One issue on explosion demo of SPARK using Irrlicht as a renderer?

Messages: 11 Date d'inscription: 2012-03-31

Hi SPARK team,

confused

When i ported the ExplosionDemo to Irrlicht, the function "setTextureBlending()" missed, so i canceled this sentence.
"
//xxx->setTextureBlending(GL_MODULATE);
xxx->setBlending(BLENDING_ALPHA);
"

one issue occured:
I found the multi-Layers' alpha effect is wrong.

I know i should use ANOTHER setBlending() as follow:
"void IRRRenderer::setBlending(irr::video::E_BLEND_FACTOR srcFunc,irr::video::E_BLEND_FACTOR destFunc,unsigned int alphaSrc)"

not
"void IRRRenderer::setBlending(BlendingMode blendMode)"

BUT, so many enum chooses
"
enum E_BLEND_FACTOR
{
EBF_ZERO = 0, //!< src & dest (0, 0, 0, 0)
EBF_ONE, //!< src & dest (1, 1, 1, 1)
EBF_DST_COLOR, //!< src (destR, destG, destB, destA)
EBF_ONE_MINUS_DST_COLOR, //!< src (1-destR, 1-destG, 1-destB, 1-destA)
EBF_SRC_COLOR, //!< dest (srcR, srcG, srcB, srcA)
EBF_ONE_MINUS_SRC_COLOR, //!< dest (1-srcR, 1-srcG, 1-srcB, 1-srcA)
EBF_SRC_ALPHA, //!< src & dest (srcA, srcA, srcA, srcA)
EBF_ONE_MINUS_SRC_ALPHA, //!< src & dest (1-srcA, 1-srcA, 1-srcA, 1-srcA)
EBF_DST_ALPHA, //!< src & dest (destA, destA, destA, destA)
EBF_ONE_MINUS_DST_ALPHA, //!< src & dest (1-destA, 1-destA, 1-destA, 1-destA)
EBF_SRC_ALPHA_SATURATE //!< src (min(srcA, 1-destA), idem, ...)
};
"
and so many Renderer
"smokeRenderer, flameRenderer, flashRenderer, spark1Renderer, spark2Renderer, waveRenderer"

How to set these Renderers' Parameters like 'srcFunc, destFunc and alphaSrc'?

Messages: 11 Date d'inscription: 2012-03-31

Another question?

"SPK_IRRRenderer.cpp":
namespace SPK
{
namespace IRR
{
IRRRenderer::IRRRenderer(irr::IrrlichtDevice* d) :
device(d),
currentBuffer(NULL)
{
...
material.MaterialType = irr::video::EMT_ONETEXTURE_BLEND; // To allow complex blending functions
setBlending(BLENDING_NONE); // Blending is disabled per default
...
}

the RED part, does it mean only support one texture blend? Should change its value?

You want to port this demo to SPARK 1.5.5 or SPARK 2.0 ?
You can use function for deep control, but the most common settings are 'NONE' (no blending), 'ALPHA' (particles will have alpha), 'ADD' (particle color will be added to the scene color) (see SPK::BlendMode).
Typically, fire is on 'ADD' and smoke on 'ALPHA'.

qidaozhilong2 wrote:

the RED part, does it mean only support one texture blend? Should change its value?

It means the material is set to use one_texture_blend algorithm : one texture which is blended with the rest of the scene. You don't have to change it.
Normally the renderer system will be reworked in SPARK2 in order to be able to use shaders, for example.

Important: The DirectX driver of Irrlicht has a bug for one_texture_blend: the color won't be added if you specify 'ADD'. I don't know any work around, maybe you'll have to fix this yourself by changing Irrlicht's source code.

_________________

Messages: 11 Date d'inscription: 2012-03-31

Darktib wrote:

You want to port this demo to SPARK 1.5.5 or SPARK 2.0 ?
You can use function for deep control, but the most common settings are 'NONE' (no blending), 'ALPHA' (particles will have alpha), 'ADD' (particle color will be added to the scene color) (see SPK::BlendMode).
Typically, fire is on 'ADD' and smoke on 'ALPHA'.

qidaozhilong2 wrote:

the RED part, does it mean only support one texture blend? Should change its value?

It means the material is set to use one_texture_blend algorithm : one texture which is blended with the rest of the scene. You don't have to change it.
Normally the renderer system will be reworked in SPARK2 in order to be able to use shaders, for example.

Important: The DirectX driver of Irrlicht has a bug for one_texture_blend: the color won't be added if you specify 'ADD'. I don't know any work around, maybe you'll have to fix this yourself by changing Irrlicht's source code.

Darktib, extremely thanks for your reply.

1) SPARK1.5.5
Like the picture i show, multi-texture alpha overlapped. The BLACK not transparent part occured.
The problem of multi-texture alpha error, i guess, is because of 'GL_MODULATE', but i can't find this setting on Irrlicht renderer. You know, 'GL_MODULATE' is an OpenGL parameter and Irrlicht also uses OpenGL.

2) Maybe i neglect an important information that Android Irrlicht using OpenGL1.x-2.0, not DirectX.

Android uses OpenGL ES, I don't know how it is supported by Irrlicht.

Have you tried

Code:

renderer->setBlending(SPK::BLENDING_ADD)

?

_________________

Developer Messages: 532 Date d'inscription: 2009-07-14 Age: 30

I ve notived problems of blending like that with OpenGL and Irrlicht (in the spark Irrlicht demo). Those problems were not there before. There must be a bug somewhere (either in Irrlicht or SPARK). I ll check that.

