//Uses fixed-point.

RegDft("TempleOS/RawHide","F64 best_score=9999;\n");
RegExe("TempleOS/RawHide");

F64 t0,tf;
I64 outside_cnt;

#define MAP_WIDTH       1000
#define MAP_HEIGHT      1000
#define FENCE_WIDTH     320
#define FENCE_HEIGHT    200
#define MAP_BORDER      3
CDC *map_dc;

#define GATE_WIDTH      22
#define GATE_HEIGHT     7
F64 gate_theta,gate_t;



<1>/* Graphics Not Rendered in HTML */  <2>/* Graphics Not Rendered in HTML */  <3>/* Graphics Not Rendered in HTML */


<4>/* Graphics Not Rendered in HTML */  <5>/* Graphics Not Rendered in HTML */  <6>/* Graphics Not Rendered in HTML */


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        <10>/* Graphics Not Rendered in HTML */








#define ANIMAL_WIDTH    20
#define ANIMAL_HEIGHT   16

U8 *cow_imgs[4]  ={<1>,<2>,<3>,<2>},
   *bull_imgs[4] ={<4>,<5>,<6>,<5>},
   *horse_imgs[4]={<7>,<8>,<7>,<8>};

#define ANIMALS_NUM     100

class Animal
{
  I64   num,x,y,dx,dy;
  U8    **imgs;
  U32   buddy;
  U8    type,frame0;
  Bool  dead,pad;
} *a;

//************************************
#define WATERFALL_HEIGHT        (MAP_HEIGHT/20)
#define WATERFALL_DROPS         512
#define WATERFALL_ACCELERATION  10
I32 *r_x,*r_width,*wfd_x;
F64 *wfd_t0,waterfall_tf;
I64 waterfall_x,waterfall_y,waterfall_width;

U0 RiverNew()
{
  r_x=MAlloc(MAP_HEIGHT*sizeof(I32));
  r_width=MAlloc(MAP_HEIGHT*sizeof(I32));
  wfd_x=MAlloc(WATERFALL_DROPS*sizeof(I32));
  wfd_t0=MAlloc(WATERFALL_DROPS*sizeof(F64));
  waterfall_tf=Sqrt(2*WATERFALL_HEIGHT/WATERFALL_ACCELERATION);
}

U0 RiverMake()
{
  I64 i,x=2*MAP_WIDTH<<32/3,y,dx=0,w=15<<32;
  waterfall_y=(MAP_HEIGHT-WATERFALL_HEIGHT)/2*Rand+
        (MAP_HEIGHT-WATERFALL_HEIGHT)/4;
  for (y=MAP_BORDER;y<MAP_HEIGHT-MAP_BORDER;y++) {
    r_x[y]=x.i32[1]; r_width[y]=w.i32[1];
    if (waterfall_y-5<y<waterfall_y+WATERFALL_HEIGHT+5) {
      waterfall_width=r_width[y];
      waterfall_x=r_x[y]-waterfall_width/2;
    } else {
      dx=ClampI64(dx+RandI32/64,-I32_MAX,I32_MAX)-I32_MAX/256;
      w=ClampI64(w+RandI32*2,10*U32_MAX,150*U32_MAX);
      x+=dx;
    }
  }
  for (i=0;i<WATERFALL_DROPS;i++) {
    wfd_x[i]=Rand*waterfall_width+waterfall_x;
    wfd_t0[i]=tS-Rand*waterfall_tf;
  }

  //Plot waterfall cliff
  Sprite3B(map_dc,waterfall_x,waterfall_y,0,<10>);

  //Plot sand bar
  x=0;
  for (y=MAP_BORDER;y<MAP_HEIGHT-MAP_BORDER;y++) {
    if (!(waterfall_y-9<y<waterfall_y+WATERFALL_HEIGHT+9)) {
      map_dc->color=YELLOW;
      map_dc->thick=r_width[y]+10;
      GrPlot3(map_dc,r_x[y]+x.i32[1],y,0);
    }
    x=ClampI64(x+RandI32,-6*U32_MAX,6*U32_MAX);
  }

