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battlecity-md/collision.c

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#include "genesis.h"
#include "collision.h"
#include "map.h"
#include "gamelogic.h"
#include "resmap.h"
#include "defs.h"
#include "resources.h"
//#include "audio.h"
void tileReaction(_bullet* bull, s16* after_hit, u8* kill_bull, s16* x0, s16* y0, u8 xShift, u8 yShift);
u8 moveAvailableInUnits(_tank *tank) {
u16 i = config.units_on_map;
_tank *buff;
u16 x = tank->posx;
u16 y = tank->posy;
s16 delta_x;
s16 delta_y;
while (i--) {
buff = &game_player[i];
if (tank == buff)continue;
if (!buff->hitpoint)continue;
delta_x = x - buff->posx;
delta_y = y - buff->posy;
if (delta_x < 0)delta_x = -delta_x;
if (delta_y < 0)delta_y = -delta_y;
if (delta_x < 16 && delta_y < 16)return delta_x + delta_y;
}
return 32;
}
void detectBulletToWallCollision(_bullet *bull) {
u16 tile_idx = 0;
s16 x = bull->posx;
s16 y = bull->posy;
x += speed_x[bull->rotate] << 1;
y += speed_y[bull->rotate] << 1;
s16 x0 = x >> 3;
s16 y0 = y >> 3;
s16 after_hit;
s16 mod = (((x | y) & 7) - 1) >> 2;
u8 kill_bull = 0;
u16 rotate = bull->rotate;
if (bull->speed == 0) return;
if (x0 < 0 || x0 >= MAP_W - 1 || y0 < 0 || y0 >= MAP_H - 1) {
if (mods.bul_ricochet && (!bull->ricocheted)) {
bull->ricocheted = TRUE;
u8 rot = bull->rotate + 2;
// u8 rot = (random() % 3);
// rot %= 3;
// if (rot == bull->rotate) GLog_killBullet(bull, 1);
bull->rotate = rot;
if (bull->rotate > 3) bull->rotate = bull->rotate - 4;
}
else {
GLog_killBullet(bull, 1);
if (bull->maker == &game_player[0] || bull->maker == &game_player[1]) soundPlay(snd_bull_stop, sizeof (snd_bull_stop), SOUND_PCM_CH3, 0);
// return;
}
return;
}
tile_idx = mapGetTile(x0, y0);
after_hit = tileAfterHit(tile_idx, rotate, mod);
if (after_hit >= 0) {
tileReaction(bull, &after_hit, &kill_bull, &x0, &y0, 0, 0);
}
if ((rotate & 1)) {
tile_idx = mapGetTile(x0, y0 + 1);
after_hit = tileAfterHit(tile_idx, rotate, mod);
if (after_hit >= 0) {
tileReaction(bull, &after_hit, &kill_bull, &x0, &y0, 0, 1);
}
}
else {
tile_idx = mapGetTile(x0 + 1, y0);
after_hit = tileAfterHit(tile_idx, rotate, mod);
if (after_hit >= 0) {
tileReaction(bull, &after_hit, &kill_bull, &x0, &y0, 1, 0);
}
}
if (kill_bull) {
GLog_killBullet(bull, 1);
if (bull->maker == &game_player[0] || bull->maker == &game_player[1]) {
if (after_hit == 16) {
// startPlaySample(snd_bull_stop, sizeof (snd_bull_stop), 11000, AUDIO_PAN_CENTER, 6);
soundPlay(snd_bull_stop, sizeof (snd_bull_stop), SOUND_PCM_CH3, 0);
} else {
// startPlaySample(snd_bull_stop_briks, sizeof (snd_bull_stop_briks), 11000, AUDIO_PAN_CENTER, 3);
soundPlay(snd_brick_hit, sizeof (snd_brick_hit), SOUND_PCM_CH3, 0);
}
}
}
}
s16 tileAfterHit(u16 tile_idx, u16 bullet_rotate, u16 dip) {
u16 mask;
if (tile_idx == RES_TILE_ARMOR) return tile_idx;
