RainParticleSystem Class Reference

#include <rain_particle_system.hpp>

Inherits ParticleSystem_Interactive.

List of all members.

Public Member Functions
	RainParticleSystem ()
virtual	~RainParticleSystem ()
void	parse (const Reader &lisp)
virtual void	update (float elapsed_time)
	This function is called once per frame and allows the object to update it's state.
std::string	type () const
Private Member Functions
	RainParticleSystem (const RainParticleSystem &)
RainParticleSystem &	operator= (const RainParticleSystem &)
Private Attributes
SurfacePtr	rainimages [2]
Classes
class	RainParticle

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Detailed Description

Definition at line 25 of file rain_particle_system.hpp.

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Constructor & Destructor Documentation

RainParticleSystem::RainParticleSystem

(

)

Definition at line 24 of file rain_particle_system.cpp.

References Surface::create(), graphicsRandom, ParticleSystem_Interactive::particles, rainimages, RandomGenerator::rand(), RandomGenerator::randf(), SCREEN_WIDTH, ParticleSystem_Interactive::virtual_height, and ParticleSystem_Interactive::virtual_width.

{
  rainimages[0] = Surface::create("images/objects/particles/rain0.png");
  rainimages[1] = Surface::create("images/objects/particles/rain1.png");

  virtual_width = SCREEN_WIDTH * 2;

  // create some random raindrops
  size_t raindropcount = size_t(virtual_width/6.0);
  for(size_t i=0; i<raindropcount; ++i) {
    RainParticle* particle = new RainParticle;
    particle->pos.x = graphicsRandom.rand(int(virtual_width));
    particle->pos.y = graphicsRandom.rand(int(virtual_height));
    int rainsize = graphicsRandom.rand(2);
    particle->texture = rainimages[rainsize];
    do {
      particle->speed = (rainsize+1)*45 + graphicsRandom.randf(3.6);
    } while(particle->speed < 1);
    particle->speed *= 10; // gravity

    particles.push_back(particle);
  }
}

RainParticleSystem::~RainParticleSystem

(

)

[virtual]

Definition at line 54 of file rain_particle_system.cpp.

{
}

RainParticleSystem::RainParticleSystem

(

const RainParticleSystem &

)

[private]

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Member Function Documentation

void RainParticleSystem::parse

(

const Reader &

lisp

)

Definition at line 49 of file rain_particle_system.cpp.

References LAYER_BACKGROUND1, reader_get_layer(), and ParticleSystem_Interactive::z_pos.

Referenced by Sector::parse_object().

{
  z_pos = reader_get_layer (reader, /* default = */ LAYER_BACKGROUND1);
}

void RainParticleSystem::update

(

float

elapsed_time

)

[virtual]

This function is called once per frame and allows the object to update it's state.

The elapsed_time is the time since the last frame in seconds and should be the base for all timed calculations (don't use SDL_GetTicks directly as this will fail in pause mode)

Implements GameObject.

Definition at line 58 of file rain_particle_system.cpp.

References Sector::add_object(), Sector::camera, ParticleSystem_Interactive::collision(), Sector::current(), Camera::get_translation(), graphicsRandom, ParticleSystem_Interactive::particles, RandomGenerator::rand(), SCREEN_HEIGHT, ParticleSystem_Interactive::virtual_width, Vector::x, and Vector::y.

{
  std::vector<Particle*>::iterator i;
  for(
    i = particles.begin(); i != particles.end(); ++i) {
    RainParticle* particle = (RainParticle*) *i;
    float movement = particle->speed * elapsed_time;
    float abs_x = Sector::current()->camera->get_translation().x;
    float abs_y = Sector::current()->camera->get_translation().y;
    particle->pos.y += movement;
    particle->pos.x -= movement;
    int col = collision(particle, Vector(-movement, movement));
    if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
      //Create rainsplash
      if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)){
        bool vertical = (col == 2);
        int splash_x, splash_y;
        if (!vertical) { //check if collision happened from above
          splash_x = int(particle->pos.x);
          splash_y = int(particle->pos.y) - (int(particle->pos.y) % 32) + 32;
          Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
        }
        // Uncomment the following to display vertical splashes, too
        /* else {
           splash_x = int(particle->pos.x) - (int(particle->pos.x) % 32) + 32;
           splash_y = int(particle->pos.y);
           Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
           } */
      }
      int new_x = graphicsRandom.rand(int(virtual_width)) + int(abs_x);
      int new_y = 0;
      //FIXME: Don't move particles over solid tiles
      particle->pos.x = new_x;
      particle->pos.y = new_y;
    }
  }
}

std::string RainParticleSystem::type

(

)

const [inline]

Definition at line 35 of file rain_particle_system.hpp.

  { return "RainParticleSystem"; }

RainParticleSystem& RainParticleSystem::operator=

(

const RainParticleSystem &

)

[private]

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Member Data Documentation

SurfacePtr RainParticleSystem::rainimages[2] [private]

Definition at line 49 of file rain_particle_system.hpp.

Referenced by RainParticleSystem().

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The documentation for this class was generated from the following files:

• src/object/rain_particle_system.hpp
• src/object/rain_particle_system.cpp

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