  //Plot water
  for (y=MAP_BORDER;y<MAP_HEIGHT-MAP_BORDER;y++) {
    map_dc->color=BLUE;
    map_dc->thick=r_width[y];
    GrPlot3(map_dc,r_x[y],y,0);
  }
}

U0 RiverDel()
{
  Free(r_x);
  Free(r_width);
  Free(wfd_x);
  Free(wfd_t0);
}

//************************************
class RiverDrop
{
  RiverDrop *next,*last;
  I64 y,dx,dy;
} rd_head;
Bool rd_lock;

U0 RiverDropsDel()
{
  while (LBts(&rd_lock,0))
    Yield;
  QueDel(&rd_head,TRUE);
  QueInit(&rd_head);
  LBtr(&rd_lock,0);
}

U0 RiverDropsNext(CTask *mem_task)
{
  RiverDrop *tmpr,*tmpr1;
  while (LBts(&rd_lock,0))
    Yield;
  tmpr=rd_head.next;
  while (tmpr!=&rd_head) {
    tmpr1=tmpr->next;
    if (++tmpr->y>=MAP_HEIGHT-MAP_BORDER) {
      QueRem(tmpr);
      Free(tmpr);
    } else {
      do {
        if (RandU16&1 && GrPeek(map_dc,r_x[tmpr->y]+tmpr->dx,
              tmpr->y+tmpr->dy)==BLUE)
          break;
        tmpr->dx=ClampI64(tmpr->dx+RandU16%3-1,-r_width[tmpr->y]/2,
              r_width[tmpr->y]/2);
        tmpr->dy=ClampI64(tmpr->dy+RandU16%3-1,-r_width[tmpr->y]/2,
              r_width[tmpr->y]/2);
      } while (GrPeek(map_dc,r_x[tmpr->y]+tmpr->dx,
            tmpr->y+tmpr->dy)!=BLUE &&
            GrPeek(map_dc,r_x[tmpr->y],tmpr->y)==BLUE);//Might be reiniting
    }
    tmpr=tmpr1;
  }
  tmpr=MAlloc(sizeof(RiverDrop),mem_task);
  tmpr->y=MAP_BORDER;
  tmpr->dx=0;
  tmpr->dy=0;
  QueIns(tmpr,rd_head.last);
  LBtr(&rd_lock,0);
}

U0 RiverDropsDraw(CDC *dc,I64 cx,I64 cy)
{
  I64 i;
  F64 t=tS;
  RiverDrop *tmpr;
  while (LBts(&rd_lock,0))
    Yield;
  tmpr=rd_head.next;
  dc->color=LTBLUE;
  while (tmpr!=&rd_head) {
    GrPlot(dc,r_x[tmpr->y]+tmpr->dx-cx,tmpr->y+tmpr->dy-cy);
    tmpr=tmpr->next;
  }
  LBtr(&rd_lock,0);

  dc->color=WHITE;
  for (i=0;i<WATERFALL_DROPS;i++)
    GrPlot(dc,wfd_x[i]-cx,waterfall_y+0.5*WATERFALL_ACCELERATION*
          Sqr(waterfall_tf*Saw(t-wfd_t0[i],waterfall_tf))-cy);
}

//************************************
U0 DrawIt(CTask *task,CDC *dc)
{
  static I64 last_pos_x=0;
  static Bool left=TRUE;
  F64 t;
  I64 i,frame=4*tS,
        cx=(MAP_WIDTH -task->pix_width)/2,
        cy=(MAP_HEIGHT-task->pix_height)/2;
  if (task->scroll_x+cx<0)
    task->scroll_x=-cx;
  if (task->scroll_x+cx>MAP_WIDTH-task->pix_width)
    task->scroll_x=MAP_WIDTH-task->pix_width-cx;
  if (task->scroll_y+cy<0)
    task->scroll_y=-cy;
  if (task->scroll_y+cy>MAP_HEIGHT-task->pix_height)
    task->scroll_y=MAP_HEIGHT-task->pix_height-cy;

  map_dc->flags|=DCF_NO_TRANSPARENTS;
  GrBlot(dc,-cx,-cy,map_dc);