Messages: 11 Date d'inscription: 2012-03-31

Code:

/***********************************************************************************
*
*
* 11:30:04 AM May 10, 2011
*
* zhangbin
***********************************************************************************/

/*
* TODO:
* - Load texture files from assets folder
*/

#ifdef ANDROID_NDK
#include <jni.h>
#include <android/log.h>
#endif

#include <irrlicht.h>
// SPARK lib
#include <SPK.h>
#include <SPK_IRR.h>

#include "irrParticle_examples.h"

using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;
using namespace SPK;
using namespace SPK::IRR;

#ifdef ANDROID_NDK
int importGLInit();
void importGLDeinit();
#endif

const char * LOG_TAG = "irrParticle_examples";

#ifdef __LINUX
#else
const char * EG_ONE_POINT_TEXTURE="/sdcard/irrParticle_examples/point.bmp";

const char * EG_TWO_MODEL_FILE="/sdcard/irrParticle_examples/SceneFireCamp.obj";
const char * EG_TWO_FIRE_TEXTURE="/sdcard/irrParticle_examples/fire2.bmp";
const char * EG_TWO_EXPO_TEXTURE="/sdcard/irrParticle_examples/explosion.png";

const char * EG_THREE_EXPLO_TEXTURE="/sdcard/irrParticle_examples/explosion.bmp";
const char * EG_THREE_FLASH_TEXTURE="/sdcard/irrParticle_examples/flash.bmp";
const char * EG_THREE_SPARK1_TEXTURE="/sdcard/irrParticle_examples/spark1.bmp";
const char * EG_THREE_SPARK2_TEXTURE="/sdcard/irrParticle_examples/point.bmp";
const char * EG_THREE_WAVE_TEXTURE="/sdcard/irrParticle_examples/wave.bmp";

const char * EG_FOUR_BALL_TEXTURE="/sdcard/irrParticle_examples/ball.bmp";

#endif

// global variables
int gWindowWidth;
int gWindowHeight;

IrrlichtDevice *device = NULL;
IVideoDriver* driver = NULL;
ISceneManager* smgr = NULL;
ICameraSceneNode* camera=NULL;
IRRSystem* particleSystem = NULL;
Emitter* smokeEmitter = NULL;
Group* fireGroup = NULL;
Group* smokeGroup = NULL;
ILightSceneNode* lightNode=NULL;
Model* particleModel=NULL;

float angleY = 10.0f;
float angleX = -45.0f;
float camPosZ = 5.0f;

int initialized = 0;

float currenttime;
float oldtime;
float deltaTime;
float step;
float lightTime;

list<IRRSystem*> particleSystems;
SPK_ID BaseSystemID = NO_ID;
float spacePressed = -1.0f;

const size_t NB_PARTICLES = 250;

#ifdef ANDROID_NDK
#define LOG(args...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, args)
#else
#define LOG(args...) printf(args);
#endif

#ifdef ANDROID_NDK
/* For JNI: C++ compiler need this */
extern "C" {
#endif

/** Activity onCreate */
#ifdef ANDROID_NDK
void Java_ca_renzhi_Particle_MainActivity_nativeOnCreate( JNIEnv* env )
#else
void Java_ca_renzhi_Particle_MainActivity_nativeOnCreate()
#endif
{
}

/** Activity onPause */
#ifdef ANDROID_NDK
void Java_ca_renzhi_Particle_MainActivity_nativeOnPause( JNIEnv* env )
#else
void Java_ca_renzhi_Particle_MainActivity_nativeOnPause()
#endif
{
}

/** Activity onResume */
#ifdef ANDROID_NDK
void Java_ca_renzhi_Particle_MainActivity_nativeOnResume( JNIEnv* env )
#else
void Java_ca_renzhi_Particle_MainActivity_nativeOnResume()
#endif
{
}

/** Activity onDestroy */
#ifdef ANDROID_NDK
void Java_ca_renzhi_Particle_MainActivity_nativeOnDestroy( JNIEnv* env )
#else
void Java_ca_renzhi_Particle_MainActivity_nativeOnDestroy()
#endif
{
   device->drop();
#ifdef ANDROID_NDK
   importGLDeinit();
#endif
}

//SPARK Demo Irrlicht Basic
void init_exampleOne()
{
   camera = smgr->addCameraSceneNodeFPS(smgr->getRootSceneNode(),100.0f,0.0005f);
   camera->setPosition(vector3df(0.0f,2.5f,2.0f));
   camera->setTarget(vector3df(0.0f,0.0f,0.3f));
   camera->setNearValue(0.05f);

   // Inits Particle Engine
   randomSeed = device->getTimer()->getRealTime();
   // Sets the update step
   IRRSystem::setClampStep(true,0.1f);       // clamp the step to 100 ms
   IRRSystem::useAdaptiveStep(0.001f,0.01f);    // use an adaptive step from 1ms to 10ms (1000fps to 100fps)

   Vector3D gravity(0.0f,-0.8f,0.0f);

   IRRQuadRenderer* particleRenderer = IRRQuadRenderer::create(device);
   particleRenderer->setTexture(driver->getTexture(EG_ONE_POINT_TEXTURE));
   particleRenderer->setTexturingMode(TEXTURE_2D);
   particleRenderer->setScale(0.05f,0.05f);
   particleRenderer->setBlending(BLENDING_ADD);
   particleRenderer->enableRenderingHint(DEPTH_WRITE,false);

   // Model
   particleModel = Model::create(FLAG_RED | FLAG_GREEN | FLAG_BLUE | FLAG_ALPHA);
   particleModel->setParam(PARAM_ALPHA,0.8f); // constant alpha
   particleModel->setLifeTime(8.0f,8.0f);

