(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2015 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 uVisualGearsList;

interface

uses uTypes;

function  AddVisualGear(X, Y: LongInt; Kind: TVisualGearType): PVisualGear; inline;

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

function  AddVisualGear(X, Y: LongInt; Kind: TVisualGearType; State: LongWord; Critical: Boolean): PVisualGear; inline;

function  AddVisualGear(X, Y: LongInt; Kind: TVisualGearType; State: LongWord; Critical: Boolean; Layer: LongInt): PVisualGear;

procedure DeleteVisualGear(Gear: PVisualGear);

function  VisualGearByUID(uid : Longword) : PVisualGear;

const

    cExplFrameTicks = 110;

var VGCounter: LongWord;

    VisualGearLayers: array[0..6] of PVisualGear;

implementation

uses uCollisions, uFloat, uVariables, uConsts, uTextures, uVisualGearsHandlers, uScript;

function AddVisualGear(X, Y: LongInt; Kind: TVisualGearType): PVisualGear; inline;

begin

    // adjust some visual gear types if underwater

    if CheckCoordInWater(X, Y) and ((Kind = vgtBeeTrace) or (Kind = vgtSmokeTrace) or (Kind = vgtEvilTrace)) then

        Kind:= vgtBubble;

    AddVisualGear:= AddVisualGear(X, Y, Kind, 0, false, -1);

end;

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

begin

    AddVisualGear:= AddVisualGear(X, Y, Kind, State, false, -1);

end;

function  AddVisualGear(X, Y: LongInt; Kind: TVisualGearType; State: LongWord; Critical: Boolean): PVisualGear; inline;

begin

    AddVisualGear:= AddVisualGear(X, Y, Kind, State, Critical, -1);

end;

function  AddVisualGear(X, Y: LongInt; Kind: TVisualGearType; State: LongWord; Critical: Boolean; Layer: LongInt): PVisualGear;

var gear: PVisualGear;

    t: Longword;

    sp: real;

begin

AddVisualGear:= nil;

if cOnlyStats then exit;  // stats only should never ever create a visual gear

if (GameType <> gmtRecord) and

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

   (not Critical)) then

       exit;

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

   (not Critical) and

   (not (Kind in

   [vgtTeamHealthSorter,

    vgtSmallDamageTag,

    vgtSpeechBubble,

    vgtHealthTag,

    vgtExplosion,

    vgtSmokeTrace,

    vgtEvilTrace,

    vgtNote,

    vgtFeather,

    vgtSmoothWindBar])) then

        exit;

// 0.9.24.2 workaround for minigun droplet spam.

// Limit the max. number of droplets.

if ((Kind = vgtDroplet) or (Kind = vgtSplash)) and (numDroplets > maxDroplets) and (not Critical) then

    exit;

inc(VGCounter);

New(gear);

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

gear^.X:= real(X);

gear^.Y:= real(Y);

gear^.Kind := Kind;

gear^.doStep:= doStepVGHandlers[Kind];

gear^.Tint:= $FFFFFFFF;

gear^.uid:= VGCounter;

with gear^ do

    case Kind of

    vgtFlake:

                begin

                Timer:= 0;

                tdX:= 0;

                tdY:= 0;

                Scale:= 1.0;

                if SuddenDeathDmg then

                    begin

                    if vobSDFrameTicks > 0 then

                        FrameTicks:= random(vobSDFrameTicks);

                    Frame:= random(vobSDFramesCount);

                    end

                else

                    begin

                    if vobFrameTicks > 0 then

                        FrameTicks:= random(vobFrameTicks);

                    Frame:= random(vobFramesCount);

                    end;

                Angle:= random(360);

                dx:= 0.0000038654705 * random(10000);

                dy:= 0.000003506096 * random(7000);

                if random(2) = 0 then

                    dx := -dx;

                if SuddenDeathDmg then

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

                else

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

                Scale:= 1.0

                end;

    vgtExplPart,

    vgtExplPart2:

                begin

                t:= random(1024);

