commandergenius/src/ai/ray.cpp

#include "../sdl/sound/CSound.h"
#include "../keen.h"
#include "../include/game.h"

#include "../include/enemyai.h"

// raygun blast, shot by keen, and by the tank robots in ep1&2.
#include "ray.h"

void ray_ai(int o, stCloneKeenPlus *pCKP, stLevelControl levelcontrol)
{
int i;
int hitlethal;
  if (objects[o].needinit)
  {
    objects[o].ai.ray.state = RAY_STATE_FLY;
    objects[o].inhibitfall = 1;
    objects[o].needinit = 0;

    // if we shoot directly up against a wall have
    // the ZAP appear next to the wall, not in it
    if (objects[o].ai.ray.direction==RIGHT && objects[o].blockedr)
    {
       objects[o].x = (objects[o].x >> 4 >> CSF) << 4 << CSF;
       if (TileProperty[getmaptileat(objects[o].x>>CSF,objects[o].y>>CSF)][BLEFT]) objects[o].x -= (16<<CSF);
       //if (tiles[getmaptileat(objects[o].x>>CSF,objects[o].y>>CSF)].solidl) objects[o].x -= (16<<CSF);
       objects[o].ai.ray.state = RAY_STATE_SETZAPZOT;
       if (objects[o].onscreen) g_pSound->playStereofromCoord(SOUND_SHOT_HIT, PLAY_NOW, objects[o].scrx);
    }
    else if (objects[o].ai.ray.direction==LEFT && objects[o].blockedl)
    {
       objects[o].x = (objects[o].x >> 4 >> CSF) << 4 << CSF;
       if (TileProperty[getmaptileat(objects[o].x>>CSF,objects[o].y>>CSF)][BRIGHT]) objects[o].x += (16<<CSF);
       //if (tiles[getmaptileat(objects[o].x>>CSF,objects[o].y>>CSF)].solidl) objects[o].x -= (16<<CSF);
       objects[o].ai.ray.state = RAY_STATE_SETZAPZOT;
       if (objects[o].onscreen) g_pSound->playStereofromCoord(SOUND_SHOT_HIT, PLAY_NOW, objects[o].scrx);
    }
  }

  switch(objects[o].ai.ray.state)
  {
  case RAY_STATE_FLY:
       // test if it hit a baddie
       for(i=1;i<MAX_OBJECTS;i++)
       {
         if (!objects[i].exists || i==o) continue;
         if (objects[o].ai.ray.dontHitEnable)
         {
           if (objects[i].type==objects[o].ai.ray.dontHit) continue;
         }

         if (objects[i].canbezapped)
         {
            if (hitdetect(i, o))
            {
              objects[o].ai.ray.state = RAY_STATE_SETZAPZOT;
              objects[i].zapped++;
            }
         }
       }
       // check if ray hit keen. if canpk=0, only enemy rays can hurt keen
       if (objects[o].touchPlayer)
       {
         if (player[objects[o].touchedBy].pfrozentime > PFROZEN_THAW && \
             levelcontrol.episode==1)
         {
            // shot a frozen player--melt the ice
            player[objects[o].touchedBy].pfrozentime = PFROZEN_THAW;
            objects[o].ai.ray.state = RAY_STATE_SETZAPZOT;
         }
         else
         {
            if (objects[o].ai.ray.dontHitEnable==0 || objects[o].ai.ray.dontHit!=OBJ_PLAYER)
            {
              killplayer(objects[o].touchedBy);
              objects[o].ai.ray.state = RAY_STATE_SETZAPZOT;
            }
         }
       }

       if (objects[o].ai.ray.direction == RIGHT)
       {
           // don't go through bonklethal tiles, even if they're not solid
           // (for the arms on mortimer's machine)
          /* if (tiles[getmaptileat((objects[o].x>>CSF)+sprites[objects[o].sprite].xsize, (objects[o].y>>CSF)+1)].bonklethal)
              hitlethal = 1;
           else if (tiles[getmaptileat((objects[o].x>>CSF)+sprites[objects[o].sprite].xsize, (objects[o].y>>CSF)+(sprites[objects[o].sprite].ysize-1))].bonklethal)
              hitlethal = 1;*/
           /*else*/ hitlethal = 0;

           if (objects[o].blockedr || hitlethal)
           {
              objects[o].ai.ray.state = RAY_STATE_SETZAPZOT;
              if (objects[o].onscreen) g_pSound->playStereofromCoord(SOUND_SHOT_HIT, PLAY_NOW, objects[o].scrx);
           }

           objects[o].x += RAY_SPEED;
       }
       else if (objects[o].ai.ray.direction == LEFT)
       {
           /*if (tiles[getmaptileat((objects[o].x>>CSF)-1, (objects[o].y>>CSF)+1)].bonklethal)
              hitlethal = 1;
           else if (tiles[getmaptileat((objects[o].x>>CSF)-1, (objects[o].y>>CSF)+(sprites[objects[o].sprite].ysize-1))].bonklethal)
              hitlethal = 1;*/
           /*else*/ hitlethal = 0;

           if (objects[o].blockedl || hitlethal)
           {
              objects[o].ai.ray.state = RAY_STATE_SETZAPZOT;
              if (objects[o].onscreen) g_pSound->playStereofromCoord(SOUND_SHOT_HIT, PLAY_NOW, objects[o].scrx);
           }

           objects[o].x -= RAY_SPEED;
       }
       else if (objects[o].ai.ray.direction == DOWN)
       {
           if (objects[o].blockedd || objects[o].blockedu)
           {
              objects[o].ai.ray.state = RAY_STATE_SETZAPZOT;
              if (objects[o].onscreen) g_pSound->playStereofromCoord(SOUND_SHOT_HIT, PLAY_NOW, objects[o].scrx);
           }

           objects[o].y += RAY_SPEED;
       }
  break;
  case RAY_STATE_SETZAPZOT:
       objects[o].ai.ray.state = RAY_STATE_ZAPZOT;
       objects[o].ai.ray.zapzottimer = RAY_ZAPZOT_TIME;

       if (levelcontrol.episode==1)
       {
         if (rand()&1)
           { objects[o].sprite = RAY_FRAME_ZAP_EP1; }
         else
           { objects[o].sprite = RAY_FRAME_ZOT_EP1; }
       }
       else if (levelcontrol.episode==2)
       {
         if (rand()&1)
           { objects[o].sprite = RAY_FRAME_ZAP_EP2; }
         else
           { objects[o].sprite = RAY_FRAME_ZOT_EP2; }
       }
       else
       {
         if (rand()&1)
           { objects[o].sprite = RAY_FRAME_ZAP_EP3; }
         else
           { objects[o].sprite = RAY_FRAME_ZOT_EP3; }
       }

       if (objects[o].ai.ray.direction==LEFT || objects[o].ai.ray.direction==RIGHT)
       {
         objects[o].y -= (2<<CSF);
       }
       else
       {
         objects[o].x -= (4<<CSF);
       }
       // ... and fall through
  case RAY_STATE_ZAPZOT:
       if (!objects[o].ai.ray.zapzottimer)
         { objects[o].exists = 0; }
       else objects[o].ai.ray.zapzottimer--;
  break;
  }
}