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game.c
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game.c
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/*------------------------------------------------------------------
game.c:
XINVADERS 3D - 3d Shoot'em up
Copyright (C) 2000 Don Llopis
+Copyright(C) 2023 Jose Da Silva
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
------------------------------------------------------------------*/
#include "game.h"
#include "gtext.h"
#include <unistd.h>
#define SW_UPDATE gv->sw_t += gv->msec
#define SW_PAUSE gv->sw_save = gv->sw_t
#define SW_UNPAUSE gv->sw_t = gv->sw_save
#define SW_RESET gv->sw_t = gv->sw_save = 0
static VEC cam_up = { 0.0f, 1.0f, 0.0f, 1.0f };
static VEC cam_from = { 0.0f, 0.0f, 100.0f, 1.0f };
static VEC cam_at = { 0.0f, 0.0f, 0.0f, 1.0f };
static void Add_obj_2_world ( OBJECT * );
static void Clear_obj_list ( void );
static void Sort_obj_list ( void );
static void Draw_obj_list ( MAT, MAT );
static int Z_compare ( const void *obj0, const void *obj1 );
static float Dist_pt_2_line ( VEC p, VEC l0, VEC l1 );
static void Draw_vector_font ( int *s[], int x, int y, unsigned int color );
/*------------------------------------------------------------------
* Variables
------------------------------------------------------------------*/
GAMEVARS gvars, *gv;
TIMER gtimer, *gt;
static long
score_table[ZONE_HEIGHT_MAX] = { 10L, 50L, 100L, 150L, 200L };
/*================================================================*/
static void Game_scores ( long new_score, int focus )
{
int i;
char buffer[256], tmp_num[2];
if ( focus )
{
if ( new_score > gv->pscore2 )
{
gv->pscore2 = new_score;
/* convert hi-score into a vector-font */
sprintf ( buffer, "%ld", new_score );
tmp_num[0] = '0';
tmp_num[1] = '\0';
for ( i = 0; buffer[i]; i++ )
{
tmp_num[0] = buffer[i];
gv->pscore_c2[i] = NUMBER[atoi(tmp_num)];
}
gv->pscore_c2[i] = NULL;
}
}
else
{
/* let's reserve hi_score for lone defender */
if ( gv->pduel == 0 && new_score > gv->hi_score )
{
gv->hi_score = new_score;
sprintf ( buffer, "%ld", new_score );
tmp_num[0] = '0';
tmp_num[1] = '\0';
for ( i = 0; buffer[i]; i++ )
{
tmp_num[0] = buffer[i];
gv->hi_score_c[i] = NUMBER[atoi(tmp_num)];
}
gv->hi_score_c[i] = NULL;
}
if ( new_score > gv->pscore1 ) {
gv->pscore1 = new_score;
/* convert hi-score into a vector-font */
sprintf ( buffer, "%ld", new_score );
tmp_num[0] = '0';
tmp_num[1] = '\0';
for ( i = 0; buffer[i]; i++ )
{
tmp_num[0] = buffer[i];
gv->pscore_c1[i] = NUMBER[atoi(tmp_num)];
}
gv->pscore_c1[i] = NULL;
}
}
}
static void Game_scores_draw ( void )
{
if ( gv->pduel )
{
if ( gv->phorizontal )
{
Draw_vector_font ( SCORE, 30, 8, RED );
Draw_vector_font ( gv->pscore_c1, 210, 8, RED );
Draw_vector_font ( SCORE, 30, 248, GREEN );
Draw_vector_font ( gv->pscore_c2, 210, 248, GREEN );
}
else if ( gv->pvertical )
{
Draw_vector_font ( SCORE, 30, 8, RED );
Draw_vector_font ( gv->pscore_c1, 30, 48, RED );
Draw_vector_font ( SCORE, 350, 8, GREEN );
Draw_vector_font ( gv->pscore_c2, 350, 48, GREEN );
}
else
{
