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393
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(*
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* Hedgewars, a worms-like game
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* Copyright (c) 2005-2007 Andrey Korotaev <unC0Rr@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*)
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184
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unit uLandGraphics;
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interface
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351
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uses uFloat;
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345
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{$INCLUDE options.inc}
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184
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type PRangeArray = ^TRangeArray;
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TRangeArray = array[0..31] of record
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371
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Left, Right: LongInt;
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184
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end;
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371
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procedure DrawExplosion(X, Y, Radius: LongInt);
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procedure DrawHLinesExplosions(ar: PRangeArray; Radius: LongInt; y, dY: LongInt; Count: Byte);
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procedure DrawTunnel(X, Y, dX, dY: hwFloat; ticks, HalfWidth: LongInt);
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procedure FillRoundInLand(X, Y, Radius: LongInt; Value: Longword);
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184
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implementation
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196
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uses SDLh, uMisc, uLand, uConsts;
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184
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371
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procedure FillCircleLines(x, y, dx, dy: LongInt; Value: Longword);
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var i: LongInt;
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begin
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if ((y + dy) and $FFFFFC00) = 0 then
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for i:= max(x - dx, 0) to min(x + dx, 2047) do Land[y + dy, i]:= Value;
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if ((y - dy) and $FFFFFC00) = 0 then
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for i:= max(x - dx, 0) to min(x + dx, 2047) do Land[y - dy, i]:= Value;
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if ((y + dx) and $FFFFFC00) = 0 then
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for i:= max(x - dy, 0) to min(x + dy, 2047) do Land[y + dx, i]:= Value;
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if ((y - dx) and $FFFFFC00) = 0 then
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for i:= max(x - dy, 0) to min(x + dy, 2047) do Land[y - dx, i]:= Value;
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end;
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371
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procedure FillRoundInLand(X, Y, Radius: LongInt; Value: Longword);
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var dx, dy, d: LongInt;
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184
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begin
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dx:= 0;
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dy:= Radius;
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d:= 3 - 2 * Radius;
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while (dx < dy) do
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begin
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FillCircleLines(x, y, dx, dy, Value);
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if (d < 0)
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then d:= d + 4 * dx + 6
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else begin
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d:= d + 4 * (dx - dy) + 10;
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dec(dy)
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end;
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inc(dx)
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end;
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if (dx = dy) then FillCircleLines(x, y, dx, dy, Value);
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end;
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procedure ClearLandPixel(y, x: LongInt);
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184
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var p: PByteArray;
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begin
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p:= @PByteArray(LandSurface^.pixels)^[LandSurface^.pitch * y];
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case LandSurface^.format^.BytesPerPixel of
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1: ;// not supported
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351
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2: PWord(@(p^[x * 2]))^:= 0;
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3: begin
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p^[x * 3 + 0]:= 0;
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p^[x * 3 + 1]:= 0;
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p^[x * 3 + 2]:= 0;
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end;
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4: PLongword(@(p^[x * 4]))^:= 0;
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end
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end;
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procedure SetLandPixel(y, x: LongInt);
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var p: PByteArray;
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begin
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p:= @PByteArray(LandSurface^.pixels)^[LandSurface^.pitch * y];
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case LandSurface^.format^.BytesPerPixel of
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1: ;// not supported
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2: PWord(@(p^[x * 2]))^:= cExplosionBorderColor;
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3: begin
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p^[x * 3 + 0]:= cExplosionBorderColor and $FF;
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p^[x * 3 + 1]:= (cExplosionBorderColor shr 8) and $FF;
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p^[x * 3 + 2]:= cExplosionBorderColor shr 16;
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end;
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4: PLongword(@(p^[x * 4]))^:= cExplosionBorderColor;
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end
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end;
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procedure FillLandCircleLines0(x, y, dx, dy: LongInt);
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var i: LongInt;
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begin
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if ((y + dy) and $FFFFFC00) = 0 then
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for i:= max(x - dx, 0) to min(x + dx, 2047) do ClearLandPixel(y + dy, i);
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if ((y - dy) and $FFFFFC00) = 0 then
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for i:= max(x - dx, 0) to min(x + dx, 2047) do ClearLandPixel(y - dy, i);
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if ((y + dx) and $FFFFFC00) = 0 then
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for i:= max(x - dy, 0) to min(x + dy, 2047) do ClearLandPixel(y + dx, i);
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if ((y - dx) and $FFFFFC00) = 0 then
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for i:= max(x - dy, 0) to min(x + dy, 2047) do ClearLandPixel(y - dx, i);
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end;
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procedure FillLandCircleLinesEBC(x, y, dx, dy: LongInt);
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var i: LongInt;
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begin
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if ((y + dy) and $FFFFFC00) = 0 then
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for i:= max(x - dx, 0) to min(x + dx, 2047) do
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if Land[y + dy, i] = COLOR_LAND then SetLandPixel(y + dy, i);
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if ((y - dy) and $FFFFFC00) = 0 then
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for i:= max(x - dx, 0) to min(x + dx, 2047) do
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if Land[y - dy, i] = COLOR_LAND then SetLandPixel(y - dy, i);
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if ((y + dx) and $FFFFFC00) = 0 then
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for i:= max(x - dy, 0) to min(x + dy, 2047) do
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if Land[y + dx, i] = COLOR_LAND then SetLandPixel(y + dx, i);
