3 // SuperTux - Trampoline
4 // Copyright (C) 2006 Wolfgang Becker <uafr@gmx.de>
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.
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, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 #include "trampoline.hpp"
23 #include "object_factory.hpp"
25 #include "audio/sound_manager.hpp"
26 #include "sprite/sprite_manager.hpp"
28 /* Trampoline will accelerate player by VY_FACTOR (or to VY_INITIAL if
29 * that's faster) if he jumps on it. Acceleration is capped at VY_MIN. */
31 static const std::string TRAMPOLINE_SOUND = "sounds/trampoline.wav";
32 static const float VY_MIN = -1000; //negative, upwards
33 static const float VY_FACTOR = -1.5;
34 static const float VY_INITIAL = -500;
37 Trampoline::Trampoline(const lisp::Lisp& lisp)
38 : MovingSprite(lisp, "images/objects/trampoline/trampoline.sprite" )
40 sound_manager->preload( TRAMPOLINE_SOUND );
41 flags |= FLAG_PORTABLE;
42 physic.set_velocity_y(0);
43 physic.enable_gravity(true);
46 //Check if we need another sprite
47 if( !lisp.get( "sprite", sprite_name ) ){
50 if( sprite_name == "" ){
51 sprite_name = "images/objects/trampoline/trampoline.sprite";
55 sprite = sprite_manager->create( sprite_name );
60 Trampoline::update( float elapsed_time ){
62 movement = physic.get_movement(elapsed_time);
67 Trampoline::collision(GameObject& other, const CollisionHit& hit )
69 Player* player = dynamic_cast<Player*> (&other);
71 float vy = player->physic.get_velocity_y();
72 //player is falling down on trampolin holding "jump"
73 if( hit.top && vy > 0 && player->get_controller()->hold( Controller::JUMP )){
78 if( vy > VY_INITIAL ){
81 player->physic.set_velocity_y( vy );
82 //printf("nachher velocity y = %f\n", player->physic.get_velocity_y());
83 sound_manager->play( TRAMPOLINE_SOUND );
88 return SOLID; //TODO: Nobody should be able to walk through the trampoline.
92 Trampoline::collision_solid( const CollisionHit& hit ){
99 Trampoline::grab( MovingObject&, const Vector& pos, Direction ){
100 movement = pos - get_pos();
101 set_group( COLGROUP_DISABLED );
106 Trampoline::ungrab(MovingObject& , Direction ){
107 set_group( COLGROUP_MOVING );
109 physic.set_velocity_y(0);
113 IMPLEMENT_FACTORY(Trampoline, "trampoline");