src/special.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux -  A Jump'n Run
   4 //  Copyright (C) 2003 Tobias Glaesser <tobi.web@gmx.de>
   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 2
   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, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20 #include <assert.h>
  21 #include <iostream>
  22 #include "SDL.h"
  23 #include "defines.h"
  24 #include "special.h"
  25 #include "camera.h"
  26 #include "gameloop.h"
  27 #include "screen/screen.h"
  28 #include "sound.h"
  29 #include "scene.h"
  30 #include "globals.h"
  31 #include "player.h"
  32 #include "sector.h"
  33 #include "sprite_manager.h"
  34 #include "resources.h"
  35
  36 Sprite* img_firebullet;
  37 Sprite* img_icebullet;
  38 Sprite* img_star;
  39 Sprite* img_growup;
  40 Sprite* img_iceflower;
  41 Sprite* img_fireflower;
  42 Sprite* img_1up;
  43
  44 #define GROWUP_SPEED 1.0f
  45
  46 #define BULLET_STARTING_YM 0
  47 #define BULLET_XM 6
  48
  49 Bullet::Bullet(const Vector& pos, float xm, int dir, int kind_)
  50 {
  51   life_count = 3;
  52   base.width = 4;
  53   base.height = 4;
  54
  55   if (kind == ICE_BULLET)
  56     life_count = 6; //ice-bullets get "extra lives" for bumping off walls
  57
  58   if (dir == RIGHT)
  59     {
  60       base.x = pos.x + 32;
  61       physic.set_velocity_x(BULLET_XM + xm);
  62     }
  63   else
  64     {
  65       base.x = pos.x;
  66       physic.set_velocity_x(-BULLET_XM + xm);
  67     }
  68
  69   base.y = pos.y;
  70   physic.set_velocity_y(-BULLET_STARTING_YM);
  71   old_base = base;
  72   kind = kind_;
  73 }
  74
  75 void
  76 Bullet::action(float elapsed_time)
  77 {
  78   elapsed_time *= 0.5f;
  79
  80   float old_y = base.y;
  81
  82   physic.apply(elapsed_time, base.x, base.y);
  83   collision_swept_object_map(&old_base,&base);
  84
  85   if (issolid(base.x, base.y + 4) || issolid(base.x, base.y))
  86     {
  87       base.y  = old_y;
  88       physic.set_velocity_y(-physic.get_velocity_y());
  89       life_count -= 1;
  90     }
  91
  92   if(kind == FIRE_BULLET)
  93     // @not framerate independant :-/
  94     physic.set_velocity_y(physic.get_velocity_y() - 0.5 * elapsed_time);
  95   if(physic.get_velocity_y() > 9)
  96     physic.set_velocity_y(9);
  97   else if(physic.get_velocity_y() < -9)
  98     physic.set_velocity_y(-9);
  99
 100   float scroll_x =
 101     Sector::current()->camera->get_translation().x;
 102   float scroll_y =
 103     Sector::current()->camera->get_translation().y;
 104   if (base.x < scroll_x ||
 105       base.x > scroll_x + screen->w ||
 106       base.y < scroll_y ||
 107       base.y > scroll_y + screen->h ||
 108       life_count <= 0)
 109     {
 110       remove_me();
 111     }
 112   if (issolid(base.x + 4, base.y + 2) ||
 113       issolid(base.x, base.y + 2))
 114      {
 115        if (kind == FIRE_BULLET)
 116          remove_me();
 117        else if (kind == ICE_BULLET)
 118          {
 119            physic.set_velocity_x(physic.get_velocity_x() * -1);
 120          }
 121      }
 122 }
 123
 124 void
 125 Bullet::draw(DrawingContext& context)
 126 {
 127   Sprite* sprite = kind == FIRE_BULLET ? img_firebullet : img_icebullet;
 128
 129   sprite->draw(context, Vector(base.x, base.y), LAYER_OBJECTS);
 130 }
 131
 132 void
 133 Bullet::collision(const MovingObject& , int)
 134 {
 135   // later
 136 }
 137
 138 void
 139 Bullet::collision(int c_object)
 140 {
 141   if(c_object == CO_BADGUY) {
 142     remove_me();
 143   }
 144 }
 145
 146 //---------------------------------------------------------------------------
 147
 148 Upgrade::Upgrade(const Vector& pos, Direction dir_, UpgradeKind kind_)
 149 {
 150   kind = kind_;
