/**
* Spray blood in all directions
**/
void EffectsManager::bloodSpray(const btVector3& location, float damage)
{
	SPK::RandomEmitter* emitter;
	SPK::Group* group;

	emitter = SPK::RandomEmitter::create();
	emitter->setZone(SPK::Point::create(SPK::Vector3D(location.x(), location.y() - 0.5f, location.z())));
	emitter->setFlow(-1);
	emitter->setTank(damage / 10.0f);
	emitter->setForce(5.0f, 10.0f);

	group = SPK::Group::create(model_blood, damage);
	group->addEmitter(emitter);
	group->setGravity(gravity);
	group->setRenderer(render_blood);
	st->addParticleGroup(group);
}
Exemple #2
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// Creates the base system and returns its ID
SPK::SPK_ID createParticleSystemBase(GLuint textureIndex)
{
    // Creates the model
    SPK::Model* model = SPK::Model::create(SPK::FLAG_RED | SPK::FLAG_GREEN | SPK::FLAG_BLUE | SPK::FLAG_ALPHA,
                                           SPK::FLAG_ALPHA,
                                           SPK::FLAG_RED | SPK::FLAG_GREEN | SPK::FLAG_BLUE);
    model->setParam(SPK::PARAM_ALPHA,1.0f,0.0f); // This makes the particles fade out over time
    model->setLifeTime(1.0f,2.0f);

    // Create the renderer
    SPK::GL::GLRenderer* renderer = NULL;
    // If the point sprite extension and the point parameter extensions are supported by the hardware, we use point sprites
    if ((SPK::GL::GLPointRenderer::loadGLExtPointSprite())&&(SPK::GL::GLPointRenderer::loadGLExtPointParameter()))
    {
        SPK::GL::GLPointRenderer* pointRenderer = SPK::GL::GLPointRenderer::create();
        pointRenderer->setType(SPK::POINT_SPRITE);
        pointRenderer->enableWorldSize(true);
        SPK::GL::GLPointRenderer::setPixelPerUnit(45.0f * 3.14159f / 180.f,screenHeight);
        pointRenderer->setSize(0.1f);
        pointRenderer->setTexture(textureIndex);
        renderer = pointRenderer;
    }
    else // else we use quads
    {
        SPK::GL::GLQuadRenderer* quadRenderer = SPK::GL::GLQuadRenderer::create();
        quadRenderer->setTexturingMode(SPK::TEXTURE_2D);
        quadRenderer->setScale(0.1f,0.1f);
        quadRenderer->setTexture(textureIndex);
        renderer = quadRenderer;
    }

    renderer->enableBlending(true);
    renderer->setBlendingFunctions(GL_SRC_ALPHA,GL_ONE); // additive blending
    renderer->setTextureBlending(GL_MODULATE); // the texture is modulated with the particle's color
    renderer->enableRenderingHint(SPK::DEPTH_TEST,false); // the depth test is disabled

    // Creates the zone
    SPK::Point* source = SPK::Point::create();

    // Creates the emitter
    SPK::RandomEmitter* emitter = SPK::RandomEmitter::create();
    emitter->setForce(2.8f,3.2f);
    emitter->setZone(source);
    emitter->setTank(500);
    emitter->setFlow(-1); // Creates all the particles in the tank at the first frame

    // Creates the Group
    SPK::Group* group = SPK::Group::create(model,500); // 500 particles is the maximum capacity of the group
    group->addEmitter(emitter);
    group->setGravity(SPK::Vector3D(0.0f,-1.0f,0.0f));
    group->setFriction(2.0f);
    group->setRenderer(renderer);

    // Creates the System
    SPK::System* system = SPK::System::create();
    system->addGroup(group);

    // Defines which objects will be shared by all systems
    model->setShared(true);
    renderer->setShared(true);

    // Creates the base and gets a pointer to the base
    return system->getSPKID();
}
SPK::SPK_ID createExplosion( const SparkDrawable::TextureIDMap& textureIDMap, int screenWidth, int screenHeight )
{
    SparkDrawable::TextureIDMap::const_iterator itr;
    GET_TEXTURE_ID( "explosion", textureExplosion );
    GET_TEXTURE_ID( "flash", textureFlash );
    GET_TEXTURE_ID( "spark1", textureSpark1 );
    GET_TEXTURE_ID( "spark2", textureSpark2 );
    GET_TEXTURE_ID( "wave", textureWave );
    
    //
    // Renderers
    //
    
    // smoke renderer
    SPK::GL::GLQuadRenderer* smokeRenderer = SPK::GL::GLQuadRenderer::create();
    smokeRenderer->setTexturingMode(SPK::TEXTURE_2D);
    smokeRenderer->setTexture(textureExplosion);
    smokeRenderer->setTextureBlending(GL_MODULATE);
    smokeRenderer->setAtlasDimensions(2,2); // uses 4 different patterns in the texture
    smokeRenderer->setBlending(SPK::BLENDING_ALPHA);
    smokeRenderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
    smokeRenderer->setShared(true);

    // flame renderer
    SPK::GL::GLQuadRenderer* flameRenderer = SPK::GL::GLQuadRenderer::create();
    flameRenderer->setTexturingMode(SPK::TEXTURE_2D);
    flameRenderer->setTexture(textureExplosion);
    flameRenderer->setTextureBlending(GL_MODULATE);
    flameRenderer->setAtlasDimensions(2,2);
    flameRenderer->setBlending(SPK::BLENDING_ADD);
    flameRenderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
    flameRenderer->setShared(true);

