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   reader.get("direction", direction);
  36   set_direction = false;
  37   if( direction != "auto" && direction != ""){
  38     set_direction = true;
  39     initial_direction = str2dir( direction );
  40   }
  41   sound_manager->preload("sounds/iceblock_bump.wav");
  42   sound_manager->preload("sounds/stomp.wav");
  43   sound_manager->preload("sounds/kick.wav");
  44 }
  45
  46 Snail::Snail(const Vector& pos, Direction d)
  47   : BadGuy(pos, "images/creatures/snail/snail.sprite"), state(STATE_NORMAL), squishcount(0)
  48 {
  49   set_direction = true;
  50   initial_direction = d;
  51   sound_manager->preload("sounds/iceblock_bump.wav");
  52   sound_manager->preload("sounds/stomp.wav");
  53   sound_manager->preload("sounds/kick.wav");
  54 }
  55
  56 void
  57 Snail::write(lisp::Writer& writer)
  58 {
  59   writer.start_list("snail");
  60
  61   writer.write_string("direction", direction);
  62   writer.write_float("x", start_position.x);
  63   writer.write_float("y", start_position.y);
  64
  65   writer.end_list("snail");
  66 }
  67
  68 void
  69 Snail::activate()
  70 {
  71   if (set_direction) {dir = initial_direction;}
  72
  73   be_normal();
  74 }
  75
  76 void
  77 Snail::be_normal()
  78 {
  79   state = STATE_NORMAL;
  80   sprite->set_action(dir == LEFT ? "left" : "right");
  81
  82   physic.set_velocity_x(dir == LEFT ? -WALKSPEED : WALKSPEED);
  83 }
  84
  85 void
  86 Snail::be_flat()
  87 {
  88   state = STATE_FLAT;
  89   sprite->set_action(dir == LEFT ? "flat-left" : "flat-right");
  90   sprite->set_fps(64);
  91
  92   physic.set_velocity_x(0);
  93   physic.set_velocity_y(0);
  94
  95   flat_timer.start(4);
  96 }
  97
  98 void
  99 Snail::be_kicked()
 100 {
 101   state = STATE_KICKED_DELAY;
 102   sprite->set_action(dir == LEFT ? "flat-left" : "flat-right");
 103   sprite->set_fps(64);
 104
 105   physic.set_velocity_x(0);
 106   physic.set_velocity_y(0);
 107
 108   // start a timer to delay addition of upward movement until we are (hopefully) out from under the player
 109   kicked_delay_timer.start(0.05);
 110 }
 111
 112
 113 void
 114 Snail::active_update(float elapsed_time)
 115 {
 116   switch (state) {
 117
 118     case STATE_NORMAL:
 119       if (might_fall(601)) {
 120         dir = (dir == LEFT ? RIGHT : LEFT);
 121         sprite->set_action(dir == LEFT ? "left" : "right");
 122         physic.set_velocity_x(-physic.get_velocity_x());
 123       }
 124       break;
 125
 126     case STATE_FLAT:
 127       if (flat_timer.started()) {
 128         sprite->set_fps(64 - 15 * flat_timer.get_timegone());
 129       }
 130       if (flat_timer.check()) {
 131         be_normal();
 132       }
 133       break;
 134
 135     case STATE_KICKED_DELAY:
 136       if (kicked_delay_timer.check()) {
 137         physic.set_velocity_x(dir == LEFT ? -KICKSPEED : KICKSPEED);
 138         physic.set_velocity_y(KICKSPEED_Y);
 139         state = STATE_KICKED;
 140       }
 141       break;
 142
 143     case STATE_KICKED:
 144       physic.set_velocity_x(physic.get_velocity_x() * pow(0.99, elapsed_time/0.02));
 145       if (fabsf(physic.get_velocity_x()) < WALKSPEED) be_normal();
 146       break;
 147
 148   }
 149   BadGuy::active_update(elapsed_time);
 150 }
 151
 152 HitResponse
 153 Snail::collision_solid(GameObject& object, const CollisionHit& hit)
 154 {
 155   if(fabsf(hit.normal.y) > .5) { // floor or roof
 156     physic.set_velocity_y(0);
 157
 158     switch (state) {
 159       case STATE_NORMAL:
 160       case STATE_FLAT:
 161       case STATE_KICKED_DELAY:
 162         break;
 163       case STATE_KICKED:
 164         break;
 165     }
 166
 167     return CONTINUE;
 168   }
 169   // hit left or right
 170   switch(state) {
 171
 172     case STATE_NORMAL:
 173       dir = dir == LEFT ? RIGHT : LEFT;
 174       sprite->set_action(dir == LEFT ? "left" : "right");
 175       physic.set_velocity_x(-physic.get_velocity_x());
 176       break;
 177
 178     case STATE_FLAT:
 179     case STATE_KICKED_DELAY:
 180       physic.set_velocity_x(0);
 181       break;
 182
 183     case STATE_KICKED: {
 184       sound_manager->play("sounds/iceblock_bump.wav", get_pos());
 185
 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
 196       dir = (dir == LEFT) ? RIGHT : LEFT;
 197       sprite->set_action(dir == LEFT ? "flat-left" : "flat-right");
 198
 199       physic.set_velocity_x(-physic.get_velocity_x()*0.75);
 200       if (fabsf(physic.get_velocity_x()) < WALKSPEED) be_normal();
 201       break;
 202
 203     }
 204   }
 205
 206   return CONTINUE;
 207 }
 208
 209 HitResponse
 210 Snail::collision_badguy(BadGuy& badguy, const CollisionHit& hit)
 211 {
 212   switch(state) {
 213     case STATE_NORMAL:
 214       if(fabsf(hit.normal.x) > .5) {
 215         dir = (dir == LEFT) ? RIGHT : LEFT;
 216         sprite->set_action(dir == LEFT ? "left" : "right");
 217         physic.set_velocity_x(-physic.get_velocity_x());
 218       }
 219       return CONTINUE;
 220     case STATE_FLAT:
 221     case STATE_KICKED_DELAY:
 222       return FORCE_MOVE;
 223     case STATE_KICKED:
 224       badguy.kill_fall();
 225       return FORCE_MOVE;
 226     default:
 227       assert(false);
 228   }
 229
 230   return ABORT_MOVE;
 231 }
 232
 233 bool
 234 Snail::collision_squished(Player& player)
 235 {
 236   switch(state) {
 237
 238     case STATE_KICKED:
 239     case STATE_NORMAL:
 240       squishcount++;
 241       if(squishcount >= MAXSQUISHES) {
 242         kill_fall();
 243         return true;
 244       }
 245
 246       sound_manager->play("sounds/stomp.wav", get_pos());
 247       be_flat();
 248       break;
 249
 250     case STATE_FLAT:
 251       sound_manager->play("sounds/kick.wav", get_pos());
 252
 253       if(player.get_pos().x < get_pos().x) {
 254         dir = RIGHT;
 255       } else {
 256         dir = LEFT;
 257       }
 258       be_kicked();
 259       break;
 260
 261     case STATE_KICKED_DELAY:
 262       break;
 263
 264   }
 265
 266   player.bounce(*this);
 267   return true;
 268 }
 269
 270 IMPLEMENT_FACTORY(Snail, "snail")