(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2014 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 *)

{$INCLUDE "options.inc"}

unit uVisualGears;

(*

 * This unit defines the behavior and the appearance of visual gears.

 *

 * Visual gears are "things"/"objects" in the game that do not need to be

 * perfectly synchronized over all clients since their effect is only

 * of visual nature.

 *

 * E.g.: background flakes, visual effects: explosion, smoke trails, etc.

 *)

interface

uses uConsts, GLunit, uTypes;

procedure initModule;

procedure freeModule;

procedure ProcessVisualGears(Steps: Longword);

procedure DrawVisualGears(Layer: LongWord);

procedure AddClouds;

procedure AddFlakes;

procedure AddDamageTag(X, Y, Damage, Color: LongWord);

procedure ChangeToSDClouds;

procedure ChangeToSDFlakes;

procedure KickFlakes(Radius, X, Y: LongInt);

implementation

uses uVariables, uRender, Math, uRenderUtils, uUtils

    , uVisualGearsList;

procedure AddDamageTag(X, Y, Damage, Color: LongWord);

var Gear: PVisualGear;

begin

if cAltDamage then

    begin

    Gear:= AddVisualGear(X, Y, vgtSmallDamageTag);

    if Gear <> nil then

        with Gear^ do

            Tex:= RenderStringTex(ansistring(inttostr(Damage)), Color, fntSmall);

    end

end;

// ==================================================================

procedure ProcessVisualGears(Steps: Longword);

var Gear, t: PVisualGear;

    i: LongWord;

begin

if Steps = 0 then

    exit;

for i:= 0 to 6 do

    begin

    t:= VisualGearLayers[i];

    while t <> nil do

        begin

        Gear:= t;

        t:= Gear^.NextGear;

        Gear^.doStep(Gear, Steps)

        end;

    end

end;

procedure KickFlakes(Radius, X, Y: LongInt);

var Gear, t: PVisualGear;

    dmg, i: LongInt;

begin

if (vobCount = 0) or (vobCount > 200) then

    exit;

for i:= 2 to 6 do

    if i <> 3 then

        begin

        t:= VisualGearLayers[i];

        while t <> nil do

            begin

            Gear:= t;

            if Gear^.Kind = vgtFlake then

                begin

                // Damage calc from doMakeExplosion

                dmg:= Min(101, Radius + cHHRadius div 2 - LongInt(abs(round(Gear^.X) - X) + abs(round(Gear^.Y) - Y)) div 5);

                if dmg > 1 then

                    begin

                    Gear^.tdX:= 0.02 * dmg + 0.01;

                    if Gear^.X - X < 0 then

                        Gear^.tdX := -Gear^.tdX;

                    Gear^.tdY:= 0.02 * dmg + 0.01;

                    if Gear^.Y - Y < 0 then

                        Gear^.tdY := -Gear^.tdY;

                    Gear^.Timer:= 200

                    end

                end;

            t:= Gear^.NextGear

            end

        end

end;

function GetSprite(sprite, SDsprite: TSprite): TSprite; inline;

begin

    if SuddenDeathDmg then

        exit(SDsprite)

    else

        exit(sprite);

end;

function GetSpriteData(sprite, SDsprite: TSprite): PSpriteData; inline;

begin

    exit(@SpritesData[GetSprite(sprite, SDsprite)]);

end;

procedure DrawVisualGears(Layer: LongWord);

var Gear: PVisualGear;

    tinted: boolean;

    tmp: real;

    i: LongInt;

    sprite: TSprite;

    spriteData: PSpriteData;

begin

case Layer of

    // this layer is very distant in the background when stereo

    0: begin

        Gear:= VisualGearLayers[0];

        while Gear <> nil do

            begin

            if Gear^.Tint <> $FFFFFFFF then Tint(Gear^.Tint);

            case Gear^.Kind of

              vgtCloud: begin

                        spriteData:= GetSpriteData(sprCloud, sprSDCloud);

                        DrawTextureF(spriteData^.Texture, Gear^.Scale, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, spriteData^.Width, spriteData^.Height)

                        end;

               vgtFlake: begin

                         sprite:= GetSprite(sprFlake, sprSDFlake);

                         if cFlattenFlakes then

                             begin

                             if vobSDVelocity = 0 then

                                 DrawSprite(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame)

                             else

                                 DrawSpriteRotatedF(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, Gear^.Angle);