 151   dir = dir_;
 152
 153   base.width = 32;
 154   base.height = 0;
 155   base.x = pos.x;
 156   base.y = pos.y;
 157   old_base = base;
 158
 159   physic.reset();
 160   physic.enable_gravity(false);
 161
 162   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 163     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 164     physic.enable_gravity(true);
 165     base.height = 32;
 166   } else if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_FIREFLOWER) {
 167     // nothing
 168   } else if (kind == UPGRADE_GROWUP) {
 169     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 170   } else {
 171     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 172   }
 173 }
 174
 175 Upgrade::~Upgrade()
 176 {
 177 }
 178
 179 void
 180 Upgrade::action(float elapsed_time)
 181 {
 182   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_FIREFLOWER
 183       || kind == UPGRADE_GROWUP) {
 184     if (base.height < 32) {
 185       /* Rise up! */
 186       base.height = base.height + 0.7 * elapsed_time;
 187       if(base.height > 32)
 188         base.height = 32;
 189
 190       return;
 191     }
 192   }
 193
 194   /* Away from the screen? Kill it! */
 195   float scroll_x =
 196     Sector::current()->camera->get_translation().x;
 197   float scroll_y =
 198     Sector::current()->camera->get_translation().y;
 199
 200   if(base.x < scroll_x - X_OFFSCREEN_DISTANCE ||
 201       base.x > scroll_x + screen->w + X_OFFSCREEN_DISTANCE ||
 202       base.y < scroll_y - Y_OFFSCREEN_DISTANCE ||
 203       base.y > scroll_y + screen->h + Y_OFFSCREEN_DISTANCE)
 204     {
 205     remove_me();
 206     return;
 207     }
 208
 209   /* Move around? */
 210   physic.apply(elapsed_time, base.x, base.y);
 211   if(kind == UPGRADE_GROWUP) {
 212     collision_swept_object_map(&old_base, &base);
 213   }
 214
 215   // fall down?
 216   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 217     // falling?
 218     if(physic.get_velocity_y() != 0) {
 219       if(issolid(base.x, base.y + base.height)) {
 220         base.y = int(base.y / 32) * 32;
 221         old_base = base;
 222         if(kind == UPGRADE_GROWUP) {
 223           physic.enable_gravity(false);
 224           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 225         } else if(kind == UPGRADE_HERRING) {
 226           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 227         }
 228       }
 229     } else {
 230       if((physic.get_velocity_x() < 0
 231             && !issolid(base.x+base.width, base.y + base.height))
 232         || (physic.get_velocity_x() > 0
 233             && !issolid(base.x, base.y + base.height))) {
 234         physic.enable_gravity(true);
 235       }
 236     }
 237   }
 238
 239   // horizontal bounce?
 240   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 241     if (  (physic.get_velocity_x() < 0
 242           && issolid(base.x, (int) base.y + base.height/2))
 243         ||  (physic.get_velocity_x() > 0
 244           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 245         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 246         dir = dir == LEFT ? RIGHT : LEFT;
 247     }
 248   }
 249 }
 250
 251 void
 252 Upgrade::draw(DrawingContext& context)
 253 {
 254   Sprite* sprite;
 255   switch(kind) {
 256     case UPGRADE_GROWUP: sprite = img_growup; break;
 257     case UPGRADE_ICEFLOWER: sprite = img_iceflower; break;
 258     case UPGRADE_FIREFLOWER: sprite = img_fireflower; break;
 259     case UPGRADE_HERRING: sprite = img_star; break;
 260     case UPGRADE_1UP: sprite = img_1up; break;
 261     default:
 262       assert(!"wrong type in Powerup::draw()");
 263   }
 264
 265   if(base.height < 32) // still raising up?
