src/intro.cpp

   1 /*
   2 Copyright (C) 2004-2010 Parallel Realities
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20
  21 #include "intro.h"
  22
  23 void playIntro(int tx, int ty, int delay)
  24 {
  25         unsigned int frameLimit = SDL_GetTicks() + 16;
  26         unsigned int time = 0;
  27
  28         graphics.setFontSize(1);
  29         graphics.setFontColor(0xff, 0xff, 0xff, 0x00, 0x00, 0x00);
  30
  31         char *line[3];
  32         SDL_Surface *text[3];
  33
  34         for (int i = 0 ; i < 3 ; i++)
  35         {
  36                 line[i] = strtok(NULL, "\n");
  37
  38                 if (!line[i])
  39                 {
  40                         graphics.showErrorAndExit("Malformed Intro Data", "");
  41                 }
  42
  43                 text[i] = NULL;
  44
  45                 if (strcmp(line[i], "@none@"))
  46                 {
  47                         text[i] = graphics.getString(line[i], true);
  48                 }
  49         }
  50
  51         player.tx += tx;
  52         player.ty += ty;
  53
  54         while (true)
  55         {
  56                 engine.setPlayerPosition((int)player.x, (int)player.y, map.limitLeft, map.limitRight, map.limitUp, map.limitDown);
  57
  58                 doGameStuff();
  59                 doSpawnPoints();
  60                 drawMapTopLayer();
  61
  62                 for (int i = 0 ; i < 3 ; i++)
  63                         if (text[i] != NULL)
  64                                 graphics.blit(text[i], 320, 150 + (i * 30), graphics.screen, true);
  65
  66                 if (engine.userAccepts())
  67                         break;
  68
  69                 if (player.x < player.tx) player.x++;
  70                 if (player.x > player.tx) player.x--;
  71
  72                 if ((int)player.x == player.tx)
  73                 {
  74                         if (time == 0)
  75                         {
  76                                 time = SDL_GetTicks() + (delay * 1000);
  77                         }
  78                 }
  79
  80                 if (time > 0)
  81                         if (SDL_GetTicks() > time)
  82                                 break;
  83
  84                 engine.delay(frameLimit);
  85                 frameLimit = SDL_GetTicks() + 16;
  86         }
  87
  88         for (int i = 0 ; i < 3 ; i++)
  89                 if (text[i])
  90                         SDL_FreeSurface(text[i]);
  91 }
  92
  93 void showIntroError()
  94 {
  95         SDL_FillRect(graphics.screen, NULL, graphics.black);
  96
  97         engine.flushInput();
  98
  99         graphics.setFontSize(1);
 100
 101         graphics.drawString("Couldn't play intro - Data file is missing.", 320, 150, true, graphics.screen);
 102         graphics.drawString("This is not a fatal error, but could mean that the intro", 320, 180, true, graphics.screen);
 103         graphics.drawString("file has not been found or was not in the expected format.", 320, 210, true, graphics.screen);
 104         graphics.drawString("However it may also be a sign that the game may not work correctly.", 320, 240, true, graphics.screen);
 105         graphics.drawString("Press Escape to Continue", 320, 350, true, graphics.screen);
 106
 107         while (true)
 108         {
 109                 graphics.updateScreen();
 110                 engine.getInput();
 111                 config.populate();
 112                 if (engine.keyState[SDLK_ESCAPE])
 113                         break;
 114                 SDL_Delay(16);
 115         }
 116 }
 117
 118 void parseIntroCommand()
 119 {
 120         char *line;
 121         char command[25], param[25];
 122
 123         line = strtok(NULL, "\n");
 124         sscanf(line, "%s %s", command, param);
 125
 126         if (strcmp(command, "SPAWN") == 0)
 127         {
 128                 SpawnPoint *sp = (SpawnPoint*)map.spawnList.getHead();
 129
 130                 while (sp->next != NULL)
 131                 {
 132                         sp = (SpawnPoint*)sp->next;
 133
 134                         if (strcmp(param, sp->name) == 0)
 135                         {
 136                                 sp->active = true;
 137                         }
 138                 }
 139         }
 140 }
 141
 142 int doIntro()
 143 {
 144         int x, y, delay;
 145
 146         game.setMapName("data/introMap");
 147
 148         loadResources();
 149
 150         for (int i = 0 ; i < 4 ; i++)
 151         {
 152                 addItem(101, "CherryPlant", Math::prand() % 640, 9050, "CherryPlant", 100, 1, 0, false);
 153         }
 154
 155         if (!engine.loadData(_("data/introText")))
 156         {
 157                 showIntroError();
 158                 return SECTION_TITLE;
 159         }
 160
 161         player.health = -100;
 162
 163         audio.playMusic();
 164
 165         char *line = strtok((char*)engine.dataBuffer, "\n");
 166
 167         while (true)
 168         {
 169                 line = strtok(NULL, "\n");
 170                 sscanf(line, "%d %d %d", &x, &y, &delay);
 171
 172                 if (delay == -1)
 173                         break;
 174
 175                 parseIntroCommand();
 176
 177                 playIntro(x, y, delay);
 178
 179                 if (engine.userAccepts())
 180                         break;
 181         }
 182
 183         if (!engine.userAccepts())
 184         {
 185                 audio.fadeMusic();
 186                 graphics.fadeToBlack();
 187         }
 188
 189         map.clear();
 190
 191         return SECTION_TITLE;
 192 }