                             end

                         else

                             begin

                             if vobSDVelocity = 0 then

                                 DrawTextureF(SpritesData[sprite].Texture, Gear^.Scale, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, SpritesData[sprFlake].Width, SpritesData[sprFlake].Height)

                             else

                                 DrawTextureRotatedF(SpritesData[sprite].Texture, Gear^.Scale, 0, 0, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, SpritesData[sprFlake].Width, SpritesData[sprFlake].Height, Gear^.Angle);

                             end;

                         end;

               end;

           if Gear^.Tint <> $FFFFFFFF then

               untint;

           Gear:= Gear^.NextGear

           end

       end;

    // this layer is on the land level (which is close but behind the screen plane) when stereo

    1: begin

       Gear:= VisualGearLayers[1];

       while Gear <> nil do

          begin

          //tinted:= false;

          if Gear^.Tint <> $FFFFFFFF then

              Tint(Gear^.Tint);

          case Gear^.Kind of

              vgtFlake: begin

                         sprite:= GetSprite(sprFlake, sprSDFlake);

                         if vobSDVelocity = 0 then

                             DrawSprite(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame)

                         else

                             DrawSpriteRotatedF(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, Gear^.Angle);

                        end;

              vgtSmokeTrace: if Gear^.State < 8 then

                  DrawSprite(sprSmokeTrace, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.State);

              vgtEvilTrace: if Gear^.State < 8 then

                  DrawSprite(sprEvilTrace, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.State);

              vgtLineTrail: DrawLine(Gear^.X, Gear^.Y, Gear^.dX, Gear^.dY, 1.0, $FF, min(Gear^.Timer, $C0), min(Gear^.Timer, $80), min(Gear^.Timer, $FF));

          end;

          if (cReducedQuality and rqAntiBoom) = 0 then

              case Gear^.Kind of

                  vgtSmoke: DrawTextureF(SpritesData[sprSmoke].Texture, Gear^.scale, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, 7 - Gear^.Frame, 1, SpritesData[sprSmoke].Width, SpritesData[sprSmoke].Height);

                  vgtSmokeWhite: DrawSprite(sprSmokeWhite, round(Gear^.X) + WorldDx - 11, round(Gear^.Y) + WorldDy - 11, 7 - Gear^.Frame);

                  vgtDust: if Gear^.State = 1 then

                               DrawSpriteRotatedF(sprSnowDust, round(Gear^.X) + WorldDx - 11, round(Gear^.Y) + WorldDy - 11, 7 - Gear^.Frame, Gear^.Tag, Gear^.Angle)

                           else

                               DrawSpriteRotatedF(sprDust, round(Gear^.X) + WorldDx - 11, round(Gear^.Y) + WorldDy - 11, 7 - Gear^.Frame, Gear^.Tag, Gear^.Angle);

                  vgtFire: if (Gear^.State and gstTmpFlag) = 0 then

                               DrawSprite(sprFlame, round(Gear^.X) + WorldDx - 8, round(Gear^.Y) + WorldDy, (RealTicks shr 6 + Gear^.Frame) mod 8)

                           else

                               DrawTextureF(SpritesData[sprFlame].Texture, Gear^.FrameTicks / 900, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, (RealTicks shr 7 + Gear^.Frame) mod 8, 1, 16, 16);

                  vgtSplash: begin

                             spriteData:= GetSpriteData(sprSplash, sprite);

                             if Gear^.Angle <> 0 then

                                DrawTextureRotatedF(spriteData^.Texture, Gear^.scale, 0, 0, round(Gear^.X + WorldDx + (((spriteData^.Height+8)*Gear^.Scale)/2) * (Gear^.Angle / abs(Gear^.Angle))), round(Gear^.Y + WorldDy), 19 - (Gear^.FrameTicks div Gear^.Timer div 37), 1, spriteData^.Width, spriteData^.Height, Gear^.Angle)

                             else

                                //DrawSprite(sprite, round(Gear^.X) + WorldDx - 40, round(Gear^.Y) + WorldDy - 58, 19 - (Gear^.FrameTicks div 37))

                                DrawTextureF(spriteData^.Texture, Gear^.scale, round(Gear^.X + WorldDx), round(Gear^.Y + WorldDy - ((spriteData^.Height+8)*Gear^.Scale)/2), 19 - (Gear^.FrameTicks div Gear^.Timer div 37), 1, spriteData^.Width, spriteData^.Height);

