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ANAL.C
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ANAL.C
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/*
* ANAL INVADERS megagame!
*
* Shows how to use music & sound effects together, make a sound setup menu
* and how to pan the sfx according to the "location" the sound comes from.
*
* Like JP, this sets up the signal handlers & uses IRQ0 to update the sound.
*
* Channels used:
* 0-3 Music
* 4 Menumove & menuselect effect
* 5-6 Fart at the exit
* 7 Player shot effect
* 8 Enemy shot effect
* 9 Explosion effect
*
* This code is shitty!
*
* In V2.01 the player bounds checking was corrected!
* V2.03 a custom keyboard handler was added!
* V2.04y mixer changing is supported and ESC moves bacwards in menus
* V2.06y support for more volume levels was added
*/
#include <stdlib.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <conio.h>
#include <mem.h>
#include <dos.h>
#ifdef __DJGPP__
#include <unistd.h>
#include <go32.h>
#include <dpmi.h>
#include <sys/nearptr.h>
#else
#define __djgpp_conventional_base 0
#endif
#include "judas.h"
#include "timer.h"
#include "kbd.h"
#define MAX_OBJECTS 250
#define MAX_STARS 50
#define OT_NONE 0
#define OT_PLAYER 1
#define OT_ENEMY 2
#define OT_PLAYERSHOT 3
#define OT_ENEMYSHOT 4
#define OT_EXPLOSION 5
typedef struct
{
int x;
int y;
int sx;
int sy;
int time;
int type;
} OBJECT;
typedef struct
{
int x;
int y;
int sx;
} STAR;
unsigned mixratetable[] =
{
5513,
8269,
11025,
16538,
22050,
33075,
44100
};
char *onofftext[] =
{
"OFF",
"ON",
};
char *mainmenutext[] =
{
"Start The Massacre",
"Setup Sound",
"Quit To The Realms Of MS-DOS"
};
unsigned char colortable[] =
{
0, 8, 5, 9, 7, 14, 15
};
unsigned char expshapetable[] =
{
176, 176, 176, 177, 177, 177, 178, 219
};
unsigned char expcolortable[] =
{
4, 4, 6, 6, 12, 12, 14, 15
};
char *scrbuffer;
char textbuffer[80];
int mixrate;
int mixer;
int interpolation;
int musicvol;
int sfxvol;
int mainmenuchoice = 0;
int soundmenuchoice = 0;
int score = 0;
int hiscore = 0;
int lives = 0;
int diff = 0;
SAMPLE *fart;
SAMPLE *explosion;
SAMPLE *plrshoot;
SAMPLE *menumove;
SAMPLE *menuselect;
OBJECT object[MAX_OBJECTS];
STAR star[MAX_STARS];
int main(void);
void mainmenu(void);
void playgame(void);
void initstars(void);
void movestars(void);
void drawstars(void);
void initobjects(void);
void drawobjects(void);
void initplayer(void);
void moveplayer(void);
void moveobjects(void);
void spawnenemy(void);
void checkplayershots(void);
void checkenemies(void);
void createexplosion(int x, int y, int pieces);
int scalepanning(int x);
void soundmenu(void);
void resetmode(void);
void loadconfig(void);
void saveconfig(void);
void fliptob8000(void);
void clearscreen(void);
void printtext(int x, int y, int color, const char *text);
void printtextc(int y, int color, const char *text);
static void handle_int(int a);
int main(void)
{
mixrate = 4;
mixer = FASTMIXER;
interpolation = 0;
musicvol = 50;
sfxvol = 50;
#ifdef __DJGPP__
if (__djgpp_nearptr_enable() == 0) {
printf("ERROR: Couldn't enable near pointers for DJGPP!\n");
return 1;
}
/* Trick: Avoid re-setting DS selector limit on each memory allocation call */
__djgpp_selector_limit = 0xffffffff;
#endif
atexit(judas_uninit);
atexit(timer_uninit);
atexit(kbd_uninit);
signal(SIGINT, handle_int);