if (tile_idx == (RES_TILE_GRASS | TILE_ATTR(0, 1, 0, 0))) {
return RES_TILE_GRASS;
}
else {
if (tile_idx > 16 || tile_idx == 0) return -1;
}
if (bullet_rotate & 1) {
mask = 10 >> dip;
} else {
mask = 12 >> (dip << 1);
}
if ((tile_idx & mask) == tile_idx) return -1;
return tile_idx & mask;
}
void tileReaction(_bullet* bull, s16* after_hit, u8* kill_bull, s16* x0, s16* y0, u8 xShift, u8 yShift) {
switch (*after_hit) {
case RES_TILE_GRASS:
if (bull->maker->uranium_bullets && bull->maker->grass_trim) {
*after_hit = 0;
mapSetTile(0, *x0 + xShift, *y0 + yShift);
}
break;
case RES_TILE_ARMOR:
if (mods.bul_ricochet) {
if (!bull->ricocheted) {
bull->ricocheted = TRUE;
bull->rotate += 2;
if (bull->rotate > 3) bull->rotate = bull->rotate - 4;
}
else if (bull->ricocheted && !xShift && !yShift) {
*kill_bull = 1;
}
}
else {
if (bull->maker->uranium_bullets) {
*after_hit = 0;
}
*kill_bull = 1;
}
mapSetTile(*after_hit, *x0 + xShift, *y0 + yShift);
break;
default:
mapSetTile(*after_hit, *x0 + xShift, *y0 + yShift);
*kill_bull = 1;
break;
}
}
u8 moveAvailableInWalls(_tank *tank) {
u16 r = tank->rotate;
s16 x1 = tank->posx + speed_x[r];
s16 y1 = tank->posy + speed_y[r];
s16 x2 = (x1 + 15) >> 3;
s16 y2 = (y1 + 15) >> 3;
x1 >>= 3;
y1 >>= 3;
if (x1 < 0 || x1 >= MAP_W - 1 || y1 < 0 || y1 >= MAP_H - 1) return 0;
u16 tile_idx = 0;
tile_idx = mapGetTile(x1, y1);
if (tile_idx == RES_TILE_DIRT && tank->speed == 0) {
tank->on_dirt = TRUE;
}
else {
tank->on_dirt = FALSE;
}
if (tile_idx == RES_TILE_DIRT && tank->speed) {
tank->dirt = 32;
}
else if (tile_idx != RES_TILE_DIRT) {
tank->dirt = 0;
}
int i1 = 0;
int i2 = 0;
int i3 = 0;
int i4 = 0;
//, i2, i3, i4;
tile_idx &= 0x1FF;
if (tile_idx == 0 || tile_idx == 35 || tile_idx == 34 || tile_idx == 33 || (tank->ship == 1 && tile_idx == 18))i1 = 1;
tile_idx = mapGetTile(x2, y1);
tile_idx &= 0x1FF;
if (tile_idx == 0 || tile_idx == 35 || tile_idx == 34 || tile_idx == 33 || (tank->ship == 1 && tile_idx == 18))i2 = 1;
tile_idx = mapGetTile(x1, y2);
tile_idx &= 0x1FF;
if (tile_idx == 0 || tile_idx == 35 || tile_idx == 34 || tile_idx == 33 || (tank->ship == 1 && tile_idx == 18))i3 = 1;
tile_idx = mapGetTile(x2, y2);
tile_idx &= 0x1FF;
if (tile_idx == 0 || tile_idx == 35 || tile_idx == 34 || tile_idx == 33 || (tank->ship == 1 && tile_idx == 18))i4 = 1;
if(i1 == 1 && i2 == 1 && i3 == 1 && i4 == 1) return 1;
// i1 = 0;
// i2 = 0;
// i3 = 0;
// i4 = 0;
//
// tile_idx = mapGetTile(x1, y1);
// tile_idx &= 0x1FF;
// if ((tile_idx >= 1) && (tile_idx <= 15)) i1 = 1;
// tile_idx = mapGetTile(x2, y1);
// tile_idx &= 0x1FF;
// if ((tile_idx >= 1) && (tile_idx <= 15)) i2 = 1;
// tile_idx = mapGetTile(x1, y2);
// tile_idx &= 0x1FF;
// if ((tile_idx >= 1) && (tile_idx <= 15)) i3 = 1;
// tile_idx = mapGetTile(x2, y2);
// tile_idx &= 0x1FF;
// if ((tile_idx >= 1) && (tile_idx <= 15)) i4 = 1;
