE options.inc}
+
−
+
−type PRangeArray = ^TRangeArray;
+
−     TRangeArray = array[0..31] of record
+
−                                   Left, Right: LongInt;
+
−                                   end;
+
−
+
−procedure DrawExplosion(X, Y, Radius: LongInt);
+
−procedure DrawHLinesExplosions(ar: PRangeArray; Radius: LongInt; y, dY: LongInt; Count: Byte);
+
−procedure DrawTunnel(X, Y, dX, dY: hwFloat; ticks, HalfWidth: LongInt);
+
−procedure FillRoundInLand(X, Y, Radius: LongInt; Value: Longword);
+
−procedure ChangeRoundInLand(X, Y, Radius: LongInt; doSet: boolean);
+
−
+
−function TryPlaceOnLand(cpX, cpY: LongInt; Obj: TSprite; Frame: LongInt; doPlace: boolean): boolean;
+
−
+
−implementation
+
−uses SDLh, uMisc, uLand;
+
−
+
−procedure FillCircleLines(x, y, dx, dy: LongInt; Value: Longword);
+
−var i: LongInt;
+
−begin
+
−if ((y + dy) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dx, 0) to min(x + dx, 2047) do Land[y + dy, i]:= Value;
+
−if ((y - dy) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dx, 0) to min(x + dx, 2047) do Land[y - dy, i]:= Value;
+
−if ((y + dx) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dy, 0) to min(x + dy, 2047) do Land[y + dx, i]:= Value;
+
−if ((y - dx) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dy, 0) to min(x + dy, 2047) do Land[y - dx, i]:= Value;
+
−end;
+
−
+
−procedure ChangeCircleLines(x, y, dx, dy: LongInt; doSet: boolean);
+
−var i: LongInt;
+
−begin
+
−if not doSet then
+
−   begin
+
−   if ((y + dy) and $FFFFFC00) = 0 then
+
−      for i:= max(x - dx, 0) to min(x + dx, 2047) do
+
−          if (Land[y + dy, i] > 0) then dec(Land[y + dy, i]); // check > 0 because explosion can erase collision data
+
−   if ((y - dy) and $FFFFFC00) = 0 then
+
−      for i:= max(x - dx, 0) to min(x + dx, 2047) do
+
−          if (Land[y - dy, i] > 0) then dec(Land[y - dy, i]);
+
−   if ((y + dx) and $FFFFFC00) = 0 then
+
−      for i:= max(x - dy, 0) to min(x + dy, 2047) do
+
−          if (Land[y + dx, i] > 0) then dec(Land[y + dx, i]);
+
−   if ((y - dx) and $FFFFFC00) = 0 then
+
−      for i:= max(x - dy, 0) to min(x + dy, 2047) do
+
−          if (Land[y - dx, i] > 0) then dec(Land[y - dx, i]);
+
−   end else
+
−   begin
+
−   if ((y + dy) and $FFFFFC00) = 0 then
+
−      for i:= max(x - dx, 0) to min(x + dx, 2047) do inc(Land[y + dy, i]);
+
−   if ((y - dy) and $FFFFFC00) = 0 then
+
−      for i:= max(x - dx, 0) to min(x + dx, 2047) do inc(Land[y - dy, i]);
+
−   if ((y + dx) and $FFFFFC00) = 0 then
+
−      for i:= max(x - dy, 0) to min(x + dy, 2047) do inc(Land[y + dx, i]);
+
−   if ((y - dx) and $FFFFFC00) = 0 then
+
−      for i:= max(x - dy, 0) to min(x + dy, 2047) do inc(Land[y - dx, i]);
+
−   end
+
−end;
+
−
+
−procedure FillRoundInLand(X, Y, Radius: LongInt; Value: Longword);
+
−var dx, dy, d: LongInt;
+
−begin
+
−  dx:= 0;
+
−  dy:= Radius;
+
−  d:= 3 - 2 * Radius;
+
−  while (dx < dy) do
+
−     begin
+
−     FillCircleLines(x, y, dx, dy, Value);
+
−     if (d < 0)
+
−     then d:= d + 4 * dx + 6
+
−     else begin
+
−          d:= d + 4 * (dx - dy) + 10;
+
−          dec(dy)
+
−          end;
+
−     inc(dx)
+
−     end;
+
−  if (dx = dy) then FillCircleLines(x, y, dx, dy, Value);
+
−end;
+
−
+
−procedure ChangeRoundInLand(X, Y, Radius: LongInt; doSet: boolean);
+
−var dx, dy, d: LongInt;
+
−begin
+
−  dx:= 0;
+
−  dy:= Radius;
+
−  d:= 3 - 2 * Radius;
+
−  while (dx < dy) do
+
−     begin
+
−     ChangeCircleLines(x, y, dx, dy, doSet);
+
−     if (d < 0)
+
−     then d:= d + 4 * dx + 6
+
−     else begin
+
−          d:= d + 4 * (dx - dy) + 10;
+
−          dec(dy)
+
−          end;
+
−     inc(dx)
