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game.c
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game.c
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#include <gb/gb.h>
#include <gb/cgb.h>
#include <gb/rand.h>
#include "defines.h"
#include "game.h"
#include "fade.h"
#include "gamestate.h"
#include "cos.h"
#include "ram.h"
#include "highscore.h"
#include "sound.h"
#include "mmlgb/driver/music.h"
#include "pause.h"
#include "sgb_send_packet.h"
#include "set_data_rle.h"
#include "data/palettes/sprites.h"
#include "characters.h"
#include "data/bg/clock.h"
#include "data/sprite/sprites.h"
#include "data/sprite/portal.h"
#include "data/sprite/skin1.h"
#include "data/sprite/skin2.h"
#include "data/sprite/skin3.h"
UBYTE first_load;
UBYTE scrolled;
UBYTE last_spawn_x, last_spawn_index;
UBYTE progress, progressbar, portal_spawned, repeat_spikes;
UBYTE scrolled_length, allowed_spikes, clock_interval;
UBYTE blips, blip_bar;
UBYTE dashing, dashes, dash_xdir, dash_ydir;
UBYTE ghost_frame;
UBYTE *spawn_levels;
UBYTE wave_bg, special_wave;
extern UBYTE plains_song_data;
extern UBYTE clouds_song_data;
extern UBYTE space_song_data;
extern UBYTE dream_song_data;
extern UBYTE heaven_song_data;
extern UBYTE level_clear_song_data;
const UBYTE scrolled_length_data[5] = {
16U, // 16 * 111 / 36 = 49
24U, // 24 * 111 / 36 = 74
32U, // 32 * 111 / 36 = 98
40U, // 40 * 111 / 36 = 123
8U // 16 * 111 / 36 = 49
};
const UBYTE clock_interval_data[5] = {
8U, // 49/8 = 6.125
10U, // 74/12 = 7.4
11U, // 98/11 = 8.9
14U, // 123/14 = 8.85
255U
};
const UBYTE allowed_spikes_data[4] = { 1U, 1U, 1U, 3U };
const UBYTE spawn_level_data[96] = {
// Plains
E_BIRD, E_BIRD, E_BAT, E_BAT, E_BAT, E_BAT, E_BAT, E_BAT,
E_SPIKES, E_SPIKES, E_BIRD, E_BIRD, E_BAT, E_BAT, E_BAT, E_BAT,
E_SPIKES, E_SPIKES, E_SPIKES, E_BIRD, E_BIRD, E_BIRD, E_BAT, E_BAT,
// Clouds
E_SPIKES, E_SPIKES, E_SPIKES, E_BIRD, E_BIRD, E_BAT, E_BAT, E_BAT,
E_SPIKES, E_SPIKES, E_ALIEN, E_ALIEN, E_BIRD, E_BIRD, E_BAT, E_BAT,
E_FIREBALL, E_FIREBALL, E_ALIEN, E_ALIEN, E_BIRD, E_BIRD, E_BAT, E_BAT,
// Space
E_SPIKES, E_SPIKES, E_ALIEN, E_ALIEN, E_BIRD, E_BIRD, E_BAT, E_BAT,
E_FIREBALL, E_FIREBALL, E_GHOST, E_GHOST, E_GHOST, E_BIRD, E_BIRD, E_ALIEN,
E_FIREBALL, E_FIREBALL, E_FIREBALL, E_BIRD, E_GHOST, E_GHOST, E_GHOST, E_ALIEN,
// Dream
E_SPIKES, E_SPIKES, E_GHOST, E_GHOST, E_GHOST, E_ALIEN, E_BIRD, E_BIRD,
E_FIREBALL, E_FIREBALL, E_SPIKES, E_GHOST, E_GHOST, E_GHOST, E_BIRD, E_ALIEN,
E_FIREBALL, E_FIREBALL, E_SPIKES, E_ALIEN, E_GHOST, E_GHOST, E_BIRD, E_BIRD
};
const UBYTE spawn_level_heaven[32] = {
E_FIREBALL, E_SPIKES, E_GHOST, E_ALIEN, E_BIRD, E_BIRD, E_BAT, E_BAT,
E_FIREBALL, E_SPIKES, E_SPIKES, E_GHOST, E_ALIEN, E_BIRD, E_BIRD, E_BAT,