   // Emitter
   SphericEmitter* particleEmitter = SphericEmitter::create(Vector3D(0.0f,1.0f,0.0f),0.1f * PI,0.1f * PI);
   particleEmitter->setZone(Point::create(Vector3D(0.0f,0.02f,0.0f)));
   particleEmitter->setFlow(250);
   particleEmitter->setForce(1.5f,1.5f);

   // Obstacle
   Plane* groundPlane = Plane::create();
   Obstacle* obstacle = Obstacle::create(groundPlane,INTERSECT_ZONE,0.6f,1.0f);

   // Group
   Group* particleGroup = Group::create(particleModel,2100);
   particleGroup->addEmitter(particleEmitter);
   particleGroup->setRenderer(particleRenderer);
   particleGroup->addModifier(obstacle);
   particleGroup->setGravity(gravity);
   particleGroup->enableAABBComputing(true);

   particleSystem = IRRSystem::create(smgr->getRootSceneNode(),smgr);
   particleSystem->addGroup(particleGroup);
   particleSystem->enableAABBComputing(true);

   // setup some useful variables
   currenttime=(f32)device->getTimer()->getTime() / 1000.0f;
   step = 0.0f;
}

//SPARK Demo Irrlicht Fire
void init_exampleTwo()
{
   camera = smgr->addCameraSceneNode(0,vector3df(camPosZ*sinf(angleX*DEGTORAD)*sinf((90.0f-angleY)*DEGTORAD),
                                 camPosZ*cosf((90.0f-angleY)*DEGTORAD),camPosZ*cosf(angleX*DEGTORAD)*sinf((90.0f-angleY)*DEGTORAD)),
                                 vector3df());
   camera->setNearValue(0.05f);

   IMesh* sceneryMesh = smgr->getMesh(EG_TWO_MODEL_FILE);
   ISceneNode* sceneryNode = smgr->addMeshSceneNode(sceneryMesh);
   sceneryNode->setPosition(vector3df(0.0f,-1.5f,0.0f));
   sceneryNode->setScale(vector3df(0.01f,0.01f,0.01f));

   smgr->setAmbientLight(SColorf(0.15f,0.15f,0.25f));

   lightNode = smgr->addLightSceneNode();
   lightNode->setLightType(ELT_SPOT);
   SLight& lightData = lightNode->getLightData();
   lightData.AmbientColor = SColorf(0.0f,0.0f,0.0f);
   lightData.DiffuseColor = SColorf(1.0f,0.75f,0.25f);
   lightData.InnerCone = 180.0f;
   lightData.OuterCone = 180.0f;
   lightData.Attenuation.X = 0.0f;
   lightData.Attenuation.Y = 0.0f;

   // random seed
   randomSeed = device->getTimer()->getRealTime();
   // Sets the update step
   IRRSystem::setClampStep(true,0.1f);       // clamp the step to 100 ms
   IRRSystem::useAdaptiveStep(0.001f,0.01f);    // use an adaptive step from 1ms to 10ms (1000fps to 100fps)

   // Inits Particle Engine

   // Renderers
   IRRQuadRenderer* fireRenderer = IRRQuadRenderer::create(device);
   fireRenderer->setScale(0.3f,0.3f);
   fireRenderer->setTexture(driver->getTexture(EG_TWO_FIRE_TEXTURE));
   fireRenderer->setTexturingMode(TEXTURE_2D);
   fireRenderer->setBlending(BLENDING_ADD);
   fireRenderer->enableRenderingHint(DEPTH_WRITE,false);
   fireRenderer->setAtlasDimensions(2,2);

   IRRQuadRenderer* smokeRenderer = IRRQuadRenderer::create(device);
   smokeRenderer->setScale(0.3f,0.3f);
   smokeRenderer->setTexture(driver->getTexture(EG_TWO_EXPO_TEXTURE));
   smokeRenderer->setTexturingMode(TEXTURE_2D);
   smokeRenderer->setBlending(BLENDING_ALPHA);
   smokeRenderer->enableRenderingHint(DEPTH_WRITE,false);
   smokeRenderer->setAtlasDimensions(2,2);

   // Models
   Model* fireModel = Model::create(FLAG_RED | FLAG_GREEN | FLAG_BLUE | FLAG_ALPHA | FLAG_SIZE | FLAG_ANGLE | FLAG_TEXTURE_INDEX,
   FLAG_RED | FLAG_GREEN | FLAG_ALPHA | FLAG_ANGLE,
   FLAG_RED | FLAG_GREEN | FLAG_TEXTURE_INDEX | FLAG_ANGLE,
   FLAG_SIZE);
   fireModel->setParam(PARAM_RED,0.8f,0.9f,0.8f,0.9f);
   fireModel->setParam(PARAM_GREEN,0.5f,0.6f,0.5f,0.6f);
   fireModel->setParam(PARAM_BLUE,0.3f);
   fireModel->setParam(PARAM_ALPHA,0.4f,0.0f);
   fireModel->setParam(PARAM_ANGLE,0.0f,2.0f * PI,0.0f,2.0f * PI);
   fireModel->setParam(PARAM_TEXTURE_INDEX,0.0f,4.0f);
   fireModel->setLifeTime(1.0f,1.5f);

   Interpolator* interpolator = fireModel->getInterpolator(PARAM_SIZE);
   interpolator->addEntry(0.5f,2.0f,5.0f);
   interpolator->addEntry(1.0f,0.0f);

