(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 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

 *)

{$INCLUDE "options.inc"}

unit uVisualGears;

interface

uses uConsts, uFloat, Math, GLunit;

type PVisualGear = ^TVisualGear;

    TVGearStepProcedure = procedure (Gear: PVisualGear; Steps: Longword);

    TVisualGear = record

        NextGear, PrevGear: PVisualGear;

        Frame,

        FrameTicks: Longword;

        X : float;

        Y : float;

        dX: float;

        dY: float;

        tdX: float;

        tdY: float;

        State : Longword;

        Timer: Longword;

        Angle, dAngle: real;

        Kind: TVisualGearType;

        doStep: TVGearStepProcedure;

        Tex: PTexture;

        alpha, scale: GLfloat;

        Hedgehog: pointer;

        Text: shortstring;

        Tint: Longword;

        end;

procedure initModule;

procedure freeModule;

function  AddVisualGear(X, Y: LongInt; Kind: TVisualGearType; State: LongWord = 0): PVisualGear;

procedure ProcessVisualGears(Steps: Longword);

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

procedure DrawVisualGears(Layer: LongWord);

procedure DeleteVisualGear(Gear: PVisualGear);

procedure AddClouds;

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

var VisualGearsList: PVisualGear;

    vobFrameTicks, vobFramesCount, vobCount: Longword;

    vobVelocity, vobFallSpeed: LongInt;

implementation

const cExplFrameTicks = 110;

{$INCLUDE "VGSHandlers.inc"}

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

var s: shortstring;

    Gear: PVisualGear;

begin

if cAltDamage then

    begin

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

    if Gear <> nil then

        with Gear^ do

            begin

            str(Damage, s);

            Tex:= RenderStringTex(s, Color, fntSmall);

            end

    end

end;

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

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

const doStepHandlers: array[TVisualGearType] of TVGearStepProcedure =

        (

            @doStepFlake,

            @doStepCloud,

            @doStepExpl,

            @doStepExpl,

            @doStepFire,

            @doStepSmallDamage,

            @doStepTeamHealthSorter,

            @doStepSpeechBubble,

            @doStepBubble,

            @doStepSteam,

            @doStepAmmo,

            @doStepSmoke,

            @doStepSmoke,

            @doStepHealth,

            @doStepShell,

            @doStepDust,

            @doStepSplash,

            @doStepDroplet,

            @doStepSmokeRing,

            @doStepBeeTrace,

            @doStepEgg,

            @doStepFeather,

            @doStepHealthTag,

            @doStepSmokeTrace,

            @doStepSmokeTrace,

            @doStepExplosion,

            @doStepBigExplosion,

            @doStepChunk,

            @doStepNote

        );

function  AddVisualGear(X, Y: LongInt; Kind: TVisualGearType; State: LongWord = 0): PVisualGear;

var gear: PVisualGear;

    t: Longword;

    sp: float;

begin

if (GameType = gmtSave) or (fastUntilLag and (GameType = gmtNet)) then // we are scrolling now

    if Kind <> vgtCloud then

        begin

        AddVisualGear:= nil;

        exit

        end;

if ((cReducedQuality and rqFancyBoom) <> 0) and

   not (Kind in

   [vgtTeamHealthSorter,

    vgtSmallDamageTag,

    vgtSpeechBubble,

    vgtHealthTag,

    vgtExplosion,

    vgtSmokeTrace,

    vgtEvilTrace,

    vgtNote]) then

    begin

      AddVisualGear:= nil;

      exit

    end;

New(gear);

FillChar(gear^, sizeof(TVisualGear), 0);

gear^.X:= float(X);

gear^.Y:= float(Y);

gear^.Kind := Kind;

gear^.doStep:= doStepHandlers[Kind];

gear^.State:= 0;

gear^.Tint:= $FFFFFFFF;

with gear^ do

    case Kind of

    vgtFlake: begin

                Timer:= 0;

                tdX:= 0;

                tdY:= 0;

                FrameTicks:= random(vobFrameTicks);

                Frame:= random(vobFramesCount);

                Angle:= random * 360;

                dx:= 0.0000038654705 * random(10000);

                dy:= 0.000003506096 * random(7000);

                if random(2) = 0 then dx := -dx;

                dAngle:= (random(2) * 2 - 1) * (1 + random) * vobVelocity / 1000

                end;

    vgtCloud: begin

                Frame:= random(4);

                dx:= 0.5 + 0.1 * random(5); // how much the cloud will be affected by wind

                timer:= random(4096);

                end;

    vgtExplPart,

    vgtExplPart2: begin

                t:= random(1024);

                sp:= 0.001 * (random(95) + 70);

                dx:= AngleSin(t).QWordValue/4294967296 * sp;

                dy:= AngleCos(t).QWordValue/4294967296 * sp;

                if random(2) = 0 then dx := -dx;

                if random(2) = 0 then dy := -dy;