                             end;

                  vgtDroplet: begin

                              sprite:= GetSprite(sprDroplet, sprSDDroplet);

                              DrawSprite(sprite, round(Gear^.X) + WorldDx - 8, round(Gear^.Y) + WorldDy - 8, Gear^.Frame);

                              end;

                  vgtBubble: DrawSprite(sprBubbles, round(Gear^.X) + WorldDx - 8, round(Gear^.Y) + WorldDy - 8, Gear^.Frame);//(RealTicks div 64 + Gear^.Frame) mod 8);

               vgtStraightShot: begin

                                if Gear^.dX < 0 then

                                    i:= -1

                                else

                                    i:= 1;

                                DrawTextureRotatedF(SpritesData[TSprite(Gear^.State)].Texture, Gear^.Scale, 0, 0, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Frame, i, SpritesData[TSprite(Gear^.State)].Width, SpritesData[TSprite(Gear^.State)].Height, Gear^.Angle);

                                end;

              end;

          //if (Gear^.Tint <> $FFFFFFFF) or tinted then untint;

          if (Gear^.Tint <> $FFFFFFFF) then

              untint;

          Gear:= Gear^.NextGear

          end

       end;

    // this layer is on the screen plane (depth = 0) when stereo

    3: begin

       Gear:= VisualGearLayers[3];

       while Gear <> nil do

           begin

           tinted:= false;

           if Gear^.Tint <> $FFFFFFFF then

               Tint(Gear^.Tint);

           case Gear^.Kind of

(*

              vgtFlake: begin

                        sprite:= GetSprite(sprFlake, sprSDFlake);

                        if vobSDVelocity = 0 then

                            DrawSprite(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame)

                        else

                            DrawSpriteRotatedF(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, Gear^.Angle)

                        end;*)

               vgtSpeechBubble: begin

                                if (Gear^.Tex <> nil) and (((Gear^.State = 0) and (Gear^.Hedgehog <> nil) and (Gear^.Hedgehog^.Team <> CurrentTeam)) or (Gear^.State = 1)) then

                                    begin

                                    tinted:= true;

                                    Tint($FF, $FF, $FF,  $66);

                                    DrawTextureCentered(round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Tex)

                                    end

                                else if (Gear^.Tex <> nil) and (((Gear^.State = 0) and ((Gear^.Hedgehog = nil) or (Gear^.Hedgehog^.Team = CurrentTeam))) or (Gear^.State = 2)) then

                                    DrawTextureCentered(round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Tex);

                                end;

               vgtSmallDamageTag: DrawTextureCentered(round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Tex);

               vgtHealthTag: if Gear^.Tex <> nil then

                               begin

                               if Gear^.Frame = 0 then

                                   DrawTextureCentered(round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Tex)

                               else

                                   begin

                                   SetScale(cDefaultZoomLevel);

                                   if Gear^.Angle = 0 then

                                       DrawTexture(round(Gear^.X), round(Gear^.Y), Gear^.Tex)

                                   else

                                       DrawTexture(round(Gear^.X), round(Gear^.Y), Gear^.Tex, Gear^.Angle);

                                   SetScale(zoom)

                                   end

                               end;

               vgtStraightShot: begin

                                if Gear^.dX < 0 then

                                    i:= -1

                                else

                                    i:= 1;

                                DrawTextureRotatedF(SpritesData[TSprite(Gear^.State)].Texture, Gear^.Scale, 0, 0, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Frame, i, SpritesData[TSprite(Gear^.State)].Width, SpritesData[TSprite(Gear^.State)].Height, Gear^.Angle);

                                end;

           end;

           if (cReducedQuality and rqAntiBoom) = 0 then

               case Gear^.Kind of

                   vgtChunk: DrawSpriteRotatedF(sprChunk, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Frame, 1, Gear^.Angle);

               end;

           if (Gear^.Tint <> $FFFFFFFF) or tinted then

               untint;

           Gear:= Gear^.NextGear

           end

       end;

    // this layer is outside the screen when stereo

    2: begin

       Gear:= VisualGearLayers[2];

       while Gear <> nil do

           begin

           tinted:= false;

           if Gear^.Tint <> $FFFFFFFF then

               Tint(Gear^.Tint);

           case Gear^.Kind of

               vgtExplosion: DrawSprite(sprExplosion50, round(Gear^.X) - 32 + WorldDx, round(Gear^.Y) - 32 + WorldDy, Gear^.State);

               vgtBigExplosion: begin

                                tinted:= true;

