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commandergenius/src/ai/tankep2.cpp

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C++
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#include "../sdl/sound/CSound.h"
#include "../keen.h"
#include "../include/game.h"
#include "../include/enemyai.h"
// Tank Robot (Ep2)
#define TANK_LOOK 0
#define TANK_WALK 1
#define TANK2_SAME_LEVEL_TIME 150
#define TANK_REPEAT_FIRE_TIME 800
// when this probability is satisfied, there is 50% probability
// of a look, 50% probability of a fire.
#define TANK_LOOKFIRE_PROB 500
#define TANK_MINTRAVELDIST 200
#define TANK_WALK_SPEED 4
#define TANK_WALK_ANIM_TIME 60
#define TANK_LOOK_ANIM_TIME 110
#define TANK_LOOK_TOTALTIME 250
#define TANK2_PREPAREFIRE_TIME 80
// frames
#define TANK2_WALK_LEFT_FRAME 116
#define TANK2_WALK_RIGHT_FRAME 112
#define TANK2_LOOK_FRAME 120
#define TANKPUSHAMOUNT 16
#define TANK2_SHOTS_PER_VOLLEY 4
#define TANK2_MIN_TIME_TILL_CAN_FIRE 600
#define TANK2_MAX_TIME_TILL_CAN_FIRE 1000
#define TANK2_PAUSE_BEFORE_FIRST_SHOT 150
#define TANK2_TIME_BETWEEN_SHOTS 50
#define TANK2_TIME_BEFORE_FIRE_WHEN_SEE 100
#define TANK2_TIME_BETWEEN_FIRE_CAUSE_LEVEL 400
void tankep2_ai(int o, stCloneKeenPlus *pCKP)
{
int newobject;
//int not_about_to_fall;
unsigned int i;
if (objects[o].needinit)
{ // first time initilization
objects[o].ai.tank.state = TANK_WALK;
objects[o].ai.tank.movedir = RIGHT;
objects[o].ai.tank.fireafterlook = 0;
objects[o].ai.tank.animtimer = 0;
objects[o].ai.tank.timer = 0;
objects[o].ai.tank.dist_traveled = 0;
objects[o].ai.tank.timetillcanfire = TANK2_MAX_TIME_TILL_CAN_FIRE;
objects[o].ai.tank.firetimes = 0;
objects[o].ai.tank.detectedPlayer = 0;
objects[o].ai.tank.detectedPlayerIndex = primaryplayer;
objects[o].canbezapped = 1; // will stop bullets but is not harmed
objects[o].inhibitfall = 1;
objects[o].needinit = 0;
}
// touched player?
if (objects[o].touchPlayer && !player[objects[o].touchedBy].pdie)
{
killplayer(objects[o].touchedBy, pCKP);
}
switch(objects[o].ai.tank.state)
{
case TANK_LOOK:
objects[o].sprite = TANK2_LOOK_FRAME + objects[o].ai.tank.frame;
// animation
if (objects[o].ai.tank.animtimer > TANK_LOOK_ANIM_TIME)
{
objects[o].ai.tank.frame ^= 1;
objects[o].ai.tank.animtimer = 0;
} else objects[o].ai.tank.animtimer++;
// when time is up go back to moving
if (objects[o].ai.tank.timer > TANK_LOOK_TOTALTIME)
{
// decide what direction to go
if (objects[o].blockedr)
{ objects[o].ai.tank.movedir = LEFT; }
else if (objects[o].blockedl)
{ objects[o].ai.tank.movedir = RIGHT; }
else if (objects[o].x > player[0].x)
{ objects[o].ai.tank.movedir = LEFT; }
else
{ objects[o].ai.tank.movedir = RIGHT; }
objects[o].ai.tank.alreadyfiredcauseonsamelevel = 0;
objects[o].ai.tank.timetillcanfire = (rand()%(TANK2_MAX_TIME_TILL_CAN_FIRE-TANK2_MIN_TIME_TILL_CAN_FIRE))+TANK2_MIN_TIME_TILL_CAN_FIRE;
objects[o].ai.tank.timetillcanfirecauseonsamelevel = TANK2_TIME_BEFORE_FIRE_WHEN_SEE;
objects[o].ai.tank.firetimes = 0;
objects[o].ai.tank.state = TANK_WALK;
objects[o].ai.tank.frame = 0;
objects[o].ai.tank.animtimer = 0;
objects[o].ai.tank.timer = 0;
objects[o].ai.tank.dist_traveled = 0;
} else objects[o].ai.tank.timer++;
break;
case TANK_WALK:
// is keen on same level?
objects[o].ai.tank.detectedPlayer = 0;
for(i=0;i<numplayers;i++)
{
if (player[i].y >= objects[o].y-(12<<CSF))
{
if ((player[i].y>>CSF)+sprites[0].ysize <= (objects[o].y>>CSF)+sprites[objects[o].sprite].ysize+12)
{
objects[o].ai.tank.detectedPlayer = 1;
objects[o].ai.tank.detectedPlayerIndex = i;
break;
}
}
}
if (objects[o].ai.tank.detectedPlayer)
{
// facing keen?