  RiverDropsDraw(dc,cx,cy);

  for (i=0;i<ANIMALS_NUM;i++)
    if (!a[i].dead) {
      if (a[i].dx<0) {
        dc->flags|=DCF_JUST_MIRROR|DCF_SYMMETRY;
        DCSymmetrySet(dc,a[i].x.i32[1]-cx,0,a[i].x.i32[1]-cx,1);
      }
      Sprite3(dc,a[i].x.i32[1]-cx,a[i].y.i32[1]-cy,0,
            a[i].imgs[(frame+a[i].frame0)&3]);
      dc->flags&=~(DCF_JUST_MIRROR|DCF_SYMMETRY);
    }

  if (ms.pos.x-last_pos_x>0)
    left=FALSE;
  else if (ms.pos.x-last_pos_x<0)
    left=TRUE;
  if (left) {
    dc->flags|=DCF_JUST_MIRROR|DCF_SYMMETRY;
    DCSymmetrySet(dc,ms.pos.x-task->pix_left-task->scroll_x,0,
          ms.pos.x-task->pix_left-task->scroll_x,1);
  }
  Sprite3(dc,ms.pos.x-task->pix_left-task->scroll_x,
        ms.pos.y-task->pix_top -task->scroll_y,0,horse_imgs[frame&3]);
  dc->flags&=~(DCF_JUST_MIRROR|DCF_SYMMETRY);
  last_pos_x=ms.pos.x;

  if (tf) {
    dc->color=RED;
    t=tf-t0;
    if (Blink)
      GrPrint(dc,(task->pix_width-FONT_WIDTH*14)>>1-task->scroll_x,
            (task->pix_height-FONT_HEIGHT)>>1-task->scroll_y,
            "Game Completed");
  } else {
    dc->color=BLACK;
    t=tS-t0;
  }
  GrPrint(dc,-task->scroll_x,-task->scroll_y,
        "Outside:%03d Time:%7.2fs Best:%7.2fs",
        outside_cnt,t,best_score);
}

U0 BuddySel(I64 i)
{
  I64 b,best_b=i,score,best_score=I64_MAX;
  for (b=0;b<ANIMALS_NUM;b++) {
    if (b!=i && !a[b].dead) {
      score=RandU32%(512*512)+
            SqrI64(a[b].x.i32[1]-a[i].x.i32[1])+
            SqrI64(a[b].y.i32[1]-a[i].y.i32[1]);
      if (score<best_score) {
        best_score=score;
        best_b=b;
      }
    }
  }
  a[i].buddy=best_b;
}


U0 RedrawGate()
{
  F64 tt=tS-gate_t;
  I64 x1=FENCE_WIDTH-63,y1=FENCE_HEIGHT-1,dx,dy;

  if (tt<0.5)
    gate_theta=Clamp(gate_theta+0.02,0,pi/2);
  else if (tt>5.0)
    gate_theta=Clamp(gate_theta-0.02,0,pi/2);

  dx=GATE_WIDTH*Cos(gate_theta); dy=-0.8*GATE_WIDTH*Sin(gate_theta);

  map_dc->color=LTGREEN;
  GrRect(map_dc,x1,y1-0.8*GATE_WIDTH-GATE_HEIGHT,
        46,0.8*GATE_WIDTH+GATE_HEIGHT+3);

  map_dc->color=BLACK;