Draw_vector_font ( SCORE, 30, 8, RED );
Draw_vector_font ( gv->pscore_c1, 30, 48, RED );
Draw_vector_font ( SCORE, 350, 248, GREEN );
Draw_vector_font ( gv->pscore_c2, 350, 288, GREEN );
}
}
else
{
Draw_vector_font ( SCORE, 150, 14, GREEN );
Draw_vector_font ( gv->pscore_c1, 330, 14, GREEN );
}
}
/*================================================================*/
void Game_main ( void )
{
while ( Handle_events() )
{
/* get start-time of current frame */
gv->msec = Timer_msec ( gt );
gv->ftime = (double)gv->msec/1000L;
gv->fps = 1.0 / gv->ftime;
gv->fadjust = gv->rfps / gv->fps;
(*Game_actionfn)();
Update_display ();
/* let game sleep for about 10msec */
if ( gv->fpsfast )
{
gv->fpsavg = ( gv->fpsavg + gv->fps ) / 2;
if ( gv->fpsavg > 100 )
gv->fpsfast--;
}
else
usleep(10000);
}
}
/*================================================================*/
void (*Game_actionfn) ();
/*================================================================*/
int Game_init ( float win_width, float win_height )
{
/* initialize variables and timers */
gv = &gvars;
gv->win_width = (long)win_width;
gv->win_height = (long)win_height;
gv->pduel = gv->phorizontal = gv->pvertical = 0;
gv->x1l = gv->y1t = 0;
gv->x1r = (int)gv->win_width;
gv->y1b = (int)gv->win_height;
Game_init_vars ( INITGAME );
Game_init_keys ();
Stars_init ();
Jumpgate_init ();
Camera_init ( win_width, win_height, 0.785398163 );
gt = >imer;
Timer_init( gt );
/* setup stopwatch timer and run menu */
SW_RESET;
Game_actionfn = Game_menu;
return TRUE;
}
/*================================================================*/
void Game_init_vars ( int init_type )
{
switch ( init_type )
{
case INITGAME:
gv->rfps = REFERENCE_FRAMERATE;
gv->display_fps = FALSE;
gv->fpsavg = -1000000;
gv->fpsfast = 1000;
gv->pscore1 = 0;
gv->hi_score = -1;
Game_scores ( HISCORE, 0 );
case NEWGAME:
gv->paused = FALSE;
gv->gameover = FALSE;
gv->pscore2 = -1;
Game_scores ( 0, 1 );
gv->pscore1 = -1;
Game_scores ( 0, 0 );
gv->pbonus1 = gv->pbonus2 = 0;
gv->plives1 = gv->plives2 = PLAYER_LIVES_START;
case NEWLEVEL:
gv->fcount = 0;
gv->msec = 0;
gv->ftime = 0.0;
gv->fps = 0.0;
gv->fadjust = 0.0;
gv->new_level = FALSE;
gv->pfocus = 0;
default:
break;
}
}
/*================================================================*/
void Game_init_keys ( void )
{
gv->key_QUIT = FALSE;
gv->key_FIRE1 = FALSE;
gv->key_UP1 = FALSE;
gv->key_DOWN1 = FALSE;
gv->key_LEFT1 = FALSE;
gv->key_RIGHT1 = FALSE;
gv->key_1PLAYER = FALSE;
gv->key_DUELPLAY_H = FALSE;
gv->key_DUELPLAY_V = FALSE;
gv->key_DUELPLAY = FALSE;
gv->key_FIRE2 = FALSE;
gv->key_UP2 = FALSE;
gv->key_DOWN2 = FALSE;
gv->key_LEFT2 = FALSE;
gv->key_RIGHT2 = FALSE;
}
/*================================================================*/
void Game_newlevel ( void )
{
srand ( time( NULL ) );
Game_init_vars ( NEWLEVEL );
Game_init_keys ();
Stars_init ();
Explosions_clear ();
Jumpgate_init ();
One_up_init ();
Player_init ( 0 );
Player_init ( 1 );
Aliens_init ();
SW_RESET;
Game_actionfn = Game_ready;
}
/*================================================================*/
void Game_menu ( void )
