forked from KolibriOS/kolibrios
257 lines
6.4 KiB
ObjectPascal
257 lines
6.4 KiB
ObjectPascal
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{ ‚ FreePascal 2.2.0 ª®¤¨à®¢ª cp866 ¥ ॠ«¨§®¢ . }
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{-$codepage cp866}
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{$mode objfpc}
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{$apptype gui}
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{$r-}
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program Ray;
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const
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MSG_PRESSKEY = '<27> ¦¬¨ ª®¯ªã...';
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MSG_USAGE = '„«ï ¯¥à¥¬¥è¥¨ï ¨ ¢à è¥¨ï ¨á¯®«ì§ã© áâ५ª¨';
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WIDTH = 320;
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HEIGHT = 200;
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COLORS = 128;
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FlatPalette: array[1..COLORS * 3] of Byte = (
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0,10,20,48,48,48,1,0,43,1,3,43,2,5,44,2,7,44,3,9,45,4,11,46,5,13,47,6,15,48,
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7,17,49,8,19,50,9,21,51,10,22,52,11,24,52,12,26,54,13,28,54,14,30,56,15,32,
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56,16,34,58,17,34,58,17,36,58,18,38,60,19,40,60,20,42,62,21,44,62,10,31,0,
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11,31,0,11,31,1,11,32,1,12,32,1,12,32,2,12,33,2,13,33,2,14,33,3,15,33,3,15,
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34,3,15,34,4,15,35,4,16,35,4,16,35,5,16,36,5,17,36,5,17,36,6,18,37,6,18,38,
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7,19,38,8,20,39,8,20,40,9,21,40,10,22,41,10,22,42,11,23,42,12,24,43,12,24,
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44,13,25,44,14,25,45,14,26,46,15,27,46,16,27,47,17,28,47,18,28,48,19,29,49,
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19,30,49,20,30,50,21,31,51,21,32,51,22,32,52,23,33,53,23,34,53,24,34,54,25,
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35,55,25,36,55,26,36,56,27,37,57,27,38,57,27,39,57,27,41,57,27,42,57,27,43,
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57,27,44,57,27,45,57,27,46,57,27,47,57,27,49,57,27,50,57,27,51,57,27,52,57,
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27,53,57,27,55,57,27,56,57,27,57,57,27,58,57,27,58,57,26,58,57,25,58,57,24,
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58,56,23,58,55,22,58,54,20,58,53,19,58,51,18,58,50,17,58,50,16,58,49,15,58,
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48,14,58,47,13,58,46,12,58,45,11,58,44,11,58,44,10,58,43,10,58,42,9,57,41,
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8,57,40,8,56,39,7,56,38,6,55,37,5,55,35,4,54,33,4,54,31,2,32,32,32,63,63,63,
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63,63,63,63,63,63,63,63,63,48,48,48,63,63,63,63,63,63);
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type
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TRGBColor = packed record
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R, G, B: Byte;
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end;
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PRGBPalette = ^TRGBPalette;
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TRGBPalette = array[0..COLORS - 1] of TRGBColor;
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PRGBBuffer = ^TRGBBuffer;
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TRGBBuffer = array[0..HEIGHT - 1, 0..WIDTH - 1] of TRGBColor;
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lrgarr = array[Word] of Byte;
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sq = array[0..254, 0..255] of Byte;
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var
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mp: ^lrgarr;
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rng: array[0..320] of Byte;
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fcos, fsin: array[0..359] of Integer;
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RGBBuffer : PRGBBuffer;
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RGBPalette: TRGBPalette absolute FlatPalette;
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Message: String = '';
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function NCol(mc, n, dvd: Longint): Byte;
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var
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loc: Byte;
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begin
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loc := Byte((mc + n - Random(2 * n)) div dvd);
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if loc > 100 then Result := 100 else
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if loc < 5 then Result := 5 else
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Result := loc;
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end;
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procedure Plasma(x1, y1, x2, y2: Word);
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var
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xn, yn, dxy : Word;
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p1, p2, p3, p4: Word;
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begin
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if (x2 - x1 > 1) or (y2 - y1 > 1) then
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begin
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p1 := mp^[Word(y1 shl 8 + x1)];
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p2 := mp^[Word(y2 shl 8 + x1)];
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p3 := mp^[Word(y1 shl 8 + x2)];
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p4 := mp^[Word(y2 shl 8 + x2)];
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xn := (x2 + x1) shr 1;
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yn := (y2 + y1) shr 1;
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dxy:= 5 * (x2 - x1 + y2 - y1) div 3;
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if mp^[y1 shl 8 + xn] = 0 then mp^[Word(y1 shl 8 + xn)] := NCol(p1 + p3, dxy, 2);
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if mp^[yn shl 8 + x1] = 0 then mp^[Word(yn shl 8 + x1)] := NCol(p1 + p2, dxy, 2);
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if mp^[yn shl 8 + x2] = 0 then mp^[Word(yn shl 8 + x2)] := NCol(p3 + p4, dxy, 2);
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if mp^[y2 shl 8 + xn] = 0 then mp^[Word(y2 shl 8 + xn)] := NCol(p2 + p4, dxy, 2);
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mp^[Word(yn shl 8 + xn)] := NCol(p1 + p2 + p3 + p4, dxy, 4);
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Plasma(x1, y1, xn, yn);
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Plasma(xn, y1, x2, yn);
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Plasma(x1, yn, xn, y2);
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Plasma(xn, yn, x2, y2);
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end;
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end;
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procedure Draw(xp, yp, dir: Integer);
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var
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z, zobs : Integer;
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ix, iy, iy1, iyp, ixp : Integer;
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x, y : Integer;
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s, csf, snf, mpc, i, j: Integer;
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begin
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while dir < 0 do Inc(dir, SizeOf(fcos));
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while dir >= SizeOf(fcos) do Dec(dir, SizeOf(fcos));
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FillChar(rng, SizeOf(rng), 200);
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FillChar(RGBBuffer^, SizeOf(RGBBuffer^), 0);
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zobs := 300 + mp^[Word(yp shl 8 + xp)];
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csf := fcos[dir];
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snf := fsin[dir];
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for iy := yp to yp+150 do