#if defined(SIGBREAK)
signal(SIGBREAK, handle_int);
#endif
srand(666 + *( (unsigned *) ((unsigned char *)0x46c + __djgpp_conventional_base) ));
resetmode();
scrbuffer = malloc(80 * 25 * 2);
if (!scrbuffer)
{
printf("ERROR: No Memory For Virtual Screen!");
return 666;
}
loadconfig();
judas_config();
if (!judas_init(mixratetable[mixrate], mixer, SIXTEENBIT | STEREO, interpolation))
{
printf("JUDAS ERROR: %s\n", judas_errortext[judas_error]);
return 666;
}
kbd_init();
timer_init(0x4280, judas_update);
judas_setmusicmastervolume(4, musicvol);
judas_setsfxmastervolume(4, sfxvol);
judas_loadxm("tune1.xm");
judas_playxm(0);
fart = judas_loadwav("fart.wav");
explosion = judas_loadwav("explsion.wav");
plrshoot = judas_loadwav("plrshoot.wav");
menumove = judas_loadwav("menumove.wav");
menuselect = judas_loadwav("menusel.wav");
mainmenu();
judas_playsample(fart, 5, 22050, 64*256, LEFT);
judas_playsample(fart, 6, 22050, 64*256, RIGHT);
sleep(1);
saveconfig();
resetmode();
return 0;
}
void resetmode(void)
{
union REGS glenregs;
glenregs.w.ax = 0x0003;
int386(0x10, &glenregs, &glenregs);
}
void mainmenu(void)
{
for(;;)
{
int count;
int key;
clearscreen();
printtextc(6, 15, "-+* ANAL INVADERS And The DEFENDERS OF THE RECTUM *+-");
printtextc(8, 14, "Megagame by Cadaver!");
sprintf(textbuffer, "LAST SCORE:%06d HISCORE:%06d", score, hiscore);
printtextc(11, 10, textbuffer);
for (count = 0; count < 3; count++)
{
int color = 7;
if (mainmenuchoice == count) color = 15;
printtextc(15 + count, color, mainmenutext[count]);
}
fliptob8000();
do
{
key = kbd_getkey();
} while (!key);
switch(key)
{
case KEY_ESC:
judas_playsample(menumove, 4, 22050, 64*256, MIDDLE);
mainmenuchoice = 3;
case KEY_UP:
judas_playsample(menumove, 4, 22050, 64*256, MIDDLE);
mainmenuchoice--;
if (mainmenuchoice < 0) mainmenuchoice = 2;
break;
case KEY_DOWN:
judas_playsample(menumove, 4, 22050, 64*256, MIDDLE);
mainmenuchoice++;
if (mainmenuchoice > 2) mainmenuchoice = 0;
break;
case KEY_SPACE:
case KEY_ENTER:
judas_playsample(menuselect, 4, 22050, 64*256, MIDDLE);
switch(mainmenuchoice)
{
case 0:
judas_loadxm("tune2.xm");
judas_playxm(0);
playgame();
judas_loadxm("tune1.xm");
judas_playxm(0);
break;
case 1:
soundmenu();
break;
case 2:
goto EXITTODOS;
}
break;
}
}
EXITTODOS:
return;
}
void soundmenu(void)
{
int soundmenuchoice = 0;
for(;;)
{
int count;
int key;
clearscreen();
printtextc(6, 15, "-+* ANAL INVADERS And The DEFENDERS OF THE RECTUM *+-");
printtextc(8, 14, "Megagame by Cadaver!");
sprintf(textbuffer, "LAST SCORE:%06d HISCORE:%06d", score, hiscore);
printtextc(11, 10, textbuffer);
for (count = 0; count < 6; count++)
{
int color = 7;
if (soundmenuchoice == count) color = 15;
switch(count)
{
case 0:
sprintf(textbuffer, "Mixrate: %d", mixratetable[mixrate]);
break;
case 1:
sprintf(textbuffer, "Interpolation: %s", judas_ipmodename[interpolation]);
break;
case 2:
sprintf(textbuffer, "Music Volume: %d", musicvol);
break;
case 3:
sprintf(textbuffer, "Sfx Volume: %d", sfxvol);
break;
case 4:
sprintf(textbuffer, "Mixer: %s", judas_mixername[mixer]);
break;
case 5:
sprintf(textbuffer, "Exit To Previous Menu");
break;
}
printtextc(14 + count, color, textbuffer);
}
fliptob8000();
do
{
key = kbd_getkey();
} while (!key);
switch(key)
{
case KEY_ESC:
judas_playsample(menuselect, 4, 22050, 64*256, MIDDLE);
