source: orxonox.OLD/branches/terrain.older/src/lib/graphics/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 "util/loading/resource_manager.h"

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

#include "p_node.h"
#include "state.h"
#include "sprite_particles.h"
#include "plane_emitter.h"
#include "shell_command.h"
#include "script_class.h"

#include "parser/tinyxml/tinyxml.h"

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

using namespace std;

CREATE_SCRIPTABLE_CLASS(SnowEffect, CL_SNOW_EFFECT,
                            addMethod("activate", ExecutorLua0<SnowEffect>(&SnowEffect::activate))
                            ->addMethod("deactivate", ExecutorLua0<SnowEffect>(&SnowEffect::deactivate))
                       );

CREATE_FACTORY(SnowEffect, CL_SNOW_EFFECT);

SnowEffect::SnowEffect(const TiXmlElement* root)
{
        this->setClassID(CL_SNOW_EFFECT, "SnowEffect");

        this->init();

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

        //load wind sound
        if (this->snowWindForce > 1) {
                if (this->windBuffer != NULL)
                        ResourceManager::getInstance()->unload(this->windBuffer);
                        this->windBuffer = (OrxSound::SoundBuffer*)ResourceManager::getInstance()->load("sound/atmosphere/wind.wav", 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);

        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;
}

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);

}


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

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

        if (this->windBuffer != NULL)
                ResourceManager::getInstance()->unload(this->windBuffer);
}

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);
        }
}