E_FIREBALL, E_FIREBALL, E_SPIKES, E_GHOST, E_GHOST, E_ALIEN, E_BIRD, E_BAT,
E_FIREBALL, E_FIREBALL, E_SPIKES, E_GHOST, E_GHOST, E_ALIEN, E_ALIEN, E_BIRD
};
const UBYTE spawn_level_squids[8] = { E_ALIEN, E_ALIEN, E_ALIEN, E_ALIEN, E_ALIEN, E_ALIEN, E_ALIEN, E_ALIEN };
const UBYTE spawn_level_ghosts[8] = { E_GHOST, E_GHOST, E_GHOST, E_GHOST, E_GHOST, E_GHOST, E_GHOST, E_GHOST };
const UBYTE spawn_level_spikedash[8] = { E_FIREBALL, E_FIREBALL, E_FIREBALL, E_FIREBALL, E_SPIKES, E_SPIKES, E_SPIKES, E_SPIKES };
const UBYTE spawn_level_doublespikes[8] = { E_SPIKES, E_SPIKES, E_SPIKES, E_SPIKES, E_BIRD, E_BIRD, E_BIRD, E_BIRD };
#define PROGRESS_POS(x) mydiv(((x) << 1U), 3U)
const UBYTE wave_text[4] = { 33U, 11U, 32U, 15U };
const UWORD clock_palettes[4] = {
32767UL, 18668UL, 18668UL, 0UL
};
const UBYTE entity_sprites[10] = {
0, // E_NONE
// Hazards
(9U << 2), // E_SPIKES
(19U << 2), // E_FIREBALL
// Enemies
(17U << 2), // E_ALIEN
(13U << 2), // E_BAT
(11U << 2), // E_BIRD
(15U << 2), // E_GHOST
// Powerups
(21U << 2), // E_CLOCK
// Special
(29U << 2), // E_PORTAL
(27U << 2) // E_CLOUD
};
const UBYTE entity_palettes[10U] = {
0U, // none
2U, // spikes
2U, // fireball
4U, // alien
3U, // bat
2U, // bird
3U, // ghost
0U // clock
};
const UBYTE SGB_GAME_STAGE_PAL01[16] = {
1, 255, 127, 92, 57, 203, 72, 0, 0, 59, 29, 233, 113, 0, 0, 0
};
const UBYTE SGB_GAME_HEAVEN_PAL01[16] = {
1, 255, 127, 28, 49, 20, 123, 0, 0, 59, 29, 233, 113, 0, 0, 0
};
const UBYTE SGB_GAME_WAVE_PAL01[16] = {
1, 255, 127, 181, 86, 74, 41, 0, 0, 181, 86, 74, 41, 0, 0, 0
};
const UBYTE SGB_GAME_ATTRDIV[16] = {
(6U << 3) + 1U,
1U | (1U << 4),
18U,
0U,
0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U
};
const UBYTE SGB_GAME_WAVE_ATTRDIV[16] = {
(6U << 3) + 1U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U
};
const UWORD wavescreen_palette_data[] = {
32767, 0, 0, 0
};
const UBYTE retry_text[19] = {
33U, 11U, 32U, 15U, 29U, // waves
12U, 15U, 29U, 30U, // best
28U, 15U, 30U, 28U, 35U, // retry
35U, 15U, 29U, // yes
24U, 25U // no
};
const UBYTE special_text[7] = {
29U, 26U, 15U, 13U, 19U, 11U, 22U
};
#define RETRY_NUM_CHARS 26U
const UBYTE retry_text_data[RETRY_NUM_CHARS * 4] = {
// waves
8U, 44U, 33U, OBJ_PAL0,
8U, 52U, 11U, OBJ_PAL0,
8U, 60U, 32U, OBJ_PAL0,
8U, 68U, 15U, OBJ_PAL0,
// best
16U, 44U, 12U, OBJ_PAL0,
16U, 52U, 15U, OBJ_PAL0,
16U, 60U, 29U, OBJ_PAL0,
16U, 68U, 30U, OBJ_PAL0,
// retry
32U, 60U, 28U, OBJ_PAL0,
32U, 68U, 15U, OBJ_PAL0,
32U, 76U, 30U, OBJ_PAL0,
32U, 84U, 28U, OBJ_PAL0,
32U, 92U, 35U, OBJ_PAL0,
// yes
40U, 72U, 35U, OBJ_PAL0,
40U, 80U, 15U, OBJ_PAL0,
40U, 88U, 29U, OBJ_PAL0,
// no
48U, 72U, 24U, OBJ_PAL0,
48U, 80U, 25U, OBJ_PAL0,
// wave count
8U, 92U, 10U, OBJ_PAL0,
