ai/boss/balfrog.cpp

#include "balfrog.h"

#include "../../ObjManager.h"
#include "../../autogen/sprites.h"
#include "../../common/misc.h"
#include "../../game.h"
#include "../../graphics/Renderer.h"
#include "../../graphics/Tileset.h"
#include "../../map.h"
#include "../../player.h"
#include "../../sound/SoundManager.h"
#include "../../trig.h"
#include "../../tsc.h"
#include "../ai.h"
#include "../stdai.h"
#include "../sym/smoke.h"

using namespace NXE::Graphics;

enum Frames
{
  FRAME_STAND           = 0,
  FRAME_CROUCH          = 1,
  FRAME_MOUTH_OPEN      = 2,
  FRAME_MOUTH_OPEN_HURT = 3,

  FRAME_JUMPING = 0 // on other sprite (SPR_BALFROG_JUMP)
};

enum States
{
  STATE_TRANSFORM = 20,  // script-triggered: must stay at this value
  STATE_READY     = 10,  // script-triggered: must stay at this value
  STATE_DEATH     = 130, // script-triggered: must stay at this value
  STATE_FIGHTING  = 100, // script-triggered: must stay at this value

  STATE_JUMPING = 50,

  STATE_OPEN_MOUTH  = 60,
  STATE_SHOOTING    = 70,
  STATE_CLOSE_MOUTH = 80,

  STATE_BIG_JUMP = 90
};

enum BBox_States
{
  BM_STAND,
  BM_JUMPING,
  BM_MOUTH_OPEN,
  BM_DISABLED
};

#define FROG_START_X ((5 * TILE_W) * CSFI)
#define FROG_START_Y ((10 * TILE_H) * CSFI)

#define LANDING_SMOKE_COUNT 8
#define LANDING_SMOKE_YTOP -4

#define DEATH_SMOKE_COUNT 8
#define DEATH_SMOKE_YTOP -24

// when he lands he spawns frogs from ceiling--
// this is the range of where they should spawn at
#define SPAWN_RANGE_LEFT 4
#define SPAWN_RANGE_RIGHT 16
#define SPAWN_RANGE_TOP 0
#define SPAWN_RANGE_BOTTOM 4

// offset from top and from left or right (depending on direction facing)
// to spawn the balrog 'puppet' when we return to balrog form after being defeated.
#define BALDEATH_X (12 * CSFI)
#define BALDEATH_Y (44 * CSFI)

// twiddle adjustment to get the proper Y coordinate when switching
// between normal and jumping sprites.
#define JUMP_SPRITE_ADJ (16 * CSFI)

INITFUNC(AIRoutines)
{
  ONDEATH(OBJ_BALFROG, ondeath_balfrog);
  ONTICK(OBJ_BALFROG_SHOT, ai_generic_angled_shot);
}

void BalfrogBoss::OnMapEntry(void)
{
  memset(&frog, 0, sizeof(frog));

  o                     = CreateObject(FROG_START_X, FROG_START_Y, OBJ_BALFROG);
  game.stageboss.object = o;

  o->hp     = 300;
  o->damage = 0; // damage comes from our bbox puppets, not our own bbox
  o->flags |= FLAG_SHOW_FLOATTEXT;

  o->sprite    = SPR_BALFROG;
  o->dir       = RIGHT;
  o->invisible = true;

  // setup the bounding box objects--this boss has an irregular bounding box
  // and so we simulate that by having three invisible objects which are wired
  // to transmit hits to the real Balfrog boss object.
  frog.bboxes.init(o, 3);
  frog.bboxes.set_damage(5);
  frog.bbox_mode = BM_DISABLED;

  // now disable being able to hit the Balfrog boss object itself.
  o->flags &= ~FLAG_SHOOTABLE;

  objprop[OBJ_BALFROG].xponkill  = 1;
  objprop[OBJ_BALFROG].shaketime = 9;
}

/*
void c------------------------------() {}
*/

static void call_place_bboxes(void *balfrog)
{
  ((BalfrogBoss *)balfrog)->place_bboxes();
}

void BalfrogBoss::Run()
{
  if (!o)
    return;

  // each subroutine handles a subset of the frog's finite state machine
  RunFighting();
  RunJumping();
  RunShooting();

  RunEntryAnim();
  RunDeathAnim();

  if (o) // because RunDeathAnim destroys o at end of fight
  {
    o->yinertia += 0x40;
    // don't limit upwards inertia or Big Jump will fail
    if (o->yinertia > 0x5FF)
      o->yinertia = 0x5FF;