 266     sprite->draw(context, Vector(base.x, base.y + (32 - base.height)),
 267         LAYER_TILES - 10);
 268   else
 269     sprite->draw(context, Vector(base.x, base.y), LAYER_OBJECTS);
 270 }
 271
 272 void
 273 Upgrade::bump(Player* player)
 274 {
 275   // these can't be bumped
 276   if(kind != UPGRADE_GROWUP)
 277     return;
 278
 279   sound_manager->play_sound(sounds[SND_BUMP_UPGRADE], Vector(base.x, base.y));
 280
 281   // determine new direction
 282   Direction old_dir = dir;
 283   if (player->base.x + player->base.width/2 > base.x + base.width/2)
 284     dir = LEFT;
 285   else
 286     dir = RIGHT;
 287
 288   // do a little jump and change direction (if necessary)
 289   if (dir != old_dir)
 290     physic.set_velocity(-physic.get_velocity_x(), 3);
 291   else
 292     physic.set_velocity_y(3);
 293
 294   physic.enable_gravity(true);
 295 }
 296
 297 void
 298 Upgrade::collision(const MovingObject& , int)
 299 {
 300   // later
 301 }
 302
 303 void
 304 Upgrade::collision(void* p_c_object, int c_object, CollisionType type)
 305 {
 306   Player* pplayer = NULL;
 307
 308   if(type == COLLISION_BUMP) {
 309     if(c_object == CO_PLAYER)
 310       pplayer = (Player*) p_c_object;
 311     bump(pplayer);
 312     return;
 313   }
 314
 315   switch (c_object)
 316     {
 317     case CO_PLAYER:
 318       /* Remove the upgrade: */
 319
 320       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 321       pplayer = (Player*) p_c_object;
 322
 323       /* Affect the player: */
 324
 325       if (kind == UPGRADE_GROWUP)
 326         {
 327           sound_manager->play_sound(sounds[SND_EXCELLENT]);
 328           pplayer->grow(true);
 329         }
 330       else if (kind == UPGRADE_FIREFLOWER)
 331         {
 332           sound_manager->play_sound(sounds[SND_COFFEE]);
 333           pplayer->grow(true);
 334           pplayer->got_power = pplayer->FIRE_POWER;
 335         }
 336       else if (kind == UPGRADE_ICEFLOWER)
 337         {
 338           sound_manager->play_sound(sounds[SND_COFFEE]);
 339           pplayer->grow(true);
 340           pplayer->got_power = pplayer->ICE_POWER;
 341         }
 342       else if (kind == UPGRADE_FIREFLOWER)
 343         {
 344           sound_manager->play_sound(sounds[SND_COFFEE]);
 345           pplayer->grow(true);
 346           pplayer->got_power = pplayer->FIRE_POWER;
 347         }
 348       else if (kind == UPGRADE_HERRING)
 349         {
 350           sound_manager->play_sound(sounds[SND_HERRING]);
 351           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 352           Sector::current()->play_music(HERRING_MUSIC);
 353         }
 354       else if (kind == UPGRADE_1UP)
 355         {
 356           if(player_status.lives < MAX_LIVES) {
 357             player_status.lives++;
 358             sound_manager->play_sound(sounds[SND_LIFEUP]);
 359           }
 360         }
 361
 362       remove_me();
 363       return;
 364     }
 365 }
 366
 367 void load_special_gfx()
 368 {
 369   img_growup    = sprite_manager->load("egg");
 370   img_iceflower = sprite_manager->load("iceflower");
 371   img_fireflower = sprite_manager->load("fireflower");
 372   img_star      = sprite_manager->load("star");
 373   img_1up       = sprite_manager->load("1up");
 374
 375   img_firebullet = sprite_manager->load("firebullet");
 376   img_icebullet  = sprite_manager->load("icebullet");
 377 }
 378
 379 void free_special_gfx()
 380 {
 381 }
 382