8U, 100U, 10U, OBJ_PAL0,
8U, 108U, 10U, OBJ_PAL0,
// best count
16U, 92U, 10U, OBJ_PAL0,
16U, 100U, 10U, OBJ_PAL0,
16U, 108U, 0U, OBJ_PAL0,
// marker
41U, 58U, 100U, OBJ_PAL0,
48U, 66U, 100U, OBJ_PAL0 | FLIP_X
};
const UBYTE restart_window_tiles[9] = { 3U, 3U, 18U, 255U, 255U, 108U, 5U, 5U, 18U };
const UBYTE heaven_wave_effects[8] = {
0U,
WAVE_SPC_SQUIDS,
WAVE_SPC_AUTOSCROLL,
WAVE_SPC_SPIKEDASH,
WAVE_SPC_GHOSTS,
WAVE_SPC_LOWTIME,
WAVE_SPC_DOUBLESPIKES,
WAVE_SPC_AUTOSCROLL | WAVE_SPC_SPIKEDASH
};
UBYTE *getSkinData() {
switch(player_skin) {
case 2: return skin2_data;
case 3: return skin3_data;
default: return skin1_data;
}
}
void initGame() {
disable_interrupts();
DISPLAY_OFF;
mus_setPaused(1U);
// Init variables
timer = 0U;
ticks = 0U;
next_spawn = 0U;
progress = 0U;
progressbar = 120U;
portal_spawned = 0U;
repeat_spikes = 0U;
ghost_frame = 0U;
next_entity = 0U;
if(special_wave & WAVE_SPC_LOWTIME) {
remaining_time = LOW_TIME+1U;
} else {
remaining_time = MAX_TIME;
}
scene_state = INGAME_ACTIVE;
if(first_load) {
last_progress = 0U;
}
player_x = 88U;
player_y = SCRLMGN;
player_xdir = RIGHT;
player_ydir = DOWN;
player_yspeed = 0U;
player_bounce = 0U;
blip_bar = 0U;
dashing = 0U;
dashes = MAX_DASHES;
dash_xdir = 0U;
dash_ydir = 0U;
paused = 0U;
scrolled = 0U;
scroll_y = 0U;
clock_interval = clock_interval_data[level-1U];
if (level == 5U) {
generateSpawnData();
wave_bg = wave - mydiv(wave+1U, 5U);
} else {
spawn_levels = (UBYTE*)&spawn_level_data[(level-1U) * 24];
scrolled_length = scrolled_length_data[level-1U];
allowed_spikes = allowed_spikes_data[level-1U];
}
if(level != 5U || wave == 0U) {
// don't reset boost, time and stomps when progressing in level 5
blips = MAX_BOOST;
elapsed_time = 0UL;
kills = 0UL;
}
next_clock = clock_interval;
restoreGame(first_load, 0U);
set_sprite_data(4U, portal_data_length, portal_data);
clearSprites();
clearEntities();
move_bkg(0U, 112U);
move_win(151U, 0U);
initSpawns();
DISPLAY_ON;
enable_interrupts();
}
void restoreGame(UBYTE update, UBYTE from_pause) {
if(sgb_mode) {
if(level == 5U) {
sgb_send_packet(SGB_GAME_HEAVEN_PAL01);
} else {
sgb_send_packet(SGB_GAME_STAGE_PAL01);
}
delay(62U);
sgb_send_packet(SGB_GAME_ATTRDIV);
}
memcpy((UBYTE*)0x8000UL, getSkinData(), 384U);
memcpy((UBYTE*)0x8180UL, sprites_data, sprites_data_length*16);
set_sprite_palette(0U, sprites_palette_data_length, sprites_palette_data);
setIngameBackground(special_wave ? 255U : level+wave_bg, update, !from_pause);
setIngameHUD(update, !from_pause);
if(update) {
set_bkg_data_rle(clock_tiles_offset, clock_data_length, clock_data);
}
if(CGB_MODE) {
set_bkg_palette_buffer(7U, 1U, clock_palettes);
}
updateHUDTime();
SPRITES_8x16;
SHOW_BKG;
SHOW_WIN;
SHOW_SPRITES;