   Model* smokeModel = Model::create(FLAG_RED | FLAG_GREEN | FLAG_BLUE | FLAG_ALPHA | FLAG_SIZE | FLAG_ANGLE | FLAG_TEXTURE_INDEX,
   FLAG_RED | FLAG_GREEN | FLAG_SIZE | FLAG_ANGLE,
   FLAG_TEXTURE_INDEX | FLAG_ANGLE,
   FLAG_ALPHA);
   smokeModel->setParam(PARAM_RED,0.3f,0.2f);
   smokeModel->setParam(PARAM_GREEN,0.25f,0.2f);
   smokeModel->setParam(PARAM_BLUE,0.2f);
   smokeModel->setParam(PARAM_ALPHA,0.2f,0.0f);
   smokeModel->setParam(PARAM_SIZE,5.0,10.0f);
   smokeModel->setParam(PARAM_TEXTURE_INDEX,0.0f,4.0f);
   smokeModel->setParam(PARAM_ANGLE,0.0f,2.0f * PI,0.0f,2.0f * PI);
   smokeModel->setLifeTime(5.0f,5.0f);

   interpolator = smokeModel->getInterpolator(PARAM_ALPHA);
   interpolator->addEntry(0.0f,0.0f);
   interpolator->addEntry(0.2f,0.2f);
   interpolator->addEntry(1.0f,0.0f);

   // Emitters
   // The emitters are arranged so that the fire looks realistic
   StraightEmitter* fireEmitter1 = StraightEmitter::create(Vector3D(0.0f,1.0f,0.0f));
   fireEmitter1->setZone(Sphere::create(Vector3D(0.0f,-1.0f,0.0f),0.5f));
   fireEmitter1->setFlow(40);
   fireEmitter1->setForce(1.0f,2.5f);

   StraightEmitter* fireEmitter2 = StraightEmitter::create(Vector3D(1.0f,0.6f,0.0f));
   fireEmitter2->setZone(Sphere::create(Vector3D(0.15f,-1.2f,0.075f),0.1f));
   fireEmitter2->setFlow(15);
   fireEmitter2->setForce(0.5f,1.5f);

   StraightEmitter* fireEmitter3 = StraightEmitter::create(Vector3D(-0.6f,0.8f,-0.8f));
   fireEmitter3->setZone(Sphere::create(Vector3D(-0.375f,-1.15f,-0.375f),0.3f));
   fireEmitter3->setFlow(15);
   fireEmitter3->setForce(0.5f,1.5f);

   StraightEmitter* fireEmitter4 = StraightEmitter::create(Vector3D(-0.8f,0.5f,0.2f));
   fireEmitter4->setZone(Sphere::create(Vector3D(-0.255f,-1.2f,0.225f),0.2f));
   fireEmitter4->setFlow(10);
   fireEmitter4->setForce(0.5f,1.5f);

   StraightEmitter* fireEmitter5 = StraightEmitter::create(Vector3D(0.1f,0.8f,-1.0f));
   fireEmitter5->setZone(Sphere::create(Vector3D(-0.075f,-1.2f,-0.3f),0.2f));
   fireEmitter5->setFlow(10);
   fireEmitter5->setForce(0.5f,1.5f);

   smokeEmitter = SphericEmitter::create(Vector3D(0.0f,1.0f,0.0f),0.0f,0.5f * PI);
   smokeEmitter->setZone(Sphere::create(Vector3D(),1.2f));
   smokeEmitter->setFlow(25);
   smokeEmitter->setForce(0.5f,1.0f);

   // Groups
   fireGroup = Group::create(fireModel,135);
   fireGroup->addEmitter(fireEmitter1);
   fireGroup->addEmitter(fireEmitter2);
   fireGroup->addEmitter(fireEmitter3);
   fireGroup->addEmitter(fireEmitter4);
   fireGroup->addEmitter(fireEmitter5);
   fireGroup->setRenderer(fireRenderer);
   fireGroup->setGravity(Vector3D(0.0f,3.0f,0.0f));
   fireGroup->enableAABBComputing(true);

   smokeGroup = Group::create(smokeModel,135);
   smokeGroup->addEmitter(smokeEmitter);
   smokeGroup->setRenderer(smokeRenderer);
   smokeGroup->setGravity(Vector3D(0.0f,0.4f,0.0f));
   smokeGroup->enableAABBComputing(true);

   // System
   particleSystem = IRRSystem::create(smgr->getRootSceneNode(),smgr);
   particleSystem->addGroup(smokeGroup);
   particleSystem->addGroup(fireGroup);
   particleSystem->enableAABBComputing(true);

   // setup some useful variables
   currenttime=(f32)device->getTimer()->getTime() / 1000.0f;
   lightTime = 0.05f;
}

SPK_ID createParticleSystemBase()
{
   ///////////////
   // Renderers //
   ///////////////

   // smoke renderer
   IRRQuadRenderer* smokeRenderer = IRRQuadRenderer::create(device);
   smokeRenderer->setTexturingMode(TEXTURE_2D);
   smokeRenderer->setTexture(driver->getTexture(EG_THREE_EXPLO_TEXTURE));
   smokeRenderer->setAtlasDimensions(2,2); // uses 4 different patterns in the texture
   smokeRenderer->setBlending(BLENDING_ALPHA);
   smokeRenderer->enableRenderingHint(DEPTH_WRITE,false);
   smokeRenderer->setShared(true);

   // flame renderer
   IRRQuadRenderer* flameRenderer = IRRQuadRenderer::create(device);
   flameRenderer->setTexturingMode(TEXTURE_2D);
   flameRenderer->setTexture(driver->getTexture(EG_THREE_EXPLO_TEXTURE));
   flameRenderer->setAtlasDimensions(2,2);
   flameRenderer->setBlending(BLENDING_ADD);
   flameRenderer->enableRenderingHint(DEPTH_WRITE,false);
   flameRenderer->setShared(true);

   // flash renderer
   IRRQuadRenderer* flashRenderer = IRRQuadRenderer::create(device);
   flashRenderer->setTexturingMode(TEXTURE_2D);
   flashRenderer->setTexture(driver->getTexture(EG_THREE_FLASH_TEXTURE));
   flashRenderer->setBlending(BLENDING_ADD);
   flashRenderer->enableRenderingHint(DEPTH_WRITE,false);
   flashRenderer->setShared(true);