                                Tint($FF, $FF, $FF, round($FF * (1 - power(Gear^.Timer / 250, 4))));

                                DrawTextureRotatedF(SpritesData[sprBigExplosion].Texture, 0.85 * (-power(2, -10 * Int(Gear^.Timer)/250) + 1) + 0.4, 0, 0, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, 0, 1, 385, 385, Gear^.Angle);

                                end;

           end;

           if (cReducedQuality and rqAntiBoom) = 0 then

               case Gear^.Kind of

                   vgtExplPart: DrawSprite(sprExplPart, round(Gear^.X) + WorldDx - 16, round(Gear^.Y) + WorldDy - 16, 7 - Gear^.Frame);

                   vgtExplPart2: DrawSprite(sprExplPart2, round(Gear^.X) + WorldDx - 16, round(Gear^.Y) + WorldDy - 16, 7 - Gear^.Frame);

                   vgtSteam: DrawSprite(sprSmokeWhite, round(Gear^.X) + WorldDx - 11, round(Gear^.Y) + WorldDy - 11, 7 - Gear^.Frame);

                   vgtAmmo: begin

                            tinted:= true;

                            Tint($FF, $FF, $FF, round(Gear^.alpha * $FF));

                            DrawTextureF(ropeIconTex, Gear^.scale, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, 0, 1, 32, 32);

                            DrawTextureF(SpritesData[sprAMAmmos].Texture, Gear^.scale * 0.90, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Frame - 1, 1, 32, 32);

                            end;

                   vgtShell: begin

                             if Gear^.FrameTicks < $FF then

                                 begin

                                 Tint($FF, $FF, $FF, Gear^.FrameTicks);

                                 tinted:= true

                                 end;

                             DrawSpriteRotatedF(sprShell, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Frame, 1, Gear^.Angle);

                             end;

                   vgtFeather: begin

                               if Gear^.FrameTicks < 255 then

                                   begin

                                   Tint($FF, $FF, $FF, Gear^.FrameTicks);

                                   tinted:= true

                                   end;

                               DrawSpriteRotatedF(sprFeather, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Frame, 1, Gear^.Angle);

                             end;

                   vgtEgg: DrawSpriteRotatedF(sprEgg, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Frame, 1, Gear^.Angle);

                   vgtBeeTrace: begin

                                if Gear^.FrameTicks < $FF then

                                    Tint($FF, $FF, $FF, Gear^.FrameTicks div 2)

                                else

                                    Tint($FF, $FF, $FF, $80);

                                tinted:= true;

                                DrawSpriteRotatedF(sprBeeTrace, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Frame, 1, (RealTicks shr 4) mod cMaxAngle);

                                end;

                   vgtSmokeRing: begin

                                 tinted:= true;

                                 Tint($FF, $FF, $FF, round(Gear^.alpha * $FF));

                                 DrawTextureRotatedF(SpritesData[sprSmokeRing].Texture, Gear^.scale, 0, 0, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, 0, 1, 200, 200, Gear^.Angle);

                                 end;

                   vgtNote: DrawSpriteRotatedF(sprNote, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Frame, 1, Gear^.Angle);

                   vgtBulletHit: DrawSpriteRotatedF(sprBulletHit, round(Gear^.X) + WorldDx - 0, round(Gear^.Y) + WorldDy - 0, 7 - (Gear^.FrameTicks div 50), 1, Gear^.Angle);

               end;

           case Gear^.Kind of

               vgtFlake: begin

                         spriteData:= GetSpriteData(sprFlake, sprSDFlake);

                         if vobSDVelocity = 0 then

                             DrawTextureF(spriteData^.Texture, Gear^.Scale, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, spriteData^.Width, spriteData^.Height)

                         else

                             DrawTextureRotatedF(spriteData^.Texture, Gear^.Scale, 0, 0, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, spriteData^.Width, spriteData^.Height, Gear^.Angle);

                         end;

               vgtCircle: if gear^.Angle = 1 then

                              begin

                              tmp:= Gear^.State / 100;

                              DrawTexture(round(Gear^.X-24*tmp) + WorldDx, round(Gear^.Y-24*tmp) + WorldDy, SpritesData[sprVampiric].Texture, tmp)

                              end

                          else

                              DrawCircle(round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.State, Gear^.Timer);

           end;

           if (Gear^.Tint <> $FFFFFFFF) or tinted then

               untint;