OBP0_REG = 0xD0U; // 11010000
OBP1_REG = 0x40U; // 01010000
BGP_REG = 0xE4U; // 11100100
move_bkg(0U, 112U-progress);
}
void updateInput() {
updateJoystate();
if(!dashing) {
if(ISDOWN(J_LEFT)) {
player_x -= MOVE_SPEED;
player_xdir = LEFT;
}
else if(ISDOWN(J_RIGHT)) {
player_x += MOVE_SPEED;
player_xdir = RIGHT;
}
}
if(CLICKED(KEY_DASH)) {
if(dashes) {
dash_xdir = dash_ydir = NONE;
if(ISDOWN(J_LEFT)) dash_xdir = LEFT;
else if(ISDOWN(J_RIGHT)) dash_xdir = RIGHT;
if(ISDOWN(J_UP)) dash_ydir = UP;
else if(ISDOWN(J_DOWN)) dash_ydir = DOWN;
if(dash_xdir || dash_ydir) {
dashing = DASH_TIME;
if(!(special_wave & WAVE_SPC_SPIKEDASH)) dashes--;
spawnEntity(E_CLOUD, player_x, player_y-6U, 0U);
playSound(SFX_DASH);
}
}
}
}
void updatePlayer() {
UBYTE i, diff;
UBYTE frame, palette, type;
// Check entity collisions
for(i = 0U; i != MAX_ENTITIES; ++i) {
type = entity_type[i];
if(type && type <= LAST_COLLIDABLE
&& (player_y - entity_y[i] + 11U) <= 22U
&& (player_x - entity_x[i] + 11U) <= 22U) {
// Spikes and fireballs
if(type <= E_FIREBALL) {
killPlayer();
// Enemies
} else if(type <= LAST_ENEMY) {
if(player_ydir == DOWN && player_y <= entity_y[i]+1U) {
if(dashing && dash_ydir == DOWN) {
entity_type[i] = E_NONE;
spawnEntity(E_CLOUD, player_x, player_y+5U, 0U);
blips += STOMP_BONUS;
if(blips > MAX_BOOST) blips = MAX_BOOST;
kills++;
playSound(type+SFX_STOMP_ALIEN-E_ALIEN);
bouncePlayer(i, BUMP_SPEED);
}
else if(type == E_GHOST) {
entity_type[i] = E_NONE;
spawnEntity(E_CLOUD, player_x, player_y+5U, 0U);
playSound(SFX_STOMP_GHOST);
bouncePlayer(i, BUMP_SPEED);
}
else if(type == E_ALIEN) {
playSound(SFX_BUMP_ALIEN);
bouncePlayer(i, ALIEN_BUMP_SPEED);
}
else {
playSound(SFX_BUMP);
bouncePlayer(i, BUMP_SPEED);
}
} else {
if(player_x <= entity_x[i]) diff = entity_x[i] - player_x;
else diff = player_x - entity_x[i];
if(player_y <= entity_y[i]) diff += entity_y[i] - player_y;
else diff += player_y - entity_y[i];
if(diff <= 9U) killPlayer();
}
// Clock pickup
} else if(type == E_CLOCK) {
entity_type[i] = E_NONE;
if(special_wave & WAVE_SPC_LOWTIME) {
remaining_time += CLOCK_BONUS_LOWTIME;
} else {
remaining_time += CLOCK_BONUS;
}
if(remaining_time > MAX_TIME) remaining_time = MAX_TIME;
updateHUDTime();
playSound(SFX_TIME_PICKUP);
// End level portal
} else if(type == E_PORTAL) {
scene_state = INGAME_COMPLETED;
player_x = entity_x[i];
player_y = entity_y[i];
return;
}
}
}
// Dashing
if(dashing) {
dashing--;
player_yspeed = 0U;
player_ydir = DOWN;
if(dash_xdir == LEFT) {
player_x -= DASH_SPEED;
}
else if(dash_xdir == RIGHT) {
player_x += DASH_SPEED;
}
if(dash_ydir == UP) {
player_y -= DASH_SPEED-1U;
player_yspeed = 7U;
player_ydir = UP;
}
else if(dash_ydir == DOWN) {
player_y += DASH_SPEED;