goto EXITTOMAIN;
case KEY_UP:
judas_playsample(menumove, 4, 22050, 64*256, MIDDLE);
soundmenuchoice--;
if (soundmenuchoice < 0) soundmenuchoice = 5;
break;
case KEY_DOWN:
judas_playsample(menumove, 4, 22050, 64*256, MIDDLE);
soundmenuchoice++;
if (soundmenuchoice > 5) soundmenuchoice = 0;
break;
case KEY_LEFT:
judas_playsample(menumove, 4, 22050, 64*256, MIDDLE);
switch(soundmenuchoice)
{
case 0:
mixrate--;
if (mixrate < 0) mixrate = 0;
judas_init(mixratetable[mixrate], mixer, SIXTEENBIT | STEREO, interpolation);
break;
case 1:
interpolation = 0;
judas_init(mixratetable[mixrate], mixer, SIXTEENBIT | STEREO, interpolation);
break;
case 2:
if (musicvol > 10) {
musicvol -= 10;
} else musicvol -= 1;
if (musicvol < 0) musicvol = 0;
judas_setmusicmastervolume(4, musicvol);
break;
case 3:
if (sfxvol > 10) {
sfxvol -= 10;
} else sfxvol -= 1;
if (sfxvol < 0) sfxvol = 0;
judas_setsfxmastervolume(4, sfxvol);
break;
case 4:
mixer = FASTMIXER;
judas_init(mixratetable[mixrate], mixer, SIXTEENBIT | STEREO, interpolation);
break;
}
break;
case KEY_RIGHT:
judas_playsample(menumove, 4, 22050, 64*256, MIDDLE);
switch(soundmenuchoice)
{
case 0:
mixrate++;
if (mixrate > 6) mixrate = 6;
judas_init(mixratetable[mixrate], mixer, SIXTEENBIT | STEREO, interpolation);
break;
case 1:
interpolation = 1;
judas_init(mixratetable[mixrate], mixer, SIXTEENBIT | STEREO, interpolation);
break;
case 2:
if (musicvol >= 10) {
musicvol += 10;
} else musicvol += 1;
if (musicvol > 100) musicvol = 100;
judas_setmusicmastervolume(4, musicvol);
break;
case 3:
if (sfxvol >= 10) {
sfxvol += 10;
} else sfxvol += 1;
if (sfxvol > 100) sfxvol = 100;
judas_setsfxmastervolume(4, sfxvol);
break;
case 4:
mixer = QUALITYMIXER;
judas_init(mixratetable[mixrate], mixer, SIXTEENBIT | STEREO, interpolation);
break;
}
break;
case KEY_SPACE:
case KEY_ENTER:
switch(soundmenuchoice)
{
case 5:
judas_playsample(menuselect, 4, 22050, 64*256, MIDDLE);
goto EXITTOMAIN;
}
break;
}
}
EXITTOMAIN:
return;
}
void playgame(void)
{
int delay = 0;
int deathcounter = 0;
int nextlife = 10000;
diff = 0;
lives = 3;
score = 0;
initstars();
initobjects();
initplayer();
timer_count = 0;
for (;;)
{
int speed;
while (!timer_count)
{
}
speed = timer_count;
if (speed > 8) speed = 8;
timer_count = 0;
while (speed)
{
movestars();
moveplayer();
moveobjects();
spawnenemy();
checkplayershots();
checkenemies();
if (score > hiscore) hiscore = score;
if (score >= nextlife)
{
judas_playsample(menuselect, 4, 22050, 64*256, MIDDLE);
lives++;
nextlife += 10000;
}
delay++;
if (delay == 1500)
{
delay = 0;
diff++;
if (diff > 50) diff = 50;
}
speed--;
if (!object[0].type)
{
deathcounter++;
if ((!lives) && (!(rand() % 7)))
{
int x = rand() % 640;
judas_playsample(explosion, 9, 22050, 64*256, scalepanning(x));
createexplosion(x, rand() % 200, 10 + rand() % 20);
}
if (deathcounter >= 280)
{
deathcounter = 0;
if (lives)
{
initobjects();
initplayer();
}
else
{
return;
}
}
}
}
clearscreen();
drawstars();
drawobjects();
sprintf(textbuffer, "SCORE:%06d", score);
printtext(1, 23, 10, textbuffer);
sprintf(textbuffer, "LIVES:%02d", lives);
printtext(36, 23, 10, textbuffer);
sprintf(textbuffer, "HISCORE:%06d", hiscore);
printtext(65, 23, 10, textbuffer);
if (!lives)
{
printtextc(10, 15, "G A M E O V E R");
printtextc(12, 12, "The Anal Invaders infiltrate Earth!");