  GrLine(map_dc,x1,y1,x1+dx,y1+dy);
  GrLine(map_dc,x1,y1,x1,y1-GATE_HEIGHT);
  GrLine(map_dc,x1+dx,y1+dy,x1+dx,y1+dy-GATE_HEIGHT);
  GrLine(map_dc,x1,y1-GATE_HEIGHT,x1+dx,y1+dy-GATE_HEIGHT);
  GrLine(map_dc,x1,y1,x1+dx,y1+dy-GATE_HEIGHT);
  GrLine(map_dc,x1,y1-GATE_HEIGHT,x1+dx,y1+dy);

  GrLine(map_dc,x1+45,y1,x1+45-dx,y1+dy);
  GrLine(map_dc,x1+45,y1,x1+45,y1-GATE_HEIGHT);
  GrLine(map_dc,x1+45-dx,y1+dy,x1+45-dx,y1+dy-GATE_HEIGHT);
  GrLine(map_dc,x1+45,y1-GATE_HEIGHT,x1+45-dx,y1+dy-GATE_HEIGHT);
  GrLine(map_dc,x1+45,y1,x1+45-dx,y1+dy-GATE_HEIGHT);
  GrLine(map_dc,x1+45,y1-GATE_HEIGHT,x1+45-dx,y1+dy);
}

Bool CheckMap(I64 x,I64 y)
{
  I64 i,j,c;
  if (SqrI64(x-(waterfall_x+waterfall_width/2))>>1+
        SqrI64(y-(waterfall_y+WATERFALL_HEIGHT/2))<2500)
    return FALSE;
  for (j=-4;j<=2;j++)
    for (i=-4;i<=4;i++) {
      c=GrPeek(map_dc,x+i,y+j);
      if (c==LTGRAY || c==BLACK)
        return FALSE;
    }
  return TRUE;
}

U0 AnimateTask(CTask *parent)
{
  I64 i,cx,cy,cursor_x,cursor_y,dd,ddx,ddy,cnt,max_speed=I64_MAX,updates=0,
        my_outside_cnt;
  F64 f,d,dx,dy,s,stress;
  Animal *tmpa,*tmpa1;
  while (TRUE) {
    max_speed=ClampU64(max_speed,U32_MAX/3,200*U32_MAX);
    cx=(MAP_WIDTH -parent->pix_width)/2,
          cy=(MAP_HEIGHT-parent->pix_height)/2;
    cursor_x=ms.pos.x+cx-parent->pix_left-parent->scroll_x;
    cursor_y=ms.pos.y+cy-parent->pix_top -parent->scroll_y;
    cnt=0;stress=0;
    my_outside_cnt=0;
    if (cursor_x<FENCE_WIDTH && cursor_y<FENCE_HEIGHT)
      gate_t=tS;
    RedrawGate;
    for (i=0;i<ANIMALS_NUM;i++) {
      tmpa=&a[i];
      if (!tmpa->dead) {
//Move away from horse
        ddx=tmpa->x.i32[1]-cursor_x;
        ddy=tmpa->y.i32[1]-cursor_y;
        if (dd=SqrI64(ddx)+SqrI64(ddy)) {
          d=Sqrt(dd);
          dx=ddx/d;
          dy=ddy/d;
          f=5.0e2*U32_MAX/dd;
          tmpa->dx+=f*dx;
          tmpa->dy+=f*dy;
        }

        //Resel buddy about every ANIMALS_NUM*10ms=5.12 seconds
        tmpa1=&a[tmpa->buddy];
        if (tmpa1->dead || i==updates%ANIMALS_NUM) {
          BuddySel(i);
          tmpa1=&a[tmpa->buddy];
        }

        //Move toward buddy
        ddx=tmpa->x.i32[1]-tmpa1->x.i32[1];
        ddy=tmpa->y.i32[1]-tmpa1->y.i32[1];
        if (dd=SqrI64(ddx)+SqrI64(ddy)) {
          d=Sqrt(dd);
          s=d`1.25-80;
          stress+=Abs(s);
          dx=ddx/d;
          dy=ddy/d;
          f=-0.001*s*U32_MAX;
          tmpa->dx+=f*dx;
          tmpa->dy+=f*dy;
        }