}
if(!ISDOWN(KEY_DASH)) {
if(DASH_TIME - dashing >= 7U) {
dashing = 0U;
}
}
}
// Using boost
else if(ISDOWN(KEY_USE) && blips) {
blips--;
if(player_ydir == UP && player_yspeed <= MAX_FLY_SPEED) {
player_yspeed += 2U;
}
else {
if(player_yspeed <= 2U) {
player_yspeed = 2U;
player_ydir = UP;
} else {
player_yspeed -= 2U;
}
}
if((ticks & 15U) == 15U) {
playSound(SFX_JETPACK);
spawnEntity(E_CLOUD, player_x, player_y+5U, 0U);
}
}
// Flying UP
if(player_ydir == UP) {
player_yspeed--;
if(player_yspeed == 0U) {
player_ydir = DOWN;
}
player_y -= mydiv(player_yspeed, 7U);
}
// Flying DOWN
else {
player_yspeed++;
player_y += mydiv(player_yspeed, 7U);
if(player_yspeed > MAX_YSPEED) {
player_yspeed = MAX_YSPEED;
}
}
// Left and right borders
if(player_x <= 22U) player_x = 23U;
else if(player_x >= 154U) player_x = 153U;
// Don't underflow in auto scroll level
if(player_y <= 11U) player_y = 12U;
// Check bounds
if(player_y > SCREENHEIGHT+5U) {
player_y = SCREENHEIGHT;
killPlayer();
}
// Update sprite
frame = 0U;
if(player_bounce) {
frame = 8U;
player_bounce--;
}
else if(player_ydir == DOWN) {
frame = 4;
}
if(dashing) {
frame = 20U;
}
else if(ISDOWN(KEY_USE) && blips) {
if(ticks & 8U) frame = 12U;
else frame = 16U;
}
// Blink
palette = OBJ_PAL0;
if(!dashes && (ticks & 4U)) palette = OBJ_PAL1 | 7U;
// Dash marker
if(special_wave & WAVE_SPC_SPIKEDASH) {
setSprite(player_x-12U, player_y-9U, 94U, 5U | ((ticks & 8U) >> 2));
}
else if(show_dashcounter) {
setSprite(player_x-12U, player_y-9U, 24U+(dashes << 1), palette | 5U);
}
if(player_xdir == LEFT) {
setSprite(player_x-16U, player_y, frame, palette);
setSprite(player_x-8U, player_y, frame+2U, palette);
} else {
setSprite(player_x-8U, player_y, frame, FLIP_X | palette);
setSprite(player_x-16U, player_y, frame+2U, FLIP_X | palette);
}
// Update scroll
if(special_wave & WAVE_SPC_AUTOSCROLL) {
scroll_y = ticks & 1U;
player_y += scroll_y;
} else {
scroll_y = 0U;
if(player_y < SCRLMGN) {
scroll_y = SCRLMGN - player_y;
player_y = SCRLMGN;
}
}
}
void updateHUD() {
UBYTE frame;
if(blip_bar > blips) {
blip_bar = blips;
} else if(blip_bar < blips) {
blip_bar += 2U;
}
// Blips
setSprite(168U-(blip_bar >> 3), 136U, 96U, OBJ_PAL0 | 5U);
setSprite(176U-(blip_bar >> 3), 136U, 98U, OBJ_PAL0 | 5U);
// Progress bar
frame = 98U + (player_skin << 1U);
setSprite(153U, progressbar, frame, OBJ_PAL0);
setSprite(160U, progressbar, frame, OBJ_PAL0 | FLIP_X);
// Set last progress flag
if(last_progress) {
setSprite(153U, 119U - last_progress, 92U, OBJ_PAL0 | 5U);
}
// Low on time marker
if(remaining_time <= LOW_TIME && ticks & 16U) {
setSprite(136U, 24U, 32U, OBJ_PAL0 | 5U);
setSprite(144U, 24U, 34U, OBJ_PAL0 | 5U);
}
}
void updateHUDTime() {
UBYTE index;