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

                dx:= hwFloat2Float(AngleSin(t)) * sp;

                dy:= hwFloat2Float(AngleCos(t)) * 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:= hwFloat2Float(AngleSin(t)) * sp;

                dy:= hwFloat2Float(AngleCos(t)) * 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:= hwFloat2Float(AngleSin(t)) * sp;

                dy:= hwFloat2Float(AngleCos(t)) * 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

                Scale:= 1.0;

                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;

  vgtDust:

                begin

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

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

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

                if random(2) = 0 then Tag:= 1

                else Tag:= -1;

                Frame:= 7 - random(2);

                FrameTicks:= random(20) + 15;

                end;

  vgtSplash:

                begin

                dx:= 0;

                dy:= 0;

                FrameTicks:= 740;

                Frame:= 19;

                Scale:= 0.75;

                Timer:= 1;

                end;

    vgtDroplet:

                begin

                // droplet counter for 0.9.24.2 bugfix

                inc(numDroplets);

                // old dx & dy calcs

                // dx:= 0.001 * (random(180) - 90);

                // dy:= -0.001 * (random(160) + 40);

                // => min speed ~ 0.098, max speed ~ 0.218, speed range ~ 0.120

                // => min angle(4096) ~ 129, max angle ~ 1919, angle range ~ 1790

                dx:= 0.001 * (98 + random(121)); // speed

                Frame:= 129 + random(1791); // angle

                dy:= -dx * hwFloat2Float(AngleSin(Frame));

                // divide by 2 to create an eliptic shape

                dx:=  dx * hwFloat2Float(AngleCos(Frame)) / 2;

                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:= hwFloat2Float(AngleSin(t)) * sp;

                dy:= hwFloat2Float(AngleCos(t)) * sp;

                if random(2) = 0 then

                    dx := -dx;

                if random(2) = 0 then

                    dy := -dy;

                FrameTicks:= 650 + random(250);

                Frame:= 1

                end;

  vgtHealthTag:

                begin

                Frame:= 0;

                Timer:= 1500;

                dY:= -0.08;

                dX:= 0;

                //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:= hwFloat2Float(AngleSin(t)) * sp;

                dy:= hwFloat2Float(AngleCos(t)) * 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;

  vgtBulletHit:

                begin

                dx:= 0;

                dy:= 0;

                FrameTicks:= 350;

                Frame:= 7;

                Angle:= 0;

                end;

vgtSmoothWindBar:

                begin

                Angle:= hwFloat2Float(cMaxWindSpeed)*2 / 1440; // seems rate below is supposed to change wind bar at 1px per 10ms. Max time, 1440ms. This tries to match the rate of change

                Tag:= hwRound(cWindSpeed * 72 / cMaxWindSpeed);

                end;

 vgtStraightShot:

                begin

                Angle:= 0;

                Scale:= 1.0;

                dx:= 0.001 * random(45);

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

                State:= ord(sprHealth);

                if random(2) = 0 then

                    dx := -dx;

                Frame:= 0;

                FrameTicks:= random(750) + 1250;

                State:= ord(sprSnowDust);

                end;

  vgtNoPlaceWarn:

                begin

                FrameTicks:= 2000;

                Tint:= $FF0000FF;

                Scale:= 1.0;

                end;

        end;

if State <> 0 then

    gear^.State:= State;

case Gear^.Kind of

    vgtFlake: 

              if random(3) = 0 then

                  begin

                  gear^.Scale:= 0.5;

                  gear^.Layer:= 0   // 33% - far back

                  end

              else if random(3) = 0 then

                  begin

                  gear^.Scale:= 0.8;

                  gear^.Layer:= 4   // 22% - mid-distance

                  end

              else if random(3) <> 0 then

                  gear^.Layer:= 5  // 30% - just behind land

              else if (not cFlattenFlakes) and (random(2) = 0) then

                  gear^.Layer:= 6   // 7% - just in front of land

              else if not cFlattenFlakes then

                  begin

                  gear^.Scale:= 1.5;