        //Make velocity similar to buddy
        tmpa->dx+=0.1*(tmpa1->dx-tmpa->dx);
        tmpa->dy+=0.1*(tmpa1->dy-tmpa->dy);

        //Add random movement, limit speed and dampen speed
        tmpa->dx=0.995*ClampI64(tmpa->dx+RandI32/32,-max_speed,max_speed);
        tmpa->dy=0.995*ClampI64(tmpa->dy+RandI32/32,-max_speed,max_speed);

        //Slow in river
        if (GrPeek(map_dc,tmpa->x.i32[1],tmpa->y.i32[1])!=LTGREEN) {
          tmpa->dx/=2;
          tmpa->dy/=2;
        }

        if (CheckMap((tmpa->x+tmpa->dx)>>32,(tmpa->y+tmpa->dy)>>32)) {
          tmpa->x+=tmpa->dx;
          tmpa->y+=tmpa->dy;
        }

        //Keep on map
        if (!(MAP_BORDER+ANIMAL_WIDTH/2
              <=tmpa->x.i32[1]<MAP_WIDTH-MAP_BORDER-ANIMAL_WIDTH/2)) {
          tmpa->x -=tmpa->dx;
          tmpa->dx=-tmpa->dx;
        }
        if (!(MAP_BORDER+ANIMAL_HEIGHT
              <=tmpa->y.i32[1]<MAP_HEIGHT-MAP_BORDER)) {
          tmpa->y -=tmpa->dy;
          tmpa->dy=-tmpa->dy;
        }
        cnt++;
        if (tmpa->x>>32>=FENCE_WIDTH || tmpa->y>>32>=FENCE_HEIGHT)
          my_outside_cnt++;
      }
    }
    outside_cnt=my_outside_cnt;

    if (!(updates&15))
      RiverDropsNext(parent);

    if (!tf && !outside_cnt) {
      tf=tS;
      music.mute=TRUE;
      Snd(86);Sleep(200);Snd;Sleep(100);
      if (tf-t0<best_score) {
        best_score=tf-t0;
        Snd(86);Sleep(200);Snd;Sleep(100);
      }
      music.mute=FALSE;
    }

    updates++;

    if (cnt)
      stress/=cnt;
    else
      stress=0;
    if (stress>100.0) {
      Yield;
      max_speed=stress/5.0*U32_MAX; //Converge faster at start-up
    } else {
      Sleep(10);
      max_speed=0; //Will be set to normal max speed
    }
  }
}

U0 SongTask(I64)
{//Randomly generated (by God :-)
  Fs->task_end_cb=&SndTaskEndCB;
  MusicSettingsRst;
  while (TRUE) {
    Play("5qC4etG5DC4B5DCECFqFC4sA5D4A5D4qB");
    Play("5C4etG5DC4B5DCECFqFC4sA5D4A5D4qB");
    Play("4sGAGA5qG4etG5GD4eBBqB5F4eBA5qE");
    Play("4sGAGA5qG4etG5GD4eBBqB5F4eBA5qE");
  }
}

U0 ReInit()
{
  I64 i;

  RiverDropsDel;
  map_dc->color=LTGREEN;
  GrRect(map_dc,2,2,MAP_WIDTH-4,MAP_HEIGHT-4);

  RiverMake;