                Frame:= 7 - random(3);

                FrameTicks:= cExplFrameTicks

                end;

        vgtFire: begin

                t:= random(1024);

                sp:= 0.001 * (random(85) + 95);

                dx:= AngleSin(t).QWordValue/4294967296 * sp;

                dy:= AngleCos(t).QWordValue/4294967296 * sp;

                if random(2) = 0 then dx := -dx;

                if random(2) = 0 then dy := -dy;

                FrameTicks:= 650 + random(250);

                Frame:= random(8)

                end;

         vgtEgg: begin

                t:= random(1024);

                sp:= 0.001 * (random(85) + 95);

                dx:= AngleSin(t).QWordValue/4294967296 * sp;

                dy:= AngleCos(t).QWordValue/4294967296 * sp;

                if random(2) = 0 then dx := -dx;

                if random(2) = 0 then dy := -dy;

                FrameTicks:= 650 + random(250);

                Frame:= 1

                end;

        vgtShell: FrameTicks:= 500;

    vgtSmallDamageTag: begin

                gear^.FrameTicks:= 1100

                end;

    vgtBubble: begin

                dx:= 0.0000038654705 * random(10000);

                dy:= 0;

                if random(2) = 0 then dx := -dx;

                FrameTicks:= 250 + random(1751);

                Frame:= random(5)

                end;

    vgtSteam: begin

                dx:= 0.0000038654705 * random(10000);

                dy:= 0.001 * (random(85) + 95);

                if random(2) = 0 then dx := -dx;

                Frame:= 7 - random(3);

                FrameTicks:= cExplFrameTicks * 2;

                end;

    vgtAmmo: begin

                alpha:= 1.0;

                scale:= 1.0

                end;

  vgtSmokeWhite,

  vgtSmoke: begin

                dx:= 0.0002 * (random(45) + 10);

                dy:= 0.0002 * (random(45) + 10);

                if random(2) = 0 then dx := -dx;

                Frame:= 7 - random(2);

                FrameTicks:= cExplFrameTicks * 2;

                end;

    vgtHealth: begin

                dx:= 0.001 * random(45);

                dy:= 0.001 * (random(20) + 25);

                if random(2) = 0 then dx := -dx;

                Frame:= 0;

                FrameTicks:= random(750) + 1250;

                end;

  vgtDust: begin

                dx:= 0.005 * (random(15) + 10);

                dy:= 0.001 * (random(40) + 20);

                if random(2) = 0 then dx := -dx;

                Frame:= 7 - random(2);

                FrameTicks:= random(20) + 15;

                end;

  vgtSplash: begin

                dx:= 0;

                dy:= 0;

                FrameTicks:= 740;

                Frame:= 19;

                end;

    vgtDroplet: begin

                dx:= 0.001 * (random(75) + 15);

                dy:= -0.001 * (random(80) + 120);

                if random(2) = 0 then dx := -dx;

                FrameTicks:= 250 + random(1751);

                Frame:= random(3)

                end;

   vgtBeeTrace: begin

                FrameTicks:= 1000;

                Frame:= random(16);

                end;

    vgtSmokeRing: begin

                dx:= 0;

                dy:= 0;

                FrameTicks:= 600;

                Timer:= 0;

                Frame:= 0;

                scale:= 0.6;

                alpha:= 1;

                angle:= random(360);

                end;

     vgtFeather: begin

                t:= random(1024);

                sp:= 0.001 * (random(85) + 95);

                dx:= AngleSin(t).QWordValue/4294967296 * sp;

                dy:= AngleCos(t).QWordValue/4294967296 * sp;

                if random(2) = 0 then dx := -dx;

                if random(2) = 0 then dy := -dy;

                FrameTicks:= 650 + random(250);

                Frame:= 1

                end;

  vgtHealthTag: begin

                gear^.Timer:= 1500;

                //gear^.Z:= 2002;

                end;

  vgtSmokeTrace,

  vgtEvilTrace: begin

                gear^.X:= gear^.X - 16;

                gear^.Y:= gear^.Y - 16;

                gear^.State:= 8;