           Gear:= Gear^.NextGear

           end

       end;

     // this layer is half-way between the screen plane (depth = 0) when in stereo, and the land

     4: begin

        Gear:= VisualGearLayers[4];

        while Gear <> nil do

            begin

            if Gear^.Tint <> $FFFFFFFF then

                Tint(Gear^.Tint);

            case Gear^.Kind of

               vgtCloud: begin

                         spriteData:= GetSpriteData(sprCloud, sprSDCloud);

                         DrawTextureF(spriteData^.Texture, Gear^.Scale, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, spriteData^.Width, spriteData^.Height);

                         end;

              vgtFlake: begin

                        spriteData:= GetSpriteData(sprFlake, sprSDFlake);

                        if vobSDVelocity = 0 then

                            DrawTextureF(spriteData^.Texture, Gear^.Scale, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, spriteData^.Width, spriteData^.Height)

                        else

                            DrawTextureRotatedF(spriteData^.Texture, Gear^.Scale, 0, 0, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, spriteData^.Width, spriteData^.Height, Gear^.Angle);

                        end;

            end;

            if (Gear^.Tint <> $FFFFFFFF) then

                untint;

            Gear:= Gear^.NextGear

            end

        end;

     // this layer is on the screen plane (depth = 0) when stereo, but just behind the land

     5: begin

        Gear:= VisualGearLayers[5];

        while Gear <> nil do

            begin

            if Gear^.Tint <> $FFFFFFFF then

                Tint(Gear^.Tint);

            case Gear^.Kind of

                vgtCloud: begin

                          sprite:= GetSprite(sprCloud, sprSDCloud);

                          DrawSprite(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame);

                          end;

              vgtFlake: begin

                        sprite:= GetSprite(sprFlake, sprSDFlake);

                        if vobSDVelocity = 0 then

                            DrawSprite(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame)

                        else

                            DrawSpriteRotatedF(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, Gear^.Angle);

                        end;

                end;

            if (Gear^.Tint <> $FFFFFFFF) then

                untint;

            Gear:= Gear^.NextGear

            end

        end;

     // this layer is on the screen plane (depth = 0) when stereo, but just in front of the land

    6: begin

        Gear:= VisualGearLayers[6];

        while Gear <> nil do

            begin

            if Gear^.Tint <> $FFFFFFFF then

                Tint(Gear^.Tint);

            case Gear^.Kind of

                vgtFlake: begin

                          sprite:= GetSprite(sprFlake, sprSDFlake);

                          if vobSDVelocity = 0 then

                              DrawSprite(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame)

                          else

                              DrawSpriteRotatedF(sprite, round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy + SkyOffset, Gear^.Frame, 1, Gear^.Angle)

                          end;

                vgtNoPlaceWarn:

                            DrawTexture(round(Gear^.X) + WorldDx - round(Gear^.Tex^.w * Gear^.Scale) div 2, round(Gear^.Y) + WorldDy - round(Gear^.Tex^.h * Gear^.Scale) div 2, Gear^.Tex, Gear^.Scale);

                end;

            if (Gear^.Tint <> $FFFFFFFF) then

                untint;

            Gear:= Gear^.NextGear

            end

        end;

    end;

end;

procedure AddClouds;

var i: LongInt;

begin

for i:= 0 to cCloudsNumber - 1 do

    AddVisualGear(cLeftScreenBorder + i * LongInt(cScreenSpace div (cCloudsNumber + 1)), LAND_HEIGHT-1184, vgtCloud)

end;

procedure ChangeToSDClouds;

var       i: LongInt;

    vg, tmp: PVisualGear;

begin

if cCloudsNumber = cSDCloudsNumber then

    exit;

vg:= VisualGearLayers[0];

while vg <> nil do

    if vg^.Kind = vgtCloud then

        begin

        tmp:= vg^.NextGear;

        DeleteVisualGear(vg);

        vg:= tmp

        end

    else vg:= vg^.NextGear;

for i:= 0 to cSDCloudsNumber - 1 do

    AddVisualGear(cLeftScreenBorder + i * LongInt(cScreenSpace div (cSDCloudsNumber + 1)), LAND_HEIGHT-1184, vgtCloud)

end;

procedure AddFlakes;

var i: LongInt;

begin

if (cReducedQuality and rqKillFlakes) <> 0 then

    exit;