00001 // SuperTux 00002 // Copyright (C) 2009 Ingo Ruhnke <grumbel@gmx.de> 00003 // 00004 // This program is free software: you can redistribute it and/or modify 00005 // it under the terms of the GNU General Public License as published by 00006 // the Free Software Foundation, either version 3 of the License, or 00007 // (at your option) any later version. 00008 // 00009 // This program is distributed in the hope that it will be useful, 00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 // GNU General Public License for more details. 00013 // 00014 // You should have received a copy of the GNU General Public License 00015 // along with this program. If not, see <http://www.gnu.org/licenses/>. 00016 00017 #include "object/ghost_particle_system.hpp" 00018 00019 #include <math.h> 00020 00021 #include "math/random_generator.hpp" 00022 #include "supertux/globals.hpp" 00023 #include "video/drawing_context.hpp" 00024 00025 //FIXME: Sometimes both ghosts have the same image 00026 // Ghosts don't change their movement pattern - not random 00027 GhostParticleSystem::GhostParticleSystem() 00028 { 00029 ghosts[0] = Surface::create("images/objects/particles/ghost0.png"); 00030 ghosts[1] = Surface::create("images/objects/particles/ghost1.png"); 00031 00032 virtual_width = SCREEN_WIDTH * 2; 00033 00034 // create two ghosts 00035 size_t ghostcount = 2; 00036 for(size_t i=0; i<ghostcount; ++i) { 00037 GhostParticle* particle = new GhostParticle; 00038 particle->pos.x = graphicsRandom.randf(virtual_width); 00039 particle->pos.y = graphicsRandom.randf(SCREEN_HEIGHT); 00040 int size = graphicsRandom.rand(2); 00041 particle->texture = ghosts[size]; 00042 particle->speed = graphicsRandom.randf(std::max(50, (size * 10)), 180 + (size * 10)); 00043 particles.push_back(particle); 00044 } 00045 } 00046 00047 void 00048 GhostParticleSystem::parse(const Reader& reader) 00049 { 00050 z_pos = reader_get_layer (reader, /* default = */ LAYER_BACKGROUND1); 00051 } 00052 00053 GhostParticleSystem::~GhostParticleSystem() 00054 { 00055 } 00056 00057 void GhostParticleSystem::update(float elapsed_time) 00058 { 00059 std::vector<Particle*>::iterator i; 00060 for(i = particles.begin(); i != particles.end(); ++i) { 00061 GhostParticle* particle = (GhostParticle*) *i; 00062 particle->pos.y -= particle->speed * elapsed_time; 00063 particle->pos.x -= particle->speed * elapsed_time; 00064 if(particle->pos.y > SCREEN_HEIGHT) { 00065 particle->pos.y = fmodf(particle->pos.y , virtual_height); 00066 particle->pos.x = graphicsRandom.rand(static_cast<int>(virtual_width)); 00067 } 00068 } 00069 } 00070 00071 /* EOF */