index = (remaining_time >> 2) << 2;
disable_interrupts();
set_win_tiles(0U, 1U, 2U, 2U, &clock_tiles[index]);
enable_interrupts();
}
void bouncePlayer(UBYTE entity, UBYTE str) {
player_ydir = UP;
player_bounce = 16U;
dashes = MAX_DASHES;
dashing = 0;
player_y = entity_y[entity]-12U;
player_yspeed = str;
}
void updateEntities() {
UBYTE i, x, y, frame, pal, ghost_move;
// Update last spawn position with last spawned
// enemy if it still exists
if(last_spawn_index != NO_LAST_SPAWN) {
if(entity_type[last_spawn_index] != E_NONE) {
last_spawn_x = entity_x[last_spawn_index]-24U;
} else {
last_spawn_index = NO_LAST_SPAWN;
}
}
ghost_move = 0U;
if(!(ticks & 1U) && !scene_state) {
ghost_frame++;
ghost_move = cos16_32_diff[ghost_frame & 31U];
}
for(i = 0U; i != MAX_ENTITIES; ++i) {
if(!entity_type[i]) continue;
x = entity_x[i];
y = entity_y[i];
// Scroll entitites
y += scroll_y;
if(y >= SCREENHEIGHT+17U) {
entity_type[i] = E_NONE;
continue;
}
// Update entity
switch(entity_type[i]) {
case E_NONE: break;
case E_SPIKES: break;
case E_FIREBALL:
if(!(ticks & 1U) && !scene_state) {
if(entity_dir[i] == RIGHT) {
x++;
if(x >= 152U) entity_dir[i] = LEFT;
}
else {
x--;
if(x <= 24U) entity_dir[i] = RIGHT;
}
}
break;
case E_ALIEN: break;
case E_BAT: break;
case E_BIRD:
if(ticks & 1U && !scene_state) {
if(entity_dir[i] == RIGHT) {
x++;
if(x >= 152U) entity_dir[i] = LEFT;
}
else {
x--;
if(x <= 24U) entity_dir[i] = RIGHT;
}
}
break;
case E_GHOST:
x += ghost_move;
if(ghost_frame & 16U) entity_dir[i] = LEFT;
else entity_dir[i] = RIGHT;
break;
case E_CLOCK: break;
case E_PORTAL:
if((ticks & 15U) == 15U) entity_dir[i]++;
break;
case E_CLOUD:
if((ticks & 3U) == 3U) entity_dir[i]++;
if(entity_dir[i] == 4U) {
entity_type[i] = E_NONE;
y = 0U;
continue;
}
break;
}
// Draw entities on screen
frame = entity_sprites[entity_type[i]];
entity_x[i] = x;
entity_y[i] = y;
switch(entity_type[i]) {
case E_CLOUD:
frame += entity_dir[i] << 1U;
setSprite(x-16U, y, frame, OBJ_PAL0 | 3U);
setSprite(x-8U, y, frame, OBJ_PAL0 | FLIP_X | 3U);
break;
case E_PORTAL:
if(level == 3U && player_skin == 1U) {
setSprite(x-16U, y-24U, 120U, OBJ_PAL0 | 1U);
setSprite(x-8U, y-24U, 122U, OBJ_PAL0 | 1U);
setSprite(x-16U, y-8U, 124U, OBJ_PAL0 | 1U);
setSprite(x-8U, y-8U, 126U, OBJ_PAL0 | 1U);
} else {
if(entity_dir[i] & 1U) {
setSprite(x-16U, y, frame, OBJ_PAL0 | 6U);
setSprite(x-8U, y, frame+2U, OBJ_PAL0 | 6U);
} else {
setSprite(x-8U, y, frame, OBJ_PAL0 | FLIP_X | 6U);
setSprite(x-16U, y, frame+2U, OBJ_PAL0 | FLIP_X | 6U);
}
}
break;
default:
frame += ((ticks & 8U) >> 1);
pal = OBJ_PAL0 | entity_palettes[entity_type[i]];
if(entity_dir[i] == LEFT) {
setSprite(x-16U, y, frame, pal);
setSprite(x-8U, y, frame+2U, pal);
} else {