+
−     end;
+
−  if (dx = dy) then ChangeCircleLines(x, y, dx, dy, doSet)
+
−end;
+
−
+
−procedure FillLandCircleLines0(x, y, dx, dy: LongInt);
+
−var i: LongInt;
+
−begin
+
−if ((y + dy) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dx, 0) to min(x + dx, 2047) do LandPixels[y + dy, i]:= 0;
+
−if ((y - dy) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dx, 0) to min(x + dx, 2047) do LandPixels[y - dy, i]:= 0;
+
−if ((y + dx) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dy, 0) to min(x + dy, 2047) do LandPixels[y + dx, i]:= 0;
+
−if ((y - dx) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dy, 0) to min(x + dy, 2047) do LandPixels[y - dx, i]:= 0;
+
−end;
+
−
+
−procedure FillLandCircleLinesEBC(x, y, dx, dy: LongInt);
+
−var i: LongInt;
+
−begin
+
−if ((y + dy) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dx, 0) to min(x + dx, 2047) do
+
−       if Land[y + dy, i] = COLOR_LAND then LandPixels[y + dy, i]:= cExplosionBorderColor;
+
−if ((y - dy) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dx, 0) to min(x + dx, 2047) do
+
−       if Land[y - dy, i] = COLOR_LAND then LandPixels[y - dy, i]:= cExplosionBorderColor;
+
−if ((y + dx) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dy, 0) to min(x + dy, 2047) do
+
−       if Land[y + dx, i] = COLOR_LAND then LandPixels[y + dx, i]:= cExplosionBorderColor;
+
−if ((y - dx) and $FFFFFC00) = 0 then
+
−   for i:= max(x - dy, 0) to min(x + dy, 2047) do
+
−       if Land[y - dx, i] = COLOR_LAND then LandPixels[y - dx, i]:= cExplosionBorderColor;
+
−end;
+
−
+
−procedure DrawExplosion(X, Y, Radius: LongInt);
+
−var dx, dy, d: LongInt;
+
−begin
+
−FillRoundInLand(X, Y, Radius, 0);
+
−
+
−  dx:= 0;
+
−  dy:= Radius;
+
−  d:= 3 - 2 * Radius;
+
−  while (dx < dy) do
+
−     begin
+
−     FillLandCircleLines0(x, y, dx, dy);
+
−     if (d < 0)
+
−     then d:= d + 4 * dx + 6
+
−     else begin
+
−          d:= d + 4 * (dx - dy) + 10;
+
−          dec(dy)
+
−          end;
+
−     inc(dx)
+
−     end;
+
−  if (dx = dy) then FillLandCircleLines0(x, y, dx, dy);
+
−  inc(Radius, 4);
+
−  dx:= 0;
+
−  dy:= Radius;
+
−  d:= 3 - 2 * Radius;
+
−  while (dx < dy) do
+
−     begin
+
−     FillLandCircleLinesEBC(x, y, dx, dy);
+
−     if (d < 0)
+
−     then d:= d + 4 * dx + 6
+
−     else begin
+
−          d:= d + 4 * (dx - dy) + 10;
+
−          dec(dy)
+
−          end;
+
−     inc(dx)
+
−     end;
+
−  if (dx = dy) then FillLandCircleLinesEBC(x, y, dx, dy);
+
−
+
−d:= max(Y - Radius - 1, 0);
+
−dy:= min(Y + Radius + 1, 1023) - d;
+
−UpdateLandTexture(d, dy)
+
−end;
+
−
+
−procedure DrawHLinesExplosions(ar: PRangeArray; Radius: LongInt; y, dY: LongInt; Count: Byte);
+
−var tx, ty, i: LongInt;
+
−begin
+
−for i:= 0 to Pred(Count) do
+
−    begin
+
−    for ty:= max(y - Radius, 0) to min(y + Radius, 1023) do
+
−        for tx:= max(0, ar^[i].Left - Radius) to min(2047, ar^[i].Right + Radius) do
+
−            LandPixels[ty, tx]:= 0;
+
−    inc(y, dY)
+
−    end;
+
−
+
−inc(Radius, 4);
+
−dec(y, Count * dY);
+
−
+
−for i:= 0 to Pred(Count) do
+
−    begin
+
−    for ty:= max(y - Radius, 0) to min(y + Radius, 1023) do
+
−        for tx:= max(0, ar^[i].Left - Radius) to min(2047, ar^[i].Right + Radius) do
+
−            if Land[ty, tx] = $FFFFFF then
+
−                  LandPixels[ty, tx]:= cExplosionBorderColor;
+
−    inc(y, dY)
+
−    end;
+
−
+
−
+
−UpdateLandTexture(0, 1023)
+
−end;
+
−
+
−//
+
−//  - (dX, dY) - direction, vector of length = 0.5
+
−//
+
−procedure DrawTunnel(X, Y, dX, dY: hwFloat; ticks, HalfWidth: LongInt);
+
−var nx, ny, dX8, dY8: hwFloat;
+
−    i, t, tx, ty, stY: Longint;
+
