-SnowParticleSystem::SnowParticleSystem()
-{
- snowimages[0] = new Surface("images/objects/particles/snow2.png");
- snowimages[1] = new Surface("images/objects/particles/snow1.png");
- snowimages[2] = new Surface("images/objects/particles/snow0.png");
-
- virtual_width = SCREEN_WIDTH * 2;
-
- // create some random snowflakes
- size_t snowflakecount = size_t(virtual_width/10.0);
- for(size_t i=0; i<snowflakecount; ++i) {
- SnowParticle* particle = new SnowParticle;
- int snowsize = systemRandom.rand(3);
-
- particle->pos.x = systemRandom.randf(virtual_width);
- particle->pos.y = systemRandom.randf(SCREEN_HEIGHT);
- particle->anchorx = particle->pos.x + (systemRandom.randf(-0.5, 0.5) * 16);
- particle->drift_speed = systemRandom.randf(-0.5, 0.5) * 0.3;
- particle->wobble = 0.0;
-
- particle->texture = snowimages[snowsize];
-
- particle->speed = 1 + (2 - snowsize)/2 + systemRandom.randf(1.8);
- particle->speed *= 20; // gravity
-
- particles.push_back(particle);
- }
-}
-
-void
-SnowParticleSystem::parse(const lisp::Lisp& reader)
-{
- reader.get("z-pos", z_pos);
-}
-
-void
-SnowParticleSystem::write(lisp::Writer& writer)
-{
- writer.start_list("particles-snow");
- writer.write_int("z-pos", z_pos);
- writer.end_list("particles-snow");
-}
-
-SnowParticleSystem::~SnowParticleSystem()
-{
- for(int i=0;i<3;++i)
- delete snowimages[i];
-}
-
-void SnowParticleSystem::update(float elapsed_time)
-{
- std::vector<Particle*>::iterator i;
-
- for(i = particles.begin(); i != particles.end(); ++i) {
- SnowParticle* particle = (SnowParticle*) *i;
- float anchor_delta;
-
- particle->pos.y += particle->speed * elapsed_time;
- particle->pos.x += particle->wobble * elapsed_time /* * particle->speed * 0.125*/;
-
- anchor_delta = (particle->anchorx - particle->pos.x);
- particle->wobble += (4 * anchor_delta * 0.05) + systemRandom.randf(-0.5, 0.5);
- particle->wobble *= 0.99;
- particle->anchorx += particle->drift_speed * elapsed_time;
- }
-}
-
-//FIXME: Sometimes both ghosts have the same image
-// Ghosts don't change their movement pattern - not random
-GhostParticleSystem::GhostParticleSystem()
-{
- ghosts[0] = new Surface("images/objects/particles/ghost0.png");
- ghosts[1] = new Surface("images/objects/particles/ghost1.png");
-
- virtual_width = SCREEN_WIDTH * 2;
-
- // create two ghosts
- size_t ghostcount = 2;
- for(size_t i=0; i<ghostcount; ++i) {
- GhostParticle* particle = new GhostParticle;
- particle->pos.x = systemRandom.randf(virtual_width);
- particle->pos.y = systemRandom.randf(SCREEN_HEIGHT);
- int size = systemRandom.rand(2);
- particle->texture = ghosts[size];
- do {
- particle->speed = size*.2 + systemRandom.randf(3.6);
- } while(particle->speed < 1);
- particle->speed *= 50;
- particles.push_back(particle);
- }
-}
-
-void
-GhostParticleSystem::parse(const lisp::Lisp& reader)
-{
- reader.get("z-pos", z_pos);
-}
-
-void
-GhostParticleSystem::write(lisp::Writer& writer)
-{
- writer.start_list("particles-ghosts");
- writer.write_int("z-pos", z_pos);
- writer.end_list("particles-ghosts");
-}
-
-GhostParticleSystem::~GhostParticleSystem()
-{
- for(int i=0;i<2;++i)
- delete ghosts[i];
-}
-
-void GhostParticleSystem::update(float elapsed_time)
-{
- std::vector<Particle*>::iterator i;
- for(i = particles.begin(); i != particles.end(); ++i) {
- GhostParticle* particle = (GhostParticle*) *i;
- particle->pos.y -= particle->speed * elapsed_time;
- particle->pos.x -= particle->speed * elapsed_time;
- if(particle->pos.y > SCREEN_HEIGHT) {
- particle->pos.y = fmodf(particle->pos.y , virtual_height);
- particle->pos.x = systemRandom.rand(static_cast<int>(virtual_width));
- }
- }
-}
-
-CloudParticleSystem::CloudParticleSystem()
- : ParticleSystem(128)
-{
- cloudimage = new Surface("images/objects/particles/cloud.png");
-
- virtual_width = 2000.0;
-
- // create some random clouds
- for(size_t i=0; i<15; ++i) {
- CloudParticle* particle = new CloudParticle;
- particle->pos.x = systemRandom.rand(static_cast<int>(virtual_width));
- particle->pos.y = systemRandom.rand(static_cast<int>(virtual_height));
- particle->texture = cloudimage;
- particle->speed = -systemRandom.randf(25.0, 54.0);
-
- particles.push_back(particle);
- }
-}
-
-void
-CloudParticleSystem::parse(const lisp::Lisp& reader)
-{
- reader.get("z-pos", z_pos);
-}
-
-void
-CloudParticleSystem::write(lisp::Writer& writer)
-{
- writer.start_list("particles-clouds");
- writer.write_int("z-pos", z_pos);
- writer.end_list("particles-clouds");
-}
-
-CloudParticleSystem::~CloudParticleSystem()
-{
- delete cloudimage;
-}
-
-void CloudParticleSystem::update(float elapsed_time)
-{
- std::vector<Particle*>::iterator i;
- for(i = particles.begin(); i != particles.end(); ++i) {
- CloudParticle* particle = (CloudParticle*) *i;
- particle->pos.x += particle->speed * elapsed_time;
- }
-}