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   sound_manager->preload("sounds/iceblock_bump.wav");
  36   sound_manager->preload("sounds/stomp.wav");
  37   sound_manager->preload("sounds/kick.wav");
  38   recently_changed_direction = false;
  39 }
  40
  41 Snail::Snail(const Vector& pos, Direction d)
  42   : BadGuy(pos, d, "images/creatures/snail/snail.sprite"), state(STATE_NORMAL), squishcount(0)
  43 {
  44   sound_manager->preload("sounds/iceblock_bump.wav");
  45   sound_manager->preload("sounds/stomp.wav");
  46   sound_manager->preload("sounds/kick.wav");
  47   recently_changed_direction = false;
  48 }
  49
  50 void
  51 Snail::write(lisp::Writer& writer)
  52 {
  53   writer.start_list("snail");
  54
  55   writer.write_float("x", start_position.x);
  56   writer.write_float("y", start_position.y);
  57
  58   writer.end_list("snail");
  59 }
  60
  61 void
  62 Snail::activate()
  63 {
  64   be_normal();
  65 }
  66
  67 void
  68 Snail::be_normal()
  69 {
  70   state = STATE_NORMAL;
  71   sprite->set_action(dir == LEFT ? "left" : "right");
  72
  73   physic.set_velocity_x(dir == LEFT ? -WALKSPEED : WALKSPEED);
  74 }
  75
  76 void
  77 Snail::be_flat()
  78 {
  79   state = STATE_FLAT;
  80   sprite->set_action(dir == LEFT ? "flat-left" : "flat-right");
  81   sprite->set_fps(64);
  82
  83   physic.set_velocity_x(0);
  84   physic.set_velocity_y(0);
  85
  86   flat_timer.start(4);
  87 }
  88
  89 void
  90 Snail::be_kicked()
  91 {
  92   state = STATE_KICKED_DELAY;
  93   sprite->set_action(dir == LEFT ? "flat-left" : "flat-right");
  94   sprite->set_fps(64);
  95
  96   physic.set_velocity_x(0);
  97   physic.set_velocity_y(0);
  98
  99   // start a timer to delay addition of upward movement until we are (hopefully) out from under the player
 100   kicked_delay_timer.start(0.05);
 101 }
 102
 103
 104 void
 105 Snail::active_update(float elapsed_time)
 106 {
 107   recently_changed_direction = false;
 108   switch (state) {
 109
 110     case STATE_NORMAL:
 111       if (on_ground() && might_fall(601)) {
 112         if( recently_changed_direction ) break;
 113         recently_changed_direction = true;
 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 void
 147 Snail::collision_solid(const CollisionHit& hit)
 148 {
 149   update_on_ground_flag(hit);
 150
 151   if(hit.top || hit.bottom) { // floor or roof
 152     physic.set_velocity_y(0);
 153
 154     switch (state) {
 155       case STATE_NORMAL:
 156       case STATE_FLAT:
 157       case STATE_KICKED_DELAY:
 158         break;
 159       case STATE_KICKED:
 160         break;
 161     }
 162
 163     return;
 164   }
 165   // hit left or right
 166   switch(state) {
 167
 168     case STATE_NORMAL:
 169       if( recently_changed_direction ) break;
 170       recently_changed_direction = true;
 171       dir = dir == LEFT ? RIGHT : LEFT;
 172       sprite->set_action(dir == LEFT ? "left" : "right");
 173       physic.set_velocity_x(-physic.get_velocity_x());
 174       break;
 175
 176     case STATE_FLAT:
 177     case STATE_KICKED_DELAY:
 178       physic.set_velocity_x(0);
 179       break;
 180
 181     case STATE_KICKED: {
 182       sound_manager->play("sounds/iceblock_bump.wav", get_pos());
 183
 184 #if 0
 185       // TODO move this into BonusBlock code
 186       // open bonusblocks, crash bricks
 187       BonusBlock* bonusblock = dynamic_cast<BonusBlock*> (&object);
 188       if(bonusblock) {
 189         bonusblock->try_open();
 190       }
 191       Brick* brick = dynamic_cast<Brick*> (&object);
 192       if(brick) {
 193         brick->try_break();
 194       }
 195 #endif
 196       if( recently_changed_direction ) break;
 197       recently_changed_direction = true;
 198       dir = (dir == LEFT) ? RIGHT : LEFT;
 199       sprite->set_action(dir == LEFT ? "flat-left" : "flat-right");
 200
 201       physic.set_velocity_x(-physic.get_velocity_x()*0.75);
 202       if (fabsf(physic.get_velocity_x()) < WALKSPEED) be_normal();
 203       break;
 204
 205     }
 206   }
 207 }
 208
 209 HitResponse
 210 Snail::collision_badguy(BadGuy& badguy, const CollisionHit& hit)
 211 {
 212   switch(state) {
 213     case STATE_NORMAL:
 214       if(hit.left || hit.right) {
 215         if( recently_changed_direction ) return CONTINUE;
 216         recently_changed_direction = true;
 217         dir = (dir == LEFT) ? RIGHT : LEFT;
 218         sprite->set_action(dir == LEFT ? "left" : "right");
 219         physic.set_velocity_x(-physic.get_velocity_x());
 220       }
 221       return CONTINUE;
 222     case STATE_FLAT:
 223     case STATE_KICKED_DELAY:
 224       return FORCE_MOVE;
 225     case STATE_KICKED:
 226       badguy.kill_fall();
 227       return FORCE_MOVE;
 228     default:
 229       assert(false);
 230   }
 231
 232   return ABORT_MOVE;
 233 }
 234
 235 bool
 236 Snail::collision_squished(Player& player)
 237 {
 238   switch(state) {
 239
 240     case STATE_KICKED:
 241     case STATE_NORMAL:
 242       squishcount++;
 243       if(squishcount >= MAXSQUISHES) {
 244         kill_fall();
 245         return true;
 246       }
 247
 248       sound_manager->play("sounds/stomp.wav", get_pos());
 249       be_flat();
 250       break;
 251
 252     case STATE_FLAT:
 253       sound_manager->play("sounds/kick.wav", get_pos());
 254
 255       if(player.get_pos().x < get_pos().x) {
 256         dir = RIGHT;
 257       } else {
 258         dir = LEFT;
 259       }
 260       be_kicked();
 261       break;
 262
 263     case STATE_KICKED_DELAY:
 264       break;
 265
 266   }
 267
 268   player.bounce(*this);
 269   return true;
 270 }
 271
 272 IMPLEMENT_FACTORY(Snail, "snail")