−begin  // (-dY, dX) is (dX, dY) rotated by PI/2
+
−stY:= hwRound(Y);
+
−
+
−nx:= X + dY * (HalfWidth + 8);
+
−ny:= Y - dX * (HalfWidth + 8);
+
−
+
−dX8:= dX * 8;
+
−dY8:= dY * 8;
+
−for i:= 0 to 7 do
+
−    begin
+
−    X:= nx - dX8;
+
−    Y:= ny - dY8;
+
−    for t:= -8 to ticks + 8 do
+
−        {$include tunsetborder.inc}
+
−    nx:= nx - dY;
+
−    ny:= ny + dX;
+
−    end;
+
−
+
−for i:= -HalfWidth to HalfWidth do
+
−    begin
+
−    X:= nx - dX8;
+
−    Y:= ny - dY8;
+
−    for t:= 0 to 7 do
+
−        {$include tunsetborder.inc}
+
−    X:= nx;
+
−    Y:= ny;
+
−    for t:= 0 to ticks do
+
−        begin
+
−        X:= X + dX;
+
−        Y:= Y + dY;
+
−        tx:= hwRound(X);
+
−        ty:= hwRound(Y);
+
−        if ((ty and $FFFFFC00) = 0) and ((tx and $FFFFF800) = 0) then
+
−         if Land[ty, tx] = COLOR_LAND then
+
−           begin
+
−           Land[ty, tx]:= 0;
+
−           LandPixels[ty, tx]:= 0;
+
−           end
+
−        end;
+
−    for t:= 0 to 7 do
+
−        {$include tunsetborder.inc}
+
−    nx:= nx - dY;
+
−    ny:= ny + dX;
+
−    end;
+
−
+
−for i:= 0 to 7 do
+
−    begin
+
−    X:= nx - dX8;
+
−    Y:= ny - dY8;
+
−    for t:= -8 to ticks + 8 do
+
−        {$include tunsetborder.inc}
+
−    nx:= nx - dY;
+
−    ny:= ny + dX;
+
−    end;
+
−
+
−t:= max(stY - HalfWidth * 2 - 4 - abs(hwRound(dY * ticks)), 0);
+
−ty:= min(stY + HalfWidth * 2 + 4 + abs(hwRound(dY * ticks)), 1023) - t;
+
−UpdateLandTexture(t, ty)
+
−end;
+
−
+
−function TryPlaceOnLand(cpX, cpY: LongInt; Obj: TSprite; Frame: LongInt; doPlace: boolean): boolean;
+
−var X, Y, bpp, h, w: LongInt;
+
−    p: PByteArray;
+
−    Image: PSDL_Surface;
+
−begin
+
−TryDo(SpritesData[Obj].Surface <> nil, 'Assert SpritesData[Obj].Surface failed', true);
+
−Image:= SpritesData[Obj].Surface;
+
−w:= SpritesData[Obj].Width;
+
−h:= SpritesData[Obj].Height;
+
−
+
−if SDL_MustLock(Image) then
+
−   SDLTry(SDL_LockSurface(Image) >= 0, true);
+
−
+
−bpp:= Image^.format^.BytesPerPixel;
+
−TryDo(bpp = 4, 'It should be 32 bpp sprite', true);
+
−// Check that sprite fits free space
+
−p:= @(PByteArray(Image^.pixels)^[Image^.pitch * Frame * h]);
+
−case bpp of
+
−     4: for y:= 0 to Pred(h) do
+
−            begin
+
−            for x:= 0 to Pred(w) do
+
−                if PLongword(@(p^[x * 4]))^ <> 0 then
+
−                   if (((cpY + y) and $FFFFFC00) <> 0) or
+
−                      (((cpX + x) and $FFFFF800) <> 0) or
+
−                      (Land[cpY + y, cpX + x] <> 0) then
+
−                      begin
+
−                      if SDL_MustLock(Image) then
+
−                         SDL_UnlockSurface(Image);
+
−                      exit(false)
+
−                      end;
+
−            p:= @(p^[Image^.pitch]);
+
−            end;
+
−     end;
+
−
+
−TryPlaceOnLand:= true;
+
−if not doPlace then
+
−   begin
+
−   if SDL_MustLock(Image) then
+
−      SDL_UnlockSurface(Image);
+
−   exit
+
−   end;
+
−
+
−// Checked, now place
+
−p:= @(PByteArray(Image^.pixels)^[Image^.pitch * Frame * h]);
+
−case bpp of
+
−     4: for y:= 0 to Pred(h) do
+
−            begin
+
−            for x:= 0 to Pred(w) do
+
−                if PLongword(@(p^[x * 4]))^ <> 0 then
+
−                   begin
+
−                   Land[cpY + y, cpX + x]:= COLOR_LAND;
+
−                   LandPixels[cpY + y, cpX + x]:= PLongword(@(p^[x * 4]))^
+
−                   end;
+
−            p:= @(p^[Image^.pitch]);
+
−            end;
+
−     end;
+
−if SDL_MustLock(Image) then
+
−   SDL_UnlockSurface(Image);
+
−
+
−y:= max(cpY, 0);
+
−h:= min(cpY + Image^.h, 1023) - y;
+
−UpdateLandTexture(y, h)
+
−end;
+
−
+
−
+
−end.