   // spark 1 renderer
   IRRQuadRenderer* spark1Renderer = IRRQuadRenderer::create(device);
   spark1Renderer->setTexturingMode(TEXTURE_2D);
   spark1Renderer->setTexture(driver->getTexture(EG_THREE_SPARK1_TEXTURE));
   spark1Renderer->setBlending(BLENDING_ADD);
   spark1Renderer->enableRenderingHint(DEPTH_WRITE,false);
   spark1Renderer->setOrientation(DIRECTION_ALIGNED); // sparks are oriented function o their velocity
   spark1Renderer->setScale(0.05f,1.0f); // thin rectangles
   spark1Renderer->setShared(true);

   // spark 2 renderer
   IRRQuadRenderer* spark2Renderer = IRRQuadRenderer::create(device);
   spark2Renderer->setTexturingMode(TEXTURE_2D);
   spark2Renderer->setTexture(driver->getTexture(EG_THREE_SPARK2_TEXTURE));
   spark2Renderer->setScale(0.02f,0.02f);
   spark2Renderer->setBlending(BLENDING_ADD);
   spark2Renderer->enableRenderingHint(DEPTH_WRITE,false);
   spark2Renderer->setShared(true);

   // wave renderer
   IRRQuadRenderer* waveRenderer = IRRQuadRenderer::create(device);
   waveRenderer->setTexturingMode(TEXTURE_2D);
   waveRenderer->setTexture(driver->getTexture(EG_THREE_WAVE_TEXTURE));
   waveRenderer->setBlending(BLENDING_ALPHA);
   waveRenderer->enableRenderingHint(DEPTH_WRITE,false);
   waveRenderer->enableRenderingHint(ALPHA_TEST,true); // uses the alpha test
   waveRenderer->setAlphaTestThreshold(0.0f);
   waveRenderer->setOrientation(FIXED_ORIENTATION); // the orientatin is fixed
   waveRenderer->lookVector.set(0.0f,1.0f,0.0f);
   waveRenderer->upVector.set(1.0f,0.0f,0.0f); // we dont really care about the up axis
   waveRenderer->setShared(true);

   ////////////
   // Models //
   ////////////

   Interpolator* interpolator = NULL; // pointer to an interpolator that is used to retrieve interpolators

   // smoke model
   Model* smokeModel = Model::create(FLAG_RED | FLAG_GREEN | FLAG_BLUE | FLAG_ALPHA | FLAG_SIZE | FLAG_ANGLE | FLAG_TEXTURE_INDEX,
      FLAG_SIZE | FLAG_ANGLE,
      FLAG_SIZE | FLAG_ANGLE | FLAG_TEXTURE_INDEX,
      FLAG_ALPHA);
   smokeModel->setParam(PARAM_RED,0.2f);
   smokeModel->setParam(PARAM_GREEN,0.2f);
   smokeModel->setParam(PARAM_BLUE,0.2f);
   smokeModel->setParam(PARAM_SIZE,0.6f,0.8f,1.0f,1.4f);
   smokeModel->setParam(PARAM_TEXTURE_INDEX,0.0f,4.0f);
   smokeModel->setParam(PARAM_ANGLE,0.0f,PI * 0.5f,0.0f,PI * 0.5f);
   smokeModel->setLifeTime(2.5f,3.0f);
   smokeModel->setShared(true);

   interpolator = smokeModel->getInterpolator(PARAM_ALPHA);
   interpolator->addEntry(0.0f,0.0f);
   interpolator->addEntry(0.4f,0.4f,0.6f);
   interpolator->addEntry(0.6f,0.4f,0.6f);
   interpolator->addEntry(1.0f,0.0f);

   // flame model
   Model* flameModel = Model::create(FLAG_RED | FLAG_GREEN | FLAG_BLUE | FLAG_ALPHA | FLAG_SIZE | FLAG_ANGLE | FLAG_TEXTURE_INDEX,
      FLAG_ANGLE | FLAG_RED | FLAG_GREEN | FLAG_BLUE,
      FLAG_ANGLE | FLAG_TEXTURE_INDEX,
      FLAG_SIZE | FLAG_ALPHA);
   flameModel->setParam(PARAM_RED,1.0f,0.2f);
   flameModel->setParam(PARAM_GREEN,0.5f,0.2f);
   flameModel->setParam(PARAM_BLUE,0.2f,0.2f);
   flameModel->setParam(PARAM_TEXTURE_INDEX,0.0f,4.0f);
   flameModel->setParam(PARAM_ANGLE,0.0f,PI * 0.5f,0.0f,PI * 0.5f);
   flameModel->setLifeTime(1.5f,2.0f);
   flameModel->setShared(true);

   interpolator = flameModel->getInterpolator(PARAM_SIZE);
   interpolator->addEntry(0.0f,0.25f);
   interpolator->addEntry(0.02f,0.6f,0.8f);
   interpolator->addEntry(1.0f,1.0f,1.4f);

   interpolator = flameModel->getInterpolator(PARAM_ALPHA);
   interpolator->addEntry(0.5f,1.0f);
   interpolator->addEntry(1.0f,0.0f);

