1 // SuperTux - Unstable Tile
2 // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
3 // Copyright (C) 2006 Christoph Sommer <christoph.sommer@2006.expires.deltadevelopment.de>
4 // Copyright (C) 2010 Florian Forster <supertux at octo.it>
6 // This program is free software: you can redistribute it and/or modify
7 // it under the terms of the GNU General Public License as published by
8 // the Free Software Foundation, either version 3 of the License, or
9 // (at your option) any later version.
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.
16 // You should have received a copy of the GNU General Public License
17 // along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include "object/unstable_tile.hpp"
21 #include "object/explosion.hpp"
22 #include "object/player.hpp"
23 #include "sprite/sprite.hpp"
24 #include "supertux/constants.hpp"
25 #include "supertux/object_factory.hpp"
27 UnstableTile::UnstableTile(const Reader& lisp) :
28 MovingSprite(lisp, LAYER_TILES, COLGROUP_STATIC),
33 sprite->set_action("normal");
34 physic.set_gravity_modifier (.98);
35 physic.enable_gravity (false);
39 UnstableTile::collision(GameObject& other, const CollisionHit& )
41 if(state == STATE_NORMAL) {
42 Player* player = dynamic_cast<Player*> (&other);
44 player->get_bbox().get_bottom() < get_bbox().get_top() + SHIFT_DELTA) {
48 if (dynamic_cast<Explosion*> (&other)) {
55 void UnstableTile::shake (void)
57 if (state != STATE_NORMAL)
60 if (sprite->has_action ("shake")) {
62 this->set_action ("shake", /* loops = */ 1);
69 void UnstableTile::dissolve (void)
71 if ((state != STATE_NORMAL) && (state != STATE_SHAKE))
74 if (sprite->has_action ("dissolve")) {
75 state = STATE_DISSOLVE;
76 this->set_action ("dissolve", /* loops = */ 1);
83 void UnstableTile::slow_fall (void)
85 /* Only enter slow-fall if neither shake nor dissolve is available. */
86 if (state != STATE_NORMAL) {
91 if (sprite->has_action ("fall-down")) {
92 state = STATE_SLOWFALL;
93 this->set_action ("fall-down", /* loops = */ 1);
94 physic.set_gravity_modifier (.10);
95 physic.enable_gravity (true);
96 slowfall_timer = 0.5; /* Fall slowly for half a second. */
103 void UnstableTile::fall_down (void)
105 if ((state != STATE_NORMAL)
106 && (state != STATE_SHAKE)
107 && (state != STATE_DISSOLVE)
108 && (state != STATE_SLOWFALL))
111 if (sprite->has_action ("fall-down")) {
113 this->set_action ("fall-down", /* loops = */ 1);
114 physic.set_gravity_modifier (.98);
115 physic.enable_gravity (true);
123 UnstableTile::update(float elapsed_time)
131 if (sprite->animation_done())
136 if (sprite->animation_done()) {
137 /* dissolving is done. Set to non-solid. */
138 set_group (COLGROUP_DISABLED);
144 if (slowfall_timer >= elapsed_time)
145 slowfall_timer -= elapsed_time;
146 else /* Switch to normal falling procedure */
148 movement = physic.get_movement (elapsed_time);
152 if (sprite->animation_done())
155 movement = physic.get_movement (elapsed_time);