source: orxonox.OLD/branches/ODE/src/world_entities/weather_effects/snow_effect.cc

/*
        orxonox - the future of 3D-vertical-scrollers

        Copyright (C) 2004 orx

        This program is free software; you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation; either version 2, or (at your option)
        any later version.

### File Specific:
        main-programmer: hdavid, amaechler
*/

#include "snow_effect.h"

#include "util/loading/load_param.h"
#include "util/loading/factory.h"
#include "sound/resource_sound_buffer.h"

#include "glincl.h"
#include "debug.h"

#include "p_node.h"
#include "state.h"
#include "particles/sprite_particles.h"
#include "particles/plane_emitter.h"
#include "shell_command.h"
#include "script_class.h"
#include "cloud_effect.h"



ObjectListDefinition(SnowEffect);
SHELL_COMMAND(activate, SnowEffect, activateSnow);
SHELL_COMMAND(deactivate, SnowEffect, deactivateSnow);


CREATE_SCRIPTABLE_CLASS(SnowEffect,
                        addMethod("activate", Executor0<SnowEffect, lua_State*>(&SnowEffect::activate))
                        ->addMethod("deactivate", Executor0<SnowEffect, lua_State*>(&SnowEffect::deactivate))
                       );

CREATE_FACTORY(SnowEffect);

SnowEffect::SnowEffect(const TiXmlElement* root)
{
  this->registerObject(this, SnowEffect::_objectList);

  this->init();

  if (root != NULL)
    this->loadParams(root);

  //load wind sound
  if (this->snowWindForce >= 1)
  {
    this->windBuffer = OrxSound::ResourceSoundBuffer("sound/atmosphere/wind.wav");
  }

  if(snowActivate)
  {
    this->activate();
    SnowEffect::snowParticles->precache((int) this->snowLife);
  }
}


SnowEffect::~SnowEffect()
{
  this->deactivate();
}

SpriteParticles* SnowEffect::snowParticles = NULL;

void SnowEffect::loadParams(const TiXmlElement* root)
{
  WeatherEffect::loadParams(root);

  LoadParam(root, "numParticles", this, SnowEffect, numParticles);
  LoadParam(root, "materialTexture", this, SnowEffect, materialTexture);
  LoadParam(root, "lifeSpans", this, SnowEffect, lifeSpan);
  LoadParam(root, "radius", this, SnowEffect, radius);
  LoadParam(root, "mass", this, SnowEffect, mass);
  LoadParam(root, "emissionRate", this, SnowEffect, emissionRate);
  LoadParam(root, "emissionVelocity", this, SnowEffect, emissionVelocity);
  LoadParam(root, "wind", this, SnowEffect, wind);
  LoadParam(root, "size", this, SnowEffect, size);
  LoadParam(root, "coord", this, SnowEffect, coord);
  LoadParam(root, "cloudcolor", this, SnowEffect, setCloudColor);
  LoadParam(root, "skycolor", this, SnowEffect, setSkyColor);
  LoadParam(root, "fadetime", this, SnowEffect, setFadeTime);

  LOAD_PARAM_START_CYCLE(root, element);
  {
    LoadParam_CYCLE(element, "option", this, SnowEffect, setSnowOption);
  }
  LOAD_PARAM_END_CYCLE(element);
}

void SnowEffect::init()
{
  this->emitter = new PlaneEmitter();

  // Default values
  this->snowActivate = false;
  this->snowMove = false;
  this->particles = 12000;
  this->texture = "maps/snow_flake_01_32x32.png";
  this->snowLife = 8;
  this->randomLife = 2;
  this->snowRadius = 3.5;
  this->randomRadius = 1;
  this->snowMass = 1.0;
  this->randomMass = 0.3;
  this->rate = 900;
  this->velocity = -100;
  this->randomVelocity = 5;
  this->angle = 0.5;
  this->randomAngle = 0.2;
  this->alpha = 0.5;
  this->snowSize = Vector2D(2500, 2500);
  this->snowCoord = Vector(100,450,400);
  this->snowWindForce = 1;

  this->fadeTime = 10;
  this->cloudColor = Vector(0.2f, 0.2f, 0.2f);
  this->skyColor = Vector(0.0f, 0.0f, 0.0f);
}

void SnowEffect::activate()
{
  PRINTF(3)("Activating SnowEffect\n");

  this->snowActivate = true;