                  gear^.Layer:= 2  // 7% - close up

                  end

              else begin 

                   gear^.Layer:= 0;

                   gear^.Scale:= 0.5

                   end;

    vgtCloud: if cFlattenClouds then gear^.Layer:= 5

              else if random(3) = 0 then

                  begin

                  gear^.Scale:= 0.25;

                  gear^.Layer:= 0

                  end

              else if random(2) = 0 then

                  gear^.Layer:= 5

              else

                  begin

                  gear^.Scale:= 0.4;

                  gear^.Layer:= 4

                  end;

    vgtNoPlaceWarn: gear^.Layer:= 6;

    // 0: this layer is very distant in the background when in stereo

    vgtTeamHealthSorter,

    vgtSmoothWindBar: gear^.Layer:= 0;

    // 1: this layer is on the land level (which is close but behind the screen plane) when stereo

    vgtSmokeTrace,

    vgtEvilTrace,

    vgtLineTrail,

    vgtSmoke,

    vgtSmokeWhite,

    vgtDust,

    vgtFire,

    vgtSplash,

    vgtDroplet,

    vgtBubble: gear^.Layer:= 1;

    // 3: this layer is on the screen plane (depth = 0) when stereo

    vgtSpeechBubble,

    vgtSmallDamageTag,

    vgtHealthTag,

    vgtStraightShot,

    vgtFeather,

    vgtChunk: gear^.Layer:= 3;

    // 2: this layer is outside the screen when stereo

    vgtExplosion,

    vgtBigExplosion,

    vgtExplPart,

    vgtExplPart2,

    vgtSteam,

    vgtAmmo,

    vgtShell,

    vgtEgg,

    vgtBeeTrace,

    vgtSmokeRing,

    vgtNote,

    vgtBulletHit,

    vgtCircle: gear^.Layer:= 2

end;

if Layer <> -1 then gear^.Layer:= Layer;

if VisualGearLayers[gear^.Layer] <> nil then

    begin

    VisualGearLayers[gear^.Layer]^.PrevGear:= gear;

    gear^.NextGear:= VisualGearLayers[gear^.Layer]

    end;

VisualGearLayers[gear^.Layer]:= gear;

AddVisualGear:= gear;

ScriptCall('onVisualGearAdd', gear^.uid);

end;

procedure DeleteVisualGear(Gear: PVisualGear);

begin

    ScriptCall('onVisualGearDelete', Gear^.uid);

    FreeAndNilTexture(Gear^.Tex);

    if Gear^.NextGear <> nil then

        Gear^.NextGear^.PrevGear:= Gear^.PrevGear;

    if Gear^.PrevGear <> nil then

        Gear^.PrevGear^.NextGear:= Gear^.NextGear

    else

        VisualGearLayers[Gear^.Layer]:= Gear^.NextGear;

    if lastVisualGearByUID = Gear then

        lastVisualGearByUID:= nil;

    if (Gear^.Kind = vgtDroplet) and (numDroplets > 0) then

        dec(numDroplets);

    Dispose(Gear);

end;

function  VisualGearByUID(uid : Longword) : PVisualGear;

var vg: PVisualGear;

    i: LongWord;

begin

VisualGearByUID:= nil;

if uid = 0 then

    exit;

if (lastVisualGearByUID <> nil) and (lastVisualGearByUID^.uid = uid) then

    begin

    VisualGearByUID:= lastVisualGearByUID;

    exit

    end;

// search in an order that is more likely to return layers they actually use.  Could perhaps track statistically AddVisualGear in uScript, since that is most likely the ones they want

for i:= 2 to 5 do

    begin

    vg:= VisualGearLayers[i mod 4];

    while vg <> nil do

        begin

        if vg^.uid = uid then

            begin

            lastVisualGearByUID:= vg;

            VisualGearByUID:= vg;

            exit

            end;

        vg:= vg^.NextGear

        end

    end

end;

end.