   // flash model
   Model* flashModel = Model::create(FLAG_ALPHA | FLAG_SIZE | FLAG_ANGLE,
      FLAG_NONE,
      FLAG_ANGLE,
      FLAG_ALPHA | FLAG_SIZE);
   flashModel->setParam(PARAM_ANGLE,0.0f,2.0f * PI);
   flashModel->setLifeTime(0.5f,0.5f);
   flashModel->setShared(true);

   interpolator = flashModel->getInterpolator(PARAM_SIZE);
   interpolator->addEntry(0.0f,0.25f);
   interpolator->addEntry(0.1f,1.0f,2.0f);

   interpolator = flashModel->getInterpolator(PARAM_ALPHA);
   interpolator->addEntry(0.0f,1.0f);
   interpolator->addEntry(0.4f,0.0f);

   // spark 1 model
   Model* spark1Model = Model::create(FLAG_SIZE | FLAG_ALPHA,
      FLAG_ALPHA,
      FLAG_SIZE);
   spark1Model->setParam(PARAM_ALPHA,1.0f,0.0f);
   spark1Model->setParam(PARAM_SIZE,0.2f,0.4f);
   spark1Model->setLifeTime(0.2f,1.0f);
   spark1Model->setShared(true);

   // spark 2 model
   Model* spark2Model = Model::create(FLAG_RED | FLAG_GREEN | FLAG_BLUE | FLAG_ALPHA,
      FLAG_GREEN | FLAG_BLUE | FLAG_ALPHA,
      FLAG_GREEN);
   spark2Model->setParam(PARAM_ALPHA,1.0f,0.0f);
   spark2Model->setParam(PARAM_RED,1.0f);
   spark2Model->setParam(PARAM_GREEN,1.0f,1.0f,0.3f,1.0f);
   spark2Model->setParam(PARAM_BLUE,0.7f,0.3f);
   spark2Model->setLifeTime(1.0f,3.0f);
   spark2Model->setShared(true);

   // wave model
   Model* waveModel = Model::create(FLAG_ALPHA | FLAG_SIZE,
      FLAG_SIZE | FLAG_ALPHA);
   waveModel->setParam(PARAM_SIZE,0.0f,4.0f);
   waveModel->setParam(PARAM_ALPHA,0.2f,0.0f);
   waveModel->setLifeTime(0.8f,0.8f);
   waveModel->setShared(true);

   //////////////
   // Emitters //
   //////////////

   // This zone will be used by several emitters
   Sphere* explosionSphere = Sphere::create(Vector3D(0.0f,0.0f,0.0f),0.4f);

   // smoke emitter
   RandomEmitter* smokeEmitter = RandomEmitter::create();
   smokeEmitter->setZone(Sphere::create(Vector3D(0.0f,0.0f,0.0f),0.6f),false);
   smokeEmitter->setFlow(-1);
   smokeEmitter->setTank(15);
   smokeEmitter->setForce(0.02f,0.04f);

   // flame emitter
   NormalEmitter* flameEmitter = NormalEmitter::create();
   flameEmitter->setZone(explosionSphere);
   flameEmitter->setFlow(-1);
   flameEmitter->setTank(15);
   flameEmitter->setForce(0.06f,0.1f);

   // flash emitter
   StaticEmitter* flashEmitter = StaticEmitter::create();
   flashEmitter->setZone(Sphere::create(Vector3D(0.0f,0.0f,0.0f),0.1f));
   flashEmitter->setFlow(-1);
   flashEmitter->setTank(3);

   // spark 1 emitter
   NormalEmitter* spark1Emitter = NormalEmitter::create();
   spark1Emitter->setZone(explosionSphere);
   spark1Emitter->setFlow(-1);
   spark1Emitter->setTank(20);
   spark1Emitter->setForce(2.0f,3.0f);

   // spark 2 emitter
   NormalEmitter* spark2Emitter = NormalEmitter::create();
   spark2Emitter->setZone(explosionSphere);
   spark2Emitter->setFlow(-1);
   spark2Emitter->setTank(400);
   spark2Emitter->setForce(0.4f,0.8f);

   // wave emitter
   StaticEmitter* waveEmitter = StaticEmitter::create();
   waveEmitter->setZone(Point::create());
   waveEmitter->setFlow(-1);
   waveEmitter->setTank(1);

   ////////////
   // Groups //
   ////////////

   // smoke group
   Group* smokeGroup = Group::create(smokeModel,15);
   smokeGroup->addEmitter(smokeEmitter);
   smokeGroup->setRenderer(smokeRenderer);
   smokeGroup->setGravity(Vector3D(0.0f,0.05f,0.0f));

   // flame group
   Group* flameGroup = Group::create(flameModel,15);
   flameGroup->addEmitter(flameEmitter);
   flameGroup->setRenderer(flameRenderer);

   // flash group
   Group* flashGroup = Group::create(flashModel,3);
   flashGroup->addEmitter(flashEmitter);
   flashGroup->setRenderer(flashRenderer);

   // spark 1 group
   Group* spark1Group = Group::create(spark1Model,20);
   spark1Group->addEmitter(spark1Emitter);
   spark1Group->setRenderer(spark1Renderer);
   spark1Group->setGravity(Vector3D(0.0f,-1.5f,0.0f));

   // spark 2 group
   Group* spark2Group = Group::create(spark2Model,400);
   spark2Group->addEmitter(spark2Emitter);
   spark2Group->setRenderer(spark2Renderer);
   spark2Group->setGravity(Vector3D(0.0f,-0.3f,0.0f));
   spark2Group->setFriction(0.4f);

   // wave group
   Group* waveGroup = Group::create(waveModel,1);
   waveGroup->addEmitter(waveEmitter);
   waveGroup->setRenderer(waveRenderer);

   ////////////
   // System //
   ////////////

   IRRSystem* system = IRRSystem::create(smgr->getRootSceneNode(),smgr);
   system->addGroup(smokeGroup);
   system->addGroup(flameGroup);
   system->addGroup(flashGroup);
   system->addGroup(spark1Group);
   system->addGroup(spark2Group);
   system->addGroup(waveGroup);