objects[o].ai.tank.alreadyfiredcauseonsamelevel = 1;
// are we facing him?
if (((player[objects[o].ai.tank.detectedPlayerIndex].x < objects[o].x) && objects[o].ai.tank.movedir==LEFT) || \
((player[objects[o].ai.tank.detectedPlayerIndex].x > objects[o].x) && objects[o].ai.tank.movedir==RIGHT))
{ // yes, we're facing him! FIRE!!!
if (!objects[o].ai.tank.firetimes)
{
if (!objects[o].ai.tank.timetillcanfirecauseonsamelevel)
{
objects[o].ai.tank.firetimes = TANK2_SHOTS_PER_VOLLEY;
objects[o].ai.tank.timetillnextshot = TANK2_PAUSE_BEFORE_FIRST_SHOT;
objects[o].ai.tank.timetillcanfire = (rand()%(TANK2_MAX_TIME_TILL_CAN_FIRE-TANK2_MIN_TIME_TILL_CAN_FIRE))+TANK2_MIN_TIME_TILL_CAN_FIRE;
objects[o].ai.tank.timetillcanfirecauseonsamelevel = TANK2_TIME_BETWEEN_FIRE_CAUSE_LEVEL;
}
else objects[o].ai.tank.timetillcanfirecauseonsamelevel--;
}
}
else
{
// no we're not facing him, on hard difficulty turn around
if (pCKP->Control.levelcontrol.hardmode)
{
objects[o].ai.tank.frame = 0;
objects[o].ai.tank.timer = 0;
objects[o].ai.tank.animtimer = 0;
objects[o].ai.tank.state = TANK_LOOK;
}
}
}
else
{ // no, not on same level
objects[o].ai.tank.alreadyfiredcauseonsamelevel = 0;
}
// are we firing a volley?
if (objects[o].ai.tank.firetimes)
{
// is it time to fire the next shot in the volley?
if (!objects[o].ai.tank.timetillnextshot)
{
if (objects[o].onscreen) g_pSound->playStereofromCoord(SOUND_TANK_FIRE, PLAY_NOW, objects[o].scrx);
if (objects[o].ai.tank.movedir==RIGHT)
{
newobject = spawn_object(objects[o].x+(sprites[TANK2_WALK_RIGHT_FRAME].xsize<<CSF), objects[o].y+(6<<CSF), OBJ_RAY);
objects[newobject].ai.ray.direction = RIGHT;
}
else
{
newobject = spawn_object(objects[o].x-(sprites[ENEMYRAYEP2].xsize<<CSF), objects[o].y+(6<<CSF), OBJ_RAY);
objects[newobject].ai.ray.direction = LEFT;
}
objects[newobject].sprite = ENEMYRAYEP2;
objects[newobject].ai.ray.dontHitEnable = 0;
objects[o].ai.tank.timetillnextshot = TANK2_TIME_BETWEEN_SHOTS;
objects[o].ai.tank.firetimes--;
}
else
{
objects[o].ai.tank.timetillnextshot--;
}
}
else
{ // not firing a volley
if (!objects[o].ai.tank.timetillcanfire)
{
objects[o].ai.tank.firetimes = TANK2_SHOTS_PER_VOLLEY;
objects[o].ai.tank.timetillnextshot = TANK2_PAUSE_BEFORE_FIRST_SHOT;
objects[o].ai.tank.timetillcanfire = (rand()%(TANK2_MAX_TIME_TILL_CAN_FIRE-TANK2_MIN_TIME_TILL_CAN_FIRE))+TANK2_MIN_TIME_TILL_CAN_FIRE;
}
else
{
objects[o].ai.tank.timetillcanfire--;
}
}
if (!objects[o].ai.tank.firetimes) // can't walk while firing
{
if (objects[o].ai.tank.movedir==LEFT)
{ // move left
objects[o].sprite = TANK2_WALK_LEFT_FRAME + objects[o].ai.tank.frame;
if (!objects[o].blockedl)
{
objects[o].x -= TANK_WALK_SPEED;
objects[o].ai.tank.dist_traveled++;
}
else
{
objects[o].ai.tank.frame = 0;
objects[o].ai.tank.timer = 0;
objects[o].ai.tank.animtimer = 0;
objects[o].ai.tank.state = TANK_LOOK;
}
}
else
{ // move right
objects[o].sprite = TANK2_WALK_RIGHT_FRAME + objects[o].ai.tank.frame;
if (!objects[o].blockedr)
{
objects[o].x += TANK_WALK_SPEED;
objects[o].ai.tank.dist_traveled++;
}
else
{
objects[o].ai.tank.frame = 0;
objects[o].ai.tank.timer = 0;
objects[o].ai.tank.animtimer = 0;
objects[o].ai.tank.state = TANK_LOOK;
}
}
}
// hover animation
if (objects[o].ai.tank.animtimer > TANK_WALK_ANIM_TIME)
{
if (objects[o].ai.tank.frame>=3) objects[o].ai.tank.frame=0;
else objects[o].ai.tank.frame++;
objects[o].ai.tank.animtimer = 0;
} else objects[o].ai.tank.animtimer++;
break;
}
}
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