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begin
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iy1 := 1 + 2 * (iy - yp);
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s := 4 + 300 div iy1;
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for ix := xp + yp - iy to xp - yp + iy do
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begin
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ixp := xp + ((ix - xp) * csf + (iy - yp) * snf) shr 8;
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iyp := yp + ((iy - yp) * csf - (ix - xp) * snf) shr 8;
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x := 160 + 360 * (ix - xp) div iy1;
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if (x >= 0) and (x + s < 319) then
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begin
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z := mp^[Word(iyp shl 8 + ixp)];
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mpc := z shr 1;
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if z < 40 then z := 40;
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y := 100 + (zobs - z) * 30 div iy1;
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if (y < 200) and (y >= 0) then
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for j := x to x + s do
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if y < rng[j] then
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begin
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for i := y to rng[j] do
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RGBBuffer^[i - 1, j] := RGBPalette[mpc];
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rng[j] := y;
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end;
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end;
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end;
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end;
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end;
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procedure Paint;
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begin
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kos_begindraw();
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kos_definewindow(100, 100, WIDTH - 1, HEIGHT - 1, $01000000);
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kos_drawimage24(0, 0, WIDTH, HEIGHT, RGBBuffer);
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if Message <> '' then
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kos_drawtext(12, HEIGHT - 12 - 9, Message, $00FF00, $FF000000);
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kos_enddraw();
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end;
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function ReadKey: Char;
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var
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Event: Word;
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begin
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kos_maskevents(ME_PAINT or ME_KEYBOARD);
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repeat
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Event := kos_getevent();
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if Event = SE_PAINT then Paint;
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until Event = SE_KEYBOARD;
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Result := Chr(kos_getkey() shr 8);
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end;
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procedure Pause;
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begin
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kos_maskevents(ME_PAINT or ME_KEYBOARD);
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Message := MSG_PRESSKEY;
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Paint;
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ReadKey;
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end;
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var
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dir, i, j, x, y: Longint;
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C: Char;
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B: Byte;
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Terminate: Boolean;
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begin
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{ â ¡«¨æë § 票© á¨ãá ¨ ª®á¨ãá }
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for i := 0 to 359 do
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begin
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fcos[i] := Trunc(256 * Cos(i / 180 * Pi));
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fsin[i] := Trunc(256 * Sin(i / 180 * Pi));
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end;
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{ ᮧ¤ ¥¬ ¡ãä¥à á íä䥪⮬ "¯« §¬ " }
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New(mp);
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FillChar(mp^, SizeOf(mp^), 0);
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mp^[$0000] := 128;
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Plasma(0, 0, 256, 256);
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{ ᮧ¤ ¥¬ "¯ãá⮩" ¡ãä¥à ª ¤à }
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New(RGBBuffer);
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FillChar(RGBBuffer^, SizeOf(RGBBuffer^), 0);
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{ ¯à¥®¡à §®¢ ¨¥ ¯ «¨âàë ¨§ 63 ¢ 255 }
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for i := 0 to COLORS - 1 do
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begin
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B := Round(RGBPalette[i].R / 63 * 255);
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RGBPalette[i].R := Round(RGBPalette[i].B / 63 * 255);
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RGBPalette[i].G := Round(RGBPalette[i].G / 63 * 255);
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RGBPalette[i].B := B;
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end;
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for j := 0 to 199 do
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for i := 0 to 255 do
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RGBBuffer^[j, i + (WIDTH - 256) shr 1] := RGBPalette[sq(Pointer(mp)^)[j, i]];
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Pause;
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x := 0;
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y := 0;
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dir := 0;
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Message := MSG_USAGE;
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Terminate := False;
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while not Terminate do
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begin
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dir := dir mod 360;
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if dir < 0 then dir := 360 + dir;
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Draw(x, y, dir);
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Paint;
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C := ReadKey;
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if C = #$B0 then Dec(dir, 13) else
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if C = #$B3 then Inc(dir, 13) else
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if C = #$B2 then
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begin
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y := y + fcos[dir] shr 6;
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x := x + fsin[dir] shr 6;
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end else
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if C = #$B1 then
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begin
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y := y - fcos[dir] shr 6;
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x := x - fsin[dir] shr 6;
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end;
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if C = #27 then Terminate := True;
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end;
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end.
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