    // link our "irregular" bbox (actually composed of multiple "puppet" bboxes)
    // to our real object.
    frog.bboxes.transmit_hits();
    frog.bboxes.place(&call_place_bboxes, this);
  }
}

/*
void c------------------------------() {}
*/

void BalfrogBoss::place_bboxes()
{
#define set_bbox frog.bboxes.set_bbox

  // I got these coordinates by drawing rectangles over the
  // sprites in Photoshop. These are for the right-facing frame
  // and are automatically flipped if the object is facing left.
  switch (frog.bbox_mode)
  {
    case BM_STAND:
      set_bbox(0, 5, 28, 50, 36, FLAG_INVULNERABLE); // body
      set_bbox(1, 37, 4, 38, 36, FLAG_INVULNERABLE); // head
      break;

    case BM_JUMPING:
      set_bbox(0, 12, 29, 41, 47, FLAG_INVULNERABLE); // body
      set_bbox(1, 30, 3, 43, 35, FLAG_INVULNERABLE);  // head
      break;

    case BM_MOUTH_OPEN:
      set_bbox(0, 8, 22, 38, 42, FLAG_INVULNERABLE);  // backside
      set_bbox(1, 46, 54, 13, 10, FLAG_INVULNERABLE); // feet below mouth
      set_bbox(2, 46, 15, 21, 39, FLAG_SHOOTABLE);    // mouth target
      break;
  }
}

/*
void c------------------------------() {}
*/

// the "master" start state, we can always return here eventually from
// all the other states. The script also sets this state to start the fight.
void BalfrogBoss::RunFighting()
{
  switch (o->state)
  {
    case STATE_FIGHTING:
    {
      o->frame       = FRAME_STAND;
      frog.bbox_mode = BM_STAND;

      o->state++;
      o->timer    = 0;
      o->xinertia = 0;
    }
    case STATE_FIGHTING + 1:
    {
      o->timer++;

      // prepare to jump
      if (o->timer < 50)
        o->frame = FRAME_STAND;
      if (o->timer == 50)
        o->frame = FRAME_CROUCH;
      if (o->timer == 60)
        o->frame = FRAME_STAND;

      // jump
      if (o->timer > 64)
        o->state = STATE_JUMPING;
    }
    break;
  }
}

// handles the hopping and the "big jump" attack
// (a straight up/down jump after every 3rd attack that spawns tons of frogs).
void BalfrogBoss::RunJumping()
{
  switch (o->state)
  {
    case STATE_JUMPING:
    {
      NXE::Sound::SoundManager::getInstance()->playSfx(NXE::Sound::SFX::SND_FUNNY_EXPLODE);

      SetJumpingSprite(true);
      o->yinertia = -0x400;

      XMOVE(0x200);
      o->timer = 0;
      o->state++;
    }
    case STATE_JUMPING + 1:
    {
      // turn around at walls
      if (o->dir == LEFT && o->blockl)
        o->dir = RIGHT;
      if (o->dir == RIGHT && o->blockr)
        o->dir = LEFT;

      // landed?
      if (++o->timer > 3 && o->blockd)
      {
        quake(30);
        SetJumpingSprite(false);

        // passed player? turn around and fire!
        if ((o->dir == RIGHT && o->x >= player->x) || (o->dir == LEFT && o->x <= player->x))
        {
          o->dir ^= 1;
          o->state = STATE_OPEN_MOUTH;
        }
        else
        {
          o->state = STATE_FIGHTING;
        }

        // shake a small frog loose from the ceiling on every landing
        SpawnFrogs(OBJ_MINIFROG, 1);
        SmokeSide(o, 8, DOWN);
//        SpawnSmoke(LANDING_SMOKE_COUNT, LANDING_SMOKE_YTOP);
      }
    }
    break;

    case STATE_BIG_JUMP:
    {
      o->state++;
      o->timer    = 0;
      o->xinertia = 0;
    }
    case STATE_BIG_JUMP + 1: // animation of preparing to jump
    {
      o->timer++;

      if (o->timer < 50)
        o->frame = FRAME_STAND;
      if (o->timer == 50)
        o->frame = FRAME_CROUCH;
      if (o->timer == 70)
        o->frame = FRAME_STAND;

      if (o->timer > 74)
      {
        o->state++;