                //gear^.Z:= cSmokeZ

                end;

vgtBigExplosion: begin

                gear^.Angle:= random(360);

                end;

      vgtChunk: begin

                gear^.Frame:= random(4);

                t:= random(1024);

                sp:= 0.001 * (random(85) + 47);

                dx:= AngleSin(t).QWordValue/4294967296 * sp;

                dy:= AngleCos(t).QWordValue/4294967296 * sp * -2;

                if random(2) = 0 then dx := -dx;

                end;

      vgtNote: begin

                dx:= 0.005 * (random(15) + 10);

                dy:= -0.001 * (random(40) + 20);

                if random(2) = 0 then dx := -dx;

                Frame:= random(4);

                FrameTicks:= random(2000) + 1500;

                end;

        end;

if State <> 0 then gear^.State:= State;

if VisualGearsList <> nil then

    begin

    VisualGearsList^.PrevGear:= gear;

    gear^.NextGear:= VisualGearsList

    end;

VisualGearsList:= gear;

AddVisualGear:= gear;

end;

procedure DeleteVisualGear(Gear: PVisualGear);

begin

    if Gear^.Tex <> nil then

        FreeTexture(Gear^.Tex);

    Gear^.Tex:= nil;

    if Gear^.NextGear <> nil then Gear^.NextGear^.PrevGear:= Gear^.PrevGear;

    if Gear^.PrevGear <> nil then Gear^.PrevGear^.NextGear:= Gear^.NextGear

    else VisualGearsList:= Gear^.NextGear;

    Dispose(Gear);

end;

procedure ProcessVisualGears(Steps: Longword);

var Gear, t: PVisualGear;

begin

if Steps = 0 then exit;

t:= VisualGearsList;

while t <> nil do

      begin

      Gear:= t;

      t:= Gear^.NextGear;

      Gear^.doStep(Gear, Steps)

      end

end;

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

var Gear, t: PVisualGear;

    dmg: LongInt;

begin

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

t:= VisualGearsList;

while t <> nil do

      begin

      Gear:= t;

      if Gear^.Kind = vgtFlake then

          begin

          // Damage calc from doMakeExplosion

          dmg:= min(101, int64(Radius) + cHHRadius div 2 - (round(abs(Gear^.X - float(X))+abs(Gear^.Y - float(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;

procedure DrawVisualGears(Layer: LongWord);

var Gear: PVisualGear;

begin

Gear:= VisualGearsList;

case Layer of

    0: while Gear <> nil do

        begin

        Tint(Gear^.Tint);

        case Gear^.Kind of

            vgtFlake: if vobVelocity = 0 then

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

                      else

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

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

            end;

        Gear:= Gear^.NextGear

        end;

    1: while Gear <> nil do

        begin

        Tint(Gear^.Tint);

        case Gear^.Kind of

            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);

        end;

            if (cReducedQuality and rqFancyBoom) = 0 then

                case Gear^.Kind of

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

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

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

                    vgtFeather: begin

                            if Gear^.FrameTicks < 255 then

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

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

                            end;

                 end;

        Gear:= Gear^.NextGear

        end;

    2: while Gear <> nil do

        begin

        Tint(Gear^.Tint);

        case Gear^.Kind of

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

            vgtBigExplosion: begin

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

                             DrawRotatedTextureF(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 rqFancyBoom) = 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);

                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);

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

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

                vgtAmmo: begin

                        Tint($FF, $FF, $FF, floor(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;

                vgtHealth:  begin

                            case Gear^.Frame div 10 of

                                0:Tint(0, $FF, 0, floor(Gear^.FrameTicks * $FF / 1000));

                                1:Tint($FF, 0, 0, floor(Gear^.FrameTicks * $FF / 1000));

                            end;

                            DrawSprite(sprHealth, round(Gear^.X) + WorldDx - 8, round(Gear^.Y) + WorldDy - 8, 0);

                            end;

                vgtShell: begin

                            if Gear^.FrameTicks < $FF then

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

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

                            end;

                  vgtEgg: begin

                            if Gear^.FrameTicks < $FF then

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

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

                            end;

                vgtSplash: DrawSprite(sprSplash, round(Gear^.X) + WorldDx - 40, round(Gear^.Y) + WorldDy - 58, 19 - (Gear^.FrameTicks div 37));

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

               vgtBeeTrace: begin

                            if Gear^.FrameTicks < $FF then

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

                            else

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

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

                            end;

                vgtSmokeRing: begin

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

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

                            end;

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

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

            end;

        case Gear^.Kind of

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

            vgtSpeechBubble: if Gear^.Tex <> nil then DrawCentered(round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Tex);

            vgtHealthTag: if Gear^.Tex <> nil then DrawCentered(round(Gear^.X) + WorldDx, round(Gear^.Y) + WorldDy, Gear^.Tex);