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/*
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  Better Falling Snow by Joe Wilcox
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  (c) 1997, Simply Silly Software
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  You need to add 3 sprites to your ART tiles and reference them below.
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  I've included our default sprites.. feel free to use them.
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  The 2 Snow Makers use their palettes to determine how often to spawn
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  snow.  It goes as follows:
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   Pal 0  : Lite Snow Storm
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   Pal 1  : Medium Snow Storm
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   Pal 2  : Very Lite Snow Storm
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   Pal 3  : Flurries
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   Pal 4  : Blizzard
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   The snowflake can be added by itself to give the appearance of it
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   already snowing.  SNOWMAKER will roam around the screen dropping a
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   flake every now and this.  This looks really good.  SNOWMAKERNOMOVE
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   stands in once place.  You want to use this for holes in ceilings and
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   other small areas.
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   There are some limitations:
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   These sprites move and will go through openings if it's open at the
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   level they are at.  It should however be easy to change them to
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   ACTOR STAYPUTs so they stay in their sectors.  That just didn't work
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   for me since I had alot of sectors that were small.
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   It seems you can't start a MAKER close to other sprites.  If you do, the
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   snow will get confused and stay on the ceiling.  It's really weird.
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   Oh.. I wouldn't put more than 15 or so in an area.. you will kill
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   yourself.
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--------------------------------------------------------------------------------
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Duke: Nuclear Winter
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By Joris Weimar
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 1997 Simply Silly Software
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--------------------------------------------------------------------------------
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Duke: Nuclear Winter Plus
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By Hendricks266
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--------------------------------------------------------------------------------
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*/
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// The Snowmaker is the actor that tosses out new snowflakes.
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action SNOWMAKE
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move SNOWMAKERMOVE 100 0  // Use this to adjust the speed at which the
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                          // SNOWMAKER's move
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ai AISNOWMAKERROAM SNOWMAKE SNOWMAKERMOVE getv geth randomangle
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useractor notenemy SNOWMAKER 0 0 randomangle
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    cstat 32768
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    // I start by spawning a snowflake.
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    ifai 0
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    {
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      spawn SNOWFLAKE
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      ai AISNOWMAKERROAM
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      break
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    }
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    // Anytime the maker stops.. bounce it again
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    ifnotmoving
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    {
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        ai AISNOWMAKERROAM
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    }
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    // the IFCOUNT sets the frequency that it drops snow
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    ifspritepal 0
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    {
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      ifcount 48
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      {
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        ifcansee
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          spawn SNOWFLAKE
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        ai AISNOWMAKERROAM
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        resetcount
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      }
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    }
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    ifspritepal 1
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    {
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      ifcount 32
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      {
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        ifcansee
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          spawn SNOWFLAKE
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        ai AISNOWMAKERROAM
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        resetcount
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      }
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    }
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    ifspritepal 2
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    {
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      ifcount 64
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      {
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        ifcansee
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          spawn SNOWFLAKE
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        ai AISNOWMAKERROAM
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        resetcount
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      }
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    }
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    ifspritepal 3
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    {
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      ifcount 96
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      {
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        ifcansee
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          spawn SNOWFLAKE
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        ai AISNOWMAKERROAM
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        resetcount
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      }
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    }
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    ifspritepal 4
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    {
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      ifcount 16
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      {
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        ifcansee
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          spawn SNOWFLAKE
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        ai AISNOWMAKERROAM
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        resetcount
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      }
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    }
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enda
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// The SnowMakerNoMove is the actor that tosses out snowflakes from a
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// single position.
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useractor notenemy SNOWMAKERNOMOVE 0 0 randomangle
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    cstat 32768
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    ifspritepal 0
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    {
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      ifcount 32
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      {
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        spawn SNOWFLAKE
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        resetcount
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      }
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    }
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    ifspritepal 1
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    {
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      ifcount 48
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      {
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        ifcansee
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          spawn SNOWFLAKE
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        resetcount
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      }
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    }
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    ifspritepal 2
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    {
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      ifcount 64
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      {
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        ifcansee
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          spawn SNOWFLAKE
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        resetcount
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      }
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    }
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    ifspritepal 3
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    {
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      ifcount 96
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      {
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        ifcansee
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          spawn SNOWFLAKE
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        resetcount
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      }
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    }
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    ifspritepal 4
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    {
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      ifcount 16
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      {
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        ifcansee
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          spawn SNOWFLAKE
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        resetcount
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      }
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    }
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enda
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action ASNOW
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move SNOWMOVE       -25 40   // You can tweak the motion here
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useractor notenemy SNOWFLAKE 0 ASNOW SNOWMOVE getv geth randomangle
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  sizeat 25 25
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  cstat 0
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  ifcount 4
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  {
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    move SNOWMOVE getv geth randomangle
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    resetcount
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    break
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  }
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  // Unlike the original code from Mystique, these flakes die when they
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  // hit the ground.. Works much better.