printtextc(13, 12, "Everyone will suffer from hemorrhoids!");
}
fliptob8000();
if (checkkey(KEY_ESC)) break;
}
}
void initobjects(void)
{
int count;
OBJECT *optr = &object[1];
for (count = MAX_OBJECTS - 1; count; count--)
{
optr->type = OT_NONE;
optr++;
}
}
void initplayer(void)
{
OBJECT *optr = &object[0];
optr->type = OT_PLAYER;
optr->x = 32;
optr->y = 100;
optr->time = 0;
}
void moveplayer(void)
{
OBJECT *optr = &object[0];
if (optr->type != OT_PLAYER) return;
if (optr->time) optr->time--;
if (kt[KEY_UP])
{
optr->y -= 2;
if (optr->y < 0) optr->y = 0;
}
if (kt[KEY_DOWN])
{
optr->y += 2;
if (optr->y > 199) optr->y = 199;
}
if (kt[KEY_LEFT])
{
optr->x -= 4;
if (optr->x < 0) optr->x = 0;
}
if (kt[KEY_RIGHT])
{
optr->x += 4;
if (optr->x > 639) optr->x = 639;
}
if (kt[KEY_SPACE])
{
if (!optr->time)
{
OBJECT *fptr = &object[1];
int f;
for (f = MAX_OBJECTS - 1; f; f--)
{
if (!fptr->type)
{
judas_playsample(plrshoot, 7, 22050, 64*256, scalepanning(optr->x));
optr->time = 12;
fptr->type = OT_PLAYERSHOT;
fptr->x = optr->x;
fptr->y = optr->y;
fptr->sx = 8;
break;
}
fptr++;
}
}
}
}
void moveobjects(void)
{
int count;
OBJECT *optr = &object[1];
for (count = MAX_OBJECTS - 1; count; count--)
{
switch(optr->type)
{
case OT_NONE:
break;
case OT_PLAYERSHOT:
optr->x += optr->sx;
if (optr->x >= 640) optr->type = OT_NONE;
break;
case OT_ENEMYSHOT:
optr->x += optr->sx;
optr->y += optr->sy;
optr->time--;
if (optr->time <= 0) optr->type = OT_NONE;
break;
case OT_EXPLOSION:
optr->x += optr->sx;
optr->y += optr->sy;
optr->time--;
if (optr->time & 1) optr->sy++;
if (optr->time <= 0) optr->type = OT_NONE;
break;
case OT_ENEMY:
optr->x += optr->sx;
optr->y -= optr->sy;
optr->time--;
if (optr->time <= 0)
{
optr->sx = (rand() % 7) - 5;
optr->sy = (rand() % 5) - 2;
optr->time = (rand() % 20) + 5;
if ((rand() % 60) < diff)
{
OBJECT *fptr = &object[1];
int f;
for (f = MAX_OBJECTS - 1; f; f--)
{
if (!fptr->type)
{
judas_playsample(fart, 8, 44100, 40*256, scalepanning(optr->x));
fptr->type = OT_ENEMYSHOT;
fptr->x = optr->x;
fptr->y = optr->y;
fptr->sx = (object[0].x - optr->x) / 70;
fptr->sy = (object[0].y - optr->y) / 70;
fptr->time = 80;
break;
}
fptr++;
}
}
}
if ((optr->x >= 680) || (optr->x < -40) || (optr->y >= 240) || (optr->y < -40))
optr->type = OT_NONE;
break;
}
optr++;
}
}
void checkplayershots(void)
{
int count;
OBJECT *optr = &object[1];
for (count = MAX_OBJECTS - 1; count; count--)
{
if (optr->type == OT_PLAYERSHOT)
{
OBJECT *tptr = &object[1];
int tcount;
for (tcount = MAX_OBJECTS - 1; tcount; tcount--)
{
if (tptr->type == OT_ENEMY)
{
if ((abs(optr->x - tptr->x) < 8) && (abs(optr->y - tptr->y) < 8))
{
judas_playsample(explosion, 9, 22050, 64*256, scalepanning(optr->x));
optr->type = OT_NONE;
tptr->type = OT_NONE;
score += 100;
createexplosion(optr->x, optr->y, 10);
break;
}
}
tptr++;
}
}
optr++;
}
}
void checkenemies(void)
{
int count;
OBJECT *optr = &object[1];
if (!object[0].type) return;
for (count = MAX_OBJECTS - 1; count; count--)
{
if ((optr->type == OT_ENEMYSHOT) || (optr->type == OT_ENEMY))
{
if ((abs(optr->x - object[0].x) < 8) && (abs(optr->y - object[0].y) < 8))
{
judas_playsample(explosion, 9, 22050, 64*256, scalepanning(optr->x));
lives--;
optr->type = OT_NONE;
object[0].type = OT_NONE;
createexplosion(optr->x, optr->y, 30);
break;
}
}
optr++;
