hedgewars/uGearUtils.pas
author nemo
Mon, 05 Dec 2011 18:38:25 -0500
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unit uGearUtils;
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interface
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uses uTypes;
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procedure doMakeExplosion(X, Y, Radius: LongInt; AttackingHog: PHedgehog; Mask: Longword; const Tint: LongWord = $FFFFFFFF); 
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implementation
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uses uGearsList;
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procedure doMakeExplosion(X, Y, Radius: LongInt; AttackingHog: PHedgehog; Mask: Longword; const Tint: LongWord);
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var Gear: PGear;
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    dmg, dmgRadius, dmgBase: LongInt;
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    fX, fY: hwFloat;
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    vg: PVisualGear;
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    i, cnt: LongInt;
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begin
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    if Radius > 4 then AddFileLog('Explosion: at (' + inttostr(x) + ',' + inttostr(y) + ')');
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    if Radius > 25 then KickFlakes(Radius, X, Y);
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    if ((Mask and EXPLNoGfx) = 0) then
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        begin
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        vg:= nil;
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        if Radius > 50 then vg:= AddVisualGear(X, Y, vgtBigExplosion)
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        else if Radius > 10 then vg:= AddVisualGear(X, Y, vgtExplosion);
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        if vg <> nil then
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            vg^.Tint:= Tint;
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        end;
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    if (Mask and EXPLAutoSound) <> 0 then PlaySound(sndExplosion);
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    if (Mask and EXPLAllDamageInRadius) = 0 then
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        dmgRadius:= Radius shl 1
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    else
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        dmgRadius:= Radius;
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    dmgBase:= dmgRadius + cHHRadius div 2;
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    fX:= int2hwFloat(X);
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    fY:= int2hwFloat(Y);
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    Gear:= GearsList;
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    while Gear <> nil do
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        begin
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        dmg:= 0;
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        //dmg:= dmgRadius  + cHHRadius div 2 - hwRound(Distance(Gear^.X - int2hwFloat(X), Gear^.Y - int2hwFloat(Y)));
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        //if (dmg > 1) and
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        if (Gear^.State and gstNoDamage) = 0 then
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            begin
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            case Gear^.Kind of
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                gtHedgehog,
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                    gtMine,
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                    gtBall,
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                    gtMelonPiece,
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                    gtGrenade,
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                    gtClusterBomb,
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                //    gtCluster, too game breaking I think
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                    gtSMine,
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                    gtCase,
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                    gtTarget,
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                    gtFlame,
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                    gtExplosives,
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                    gtStructure: begin
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    // Run the calcs only once we know we have a type that will need damage
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                            if hwRound(hwAbs(Gear^.X-fX)+hwAbs(Gear^.Y-fY)) < dmgBase then
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                                dmg:= dmgBase - max(hwRound(Distance(Gear^.X - fX, Gear^.Y - fY)),Gear^.Radius);
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                            if dmg > 1 then
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                                begin
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                                dmg:= ModifyDamage(min(dmg div 2, Radius), Gear);
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                                //AddFileLog('Damage: ' + inttostr(dmg));
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                                if (Mask and EXPLNoDamage) = 0 then
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                                    begin
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                                    if not Gear^.Invulnerable then
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                                        ApplyDamage(Gear, AttackingHog, dmg, dsExplosion)
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                                    else
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                                        Gear^.State:= Gear^.State or gstWinner;
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                                    end;
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                                if ((Mask and EXPLDoNotTouchAny) = 0) and (((Mask and EXPLDoNotTouchHH) = 0) or (Gear^.Kind <> gtHedgehog)) then
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                                    begin
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                                    DeleteCI(Gear);
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                                    if Gear^.Kind <> gtHedgehog then
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                                        begin
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                                        Gear^.dX:= Gear^.dX + SignAs(_0_005 * dmg + cHHKick, Gear^.X - fX)/Gear^.Density;
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                                        Gear^.dY:= Gear^.dY + SignAs(_0_005 * dmg + cHHKick, Gear^.Y - fY)/Gear^.Density;
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                                        end
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                                    else
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                                        begin
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                                        Gear^.dX:= Gear^.dX + SignAs(_0_005 * dmg + cHHKick, Gear^.X - fX);
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                                        Gear^.dY:= Gear^.dY + SignAs(_0_005 * dmg + cHHKick, Gear^.Y - fY);
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                                        end;
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                                    Gear^.State:= (Gear^.State or gstMoving) and (not gstLoser);
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                                    if not Gear^.Invulnerable then
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                                        Gear^.State:= (Gear^.State or gstMoving) and (not gstWinner);
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                                    Gear^.Active:= true;
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                                    if Gear^.Kind <> gtFlame then FollowGear:= Gear
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                                    end;
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                                if ((Mask and EXPLPoisoned) <> 0) and (Gear^.Kind = gtHedgehog) and (not Gear^.Invulnerable) then
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                                    Gear^.Hedgehog^.Effects[hePoisoned] := true;
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                                end;
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                            end;
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                    gtGrave: begin
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    // Run the calcs only once we know we have a type that will need damage
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                            if hwRound(hwAbs(Gear^.X-fX)+hwAbs(Gear^.Y-fY)) < dmgBase then
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                                dmg:= dmgBase - hwRound(Distance(Gear^.X - fX, Gear^.Y - fY));
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                            if dmg > 1 then
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                                begin
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                                dmg:= ModifyDamage(min(dmg div 2, Radius), Gear);
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                                Gear^.dY:= - _0_004 * dmg;
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                                Gear^.Active:= true
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                                end
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                            end;
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                end;
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            end;
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        Gear:= Gear^.NextGear
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        end;
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    if (Mask and EXPLDontDraw) = 0 then
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        if (GameFlags and gfSolidLand) = 0 then
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            begin
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            cnt:= DrawExplosion(X, Y, Radius) div 1608; // approx 2 16x16 circles to erase per chunk
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            if (cnt > 0) and (SpritesData[sprChunk].Texture <> nil) then
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                for i:= 0 to cnt do
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                    AddVisualGear(X, Y, vgtChunk)
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            end;
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    uAIMisc.AwareOfExplosion(0, 0, 0)
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end;
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end.