setSprite(x-8U, y, frame, pal | FLIP_X);
setSprite(x-16U, y, frame+2U, pal | FLIP_X);
}
break;
}
}
}
UBYTE spawnEntity(UBYTE type, UBYTE x, UBYTE y, UBYTE dir) {
UBYTE i;
for(i = 0U; i != MAX_ENTITIES; ++i) {
if(entity_type[next_entity] == E_NONE) break;
++next_entity;
if(next_entity == MAX_ENTITIES) next_entity = 0U;
}
if(i == MAX_ENTITIES) return NO_LAST_SPAWN;
entity_x[next_entity] = x;
entity_y[next_entity] = y;
entity_type[next_entity] = type;
entity_dir[next_entity] = dir;
return next_entity;
}
void initSpawns() {
UBYTE i, y, type;
if(special_wave & WAVE_SPC_SQUIDS) {
type = E_ALIEN;
} else {
type = E_BAT;
}
last_spawn_x = 64U;
y = 112U;
spawnEntity(type, last_spawn_x+24U, y, NONE);
if(special_wave & WAVE_SPC_GHOSTS) {
type = E_GHOST;
} else if(special_wave & WAVE_SPC_SPIKEDASH) {
type = E_SPIKES;
}
i = 0U;
if(special_wave & WAVE_SPC_DOUBLESPIKES) {
y -= 36U;
spawnEntity(E_SPIKES, 56U, y, NONE);
spawnEntity(E_SPIKES, 120U, y, NONE);
i++;
}
for(i = 0U; i != 3U; ++i) {
last_spawn_x = (last_spawn_x + 32U + (rand() & 63U)) & 127U;
y -= 36U;
last_spawn_index = spawnEntity(type, last_spawn_x + 24U, y, RIGHT);
}
}
void generateSpawnData() {
UBYTE tmp;
if(wave >= 256U) tmp = 255U;
else tmp = wave;
scrolled_length = 8U + mydiv(tmp, 3U);
if(scrolled_length >= 29U) scrolled_length = 28U;
allowed_spikes = 1U + mydiv(tmp, 12U);
if(allowed_spikes >= 4U) allowed_spikes = 3U;
if(special_wave & WAVE_SPC_LOWTIME) {
clock_interval = 5U;
}
if((special_wave & (WAVE_SPC_AUTOSCROLL | WAVE_SPC_SPIKEDASH)) == (WAVE_SPC_AUTOSCROLL | WAVE_SPC_SPIKEDASH)) {
spawn_levels = spawn_level_spikedash;
allowed_spikes = 255U;
scrolled_length = 10U;
clock_interval = 8U;
}
else if(special_wave & WAVE_SPC_AUTOSCROLL) {
spawn_levels = spawn_level_data + 32U;
scrolled_length = 10U;
clock_interval = 8U;
}
else if(special_wave & WAVE_SPC_SQUIDS) {
spawn_levels = spawn_level_squids;
}
else if(special_wave & WAVE_SPC_GHOSTS) {
spawn_levels = spawn_level_ghosts;
}
else if(special_wave == WAVE_SPC_SPIKEDASH) {
spawn_levels = spawn_level_spikedash;
allowed_spikes = 255U;
scrolled_length = 10U;
}
else if(special_wave == WAVE_SPC_DOUBLESPIKES) {
spawn_levels = spawn_level_doublespikes;
allowed_spikes = 1U;
}
else if(tmp == 0U) {
spawn_levels = spawn_level_data + 8U;
}
else if(tmp == 1U) {
spawn_levels = spawn_level_data + 48U;
} else {
if(tmp >= 25U) tmp = 24U;
spawn_levels = spawn_level_heaven + ((tmp >> 3) << 3);
}
}
void updateSpawns() {
UBYTE x, dice, type, step;
next_spawn += scroll_y;
if(next_spawn < SPAWN_INTERVAL) return;
if(progress <= 110U) {
next_spawn -= SPAWN_INTERVAL;
x = ((last_spawn_x + 32U + (rand() & 63U)) & 127U) + 24U;
step = 0U;
if(level != 5U) {
step = mydiv(progress, 39U); // TODO: Optimize?