{
static int blink = 0;
static int color = 0;
int i;
MAT cam_mat;
Camera_transform ( cam_mat, cam_up, cam_from, cam_at, 0 );
Stars_draw ( cam_mat, cam_mat );
if ( gv->pduel )
Game_scores_draw ();
else
{
Draw_vector_font ( HI_SCORE, 120, 15, GREEN );
Draw_vector_font ( gv->hi_score_c, 360, 15, GREEN );
}
blink += gv->msec;
if ( blink > 250 )
{
color++;
blink -= 250;
if ( color > 3 ) color = 0;
}
i = RED - ( color * 15 );
Draw_vector_font ( XINVADERS3D_LOGO, 160, 150, GREEN );
Draw_vector_font ( PRESS, 40, 400, i );
Draw_vector_font ( FIRE, 220, 400, i );
Draw_vector_font ( TO, 370, 400, i );
Draw_vector_font ( START, 460, 400, i );
if ( gv->key_FIRE1 || ( gv->pduel && gv->key_FIRE2 ) )
{
Game_actionfn = Game_newlevel;
}
if ( gv->key_1PLAYER )
{
gv->pduel = gv->phorizontal = gv->pvertical = 0;
gv->x1l = -(int)(gv->win_width); /* let x11 chop this */
gv->y1t = -(int)(gv->win_height); /* let x11 chop this */
gv->x1r = (int)(gv->win_width)*2; /* let x11 chop this */
gv->y1b = (int)(gv->win_height)*2; /* let x11 chop this */
}
else if ( gv->key_DUELPLAY_H )
{
gv->pduel = gv->phorizontal = 1;
gv->pvertical = 0;
gv->x1l = -(int)(gv->win_width); /* let x11 chop this */
gv->y1t = -(int)(gv->win_height); /* let x11 chop this */
gv->x1r = (int)(gv->win_width)*2; /* let x11 chop this */
gv->y1b = (int)(gv->win_height)/2;
gv->x2l = -(int)(gv->win_width); /* let x11 chop this */
gv->y2t = (int)(gv->win_height)/2 + 1;
gv->x2r = (int)(gv->win_width)*2; /* let x11 chop this */
gv->y2b = (int)(gv->win_height)*2; /* let x11 chop this */
}
else if ( gv->key_DUELPLAY_V )
{
gv->pduel = gv->pvertical = 1;
gv->phorizontal = 0;
gv->x1l = -(int)(gv->win_width); /* let x11 chop this */
gv->y1t = -(int)(gv->win_height); /* let x11 chop this */
gv->x1r = (int)(gv->win_width)/2;
gv->y1b = (int)(gv->win_height)*2; /* let x11 chop this */
gv->x2l = (int)(gv->win_width)/2 + 1;
gv->y2t = -(int)(gv->win_height); /* let x11 chop this */
gv->x2r = (int)(gv->win_width)*2; /* let x11 chop this */
gv->y2b = (int)(gv->win_height)*2; /* let x11 chop this */
}
else if ( gv->key_DUELPLAY )
{
gv->pduel = 1;
gv->phorizontal = gv->pvertical = 0;
gv->x1l = -(int)(gv->win_width); /* let x11 chop this */
gv->y1t = -(int)(gv->win_height); /* let x11 chop this */
gv->x1r = (int)(gv->win_width)/2;
gv->y1b = (int)(gv->win_height)/2;
gv->x2l = (int)(gv->win_width)/2 + 1;
gv->y2t = (int)(gv->win_height)/2 + 1;
gv->x2r = (int)(gv->win_width)*2; /* let x11 chop this */
gv->y2b = (int)(gv->win_height)*2; /* let x11 chop this */
}
}
/*================================================================*/
void Game_ready ( void )
{
static int blink = 0;
static int color = 0;
int i;
MAT cam_mat;
Camera_transform ( cam_mat, cam_up, cam_from, cam_at, 0 );
Stars_draw ( cam_mat, cam_mat );
blink += gv->msec;
if ( blink > 250 )
{
blink -= 250;
color++;
if ( color == 3 )
color = 0;
}
i = RED - ( color * 15 );
Draw_vector_font ( GET, 140, 200, i );
Draw_vector_font ( READY, 260, 200, i );
Game_overlay ();
SW_UPDATE;
if ( gv->key_FIRE1 || gv->sw_t > READY_TIME || \
( gv->pduel && gv->key_FIRE2 ) )
