src/badguy/snail.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux - Badguy "Snail"
   4 //  Copyright (C) 2006 Christoph Sommer <christoph.sommer@2006.expires.deltadevelopment.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 <config.h>
  21
  22 #include "snail.hpp"
  23 #include "object/block.hpp"
  24
  25 namespace {
  26   const float WALKSPEED = 80;
  27   const float KICKSPEED = 500;
  28   const int MAXSQUISHES = 10;
  29   const float KICKSPEED_Y = -500; /**< y-velocity gained when kicked */
  30 }
  31
  32 Snail::Snail(const lisp::Lisp& reader)
  33   : BadGuy(reader, "images/creatures/snail/snail.sprite"), state(STATE_NORMAL), squishcount(0)
  34 {
  35   set_direction = false;
  36   sound_manager->preload("sounds/iceblock_bump.wav");
  37   sound_manager->preload("sounds/stomp.wav");
  38   sound_manager->preload("sounds/kick.wav");
  39 }
  40
  41 Snail::Snail(const Vector& pos, Direction d)
  42   : BadGuy(pos, "images/creatures/snail/snail.sprite"), state(STATE_NORMAL), squishcount(0)
  43 {
  44   set_direction = true;
  45   initial_direction = d;
  46   sound_manager->preload("sounds/iceblock_bump.wav");
  47   sound_manager->preload("sounds/stomp.wav");
  48   sound_manager->preload("sounds/kick.wav");
  49 }
  50
  51 void
  52 Snail::write(lisp::Writer& writer)
  53 {
  54   writer.start_list("snail");
  55
  56   writer.write_float("x", start_position.x);
  57   writer.write_float("y", start_position.y);
  58
  59   writer.end_list("snail");
  60 }
  61
  62 void
  63 Snail::activate()
  64 {
  65   if (set_direction) {dir = initial_direction;}
  66
  67   be_normal();
  68 }
  69
  70 void
  71 Snail::be_normal()
  72 {
  73   state = STATE_NORMAL;
  74   sprite->set_action(dir == LEFT ? "left" : "right");
  75
  76   physic.set_velocity_x(dir == LEFT ? -WALKSPEED : WALKSPEED);
  77 }
  78
  79 void
  80 Snail::be_flat()
  81 {
  82   state = STATE_FLAT;
  83   sprite->set_action(dir == LEFT ? "flat-left" : "flat-right");
  84   sprite->set_fps(64);
  85
  86   physic.set_velocity_x(0);
  87   physic.set_velocity_y(0);
  88
  89   flat_timer.start(4);
  90 }
  91
  92 void
  93 Snail::be_kicked()
  94 {
  95   state = STATE_KICKED_DELAY;
  96   sprite->set_action(dir == LEFT ? "flat-left" : "flat-right");
  97   sprite->set_fps(64);
  98
  99   physic.set_velocity_x(0);
 100   physic.set_velocity_y(0);
 101
 102   // start a timer to delay addition of upward movement until we are (hopefully) out from under the player
 103   kicked_delay_timer.start(0.05);
 104 }
 105
 106
 107 void
 108 Snail::active_update(float elapsed_time)
 109 {
 110   switch (state) {
 111
 112     case STATE_NORMAL:
 113       if (might_fall(601)) {
 114         dir = (dir == LEFT ? RIGHT : LEFT);
 115         sprite->set_action(dir == LEFT ? "left" : "right");
 116         physic.set_velocity_x(-physic.get_velocity_x());
 117       }
 118       break;
 119
 120     case STATE_FLAT:
 121       if (flat_timer.started()) {
 122         sprite->set_fps(64 - 15 * flat_timer.get_timegone());
 123       }
 124       if (flat_timer.check()) {
 125         be_normal();
 126       }
 127       break;
 128
 129     case STATE_KICKED_DELAY:
 130       if (kicked_delay_timer.check()) {
 131         physic.set_velocity_x(dir == LEFT ? -KICKSPEED : KICKSPEED);
 132         physic.set_velocity_y(KICKSPEED_Y);
 133         state = STATE_KICKED;
 134       }