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  iffloordistl 5 killit
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  // Unlike the original snow from Joe Wilcox, these flakes have significant
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  // improvements in both code and looks.
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  // I (Hendricks266) have changed the incredibly ugly snow tile to a more
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  // detailed one with a smaller in-game size.
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  setactor[THISACTOR].mdflags 16
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  ifnotmoving killit
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enda
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// Hendricks266's much better Snow
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/*
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ActorExtra[i].floorz = s->z = getflorzofslope(s->sectnum,s->x,s->y);
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                s->xvel = (krand()&7)+(sintable[T1&2047]>>9);
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                T1 += (krand()&63);
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                if ((T1&2047) > 512 && (T1&2047) < 1596)
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                {
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                    if (sector[sect].lotag == 2)
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                    {
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                        if (s->zvel < 64)
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                            s->zvel += (g_spriteGravity>>5)+(krand()&7);
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                    }
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                    else if (s->zvel < 144)
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                        s->zvel += (g_spriteGravity>>5)+(krand()&7);
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                }
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                A_SetSprite(i,CLIPMASK0);
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                if ((krand()&3) == 0)
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                    setsprite(i,(vec3_t *)s);
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                if (s->sectnum == -1) KILLIT(i);
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                l = getflorzofslope(s->sectnum,s->x,s->y);
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247
                if (s->z > l)
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                {
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                    s->z = l;
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                    A_AddToDeleteQueue(i);
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                    PN ++;
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                    j = headspritestat[STAT_MISC];
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                    while (j >= 0)
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                    {
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                        if (sprite[j].picnum == BLOODPOOL)
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                            if (ldist(s,&sprite[j]) < 348)
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                            {
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                                s->pal = 2;
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                                break;
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                            }
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                        j = nextspritestat[j];
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                    }
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                }
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            if (sp->picnum == MONEY || sp->picnum == MAIL || sp->picnum == PAPER)
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            {
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                ActorExtra[i].temp_data[0] = krand()&2047;
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                sp->cstat = krand()&12;
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                sp->xrepeat = sp->yrepeat = 8;
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                sp->ang = krand()&2047;
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            }
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            changespritestat(i,5);
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*/
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useractor notenemy SNOW 0
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  sizeat 4 4
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  addvar nw_temp2 16
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  ifvarg nw_temp2 2047 subvar nw_temp2 4095
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  setvarvar nw_temp3 nw_temp2
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  sin nw_temp3 nw_temp3
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  shiftvarr nw_temp3 5
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/*
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  getactor[THISACTOR].x nw_x
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  getactor[THISACTOR].y nw_y
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  getactor[THISACTOR].z nw_z
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  updatesectorz nw_x nw_y nw_z nw_temp
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  getactor[THISACTOR].zvel nw_z
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  ifvare sector[nw_temp].lotag 2
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    {
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      ifvarl nw_z 64
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        {
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          setvar nw_tempb GRAVITATIONALCONSTANT
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          shiftvarr nw_tempb 5
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          addvarvar nw_tempb temp4
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          addvarvar nw_z nw_tempb
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        }
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    }
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  else
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    {
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      ifvarl nw_z 144
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        {
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          setvar nw_tempb GRAVITATIONALCONSTANT
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          shiftvarr nw_tempb 5
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          addvarvar nw_tempb temp4
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          addvarvar nw_z nw_tempb
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        }
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    }
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*/
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  movesprite THISACTOR nw_temp3 0 256 CLIPMASK0 RETURN
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  ifvarn RETURN 0 killit
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  getactor[THISACTOR].x nw_x
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  getactor[THISACTOR].y nw_y
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  getactor[THISACTOR].z nw_z
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  updatesectorz nw_x nw_y nw_z nw_temp
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  ifvarn nw_temp -1 getflorzofslope nw_temp nw_x nw_y nw_temp2 else killit
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  ifvarvare nw_z nw_temp2 killit
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enda