{
SW_RESET;
Game_actionfn = Game_run;
}
}
/*================================================================*/
void Game_paused_toggle ( void )
{
static void (*saved_action_fn)( void ) = NULL;
gv->paused ^= TRUE;
if ( gv->paused )
{
SW_PAUSE;
saved_action_fn = Game_actionfn;
Game_actionfn = Game_paused;
}
else
{
SW_UNPAUSE;
Game_actionfn = saved_action_fn;
}
}
void Game_paused ( void )
{
MAT cam_mat;
Camera_transform ( cam_mat, cam_up, cam_from, cam_at, 0 );
Stars_draw ( cam_mat, cam_mat );
Draw_vector_font ( PAUSED, 230, 200, RED );
Game_overlay ();
SW_UPDATE;
}
/*================================================================*/
void Game_reset ( void )
{
SW_RESET;
Game_init_vars ( INITGAME );
Game_init_keys ();
Game_actionfn = Game_menu;
}
void Game_gameover ( void )
{
MAT cam_mat1, cam_mat2;
Camera_transform ( cam_mat1, cam_up, cam_from, cam_at, 0 );
Camera_transform ( cam_mat2, cam_up, cam_from, cam_at, 1 );
Stars_draw ( cam_mat1, cam_mat2 );
Draw_vector_font ( GAME, 185, 200, RED );
Draw_vector_font ( OVER, 335, 200, RED );
Game_overlay ();
SW_UPDATE;
if ( gv->key_FIRE1 || gv->sw_t > GAMEOVER_TIME || \
( gv->pduel && gv->key_FIRE2 ) )
{
SW_RESET;
Game_init_vars ( NEWGAME );
Game_init_keys ();
Game_actionfn = Game_menu;
}
}
/*================================================================*/
void Game_overlay ( void )
{
char buffer[256];
int i, x, x1, x2, y1, y2;
int life[6] = { 0, 25, 25, 25, 12, 0 };
Game_scores_draw ();
if ( gv->display_fps )
{
if ( gv->ftime > 0.0f )
{
sprintf ( buffer, "FPS:%3.0f:(%1.3f):ms(%ld)", gv->fps, \
gv->fadjust,gv->msec );
}
else
sprintf ( buffer, "FPS: n/a" );
Draw_text ( buffer, 0, 475, RED );
}
x1 = x2 = 0;
y1 = y2 = 425;
if ( gv->pduel )
{
if ( gv->phorizontal )
y1 -= 240;
else if ( gv->pvertical )
x2 += 320;
else
{
x2 += 320;
y1 -= 240;
}
if ( gv->plives2 > 1 )
{
for ( i = 0, x = 15+x2; i < (gv->plives2-1); i++ )
{
Draw_line ( life[0]+x, life[1]+y2, life[2]+x, life[3]+y2, GREEN );
Draw_line ( life[2]+x, life[3]+y2, life[4]+x, life[5]+y2, GREEN );
Draw_line ( life[4]+x, life[5]+y2, life[0]+x, life[1]+y2, GREEN );
x+= 30;
}
#ifdef GAME_DEBUG
sprintf ( buffer, "Lives: %d", gv->plives2-1 );
Draw_text ( buffer, x2+230, y2+45, GREEN );
#endif
}
}
if ( gv->plives1 > 1 )
{
for ( i = 0, x = 15; i < (gv->plives1-1); i++ )
{
Draw_line ( life[0]+x, life[1]+y1, life[2]+x, life[3]+y1, GREEN );
Draw_line ( life[2]+x, life[3]+y1, life[4]+x, life[5]+y1, GREEN );
Draw_line ( life[4]+x, life[5]+y1, life[0]+x, life[1]+y1, GREEN );
x+= 30;
}
#ifdef GAME_DEBUG
sprintf ( buffer, "Lives: %d", gv->plives1-1 );
Draw_text ( buffer, 550-x2, y1+45, GREEN );
#endif
}
#ifdef GAME_DEBUG
sprintf ( buffer, "Time: %10.0fs", (double)gv->sw_t/1000);
Draw_text ( buffer, 0, 470, RED );
if ( gv->pduel )
sprintf ( buffer, "U:%d D:%d L:%d R:%d F:%d - U:%d D:%d L:%d R:%d F:%d", \
gv->key_UP1, gv->key_DOWN1, gv->key_LEFT1, gv->key_RIGHT1, \
gv->key_FIRE1, gv->key_UP2, gv->key_DOWN2, gv->key_LEFT2, \
gv->key_RIGHT2, gv->key_FIRE2 );
else
sprintf ( buffer, "U: %d D: %d L: %d R: %d F: %d", \