// if(i1 == 1 && i2 == 1 && i3 == 1 && i4 == 1) return 1;
if (mods.en_no_walls) {
if (tank->player == 0) return 1;
return 0;
}
else {
return 0;
}
}
void detectBulletToUnitsCollision(_bullet *bull) {
u16 end = 2;
u16 i = 0;
s16 delta_x;
s16 delta_y;
_tank *player1 = &game_player[0];
_tank *player2 = &game_player[1];
//s16 gamer_bull_flag = 0;
if ((config.en_friend_fire == KILL) || (config.en_friend_fire == BULLETS_STOP)){
i = 0;
end = config.units_on_map;
//gamer_bull_flag = 1;
}
else {
if (bull->maker == player1 || bull->maker == player2) {
i = 0;
end = config.units_on_map;
//gamer_bull_flag = 1;
}
}
for (; i < end; i++) {
// if (!game_player[i].hitpoint || bull->maker == &game_player[i] || game_player[i].birth) continue;
if (!game_player[i].hitpoint || game_player[i].birth) continue;
if (mods.bul_ricochet) {
if ((!bull->ricocheted) && (bull->maker == &game_player[i])) continue;
}
else {
if (bull->maker == &game_player[i]) continue;
}
s16 bx = bull->posx;
s16 by = bull->posy;
if (bull->rotate == 3) {
bx -= 9;
} else if (bull->rotate == 2) {
by -= 9;
}
delta_x = bx - game_player[i].posx;
delta_y = by - game_player[i].posy;
if (delta_x < 0) delta_x = -delta_x;
if (delta_y < 0) delta_y = -delta_y;
if (delta_x < 15 && delta_y < 15) {
// detect player to player friendly fire
if ((bull->maker == &game_player[0]) || (bull->maker == &game_player[1])) {
if ((&game_player[i] == &game_player[0]) || (&game_player[i] == &game_player[1])) {
if (config.pl_friend_fire == OFF) {
continue;
}
else {
GLog_killBullet(bull, 1);
}
}
else {
GLog_killBullet(bull, 1);
}
}
else {
GLog_killBullet(bull, 1);
}
GLog_killPLayer(&game_player[i], bull->maker);
return;
}
}
}
void detectBulletToStaffCollision(_bullet *bull) {
u16 tile_idx = 0;
s16 x = bull->posx;
s16 y = bull->posy;
x += speed_x[bull->rotate] << 1;
y += speed_y[bull->rotate] << 1;
s16 x0 = x >> 3;
s16 y0 = y >> 3;
// u16 tile_idx = mapGetTile(bull->posx >> 3, bull->posy >> 3);
tile_idx = mapGetTile(x0, y0);
if (tile_idx >= RES_TILE_STAFF && tile_idx <= RES_TILE_STAFF + 4) {
GLog_killStaff();
GLog_killBullet(bull, 1);
}
}
void detectBulletToBulletCollision(_bullet *bull) {
u16 i = config.max_bullets;
_bullet *buff;
s16 delta_x;
s16 delta_y;
if (bull->maker != &game_player[0] && bull->maker != &game_player[1]) {
return;
}
while (i--) {
buff = &bullets[i];
if (!buff->speed || bull == buff)continue;
delta_x = bull->posx - buff->posx;
delta_y = bull->posy - buff->posy;
if (delta_x < 0)delta_x = -delta_x;
if (delta_y < 0)delta_y = -delta_y;
if (delta_x < 6 && delta_y < 6) {
GLog_killBullet(bull, 0);
GLog_killBullet(buff, 0);
}
}
}
u8 detectBonusColision(u8 player) {
s16 delta_x = game_player[player].posx - bonus.posx;
s16 delta_y = game_player[player].posy - bonus.posy;
if (delta_x < 0)delta_x = -delta_x;
if (delta_y < 0)delta_y = -delta_y;
if (delta_x < 16 && delta_y < 15)return 1;
return 0;
}