   // Gets a pointer to the base
   return system->getSPKID();
}

// Creates a particle system from the base system
IRRSystem* createParticleSystem(const Vector3D& pos)
{
   // Creates a copy of the base system
   IRRSystem* system = SPK_Copy(IRRSystem,BaseSystemID);

   // Locates the system at the given position
   system->setTransformPosition(pos);
   system->updateTransform(); // updates the world transform of system and its children

   return system;
}

void destroyParticleSystem(IRRSystem*& system)
{
   // Destroys the given system
   SPK_Destroy(system);
   system = NULL;
}

//SPARK Demo Irrlicht Explosion
void init_exampleThree()
{
   camera = smgr->addCameraSceneNodeFPS(smgr->getRootSceneNode(),100.0f,0.0005f);
   camera->setPosition(vector3df(0.0f,0.0f,2.5f));
   camera->setTarget(vector3df(0.0f,0.0f,0.3f));
   camera->setNearValue(0.05f);

   // random seed
   randomSeed = device->getTimer()->getRealTime();

   // Sets the update step
   IRRSystem::setClampStep(true,0.1f);       // clamp the step to 100 ms
   IRRSystem::useAdaptiveStep(0.001f,0.01f);    // use an adaptive step from 1ms to 10ms (1000fps to 100fps)

   BaseSystemID = createParticleSystemBase();

   spacePressed = 10.0f;
}

//SPARK Demo Irrlicht Collision2
void init_exampleFour()
{
   // random seed
   randomSeed = device->getTimer()->getRealTime();

   // Sets the update step
   IRRSystem::setClampStep(true,0.1f);       // clamp the step to 100 ms
   IRRSystem::useAdaptiveStep(0.001f,0.01f);    // use an adaptive step from 1ms to 10ms (1000fps to 100fps)

   // Inits Particle Engine
   // Renderers
   IRRRenderer* particleRenderer = NULL;
   IRRQuadRenderer* quadRenderer = IRRQuadRenderer::create(device);
   quadRenderer->setTexturingMode(TEXTURE_2D);
   quadRenderer->setTexture(driver->getTexture(EG_FOUR_BALL_TEXTURE));
   quadRenderer->setScale(0.15f,0.15f);
   particleRenderer = quadRenderer;

   particleRenderer->setBlending(BLENDING_NONE);
   particleRenderer->enableRenderingHint(ALPHA_TEST,true);
   particleRenderer->setAlphaTestThreshold(0.8f);

   // Model
   Model* particleModel = Model::create();
   particleModel->setImmortal(true);

   // Zone
   Sphere* sphere = Sphere::create(Vector3D(),1.0f - 0.15f / 2.0f);
   AABox* cube = AABox::create(Vector3D(),Vector3D(1.2f,1.2f,1.2f));

   // Obstacle
   Obstacle* obstacle = Obstacle::create(sphere,EXIT_ZONE,0.9f,0.9f);

   // Group
   Group* particleGroup = Group::create(particleModel,NB_PARTICLES);
   particleGroup->setRenderer(particleRenderer);
   particleGroup->addModifier(obstacle);
   particleGroup->addModifier(Collision::create(0.15f,0.9f));
   particleGroup->setFriction(0.1f);
   particleGroup->setGravity(Vector3D(0.0f,-1.5f,0.0f));
   particleGroup->enableAABBComputing(true);

   particleSystem = IRRSystem::create(smgr->getRootSceneNode(),smgr);
   particleSystem->addGroup(particleGroup);
   particleSystem->enableAABBComputing(true);
}

#ifdef ANDROID_NDK
void init(jint nExample)
#else
void init(int nExample)
#endif
{
#ifdef ANDROID_NDK
   importGLInit();
   device = createDevice(EDT_OGLES1, dimension2d<u32>(gWindowWidth, gWindowHeight), 16, false, false, false, 0);
#else
   device = createDevice(EDT_OPENGL, dimension2d<u32>(gWindowWidth, gWindowHeight), 16, false, false, false, 0);
#endif
   driver = device->getVideoDriver();
   smgr = device->getSceneManager();

   switch(nExample)
   {
      //SPARK Demo Irrlicht Basic
   case EXAMPLE_ONE:
      init_exampleOne();
      break;
   case EXAMPLE_TWO:
      //SPARK Demo Irrlicht Fire
      init_exampleTwo();
      break;
   case EXAMPLE_THREE:
      //SPARK Demo Irrlicht Explosion
      init_exampleThree();
      break;
   case EXAMPLE_FOUR:
      //SPARK Demo Irrlicht Collision2
      init_exampleFour();
      break;
   default:
      break;
   }
}

#ifdef ANDROID_NDK
void Java_ca_renzhi_Particle_MainActivity_nativeInitGL(JNIEnv* env, jobject thiz, jint w, jint h, jint nEg)
#else
void Java_ca_renzhi_Particle_MainActivity_nativeInitGL(int w, int h, int nEg)
#endif
{
   if (w > 0)
      gWindowWidth = w;
   if (h > 0)
      gWindowHeight = h;

   if (!initialized)
   {
      init(nEg);
   }
}

#ifdef ANDROID_NDK
void Java_ca_renzhi_Particle_MainActivity_nativeResize(JNIEnv* env, jobject thiz, jint w, jint h)
#else
void Java_ca_renzhi_Particle_MainActivity_nativeResize(int w, int h)
#endif
{
   gWindowWidth = w;
   gWindowHeight = h;
   dimension2d<unsigned int> size;
   size.Width = w;
   size.Height = h;
   device->getVideoDriver()->OnResize(size);
}