gv->key_UP1, gv->key_DOWN1, gv->key_LEFT1, gv->key_RIGHT1, \
gv->key_FIRE1 );
Draw_text ( buffer, 200, 470, WHITE );
#endif
}
/*================================================================*/
void Game_run ( void )
{
float dist = 0.0f;
OBJECT *alien1, *alien2, *abomb;
VEC up1 = { 0.0f, 1.0f, 0.0f, 1.0f };
VEC from1 = { 0.0f, 25.0f, 100.0f, 1.0f };
VEC at1 = { 0.0f, 0.0f, -100.0f, 1.0f };
VEC up2 = { 0.0f, 1.0f, 0.0f, 1.0f };
VEC from2 = { 0.0f, 25.0f, 100.0f, 1.0f };
VEC at2 = { 0.0f, 0.0f, -100.0f, 1.0f };
MAT cam_mat1, cam_mat2;
int hit1, hit2;
/* prepare for new frame */
Clear_obj_list ();
/* update-player1 */
if ( player1->active )
player1->actionfn ( player1 );
/* update camera1 */
Vector_addd ( from1, player1->pos );
Vector_addd ( at1, player1->pos );
Camera_transform ( cam_mat1, up1, from1, at1, 0 );
if ( gv->pduel )
{
/* update-player2 */
if ( player2->active )
player2->actionfn ( player2 );
/* update camera2 */
Vector_addd ( from2, player2->pos );
Vector_addd ( at2, player2->pos );
Camera_transform ( cam_mat2, up2, from2, at2, 1 );
}
/* Do collisions checking : test player_missile(s) vs aliens */
hit1 = hit2 = 0;
if ( pm1->active && pm1->zone == gv->formation_zone && \
pm1->zheight > -1 && pm1->zheight < ZONE_HEIGHT_MAX )
{
hit1 = 1;
/* if so which height-level?? */
alien1 = (af_list+pm1->zheight)->head;
}
if ( gv->pduel && \
pm2->active && pm2->zone == gv->formation_zone && \
pm2->zheight > -1 && pm2->zheight < ZONE_HEIGHT_MAX )
{
hit2 = 1;
alien2 = (af_list+pm2->zheight)->head;
}
if ( hit1 && hit2 && alien1 == alien2 )
{
/*
* slim posibility that both players will hit the same aliens,
* so we need to check each player's missile vs each alien.
*/
while ( alien1 )
{
hit1 = hit2 = 0;
dist = Dist_pt_2_line ( alien1->pos, pm1->old_pos, pm1->pos ) - \
pm1->radius_squared - 1.0f;
if ( dist < alien1->radius_squared )
{
hit1 = 1;
pm1->active = FALSE;
Game_scores ( gv->pscore1 + score_table[pm1->zheight], 0 );
gv->pbonus1 += score_table[pm1->zheight];
if ( gv->pbonus1 > PLAYER_LIFE_BONUS-1 )
{
gv->pbonus1 -= PLAYER_LIFE_BONUS;
if ( gv->plives1 < PLAYER_LIFE_MAX )
{
gv->plives1++;
hit1 = 2;
}
}
}
dist = Dist_pt_2_line ( alien1->pos, pm2->old_pos, pm2->pos ) - \
pm2->radius_squared - 1.0f;
if ( dist < alien1->radius_squared )
{
hit2 = 1;
pm2->active = FALSE;
Game_scores ( gv->pscore2 + score_table[pm1->zheight], 1 );
gv->pbonus2 += score_table[pm1->zheight];
if ( gv->pbonus2 > PLAYER_LIFE_BONUS-1 )
{
gv->pbonus2 -= PLAYER_LIFE_BONUS;
if ( gv->plives2 < PLAYER_LIFE_MAX )
{
gv->plives2++;
hit2 = 2;
}
}
}
if ( hit1 || hit2 )
{
alien1->active = FALSE;
gv->alien_count--;
Objlist_del ( (af_list+pm1->zheight), alien1 );
Explosions_add ( alien1 );
Update_fcolumn ( alien1 );
/* update player score & alien count */
if ( ( hit1 > 1 ) || ( hit2 > 1 ) )
One_up_add ( alien1 );
if ( gv->alien_count == 0 )
{
gv->new_level = TRUE;
break;
}
}
alien1 = alien1->next;
}
hit1 = hit2 = 0;
}
if ( hit1 )
{
while ( alien1 )
{
dist = Dist_pt_2_line ( alien1->pos, pm1->old_pos, pm1->pos ) - \
pm1->radius_squared - 1.0f;
if ( dist < alien1->radius_squared )
{
