src/ship.cpp

   1 /*
   2 Copyright (C) 2003 Parallel Realities
   3 Copyright (C) 2011, 2012 Guus Sliepen
   4 Copyright (C) 2015, 2016 onpon4 <onpon4@riseup.net>
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 3
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "Starfighter.h"
  21
  22 bool ship_collision(object *ship, object *otherShip)
  23 {
  24         float x0 = ship->x;
  25         float y0 = ship->y;
  26         float w0 = ship->image[0]->w;
  27         float h0 = ship->image[0]->h;
  28
  29         float x2 = otherShip->x;
  30         float y2 = otherShip->y;
  31         float w1 = otherShip->image[0]->w;
  32         float h1 = otherShip->image[0]->h;
  33
  34         float x1 = x0 + w0;
  35         float y1 = y0 + h0;
  36
  37         float x3 = x2 + w1;
  38         float y3 = y2 + h1;
  39
  40         return !(x1<x2 || x3<x0 || y1<y2 || y3<y0);
  41 }
  42
  43 /*
  44 Fill in later...
  45 */
  46 void ship_fireBullet(object *ship, int weaponType)
  47 {
  48         if (ship->reload[weaponType] > 0)
  49                 return;
  50
  51         int y = (ship->image[0]->h) / 5;
  52
  53         // Remove some ammo from the player
  54         if ((ship == &player) && (weaponType == 1) && (!engine.cheatAmmo))
  55                 player.ammo[1]--;
  56
  57         object *theWeapon = &weapon[ship->weaponType[weaponType]];
  58
  59         switch(theWeapon->id)
  60         {
  61                 case WT_PLASMA:
  62                 case WT_SPREAD:
  63                 case WT_DIRECTIONAL:
  64                         audio_playSound(SFX_PLASMA, ship->x, ship->y);
  65                         break;
  66                 case WT_ROCKET:
  67                         audio_playSound(SFX_MISSILE, ship->x, ship->y);
  68                         break;
  69                 case WT_LASER:
  70                         audio_playSound(SFX_LASER, ship->x, ship->y);
  71                         break;
  72                 case WT_CHARGER:
  73                         audio_playSound(SFX_PLASMA3, ship->x, ship->y);
  74                         break;
  75         }
  76
  77         if (theWeapon->flags & WF_SPREAD && theWeapon->ammo[0] >= 3)
  78         {
  79                 bullet_add(theWeapon, ship, y * 2, -1);
  80                 bullet_add(theWeapon, ship, y * 4, 1);
  81
  82                 if (theWeapon->ammo[0] != 4)
  83                         bullet_add(theWeapon, ship, y * 3, 0);
  84                 else
  85                 {
  86                         bullet_add(theWeapon, ship, y * 2, 0);
  87                         bullet_add(theWeapon, ship, y * 4, 0);
  88                 }
  89
  90                 if (theWeapon->ammo[0] == 5)
  91                 {
  92                         bullet_add(theWeapon, ship, y * 1, -2);
  93                         bullet_add(theWeapon, ship, y * 5, 2);
  94                 }
  95         }
  96         else
  97         {
  98                 if (theWeapon->ammo[0] & 1)
  99                         bullet_add(theWeapon, ship, y * 3, 0);
 100
 101                 if (theWeapon->ammo[0] >= 2)
 102                 {
 103                         bullet_add(theWeapon, ship, y * 2, 0);
 104                         bullet_add(theWeapon, ship, y * 4, 0);
 105                 }
 106
 107                 if (theWeapon->ammo[0] >= 4)
 108                 {
 109                         bullet_add(theWeapon, ship, y * 1, 0);
 110                         bullet_add(theWeapon, ship, y * 5, 0);
 111                 }
 112         }
 113
 114         // Reset the weapon reload time. Double it if it is not friendly or
 115         // a boss or Kline
 116         ship->reload[weaponType] = theWeapon->reload[0];
 117         if ((ship->flags & FL_WEAPCO) && (ship != &aliens[ALIEN_BOSS]) &&
 118                         (ship != &aliens[ALIEN_KLINE]) && (theWeapon->id != W_LASER))
 119                 ship->reload[weaponType] *= 2;
 120
 121         if ((engine.cheatAmmo) || (theWeapon->id == WT_LASER))
 122                 return;
 123
 124         if ((ship == &player) && (weaponType == 0))
 125         {
 126                 if (player.ammo[0] > 0)
 127                 {
 128                         player.ammo[0]--;
 129                         if (player.ammo[0] <= 0)
 130                         {
 131                                 weapon[W_PLAYER_WEAPON].ammo[0] = game.minPlasmaOutput;
 132                                 weapon[W_PLAYER_WEAPON].damage = game.minPlasmaDamage;
 133                                 weapon[W_PLAYER_WEAPON].reload[0] = rate2reload[game.minPlasmaRate];
 134                         }
 135                 }
 136         }
 137 }
 138
 139 /*
 140 Fill in later...
 141 */
 142 void ship_fireRay(object *ship)
 143 {
 144         SDL_Rect ray;
 145
 146         if (ship->face == 0)
 147         {
 148                 ray.x = (int)(ship->x + ship->image[0]->w);
 149         }
 150         else
 151         {
 152                 ray.x = (int)(ship->x - 800);
 153         }
 154         ray.y = (int)(ship->y + ship->engineY - 1);
 155         ray.h = 3;
 156         ray.w = 800;
 157
 158         int red = SDL_MapRGB(screen->format, rand() % 256, 0x00, 0x00);
 159         SDL_FillRect(screen, &ray, red);
 160         screen_addBuffer(ray.x, ray.y, ray.w, ray.h);
 161
 162         if (ship != &player)
 163         {
 164                 if (player.shield > 0)
 165                 {
 166                         if (game_collision(player.x, player.y, player.image[0]->w,
 167                                                 player.image[0]->h, ray.x, ray.y, ray.w, ray.h) &&
 168                                         (!engine.cheatShield) && (engine.missionCompleteTimer == 0))
 169                         {
 170                                 if (player.shield > engine.lowShield)
 171                                 {
 172                                         if (player.shield - 1 <= engine.lowShield)
 173                                         {
 174                                                 setInfoLine("!!! \8cx\8d\90: \83V\81[\83\8b\83h\92á\89º !!!", FONT_RED);
 175                                         }
 176                                 }
 177                                 player.shield--;
 178
 179                                 explosion_add(player.x, player.y, SP_SMALL_EXPLOSION);
 180                                 audio_playSound(SFX_HIT, player.x, player.y);
 181                                 if (player.shield < 1)
 182                                 {
 183                                         audio_playSound(SFX_DEATH, player.x, player.y);
 184                                         audio_playSound(SFX_EXPLOSION, player.x, player.y);
 185                                 }
 186                         }
 187                 }
 188         }
 189
 190         for (int i = 0 ; i < ALIEN_MAX ; i++)
 191         {
 192                 if (aliens[i].flags & FL_IMMORTAL)
 193                         continue;
 194
 195                 if ((aliens[i].shield > 0) && (ship != &aliens[i]) &&
 196                         (ship->classDef != aliens[i].classDef))
 197                 {
 198                         if (game_collision(aliens[i].x, aliens[i].y, aliens[i].image[0]->w,
 199                                         aliens[i].image[0]->h, ray.x, ray.y, ray.w, ray.h))
 200                         {
 201                                 alien_hurt(&aliens[i], ship->owner, 1, false);
 202                         }
 203                 }
 204         }
 205
 206         ship->ammo[0]--;
 207         if (ship->ammo[0] < 1)
 208                 ship->flags &= ~FL_FIRERAY;
 209 }