//SPARK Demo Irrlicht Basic
void drawIteration_exampleOne()
{
   if(device->isWindowActive())
   {
      oldtime = currenttime;
      currenttime = (f32)device->getTimer()->getTime() / 1000.0f;
      deltaTime = currenttime - oldtime;

      // Changes the color of the model over time
      step += deltaTime * 0.5f;
      particleModel->setParam(PARAM_RED,0.6f + 0.4f * sin(step));
      particleModel->setParam(PARAM_GREEN,0.6f + 0.4f * sin(step + PI * 2.0f / 3.0f));
      particleModel->setParam(PARAM_BLUE,0.6f + 0.4f * sin(step + PI * 4.0f / 3.0f));

      driver->beginScene(true, true, SColor(0,0,0,0));

      // Renders scene
      smgr->drawAll();

      driver->endScene();
   }
   else
   {
      device->closeDevice();
      device->drop();
   }
}

//SPARK Demo Irrlicht Fire
void drawIteration_exampleTwo()
{
   if(device->isWindowActive())
   {
      oldtime = currenttime;
      currenttime = (f32)device->getTimer()->getTime() / 1000.0f;
      deltaTime = currenttime - oldtime;

      lightTime += deltaTime;
      if (lightTime >= 0.05f)
      {
         float lightIntensity = 1.0f - (random(0.0f,0.05f) * 5.0f);
         lightTime -= lightTime;
         lightNode->setPosition(vector3df(random(-0.5f,0.5f),0.5f + random(-0.5f,0.5f),random(-0.5f,0.5f)));
         lightNode->getLightData().Attenuation.Z = 15.0f / lightIntensity;
      }

      driver->beginScene(true, true, SColor(0,0,0,0));

      // Renders scene
      smgr->drawAll();

      driver->endScene();
   }
   else
   {
      device->closeDevice();
      device->drop();
   }
}

//SPARK Demo Irrlicht
void drawIteration_exampleThree()
{
   if(device->isWindowActive())
   {
      oldtime = currenttime;
      currenttime = (f32)device->getTimer()->getTime() / 1000.0f;
      deltaTime = currenttime - oldtime;

      LOG("spacePressed=%f", spacePressed);
      if (spacePressed >= 0.0f)
      {
         spacePressed += deltaTime;
         if (spacePressed >= 10.0f)
         {
            Vector3D position(random(-2.0f,2.0f),random(-2.0f,2.0f),random(-2.0f,2.0f));
            particleSystems.push_back(createParticleSystem(position));

            spacePressed = 0.0f;
         }
      }

      list<IRRSystem*>::Iterator it = particleSystems.begin();
      while(it != particleSystems.end())
      {
         // Updates the particle systems
         if (!(*it)->update(deltaTime * 0.001f))
         {
            // If a system is sleeping, destroys it
            destroyParticleSystem(*it);
            // And erases its entry in the container
            it = particleSystems.erase(it);
         }
         else
            ++it;
      }

      driver->beginScene(true, true, SColor(0,0,0,0));

      // Renders all the particle systems
      for (it = particleSystems.begin(); it != particleSystems.end(); ++it)
         //(*it)->render();
         // Renders scene
         smgr->drawAll();

      driver->endScene();
   }
   else
   {
      device->closeDevice();
      device->drop();
   }

}

//SPARK Demo Irrlicht Collision2
void drawIteration_exampleFour()
{
   if(device->isWindowActive())
   {
      driver->beginScene(true, true, SColor(0,0,0,0));

      // Renders scene
      smgr->drawAll();

      driver->endScene();
   }
   else
   {
      device->closeDevice();
      device->drop();
   }

}

#ifdef ANDROID_NDK
void drawIteration(jint nExample)
#else
void drawIteration(int nExample)
#endif
{
   switch(nExample)
   {
   case EXAMPLE_ONE:
      //SPARK Demo Irrlicht Basic
      drawIteration_exampleOne();
      break;
   case EXAMPLE_TWO:
      //SPARK Demo Irrlicht Fire
      drawIteration_exampleTwo();
      break;
   case EXAMPLE_THREE:
      //SPARK Demo Irrlicht Explosion
      drawIteration_exampleThree();
      break;
   case EXAMPLE_FOUR:
      //SPARK Demo Irrlicht Collision2
      drawIteration_exampleFour();
      break;
   default:
      break;
   }

}

#ifdef ANDROID_NDK
void Java_ca_renzhi_Particle_MainActivity_nativeDrawIteration(JNIEnv* env, jobject thiz, jint nEg)
#else
void Java_ca_renzhi_Particle_MainActivity_nativeDrawIteration(int nEg)
#endif
{
#ifdef __LINUX
   while (device->run()) {
#else
   device->run();
#endif
   drawIteration(nEg);

#ifdef __LINUX
   }
#endif
}

#ifdef __LINUX
int main()
{
   Java_ca_renzhi_irrlicht_MainActivity_nativeInitGL(0, 0, 0);
   Java_ca_renzhi_irrlicht_MainActivity_nativeDrawIteration(0);
   Java_ca_renzhi_irrlicht_MainActivity_nativeOnDestroy();

   return 0;
}
#endif

#ifdef ANDROID_NDK
}
#endif

@Darktib: yes.
@Juff:
My code, Actually,
Java_ca_renzhi_Particle_MainActivity_nativeInitGL() CALL init()
....
case EXAMPLE_THREE:
//SPARK Demo Irrlicht Explosion
init_exampleThree();

Java_ca_renzhi_Particle_MainActivity_nativeDrawIteration() CALL drawIteration()
....
case EXAMPLE_THREE:
//SPARK Demo Irrlicht Explosion
drawIteration_exampleThree();

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One issue on explosion demo of SPARK using Irrlicht as a renderer?

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