pm1->active = alien1->active = FALSE;
gv->alien_count--;
Objlist_del ( (af_list+pm1->zheight), alien1 );
Explosions_add ( alien1 );
Update_fcolumn ( alien1 );
/* update player score & alien count */
Game_scores ( gv->pscore1 + score_table[pm1->zheight], 0 );
gv->pbonus1 += score_table[pm1->zheight];
if ( gv->pbonus1 > PLAYER_LIFE_BONUS-1 )
{
gv->pbonus1 -= PLAYER_LIFE_BONUS;
if ( gv->plives1 < PLAYER_LIFE_MAX )
{
gv->plives1++;
One_up_add ( alien1 );
}
}
if ( gv->alien_count == 0 )
gv->new_level = TRUE;
break;
}
alien1 = alien1->next;
}
}
if ( hit2 )
{
while ( alien2 )
{
dist = Dist_pt_2_line ( alien2->pos, pm2->old_pos, pm2->pos ) - \
pm2->radius_squared - 1.0f;
if ( dist < alien2->radius_squared )
{
pm2->active = alien2->active = FALSE;
gv->alien_count--;
Objlist_del ( (af_list+pm2->zheight), alien2 );
Explosions_add ( alien2 );
Update_fcolumn ( alien2 );
/* update player score & alien count */
Game_scores ( gv->pscore2 + score_table[pm2->zheight], 1 );
gv->pbonus2 += score_table[pm2->zheight];
if ( gv->pbonus2 > PLAYER_LIFE_BONUS-1 )
{
gv->pbonus2 -= PLAYER_LIFE_BONUS;
if ( gv->plives2 < PLAYER_LIFE_MAX )
{
gv->plives2++;
One_up_add ( alien2 );
}
}
if ( gv->alien_count == 0 )
gv->new_level = TRUE;
break;
}
alien2 = alien2->next;
}
}
/* is player missile(s) in the UFO zone?? */
if ( ufo->active )
{
/*
* allow for very slim possibility that both players hit UFO
* hit the UFO at the same time, therefore test for hit first,
* and then add the score(s) afterwards.
*/
hit1 = hit2 = 0;
if ( pm1->active && \
( pm1->zone == ufo->zone ) && ( pm1->zheight == ufo->zheight ) )
{
dist = Dist_pt_2_line ( ufo->pos, pm1->old_pos, pm1->pos ) - \
pm1->radius_squared - 1.0f;
if ( dist < ufo->radius_squared )
hit1 = 1;
}
if ( gv->pduel && pm2->active && \
( pm2->zone == ufo->zone ) && ( pm2->zheight == ufo->zheight ) )
{
dist = Dist_pt_2_line ( ufo->pos, pm2->old_pos, pm2->pos ) - \
pm2->radius_squared - 1.0f;
if ( dist < ufo->radius_squared )
hit2 = 1;
}
if ( hit1 )
{
pm1->active = ufo->active = FALSE;
Game_scores ( gv->pscore1 + UFO_BONUS, 0 );
gv->pbonus1 += UFO_BONUS;
if ( gv->pbonus1 > PLAYER_LIFE_BONUS-1 )
{
gv->pbonus1 -= PLAYER_LIFE_BONUS;
if ( gv->plives1 < PLAYER_LIFE_MAX )
gv->plives1++;
}
}
if ( hit2 )
{
pm2->active = ufo->active = FALSE;
Game_scores ( gv->pscore2 + UFO_BONUS, 1 );
gv->pbonus2 += UFO_BONUS;
if ( gv->pbonus2 > PLAYER_LIFE_BONUS-1 )
{
gv->pbonus2 -= PLAYER_LIFE_BONUS;
if ( gv->plives2 < PLAYER_LIFE_MAX )
gv->plives2++;
}
}
if ( hit1 || hit2 )
{
Explosions_add ( ufo );
if ( ( hit1 > 1 ) || ( hit2 > 1 ) )
One_up_add ( ufo );
}
}
/* alien bombs vs player(s) */
if ( !gv->gameover )
{
hit1 = hit2 = 0;
if ( player1->active && !gv->pblink1 )
hit1 = 1;
if ( gv->pduel && player2->active && !gv->pblink2 )
hit2 = 1;
if ( hit1 || hit2 )
{
for (abomb = abombs->head; abomb != NULL; abomb = abomb->next )
{
/* one bomb might hit one or both players */
if ( hit1 && \
abomb->zone == player1->zone && \
abomb->zheight == player1->zheight )
{
dist = Dist_pt_2_line ( player1->pos, abomb->old_pos, abomb->pos ) - \
abomb->radius_squared - 1.0f;
