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 "gameloop.h"
  26 #include "screen.h"
  27 #include "sound.h"
  28 #include "scene.h"
  29 #include "globals.h"
  30 #include "player.h"
  31 #include "sprite_manager.h"
  32 #include "resources.h"
  33
  34 Sprite* img_bullet;
  35 Sprite* img_star;
  36 Sprite* img_growup;
  37 Sprite* img_iceflower;
  38 Sprite* img_1up;
  39
  40 #define GROWUP_SPEED 1.0f
  41
  42 #define BULLET_STARTING_YM 0
  43 #define BULLET_XM 6
  44
  45 void
  46 Bullet::init(float x, float y, float xm, Direction dir)
  47 {
  48   life_count = 3;
  49   base.width = 4;
  50   base.height = 4;
  51
  52   if (dir == RIGHT)
  53     {
  54       base.x = x + 32;
  55       base.xm = BULLET_XM + xm;
  56     }
  57   else
  58     {
  59       base.x = x;
  60       base.xm = -BULLET_XM + xm;
  61     }
  62
  63   base.y = y;
  64   base.ym = BULLET_STARTING_YM;
  65   old_base = base;
  66 }
  67
  68 void
  69 Bullet::remove_me()
  70 {
  71   std::vector<Bullet>& bullets = World::current()->bullets;
  72   for(std::vector<Bullet>::iterator i = bullets.begin();
  73          i != bullets.end(); ++i) {
  74     if( & (*i) == this) {
  75       bullets.erase(i);
  76       return;
  77     }
  78   }
  79
  80   assert(false);
  81 }
  82
  83 void
  84 Bullet::action(double frame_ratio)
  85 {
  86   frame_ratio *= 0.5f;
  87
  88   float old_y = base.y;
  89
  90   base.x = base.x + base.xm * frame_ratio;
  91   base.y = base.y + base.ym * frame_ratio;
  92
  93   collision_swept_object_map(&old_base,&base);
  94
  95   if (issolid(base.x, base.y + 4) || issolid(base.x, base.y))
  96     {
  97       base.y  = old_y;
  98       base.ym = -base.ym;
  99       if (base.ym > 9)
 100         base.ym = 9;
 101       else if (base.ym < -9)
 102         base.ym = -9;
 103       life_count -= 1;
 104     }
 105
 106   base.ym = base.ym + 0.5 * frame_ratio;
 107
 108   if (base.x < scroll_x ||
 109       base.x > scroll_x + screen->w ||
 110       base.y < 0 ||
 111       base.y > screen->h ||
 112       issolid(base.x + 4, base.y + 2) ||
 113       issolid(base.x, base.y + 2) ||
 114       life_count <= 0)
 115     {
 116       remove_me();
 117     }
 118
 119 }
 120
 121 void
 122 Bullet::draw()
 123 {
 124   if (base.x >= scroll_x - base.width &&
 125       base.x <= scroll_x + screen->w)
 126     {
 127       img_bullet->draw(base.x - scroll_x, base.y);
 128     }
 129 }
 130
 131 void
 132 Bullet::collision(int c_object)
 133 {
 134   if(c_object == CO_BADGUY) {
 135     remove_me();
 136   }
 137 }
 138
 139 void
 140 Upgrade::init(float x_, float y_, Direction dir_, UpgradeKind kind_)
 141 {
 142   kind = kind_;
 143   dir = dir_;
 144
 145   base.width = 32;
 146   base.height = 0;
 147   base.x = x_;
 148   base.y = y_;
 149   old_base = base;
 150
 151   physic.reset();
 152   physic.enable_gravity(false);
 153
 154   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 155     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 156     physic.enable_gravity(true);
 157     base.height = 32;
 158   } else if (kind == UPGRADE_ICEFLOWER) {
 159     // nothing
 160   } else if (kind == UPGRADE_GROWUP) {
 161     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 162   } else {
 163     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 164   }
 165 }
 166
 167 void
 168 Upgrade::remove_me()
 169 {
 170   std::vector<Upgrade>& upgrades = World::current()->upgrades;
 171   for(std::vector<Upgrade>::iterator i = upgrades.begin();
 172          i != upgrades.end(); ++i) {
 173     if( & (*i) == this) {
 174       upgrades.erase(i);
 175       return;
 176     }
 177   }
 178
 179   assert(false);
 180 }
 181
 182 void
 183 Upgrade::action(double frame_ratio)
 184 {
 185   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_GROWUP) {
 186     if (base.height < 32) {
 187       /* Rise up! */
 188       base.height = base.height + 0.7 * frame_ratio;
 189       if(base.height > 32)
 190         base.height = 32;
 191
 192       return;
 193     }
 194   }
 195
 196   /* Off screen? Kill it! */
 197   if(base.x < scroll_x - base.width || base.y > screen->h) {
 198     remove_me();
 199     return;
 200   }
 201
 202   /* Move around? */
 203   physic.apply(frame_ratio, base.x, base.y);
 204   if(kind == UPGRADE_GROWUP) {
 205     collision_swept_object_map(&old_base, &base);
 206   }
 207
 208   // fall down?
