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