if ( dist < player1->radius_squared )
{
player1->active = FALSE;
Explosions_add ( player1 );
hit1 = 2;
}
}
if ( hit2 && \
abomb->zone == player2->zone && \
abomb->zheight == player2->zheight )
{
dist = Dist_pt_2_line ( player2->pos, abomb->old_pos, abomb->pos ) - \
abomb->radius_squared - 1.0f;
if ( dist < player2->radius_squared )
{
player2->active = FALSE;
Explosions_add ( player2 );
hit2 = 2;
}
}
if ( hit1 > 1 || hit2 > 1 )
{
abomb->active = FALSE;
Objlist_del ( abombs, abomb );
if ( hit1 > 1 )
hit1 = 0;
if ( hit2 > 1 )
hit2 = 0;
}
if ( !( hit1 || hit2 ) )
break;
}
}
}
/*
* player(s) vs aliens:
* if the remaining aliens reach the player_zone
* then the game is over! Reduce the number of
* remaining lives to zero and blowup the player(s) and
* then initiate a game-over!
*/
if ( gv->formation_zone == ZONE_0 )
{
gv->plives1 = gv->plives2 = 0;
if ( player1->active )
{
Explosions_add ( player1 );
player1->active = FALSE;
}
if ( gv->pduel && player2->active )
{
Explosions_add ( player2 );
player2->active = FALSE;
}
}
/*
*
* Move Objects and Update Animations :
* formation, alien_bombs, ufo, and player_missile
*
*/
Aliens_update ();
if ( pm1->active )
pm1->actionfn ( pm1 );
if ( ( gv->pduel ) && ( pm2->active ) )
pm2->actionfn ( pm2 );
/*
*
* Draw Objects :
*
* special effects
* alien: formation, bombs, and ufo
* player missile
* player
*
*/
Stars_draw ( cam_mat1, cam_mat2 );
Jumpgate_animate ( cam_mat1, cam_mat2 );
Explosions_draw ( cam_mat1, cam_mat2 );
One_up_draw ( cam_mat1, cam_mat2 );
/*
* major hack!! this is NOT the right way to draw in 3d
* may the universe forgive my transgression!
* ...but it's KISS and visually seems close enough :-P
* */
if ( ufo->active )
Add_obj_2_world ( ufo );
Add_obj_2_world ( &the_formation );
for (abomb=abombs->head; abomb != NULL; abomb=abomb->next )
{
Add_obj_2_world ( abomb );
}
if ( pm1->active )
Add_obj_2_world ( pm1 );
if ( player1->active )
Add_obj_2_world ( player1 );
if ( gv->pduel )
{
if ( pm2->active )
Add_obj_2_world ( pm2 );
if ( player2->active )
Add_obj_2_world ( player2 );
}
Sort_obj_list ();
Draw_obj_list ( cam_mat1, cam_mat2 );
SW_UPDATE;
Game_overlay ();
/*
* Before acknowledging flags make sure ALL explosions
* are finished:
* gameover flag has precedence over newlevel flag
* since it is possible for a player to have killed
* all the aliens but then get killed by an alien bomb
* resulting in both a newlevel and gameover condition!!
*/
if ( Explosions_count() == 0 )
{
hit1 = hit2 = 0;
if ( gv->pduel )
{
if ( player1->active == FALSE && \
player2->active == FALSE )
hit2 = 1;
}
else
{
if ( player1->active == FALSE )
hit1 = 1;
}
if ( hit2 )
{
/* reduce player life and check for gameover */
gv->plives1--;
gv->plives2--;
if ( gv->plives1 <= 0 || gv->plives2 <= 0 )
gv->gameover = TRUE;
Player_init ( 0 );
Player_init ( 1 );
SW_RESET;
Game_actionfn = Game_ready;
}
else if ( hit1 )
{
/* reduce player life and check for gameover */
gv->plives1--;
if ( gv->plives1 <= 0 )
gv->gameover = TRUE;
Player_init ( 0 );
SW_RESET;
Game_actionfn = Game_ready;
}
if ( gv->gameover )
{