        SetJumpingSprite(true);
        o->yinertia = -0xA00;
      }
    }
    break;

    case STATE_BIG_JUMP + 2: // in air, waiting to hit ground
    {
      // pass through ceiling at edges
      if (o->y <= MAPY(8))
        o->flags |= FLAG_IGNORE_SOLID;
      else
        o->flags &= ~FLAG_IGNORE_SOLID;

      if (++o->timer > 3 && o->blockd)
      {
        o->flags &= ~FLAG_IGNORE_SOLID;
        SetJumpingSprite(false);
        quake(60);

        SpawnFrogs(OBJ_MINIFROG, 6);
        SpawnFrogs(OBJ_FROG, 2);
        SmokeSide(o, 8, DOWN);
//        SpawnSmoke(LANDING_SMOKE_COUNT, LANDING_SMOKE_YTOP);

        // player ran under us? turn around and fire!
        if ((o->dir == RIGHT && o->x >= player->x) || (o->dir == LEFT && o->x <= player->x))
        {
          o->state = STATE_OPEN_MOUTH;
        }
        else
        {
          o->state = STATE_FIGHTING;
        }

        FACEPLAYER;
      }
    }
    break;
  }
}

void BalfrogBoss::RunShooting()
{
  switch (o->state)
  {
    case STATE_OPEN_MOUTH: // open mouth and fire shots
    {
      o->frame = FRAME_STAND;
      o->timer = 0;
      o->state++;
    }
    case STATE_OPEN_MOUTH + 1:
    {
      o->xinertia *= 8;
      o->xinertia /= 9;

      o->timer++;

      if (o->timer == 50)
        o->frame = FRAME_CROUCH;

      if (o->timer > 54)
      {
        o->state = STATE_SHOOTING;
        o->timer = 0;

        o->frame       = FRAME_MOUTH_OPEN;
        frog.bbox_mode = BM_MOUTH_OPEN;

        frog.orighp      = o->hp;
        frog.shots_fired = 0;
      }
    }
    break;

    case STATE_SHOOTING:
    {
      frog.bbox_mode = BM_MOUTH_OPEN;
      o->frame       = FRAME_MOUTH_OPEN;
      o->xinertia *= 10;
      o->xinertia /= 11;

      if (o->shaketime)
      {
        if (++frog.shakeflash & 2)
          o->frame = FRAME_MOUTH_OPEN_HURT;
      }
      else
      {
        frog.shakeflash = 0;
      }

      if (++o->timer > 16)
      {
        o->timer = 0;

        EmFireAngledShot(o, OBJ_BALFROG_SHOT, 16, 0x200);
        NXE::Sound::SoundManager::getInstance()->playSfx(NXE::Sound::SFX::SND_EM_FIRE);

        if (++frog.shots_fired > 10 || o->hp < (frog.orighp - 90))
        {
          o->frame       = FRAME_CROUCH;
          o->state       = STATE_CLOSE_MOUTH;
          frog.bbox_mode = BM_STAND;
          o->timer       = 0;
        }
      }
    }
    break;

    case STATE_CLOSE_MOUTH:
    {
      o->frame = FRAME_CROUCH;

      if (++o->timer > 10)
      {
        o->timer = 0;
        o->frame = FRAME_STAND;

        if (++frog.attackcounter >= 3)
        { // big jump after every 3rd attack
          frog.attackcounter = 0;
          o->state           = STATE_BIG_JUMP;
        }
        else
        {
          o->state = STATE_FIGHTING;
        }
      }
    }
    break;
  }
}

/*
void c------------------------------() {}
*/

// the animation where we first appear
// both these states are triggered by the script
void BalfrogBoss::RunEntryAnim()
{
  switch (o->state)
  {
    // transforming from Balrog
    // the flicker is calibrated to be interlaced exactly out-of-phase
    // with Balrog's flicker, which is entirely separate.
    case STATE_TRANSFORM:
    {
      o->timer = 0;
      o->frame = FRAME_MOUTH_OPEN;
      o->state++;
    }
    case STATE_TRANSFORM + 1:
    {
      o->timer++;
      o->invisible = (o->timer & 2) ? true : false;
    }
    break;

    // transformation complete: puff away balrog, and appear solid now
    case STATE_READY:
    {
      SmokeBoomUp(o);

      o->state++;
      o->frame = FRAME_MOUTH_OPEN;
    }
    break;
  }
}

void BalfrogBoss::RunDeathAnim()
{
  switch (o->state)
  {
    case STATE_DEATH: // BOOM!
    {
      SetJumpingSprite(false);
      o->frame = FRAME_MOUTH_OPEN;