  //Plot fence
  for (i=FENCE_WIDTH;i>0;i-=16)
    Sprite3(map_dc,i,FENCE_HEIGHT,0,<9>);
  map_dc->thick=1;
  map_dc->color=BROWN;
  for (i=0;i<FENCE_HEIGHT-16;i+=16)
    GrLine(map_dc,FENCE_WIDTH-1,i,FENCE_WIDTH-1,i+7);
  map_dc->color=LTGRAY;
  GrLine(map_dc,FENCE_WIDTH,0,FENCE_WIDTH,FENCE_HEIGHT-6);
  RedrawGate;

  map_dc->thick=MAP_BORDER;
  map_dc->color=RED;
  GrBorder(map_dc,MAP_BORDER/2,MAP_BORDER/2,
        MAP_WIDTH-(MAP_BORDER+1)/2,MAP_HEIGHT-(MAP_BORDER+1)/2);

  for (i=MAP_BORDER;i<=MAP_HEIGHT-MAP_BORDER;i++)
    RiverDropsNext(Fs);

  MemSet(a,0,ANIMALS_NUM*sizeof(Animal));
  for (i=0;i<ANIMALS_NUM;i++) {
    a[i].num=i;
    do {
      a[i].x=(64+RandU32%(MAP_WIDTH-128))<<32;
      a[i].y=(64+RandU32%(MAP_WIDTH-128))<<32;
    } while (!CheckMap(a[i].x>>32,a[i].y>>32));
    if (i&1)
      a[i].imgs=cow_imgs;
    else
      a[i].imgs=bull_imgs;
    a[i].frame0=RandU16&3;
    BuddySel(i);
  }
  outside_cnt=ANIMALS_NUM;
  gate_t=0;
  gate_theta=0;
  t0=tS;
  tf=0;
}

U0 Init()
{
  RiverNew;
  rd_lock=0;
  QueInit(&rd_head);
  map_dc=DCNew(MAP_WIDTH,MAP_HEIGHT);
  a=MAlloc(ANIMALS_NUM*sizeof(Animal));
  ReInit;
}

U0 CleanUp()
{
  DCDel(map_dc);
  Free(a);
  RiverDropsDel;
  RiverDel;
}

U0 RawHide()
{
  I64 msg_code,arg1,arg2;
  SettingsPush; //See SettingsPush
  MenuPush(
        "File {"
        "  Abort(,CH_SHIFT_ESC);"
        "  Exit(,CH_ESC);"
        "}"
        "Play {"
        "  Restart(,'\n');"
        "}"
        );
  Fs->song_task=Spawn(&SongTask,NULL,"Song",,Fs);

  PopUpOk(
        "Coral the cattle.  The coral is in the\n"
        "upper-left corner if you scroll.\n\n"
        "Keep holding the $GREEN$<CTRL>$FG$ key and\n"
        "scroll with $GREEN${CTRL-Left Grab}$FG$.");

  Fs->win_inhibit=WIG_TASK_DFT-WIF_SELF_FOCUS
        -WIF_SELF_BORDER-WIF_SELF_GRAB_SCROLL-WIF_FOCUS_TASK_MENU;
  AutoComplete;
  WinBorder;
  WinMax;
  DocCursor;
  DocClear;
  Init;
  Fs->animate_task=Spawn(&AnimateTask,Fs,"Animate",,Fs);
  Fs->draw_it=&DrawIt;
  try {
    while (TRUE) {
      msg_code=GetMsg(&arg1,&arg2,
            1<<MSG_KEY_DOWN+1<<MSG_MS_L_DOWN+1<<MSG_MS_R_DOWN);
      switch (msg_code) {
        case MSG_MS_L_DOWN:  //Doesn't do anything, yet.
          break;
        case MSG_MS_R_DOWN:  //Doesn't do anything, yet.
          break;
        case MSG_KEY_DOWN:
          switch (arg1) {
            case '\n':
              ReInit;
              break;
            case CH_SHIFT_ESC:
            case CH_ESC:
              goto rh_done;
          }
          break;
      }
    }
rh_done:
    GetMsg(,,1<<MSG_KEY_UP);
  } catch
    PutExcept;
  SettingsPop;
  CleanUp;
  MenuPop;
  RegWrite("TempleOS/RawHide","F64 best_score=%5.4f;\n",best_score);
}

RawHide;