}
dice = rand() & 7U;
while(dice != 8U) {
type = spawn_levels[(step << 3) + dice];
switch(type) {
case E_FIREBALL:
if(repeat_spikes < allowed_spikes) {
last_spawn_index = spawnEntity(E_FIREBALL, x, 1U, 2U + ((rand() & 1U) << 1));
repeat_spikes++;
dice = 8U;
break;
}
dice++;
break;
case E_SPIKES:
if(repeat_spikes < allowed_spikes) {
last_spawn_index = spawnEntity(E_SPIKES, x, 1U, NONE);
if(special_wave & WAVE_SPC_DOUBLESPIKES) {
x = ((x + 48U + (rand() & 31U)) & 127U) + 24U;
spawnEntity(E_SPIKES, x, 1U, NONE);
}
repeat_spikes++;
dice = 8U;
break;
}
dice++;
break;
case E_GHOST:
if(x <= 39U) x = 40U;
if(x >= 137U) x = 136U;
last_spawn_index = spawnEntity(E_GHOST, x, 1U, NONE);
repeat_spikes = 0U;
dice = 8U;
break;
case E_ALIEN:
if(x <= 39U) x = 40U;
if(x >= 137U) x = 136U;
last_spawn_index = spawnEntity(E_ALIEN, x, 1U, LEFT);
repeat_spikes = 0U;
dice = 8U;
break;
case E_BIRD:
if(x <= last_spawn_x) {
last_spawn_index = spawnEntity(E_BIRD, x, 1U, LEFT);
} else {
last_spawn_index = spawnEntity(E_BIRD, x, 1U, RIGHT);
}
repeat_spikes = 0U;
dice = 8U;
break;
case E_BAT:
last_spawn_index = spawnEntity(E_BAT, x, 1U, NONE);
repeat_spikes = 0U;
dice = 8U;
break;
}
}
last_spawn_x = x - 24U;
next_clock--;
if(!next_clock) {
next_clock = clock_interval;
x = ((last_spawn_x + 32U + (rand() & 63U)) & 127U) + 24U;
spawnEntity(E_CLOCK, x, 1U, NONE);
}
}
else if(progress == 112U && !portal_spawned && next_spawn >= 56U) {
spawnEntity(E_PORTAL, 88U, 1U, NONE);
next_spawn = 0U;
portal_spawned = 1U;
}
}
void introAnimation() {
UBYTE frame;
playSound(SFX_WARP_START);
for(ticks = 0U; ticks != 64U; ++ticks) {
frame = 20U - ((ticks >> 4) << 2);
if(ticks & 8U) {
setSprite(player_x-16U, player_y, frame, OBJ_PAL0 | 6U);
setSprite(player_x-8U, player_y, frame+2U, OBJ_PAL0 | 6U);
} else {
setSprite(player_x-8U, player_y, frame, FLIP_X | OBJ_PAL0 | 6U);
setSprite(player_x-16U, player_y, frame+2U, FLIP_X | OBJ_PAL0 | 6U);
}
updateEntities();
updateHUD();
clearRemainingSprites();
snd_update();
wait_vbl_done();
}
for(ticks = 0U; ticks != 16U; ++ticks) {
setSprite(player_x-8U, player_y, 0U, FLIP_X | OBJ_PAL0);
setSprite(player_x-16U, player_y, 2U, FLIP_X | OBJ_PAL0);
updateEntities();
updateHUD();
clearRemainingSprites();
snd_update();
wait_vbl_done();
}
stop_sound();
disable_interrupts();
set_sprite_data(0U, 24U, getSkinData());
set_sprite_data(24U, 4U, sprites_data);
enable_interrupts();
}
void intoPortalAnimation() {
UBYTE frame;
disable_interrupts();
set_sprite_data(0U, portal_data_length, portal_data);
enable_interrupts();
playSound(SFX_WARP_START);
for(ticks = 0U; ticks != 18U; ++ticks) {
setSprite(player_x-16U, player_y, entity_sprites[E_PORTAL], OBJ_PAL0 | 6U);
setSprite(player_x-8U, player_y, entity_sprites[E_PORTAL]+2U, OBJ_PAL0 | 6U);