  SnowEffect::snowParticles = new SpriteParticles(particles);
  SnowEffect::snowParticles->setName("SnowEffectTrailParticles");
  SnowEffect::snowParticles->setMaterialTexture(texture);
  SnowEffect::snowParticles->setLifeSpan(snowLife, randomLife);
  SnowEffect::snowParticles->setRadius(0.0, snowRadius, randomRadius);
  SnowEffect::snowParticles->setRadius(0.2, snowRadius, randomRadius*0.8);
  SnowEffect::snowParticles->setRadius(1.0, snowRadius, randomRadius*0.5);
  SnowEffect::snowParticles->setMass(0, snowMass, randomMass);
  SnowEffect::snowParticles->setColor(0,1, 1, 1, alpha);
  SnowEffect::snowParticles->setColor(.5, .6, .6, .6, alpha/2);
  SnowEffect::snowParticles->setColor(1, .0, .0, .0, .0);

  this->emitter->setSystem(SnowEffect::snowParticles);

  this->emitter->setRelCoor(snowCoord);
  this->emitter->setEmissionRate(rate);
  this->emitter->setEmissionVelocity(velocity, randomVelocity);
  this->emitter->setSpread(angle * this->snowWindForce , randomAngle * this->snowWindForce);
  this->emitter->setSize(snowSize);

  if (this->snowWindForce != 0)
    this->soundSource.play(this->windBuffer, 0.1f * this->snowWindForce, true);

  // Store cloud- and sky color before the snow
  this->oldCloudColor = CloudEffect::cloudColor;
  this->oldSkyColor   = CloudEffect::skyColor;

  // Change the colors
  CloudEffect::changeCloudColor(this->cloudColor, this->fadeTime);
  CloudEffect::changeSkyColor(this->skyColor, this->fadeTime);

}


void SnowEffect::deactivate()
{
  PRINTF(3)("Deactivating SnowEffect\n");

  this->snowActivate = false;
  this->emitter->setSystem(NULL);

  // Restore the old cloud- and sky color
  CloudEffect::changeCloudColor(this->oldCloudColor, this->fadeTime);
  CloudEffect::changeSkyColor(this->oldSkyColor, this->fadeTime);
}

void SnowEffect::draw() const
{
  if (!this->snowActivate)
    return;
}

void SnowEffect::tick(float dt)
{
  if (!this->snowActivate)
    return;

  /*
  float distance = (State::getCameraNode()->getAbsCoor() - Vector(snowCoord.x, State::getCameraNode()->getAbsCoor().y, snowCoord.z)).len();

  if(activated)
  {
  if(distance > 0.3*snowSize.x || distance > 0.3*snowSize.y)
                  this->deactivate();
  else if(distance > 0.25*snowSize.x || distance > 0.25*snowSize.y)
  this->alpha = 0.15;
  else if(distance > 0.2*snowSize.x || distance > 0.2*snowSize.y)
  this->alpha = 0.25;
  else if(distance > 0.1*snowSize.x || distance > 0.1*snowSize.y)
  this->alpha = 0.4;

  SnowEffect::snowParticles->setColor(0,1, 1, 1, alpha);
  SnowEffect::snowParticles->setColor(.5, .6, .6, .6, alpha/2);
  SnowEffect::snowParticles->setColor(1, .0, .0, .0, .0);
  }
  else
  {
  if(distance < 0.3*snowSize.x || distance < 0.3*snowSize.y )
  this->activate();
  if( distance < 0.25*snowSize.x || distance < 0.25*snowSize.y )
  this->alpha = 0.25;
  else if( distance < 0.2*snowSize.x || distance < 0.2*snowSize.y )
  this->alpha = 0.4;
  else if( distance < 0.1*snowSize.x || distance < 0.1*snowSize.y )
  this->alpha = 0.5;

  SnowEffect::snowParticles->setColor(0,1, 1, 1, alpha);
  SnowEffect::snowParticles->setColor(.5, .6, .6, .6, alpha/2);
  SnowEffect::snowParticles->setColor(1, .0, .0, .0, .0);
  }*/

  if (this->snowMove)
  {
    this->snowCoord = State::getCameraNode()->getAbsCoor();
    this->emitter->setRelCoor(this->snowCoord.x , this->snowCoord.y+300, this->snowCoord.z);
  }
}