    // flash renderer
    SPK::GL::GLQuadRenderer* flashRenderer = SPK::GL::GLQuadRenderer::create();
    flashRenderer->setTexturingMode(SPK::TEXTURE_2D);
    flashRenderer->setTexture(textureFlash);
    flashRenderer->setTextureBlending(GL_REPLACE);
    flashRenderer->setBlending(SPK::BLENDING_ADD);
    flashRenderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
    flashRenderer->setShared(true);

    // spark 1 renderer
    SPK::GL::GLQuadRenderer* spark1Renderer = SPK::GL::GLQuadRenderer::create();
    spark1Renderer->setTexturingMode(SPK::TEXTURE_2D);
    spark1Renderer->setTexture(textureSpark1);
    spark1Renderer->setTextureBlending(GL_REPLACE);
    spark1Renderer->setBlending(SPK::BLENDING_ADD);
    spark1Renderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
    spark1Renderer->setOrientation(SPK::DIRECTION_ALIGNED); // sparks are oriented function o their velocity
    spark1Renderer->setScale(0.05f,1.0f); // thin rectangles
    spark1Renderer->setShared(true);

    // spark 2 renderer
    SPK::GL::GLRenderer* spark2Renderer = NULL;
    if ( SPK::GL::GLPointRenderer::loadGLExtPointSprite() &&
         SPK::GL::GLPointRenderer::loadGLExtPointParameter()) // uses point sprite if possible
    {
        SPK::GL::GLPointRenderer::setPixelPerUnit(45.0f * osg::PI / 180.0f, screenHeight);
        SPK::GL::GLPointRenderer* pointRenderer = SPK::GL::GLPointRenderer::create();
        pointRenderer->setType(SPK::POINT_SPRITE);
        pointRenderer->setTexture(textureSpark2);
        pointRenderer->setTextureBlending(GL_MODULATE);
        pointRenderer->enableWorldSize(true);
        pointRenderer->setSize(0.02f);
        spark2Renderer = pointRenderer;
    }
    else
    {
        SPK::GL::GLQuadRenderer* quadRenderer = SPK::GL::GLQuadRenderer::create();
        quadRenderer->setTexturingMode(SPK::TEXTURE_2D);
        quadRenderer->setTexture(textureSpark2);
        quadRenderer->setTextureBlending(GL_MODULATE);
        quadRenderer->setScale(0.02f,0.02f);
        spark2Renderer = quadRenderer;
    }
    spark2Renderer->setBlending(SPK::BLENDING_ADD);
    spark2Renderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
    spark2Renderer->setShared(true);

    // wave renderer
    SPK::GL::GLQuadRenderer* waveRenderer = SPK::GL::GLQuadRenderer::create();
    waveRenderer->setTexturingMode(SPK::TEXTURE_2D);
    waveRenderer->setTexture(textureWave);
    waveRenderer->setTextureBlending(GL_MODULATE);
    waveRenderer->setBlending(SPK::BLENDING_ALPHA);
    waveRenderer->enableRenderingHint(SPK::DEPTH_WRITE,false);
    waveRenderer->enableRenderingHint(SPK::ALPHA_TEST,true); // uses the alpha test
    waveRenderer->setAlphaTestThreshold(0.0f);
    waveRenderer->setOrientation(SPK::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
    //
    SPK::Interpolator* interpolator = NULL; // pointer to an interpolator that is used to retrieve interpolators    

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

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

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

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

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

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

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

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

    // wave model
    SPK::Model* waveModel = SPK::Model::create(
        SPK::FLAG_ALPHA | SPK::FLAG_SIZE,
        SPK::FLAG_SIZE | SPK::FLAG_ALPHA);
    waveModel->setParam(SPK::PARAM_SIZE,0.0f,4.0f);
    waveModel->setParam(SPK::PARAM_ALPHA,0.2f,0.0f);
    waveModel->setLifeTime(0.8f,0.8f);
    waveModel->setShared(true);
    
    //
    // Emitters
    //
    SPK::Sphere* explosionSphere = SPK::Sphere::create(SPK::Vector3D(0.0f,0.0f,0.0f),0.4f);

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

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

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

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

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

    // wave emitter
    SPK::StaticEmitter* waveEmitter = SPK::StaticEmitter::create();
    waveEmitter->setZone(SPK::Point::create());
    waveEmitter->setFlow(-1);
    waveEmitter->setTank(1);
    
    //
    // Groups
    //
    
    // smoke group
    SPK::Group* smokeGroup = SPK::Group::create(smokeModel,15);
    smokeGroup->addEmitter(smokeEmitter);
    smokeGroup->setRenderer(smokeRenderer);
    smokeGroup->setGravity(SPK::Vector3D(0.0f,0.0f,0.05f));

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

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

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

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

    // wave group
    SPK::Group* waveGroup = SPK::Group::create(waveModel,1);
    waveGroup->addEmitter(waveEmitter);
    waveGroup->setRenderer(waveRenderer);
    
    //
    // System
    //
    SPK::System* system = SPK::System::create();
    system->addGroup(waveGroup);
    system->addGroup(smokeGroup);
    system->addGroup(flameGroup);
    system->addGroup(flashGroup);
    system->addGroup(spark1Group);
    system->addGroup(spark2Group);
    return system->getSPKID();
}