 135       break;
 136
 137     case STATE_KICKED:
 138       physic.set_velocity_x(physic.get_velocity_x() * pow(0.99, elapsed_time/0.02));
 139       if (fabsf(physic.get_velocity_x()) < WALKSPEED) be_normal();
 140       break;
 141
 142   }
 143   BadGuy::active_update(elapsed_time);
 144 }
 145
 146 HitResponse
 147 Snail::collision_solid(GameObject& object, const CollisionHit& hit)
 148 {
 149   if(fabsf(hit.normal.y) > .5) { // floor or roof
 150     physic.set_velocity_y(0);
 151
 152     switch (state) {
 153       case STATE_NORMAL:
 154       case STATE_FLAT:
 155       case STATE_KICKED_DELAY:
 156         break;
 157       case STATE_KICKED:
 158         break;
 159     }
 160
 161     return CONTINUE;
 162   }
 163   // hit left or right
 164   switch(state) {
 165
 166     case STATE_NORMAL:
 167       dir = dir == LEFT ? RIGHT : LEFT;
 168       sprite->set_action(dir == LEFT ? "left" : "right");
 169       physic.set_velocity_x(-physic.get_velocity_x());
 170       break;
 171
 172     case STATE_FLAT:
 173     case STATE_KICKED_DELAY:
 174       physic.set_velocity_x(0);
 175       break;
 176
 177     case STATE_KICKED: {
 178       sound_manager->play("sounds/iceblock_bump.wav", get_pos());
 179
 180       // open bonusblocks, crash bricks
 181       BonusBlock* bonusblock = dynamic_cast<BonusBlock*> (&object);
 182       if(bonusblock) {
 183         bonusblock->try_open();
 184       }
 185       Brick* brick = dynamic_cast<Brick*> (&object);
 186       if(brick) {
 187         brick->try_break();
 188       }
 189
 190       dir = (dir == LEFT) ? RIGHT : LEFT;
 191       sprite->set_action(dir == LEFT ? "flat-left" : "flat-right");
 192
 193       physic.set_velocity_x(-physic.get_velocity_x()*0.75);
 194       if (fabsf(physic.get_velocity_x()) < WALKSPEED) be_normal();
 195       break;
 196
 197     }
 198   }
 199
 200   return CONTINUE;
 201 }
 202
 203 HitResponse
 204 Snail::collision_badguy(BadGuy& badguy, const CollisionHit& hit)
 205 {
 206   switch(state) {
 207     case STATE_NORMAL:
 208       if(fabsf(hit.normal.x) > .5) {
 209         dir = (dir == LEFT) ? RIGHT : LEFT;
 210         sprite->set_action(dir == LEFT ? "left" : "right");
 211         physic.set_velocity_x(-physic.get_velocity_x());
 212       }
 213       return CONTINUE;
 214     case STATE_FLAT:
 215     case STATE_KICKED_DELAY:
 216       return FORCE_MOVE;
 217     case STATE_KICKED:
 218       badguy.kill_fall();
 219       return FORCE_MOVE;
 220     default:
 221       assert(false);
 222   }
 223
 224   return ABORT_MOVE;
 225 }
 226
 227 bool
 228 Snail::collision_squished(Player& player)
 229 {
 230   switch(state) {
 231
 232     case STATE_KICKED:
 233     case STATE_NORMAL:
 234       squishcount++;
 235       if(squishcount >= MAXSQUISHES) {
 236         kill_fall();
 237         return true;
 238       }
 239
 240       sound_manager->play("sounds/stomp.wav", get_pos());
 241       be_flat();
 242       break;
 243
 244     case STATE_FLAT:
 245       sound_manager->play("sounds/kick.wav", get_pos());
 246
 247       if(player.get_pos().x < get_pos().x) {
 248         dir = RIGHT;
 249       } else {
 250         dir = LEFT;
 251       }
 252       be_kicked();
 253       break;
 254
 255     case STATE_KICKED_DELAY:
 256       break;
 257
 258   }
 259
 260   player.bounce(*this);
 261   return true;
 262 }
 263
 264 IMPLEMENT_FACTORY(Snail, "snail")