      NXE::Sound::SoundManager::getInstance()->playSfx(NXE::Sound::SFX::SND_BIG_CRASH);
      o->xinertia = 0;
      o->timer    = 0;
      o->state++;

      SmokeBoomUp(o, 8);
    }
    case STATE_DEATH + 1: // shaking with mouth open
    {
      o->timer++;
      if ((o->timer % 5) == 0)
      {
        SmokeBoomUp(o, 1);
      }

      // at a glance it might seem like this has it alternate
      // slowly between 2 X coordinates, but in fact, it
      // alternates quickly between 3.
      o->x += (o->timer & 2) ? (1 * CSFI) : (-1 * CSFI);

      if (o->timer > 100)
      {
        o->timer = 0;
        o->state++;
      }
    }
    break;

    case STATE_DEATH + 2: // begin flashing back and forth between frog and balrog
    {
      // spawn balrog puppet
      frog.balrog        = CreateObject(0, o->y + BALDEATH_Y, OBJ_BALROG);
      frog.balrog->state = 500; // tell him to give us complete control
      frog.balrog->dir   = o->dir;
      frog.balrog->frame = 5;

      if (o->dir == RIGHT)
      {
        frog.balrog->x = (o->x + BALDEATH_X);
      }
      else
      {
        frog.balrog->x = o->x + o->Width(); // not the same as o->Right()
        frog.balrog->x -= frog.balrog->Width();
        frog.balrog->x -= BALDEATH_X;
      }

      o->state++;
    }
    case STATE_DEATH + 3: // flashing
    {
      o->timer++;

      if ((o->timer % 9) == 0)
        SmokeBoomUp(o, 1);

      if (o->timer <= 150)
      {
        o->invisible           = (o->timer & 2);
        frog.balrog->invisible = !(o->timer & 2);
      }

      if (o->timer > 156)
      {
        o->timer = 0;
        o->state++;
      }
    }
    break;

    case STATE_DEATH + 4: // balrog falling to ground
    {
      // should start to move exactly when timer hits 160
      //
      // 10 frames until starts to fall
      // 14 frames until changes to landed frame
      frog.balrog->yinertia += 0x40;

      if (frog.balrog->blockd)
      {
        frog.balrog->frame = 2;
        if (++o->timer > 30)
        {
          frog.balrog->frame = 3;
          o->state++;
        }
      }
    }
    break;

    case STATE_DEATH + 5: // balrog flying away
    {
      if (++o->timer > 30)
      {
        // it's all over, destroy ourselves and clean up
        frog.balrog->yinertia = -0xA00;
        frog.balrog->flags |= FLAG_IGNORE_SOLID;

        if (frog.balrog->y < -(100 * CSFI))
        {
          frog.balrog->Delete();
          frog.bboxes.destroy();

          o->Delete();
          o = game.stageboss.object = NULL;
          return;
        }
      }
    }
    break;
  }
}

/*
void c------------------------------() {}
*/

void ondeath_balfrog(Object *o)
{
  o->flags &= ~FLAG_SHOOTABLE;
  game.tsc->StartScript(1000);
}

/*
void c------------------------------() {}
*/

// shake loose frogs from the ceiling
void BalfrogBoss::SpawnFrogs(int objtype, int count)
{
  Object *child;

  for (int i = 0; i < count; i++)
  {
    int x = random(SPAWN_RANGE_LEFT, SPAWN_RANGE_RIGHT);
    int y = random(SPAWN_RANGE_TOP, SPAWN_RANGE_BOTTOM);

    child      = CreateObject((x * TILE_W) * CSFI, (y * TILE_H) * CSFI, objtype);
    child->dir = DOWN; // allow fall through ceiling
  }
}

// switches on and off the jumping frame/sprite
void BalfrogBoss::SetJumpingSprite(bool enable)
{
  if (enable != (o->sprite == SPR_BALFROG_JUMP))
  {
    if (enable)
    {
      o->sprite = SPR_BALFROG_JUMP;
      o->frame  = FRAME_JUMPING;
      o->y -= JUMP_SPRITE_ADJ;

      frog.bbox_mode = BM_JUMPING;
    }
    else
    {
      o->sprite = SPR_BALFROG;
      o->frame  = FRAME_STAND;
      o->y += JUMP_SPRITE_ADJ;

      frog.bbox_mode = BM_STAND;
    }
  }
}