 209   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 210     // falling?
 211     if(physic.get_velocity_y() != 0) {
 212       if(issolid(base.x, base.y + base.height)) {
 213         base.y = int(base.y / 32) * 32;
 214         old_base = base;
 215         if(kind == UPGRADE_GROWUP) {
 216           physic.enable_gravity(false);
 217           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 218         } else if(kind == UPGRADE_HERRING) {
 219           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 220         }
 221       }
 222     } else {
 223       if((physic.get_velocity_x() < 0
 224             && !issolid(base.x+base.width, base.y + base.height))
 225         || (physic.get_velocity_x() > 0
 226             && !issolid(base.x, base.y + base.height))) {
 227         physic.enable_gravity(true);
 228       }
 229     }
 230   }
 231
 232   // horizontal bounce?
 233   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 234     if (  (physic.get_velocity_x() < 0
 235           && issolid(base.x, (int) base.y + base.height/2))
 236         ||  (physic.get_velocity_x() > 0
 237           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 238         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 239         dir = dir == LEFT ? RIGHT : LEFT;
 240     }
 241   }
 242 }
 243
 244 void
 245 Upgrade::draw()
 246 {
 247   SDL_Rect dest;
 248   if (base.height < 32)
 249     {
 250       /* Rising up... */
 251
 252       dest.x = (int)(base.x - scroll_x);
 253       dest.y = (int)(base.y + 32 - base.height);
 254       dest.w = 32;
 255       dest.h = (int)base.height;
 256
 257       if (kind == UPGRADE_GROWUP)
 258         img_growup->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 259       else if (kind == UPGRADE_ICEFLOWER)
 260         img_iceflower->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 261       else if (kind == UPGRADE_HERRING)
 262         img_star->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 263       else if (kind == UPGRADE_1UP)
 264         img_1up->draw_part( 0, 0, dest.x, dest.y, dest.w, dest.h);
 265     }
 266   else
 267     {
 268       if (kind == UPGRADE_GROWUP)
 269         {
 270           img_growup->draw(
 271                        base.x - scroll_x, base.y);
 272         }
 273       else if (kind == UPGRADE_ICEFLOWER)
 274         {
 275           img_iceflower->draw(
 276                        base.x - scroll_x, base.y);
 277         }
 278       else if (kind == UPGRADE_HERRING)
 279         {
 280           img_star->draw(
 281                        base.x - scroll_x, base.y);
 282         }
 283       else if (kind == UPGRADE_1UP)
 284         {
 285           img_1up->draw( base.x - scroll_x, base.y);
 286         }
 287     }
 288 }
 289
 290 void
 291 Upgrade::collision(void* p_c_object, int c_object)
 292 {
 293   Player* pplayer = NULL;
 294
 295   switch (c_object)
 296     {
 297     case CO_PLAYER:
 298       /* Remove the upgrade: */
 299
 300       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 301       pplayer = (Player*) p_c_object;
 302
 303       /* Affect the player: */
 304
 305       if (kind == UPGRADE_GROWUP)
 306         {
 307           play_sound(sounds[SND_EXCELLENT], SOUND_CENTER_SPEAKER);
 308           pplayer->size = BIG;
 309           pplayer->base.height = 64;
 310           pplayer->base.y -= 32;
 311           if(collision_object_map(pplayer->base))
 312             {
 313               pplayer->base.height = 32;
 314               pplayer->base.y += 32;
 315               pplayer->duck = true;
 316             }
 317         }
 318       else if (kind == UPGRADE_ICEFLOWER)
 319         {
 320           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 321           pplayer->got_coffee = true;
 322           if (pplayer->size == SMALL)
 323             {
 324               pplayer->size = BIG;
 325               pplayer->base.height = 64;
 326               pplayer->base.y -= 32;
 327             }
 328           if(collision_object_map(pplayer->base))
 329             {
 330               pplayer->base.height = 32;
 331               pplayer->base.y += 32;
 332               pplayer->duck = true;
 333             }
 334         }
 335       else if (kind == UPGRADE_HERRING)
 336         {
 337           play_sound(sounds[SND_HERRING], SOUND_CENTER_SPEAKER);
 338           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 339           World::current()->play_music(HERRING_MUSIC);
 340         }
 341       else if (kind == UPGRADE_1UP)
 342         {
 343           if(player_status.lives < MAX_LIVES) {
 344             player_status.lives++;
 345             play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 346           }
 347         }
 348
 349       remove_me();
 350       return;
 351     }
 352 }
 353
 354 void load_special_gfx()
 355 {
 356   img_growup    = sprite_manager->load("egg");
 357   img_iceflower = sprite_manager->load("iceflower");
 358   img_star      = sprite_manager->load("star");
 359   img_1up       = sprite_manager->load("1up");
 360
 361   img_bullet    = sprite_manager->load("bullet");
 362 }
 363
 364 void free_special_gfx()
 365 {
 366   delete img_bullet;
 367 }
 368