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if ((y - dx) and $FFFFFC00) = 0 then
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for i:= max(x - dy, 0) to min(x + dy, 2047) do
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if Land[y - dx, i] = COLOR_LAND then SetLandPixel(y - dx, i);
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end;
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procedure DrawExplosion(X, Y, Radius: LongInt);
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var dx, dy, d: LongInt;
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begin
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FillRoundInLand(X, Y, Radius, 0);
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if SDL_MustLock(LandSurface) then
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SDLTry(SDL_LockSurface(LandSurface) >= 0, true);
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dx:= 0;
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dy:= Radius;
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d:= 3 - 2 * Radius;
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while (dx < dy) do
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begin
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FillLandCircleLines0(x, y, dx, dy);
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if (d < 0)
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then d:= d + 4 * dx + 6
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else begin
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d:= d + 4 * (dx - dy) + 10;
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dec(dy)
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end;
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inc(dx)
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end;
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if (dx = dy) then FillLandCircleLines0(x, y, dx, dy);
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inc(Radius, 4);
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dx:= 0;
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dy:= Radius;
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d:= 3 - 2 * Radius;
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while (dx < dy) do
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begin
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FillLandCircleLinesEBC(x, y, dx, dy);
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if (d < 0)
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then d:= d + 4 * dx + 6
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else begin
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d:= d + 4 * (dx - dy) + 10;
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dec(dy)
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end;
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inc(dx)
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end;
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if (dx = dy) then FillLandCircleLinesEBC(x, y, dx, dy);
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if SDL_MustLock(LandSurface) then
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SDL_UnlockSurface(LandSurface);
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end;
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procedure DrawHLinesExplosions(ar: PRangeArray; Radius: LongInt; y, dY: LongInt; Count: Byte);
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var tx, ty, i: LongInt;
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begin
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if SDL_MustLock(LandSurface) then
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SDL_LockSurface(LandSurface);
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for i:= 0 to Pred(Count) do
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begin
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for ty:= max(y - Radius, 0) to min(y + Radius, 1023) do
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for tx:= max(0, ar^[i].Left - Radius) to min(2047, ar^[i].Right + Radius) do
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ClearLandPixel(ty, tx);
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inc(y, dY)
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end;
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inc(Radius, 4);
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dec(y, Count * dY);
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for i:= 0 to Pred(Count) do
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begin
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for ty:= max(y - Radius, 0) to min(y + Radius, 1023) do
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for tx:= max(0, ar^[i].Left - Radius) to min(2047, ar^[i].Right + Radius) do
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if Land[ty, tx] = $FFFFFF then
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SetLandPixel(ty, tx);
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inc(y, dY)
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end;
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if SDL_MustLock(LandSurface) then
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SDL_UnlockSurface(LandSurface);
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end;
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//
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// - (dX, dY) - direction, vector of length = 0.5
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//
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procedure DrawTunnel(X, Y, dX, dY: hwFloat; ticks, HalfWidth: LongInt);
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var nx, ny, dX8, dY8: hwFloat;
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i, t, tx, ty: Longint;
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begin // (-dY, dX) is (dX, dY) rotated by PI/2
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if SDL_MustLock(LandSurface) then
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SDL_LockSurface(LandSurface);
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nx:= X + dY * (HalfWidth + 8);
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ny:= Y - dX * (HalfWidth + 8);
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dX8:= dX * 8;
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dY8:= dY * 8;
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for i:= 0 to 7 do
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begin
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X:= nx - dX8;
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Y:= ny - dY8;
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for t:= -8 to ticks + 8 do
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{$include tunsetborder.inc}
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nx:= nx - dY;
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ny:= ny + dX;
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end;
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for i:= -HalfWidth to HalfWidth do
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begin
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X:= nx - dX8;
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Y:= ny - dY8;
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for t:= 0 to 7 do
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{$include tunsetborder.inc}
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X:= nx;
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Y:= ny;
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for t:= 0 to ticks do
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begin
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X:= X + dX;
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Y:= Y + dY;
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tx:= hwRound(X);
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ty:= hwRound(Y);
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if ((ty and $FFFFFC00) = 0) and ((tx and $FFFFF800) = 0) then
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begin
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Land[ty, tx]:= 0;
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ClearLandPixel(ty, tx);
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end
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end;
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for t:= 0 to 7 do
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{$include tunsetborder.inc}
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nx:= nx - dY;
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ny:= ny + dX;
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end;
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for i:= 0 to 7 do
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begin
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X:= nx - dX8;
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Y:= ny - dY8;
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for t:= -8 to ticks + 8 do
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{$include tunsetborder.inc}
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nx:= nx - dY;
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ny:= ny + dX;
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end;
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if SDL_MustLock(LandSurface) then
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SDL_UnlockSurface(LandSurface)
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end;
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end.
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