}
}
void createexplosion(int x, int y, int pieces)
{
int count;
OBJECT *optr = &object[1];
for (count = MAX_OBJECTS - 1; count; count--)
{
if (!optr->type)
{
optr->type = OT_EXPLOSION;
optr->x = x;
optr->y = y;
optr->sx = (rand() % 9) - 4;
optr->sy = -(rand() % 9);
optr->time = (rand() % 64) + 64;
pieces--;
if (!pieces) break;
}
optr++;
}
}
void drawobjects(void)
{
int count;
OBJECT *optr = &object[0];
for (count = MAX_OBJECTS; count; count--)
{
if ((optr->type) && (optr->x >= 0) && (optr->y >= 0) && (optr->x < 640) && (optr->y < 200))
{
unsigned char *dptr = scrbuffer + (((optr->x >> 3) + (optr->y >> 3) * 80) << 1);
switch(optr->type)
{
case OT_PLAYER:
dptr[0] = 16;
dptr[1] = 10;
break;
case OT_PLAYERSHOT:
dptr[0] = 7;
dptr[1] = 15;
break;
case OT_ENEMYSHOT:
dptr[0] = 15;
dptr[1] = (rand() % 15) + 1;
break;
case OT_ENEMY:
dptr[0] = 2;
dptr[1] = 2;
break;
case OT_EXPLOSION:
dptr[0] = expshapetable[optr->time / 16];
dptr[1] = expcolortable[optr->time / 16];
break;
}
}
optr++;
}
}
void spawnenemy(void)
{
int count;
OBJECT *optr = &object[1];
if ((rand() % 666) < (650 - diff * 3)) return;
for (count = MAX_OBJECTS - 1; count; count--)
{
if (!optr->type)
{
optr->type = OT_ENEMY;
optr->x = 640;
optr->y = rand() % 200;
optr->sx = (rand() % 3) - 4;
optr->sy = (rand() % 5) - 2;
optr->time = (rand() % 20) + 5;
break;
}
optr++;
}
}
void initstars(void)
{
int count;
STAR *sptr = &star[0];
for (count = MAX_STARS; count; count--)
{
sptr->x = rand() % 640;
sptr->y = rand() % 200;
sptr->sx = (rand() % 6) + 1;
sptr++;
}
}
void movestars(void)
{
int count;
STAR *sptr = &star[0];
for (count = MAX_STARS; count; count--)
{
sptr->x -= sptr->sx;
if (sptr->x < 0)
{
sptr->x = 640;
sptr->y = rand() % 200;
sptr->sx = (rand() % 6) + 1;
}
sptr++;
}
}
void drawstars(void)
{
int count;
STAR *sptr = &star[0];
for (count = MAX_STARS; count; count--)
{
if ((sptr->x >= 0) && (sptr->y >= 0) && (sptr->x < 640) && (sptr->y < 200))
{
unsigned char *dptr = scrbuffer + (((sptr->x >> 3) + (sptr->y >> 3) * 80) << 1);
dptr[0] = 250;
dptr[1] = colortable[sptr->sx];
}
sptr++;
}
}
/*
* Scales the x-coordinates used in the game (0-639) on the 0-255 panning
* scale.
*/
int scalepanning(int x)
{
int panning = (x * 4) / 10;
if (panning < 0) panning = 0;
if (panning > 255) panning = 255;
return panning;
}
void loadconfig(void)
{
FILE *file = fopen("anal.cfg", "rt");
if (!file) return;
fscanf(file, "%d %d %d %d %d", &mixrate, &mixer, &interpolation, &musicvol, &sfxvol);
}
void saveconfig(void)
{
FILE *file = fopen("anal.cfg", "wt");
if (!file) return;
fprintf(file, "%d %d %d %d %d", mixrate, mixer, interpolation, musicvol, sfxvol);
}
void clearscreen(void)
{
memset(scrbuffer, 0, 80 * 25 * 2);
}
void printtext(int x, int y, int color, const char *text)
{
unsigned char *dptr = scrbuffer + ((x + y * 80) << 1);
while (*text)
{
*dptr++ = *text++;
*dptr++ = color;
}
}
void printtextc(int y, int color, const char *text)
{
int x = (80 - strlen(text)) / 2;
unsigned char *dptr = scrbuffer + ((x + y * 80) << 1);
while (*text)
{
*dptr++ = *text++;
*dptr++ = color;
}
}
void fliptob8000(void)
{
memcpy((char *)0xb8000 + __djgpp_conventional_base, scrbuffer, 80 * 25 * 2);
}
static void handle_int(int a)
{
resetmode(); /* To prevent user panic when no cursor is seen! */
exit(0); /* Atexit functions will be called! */
}