src/intro.cpp

   1 /*
   2 Copyright (C) 2004-2011 Parallel Realities
   3 Copyright (C) 2011-2015 Perpendicular Dimensions
   4
   5 This program is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU General Public License
   7 as published by the Free Software Foundation; either version 2
   8 of the License, or (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13
  14 See the 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 */
  21
  22 #include "intro.h"
  23
  24 void playIntro(int tx, int ty, int delay)
  25 {
  26         unsigned int frameLimit = SDL_GetTicks() + 16;
  27         unsigned int time = 0;
  28
  29         graphics.setFontSize(1);
  30         graphics.setFontColor(0xff, 0xff, 0xff, 0x00, 0x00, 0x00);
  31
  32         char *line[3];
  33         SDL_Surface *text[3];
  34
  35         for (int i = 0 ; i < 3 ; i++)
  36         {
  37                 line[i] = strtok(NULL, "\n");
  38
  39                 if (!line[i])
  40                 {
  41                         graphics.showErrorAndExit("Malformed Intro Data", "");
  42                 }
  43
  44                 text[i] = NULL;
  45
  46                 if (strcmp(line[i], "@none@"))
  47                 {
  48                         text[i] = graphics.getString(line[i], true);
  49                 }
  50         }
  51
  52         player.tx += tx;
  53         player.ty += ty;
  54
  55         while (true)
  56         {
  57                 engine.setPlayerPosition((int)player.x, (int)player.y, map.limitLeft, map.limitRight, map.limitUp, map.limitDown);
  58
  59                 doGameStuff();
  60                 doSpawnPoints();
  61                 drawMapTopLayer();
  62
  63                 for (int i = 0 ; i < 3 ; i++)
  64                         if (text[i] != NULL)
  65                                 graphics.blit(text[i], 320, 150 + (i * 30), graphics.screen, true);
  66
  67                 if (engine.userAccepts())
  68                         break;
  69
  70                 if (player.x < player.tx) player.x++;
  71                 if (player.x > player.tx) player.x--;
  72
  73                 if ((int)player.x == player.tx)
  74                 {
  75                         if (time == 0)
  76                         {
  77                                 time = SDL_GetTicks() + (delay * 1000);
  78                         }
  79                 }
  80
  81                 if (time > 0)
  82                         if (SDL_GetTicks() > time)
  83                                 break;
  84
  85                 engine.delay(frameLimit);
  86                 frameLimit = SDL_GetTicks() + 16;
  87         }
  88
  89         for (int i = 0 ; i < 3 ; i++)
  90                 if (text[i])
  91                         SDL_FreeSurface(text[i]);
  92 }
  93
  94 void showIntroError()
  95 {
  96         SDL_FillRect(graphics.screen, NULL, graphics.black);
  97
  98         engine.flushInput();
  99
 100         graphics.setFontSize(1);
 101
 102         graphics.drawString("Couldn't play intro - Data file is missing.", 320, 150, true, graphics.screen);
 103         graphics.drawString("This is not a fatal error, but could mean that the intro", 320, 180, true, graphics.screen);
 104         graphics.drawString("file has not been found or was not in the expected format.", 320, 210, true, graphics.screen);
 105         graphics.drawString("However it may also be a sign that the game may not work correctly.", 320, 240, true, graphics.screen);
 106         graphics.drawString("Press Escape to Continue", 320, 350, true, graphics.screen);
 107
 108         while (true)
 109         {
 110                 graphics.updateScreen();
 111                 engine.getInput();
 112                 config.populate();
 113                 if (engine.keyState[SDL_SCANCODE_ESCAPE])
 114                         break;
 115                 SDL_Delay(16);
 116         }
 117 }
 118
 119 void parseIntroCommand()
 120 {
 121         char *line;
 122         char command[25], param[25];
 123
 124         line = strtok(NULL, "\n");
 125         sscanf(line, "%s %s", command, param);
 126
 127         if (strcmp(command, "SPAWN") == 0)
 128         {
 129                 SpawnPoint *sp = (SpawnPoint*)map.spawnList.getHead();
 130
 131                 while (sp->next != NULL)
 132                 {
 133                         sp = (SpawnPoint*)sp->next;
 134
 135                         if (strcmp(param, sp->name) == 0)
 136                         {
 137                                 sp->active = true;
 138                         }
 139                 }
 140         }
 141 }
 142
 143 int doIntro()
 144 {
 145         int x, y, delay;
 146
 147         game.setMapName("data/introMap");
 148
 149         loadResources();
 150
 151         for (int i = 0 ; i < 4 ; i++)
 152         {
 153                 addItem(101, "CherryPlant", Math::prand() % 640, 9050, "CherryPlant", 100, 1, 0, false);
 154         }
 155
 156         if (!engine.loadData(_("data/introText")))
 157         {
 158                 showIntroError();
 159                 return SECTION_TITLE;
 160         }
 161
 162         player.health = -100;
 163
 164         audio.playMusic();
 165
 166         char *line = strtok((char*)engine.dataBuffer, "\n");
 167
 168         while (true)
 169         {
 170                 line = strtok(NULL, "\n");
 171                 sscanf(line, "%d %d %d", &x, &y, &delay);
 172
 173                 if (delay == -1)
 174                         break;
 175
 176                 parseIntroCommand();
 177
 178                 playIntro(x, y, delay);
 179
 180                 if (engine.userAccepts())
 181                         break;
 182         }
 183
 184         if (!engine.userAccepts())
 185         {
 186                 audio.fadeMusic();
 187                 graphics.fadeToBlack();
 188         }
 189
 190         map.clear();
 191
 192         return SECTION_TITLE;
 193 }